CN120818776B - Device and method for controlling surface defects of alloyed hot-dip galvanized steel sheet - Google Patents
Device and method for controlling surface defects of alloyed hot-dip galvanized steel sheetInfo
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- CN120818776B CN120818776B CN202511308266.7A CN202511308266A CN120818776B CN 120818776 B CN120818776 B CN 120818776B CN 202511308266 A CN202511308266 A CN 202511308266A CN 120818776 B CN120818776 B CN 120818776B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/50—Controlling or regulating the coating processes
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/50—Controlling or regulating the coating processes
- C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to the technical field of steel material processing, in particular to a device and a method for controlling surface defects of an alloying hot dip galvanized steel sheet, wherein the device comprises an inlet input device, an integrated galvanization device and an outlet output device which are sequentially connected; the integrated galvanizing device is characterized in that a reducing gas circulation cabin is arranged on the outer layer of the integrated galvanizing device, an inlet cabin, a local pickling cabin, an annealing cabin, a galvanizing cabin, an induction heating cabin and an outlet cabin which are sequentially connected are arranged on the inner layer of the integrated galvanizing device, the local pickling cabin comprises a roller conveying device, nozzle mechanical arms are arranged above and below the roller conveying device, a waste liquid pool is arranged at the bottom of the local pickling cabin, the galvanizing cabin comprises a galvanizing pool, the galvanizing pool is arranged in the galvanizing cabin, and a first guide roller, a first limit roller, a second limit roller, a third limit roller and a second guide roller are sequentially arranged along a steel plate conveying path and are matched with the galvanizing pool to guide a steel plate to be immersed in and penetrated out of zinc liquid at a preset angle. The invention improves the galvanization efficiency and improves the corrosion resistance of the steel plate.
Description
Technical Field
The invention relates to the technical field of steel material processing, in particular to a device and a method for controlling surface defects of an alloyed hot-dip galvanized steel sheet.
Background
In the research field of surface treatment process of metal materials, hot dip galvanized steel sheets exhibit more remarkable corrosion resistance advantages than cold rolled steel sheets. Based on the characteristics, the hot dip galvanized steel sheet has extremely high application value and wide market demands in a plurality of key industrial application fields such as automobile manufacturing, household appliances, modern building construction and the like.
Currently, the quality requirements of zinc-iron alloyed plates in the market are increasingly high. The defects frequently occurring in the zinc-iron alloyed plate are point defects and sheet defects, wherein the point defects occur because iron oxide on the surface of the steel plate is not completely pickled, so that point oxides remain on the surface of the steel plate and are combined with zinc liquid to generate zinc-iron alloy phases, thereby causing surface defects.
In summary, the existing strip steel galvanizing device and method mainly aim at the problem of bubble retention in the galvanizing process and improve the binding force of a coating, and solve the problem of tension relaxation possibly occurring when strip steel is pressed into zinc liquid. In addition, the prior art (e.g., CN115216607B, CN119703265A, CN118038178 a) also discloses some general strip surface defect detection and treatment schemes. However, these prior approaches have focused on offline or online detection and classification of defects, or on preventing defect generation by adjusting the overall process parameters, or on cleaning the surface to expose the defects by physical or chemical means. For the defect of the special forming mechanism of the alloy hot dip galvanizing during the specific process, an effective on-line, real-time and closed-loop control means is lacking. In particular, how to integrate defect recognition, decision judgment and accurate execution into a systematic control device and method for linkage is still a difficulty in the prior art. Based on the technical problems, the invention provides a device and a method for controlling surface defects of an alloyed hot-dip galvanized steel sheet.
Disclosure of Invention
According to the technical problems that the zinc-iron alloyed plate has point defects and sheet defects caused by incomplete acid washing of iron oxide on the surface of the steel plate, the surface defect control device and method of the alloyed hot dip galvanized steel plate are provided. The invention mainly utilizes visual detection of an inlet input device to accurately identify the distribution of residual oxides on the surface of a steel plate, a local pickling cabin accurately and locally pickling a specific area according to the identification result, each cabin of the inner layer of the integrated galvanization device cooperates, and an outlet output device carries out dual detection feedback on the temperature and the surface quality, so that the residual ferric oxide on the surface of the steel plate is accurately removed, point defects are avoided, the generation of the sheet defects is inhibited by controlling parameters such as the posture, the temperature and the like of the steel plate in the galvanization process, the surface quality stability of the hot-dip galvanized steel plate is ensured by full-flow monitoring and feedback, and the requirements of the automobile industry and the like on the high-performance galvanized steel plate are adapted.
The invention adopts the following technical means:
the surface defect control device for the alloyed hot dip galvanized steel sheet comprises an inlet input device, an integrated galvanization device and an outlet output device which are connected in sequence, wherein the inlet input device inputs the steel sheet, and the outlet output device outputs a steel sheet finished product;
The integrated galvanization device is of a double-layer structure, the outer layer is provided with a reducing gas circulation cabin, and the inner layer is provided with an inlet cabin, a local acid washing cabin, an annealing cabin, a galvanization cabin, an induction heating cabin and an outlet cabin which are sequentially connected;
the local pickling cabin comprises a waste liquid pool, a roller conveying device and a nozzle mechanical arm, wherein the inlet end of the roller conveying device is communicated with the inlet cabin, the outlet end of the roller conveying device is communicated with the inlet end of the annealing cabin, the nozzle mechanical arm is arranged above and below the roller conveying device, and the waste liquid pool is arranged at the bottom of the local pickling cabin;
the zinc plating cabin comprises a zinc liquid pool, a first guide roller, a first limit roller, a second limit roller, a third limit roller and a second guide roller, wherein the zinc liquid pool is arranged in the zinc plating cabin, the first guide roller, the first limit roller, the second limit roller, the third limit roller and the second guide roller are sequentially arranged along a steel plate conveying path and are matched with the zinc liquid pool to guide a steel plate to be immersed in and pass through the zinc liquid at a preset angle, the inlet end of the zinc plating cabin is communicated with the outlet end of the annealing cabin, and the outlet end of the zinc plating cabin is communicated with the inlet end of the induction heating cabin.
Further, the induction heating cabin comprises a second transverse induction heater, the second transverse induction heater comprises a first induction coil and a second induction coil, the first induction coil is arranged above and below the steel plate moving path, the second induction coil is arranged on the side face of the steel plate moving path, the inlet end of the induction heating cabin is communicated with the outlet end of the galvanized cabin, and the outlet end of the induction heating cabin is communicated with the outlet cabin.
Further, the reducing gas circulation cabin comprises an upper reducing gas cabin and a lower reducing gas cabin which are communicated, the inlet cabin is provided with an inlet gas concentration detector, and the outlet cabin is provided with an outlet gas concentration detector. When the detection values of the inlet gas concentration detector and the outlet gas concentration detector reach the preset reducing gas concentration requirement, the reducing gas concentration in the device is determined to reach the standard.
Further, the annealing chamber comprises a first transverse induction heater, an inlet end of the annealing chamber is communicated with an outlet end of the local pickling chamber, and an outlet end of the annealing chamber is communicated with an inlet end of the galvanization chamber.
Further, the entry input device comprises a vertical distance meter, a horizontal distance meter and a first camera, wherein the horizontal distance meter and the vertical distance meter are used for measuring width and thickness data of the steel plate, and the first camera is used for carrying out visual detection on the steel plate to obtain residual oxide data on the surface of the steel plate.
Further, the outlet output device comprises a thermal infrared imager and a second camera, wherein the thermal infrared imager is used for testing and obtaining a temperature detection result of the steel plate finished product, and the second camera is used for detecting surface defects of the steel plate finished product.
The method for controlling the surface defects of the alloyed hot-dip galvanized steel sheet is realized based on the device for controlling the surface defects of the alloyed hot-dip galvanized steel sheet and comprises the following steps:
S1, the inlet input device performs visual detection on the steel plate to obtain data of residual oxides on the surface of the steel plate and data of thickness and width of the steel plate, judges whether local pickling is needed or not based on the data of the residual oxides on the surface of the steel plate, and determines a local pickling area in the steel plate if the local pickling is needed;
S2, conveying the steel plate subjected to visual detection to an integrated galvanization device, wherein the integrated galvanization device comprises a local acid washing cabin, an annealing cabin, a galvanization cabin and an induction heating cabin which are sequentially connected, and introducing reducing gas into the integrated galvanization device;
s3, detecting whether the partial pickling is needed according to the residual oxide data on the surface of the steel plate based on the visual detection system after the concentration of the reducing gas reaches the preset concentration, and if so, carrying out partial pickling on the steel plate subjected to visual detection by a partial pickling tank according to the region needing the partial pickling, and conveying the steel plate subjected to the partial pickling to an annealing tank after the partial pickling;
S4, sequentially passing the steel plate obtained in the S3 through an annealing cabin, a galvanizing cabin and an induction heating cabin to obtain a steel plate finished product;
s5, conveying the steel plate finished product to an outlet output device, testing the temperature of the steel plate finished product by the outlet output device, judging whether the surface of the steel plate finished product reaches a specified temperature or not and whether the temperature is uniform or not based on a temperature result, and outputting the steel plate finished product after judging that the surface reaches the specified temperature and the temperature is uniform.
Further, when the temperature test result does not reach the temperature range, increasing the heater power of the induction heating cabin;
And detecting surface defects of the steel plate finished product, if the surface of the steel plate finished product has sheet white spot defects, prolonging the heat preservation time of the steel plate in the induction heating cabin, and if the surface of the steel plate finished product has dot white spot defects, increasing the pickling time of the steel plate in the local pickling cabin.
Further, the heating method of the induction heating area comprises the following steps:
The galvanized steel sheet is characterized in that a first coil is arranged above and below the galvanized steel sheet, a second coil is arranged on the side face of the galvanized steel sheet, whether the width of the steel sheet meets the induction heating range of the first coil or not is measured, if the width of the steel sheet meets the induction heating range of the first coil, the first coil is started to heat the galvanized steel sheet, and if the width of the steel sheet does not meet the induction heating range of the first coil, the first coil and the second coil are started to heat the galvanized steel sheet at the same time, so that the uniformity of heating of all positions of the galvanized steel sheet is ensured.
Further, the outlet output device tests the temperature of the steel plate finished product, and comprises:
The outlet output device is provided with an infrared thermal imager, and the infrared thermal imager tests five equal division points in the width direction and three equal division points in the thickness direction of the steel plate finished product to obtain a temperature detection result of the steel plate finished product.
Compared with the prior art, the invention has the following advantages:
1. the device integrally adopts a double-layer structure design, and the outer layer is a reducing gas circulation cabin which provides an anaerobic environment for the device. The inlet cabin, the local acid washing cabin, the annealing cabin, the galvanization cabin, the induction heating cabin and the outlet cabin are mutually communicated, so that no oxidation is ensured in the galvanization process of the strip steel.
2. The transverse induction heater is provided with the upper coil, the lower coil, the left coil and the right coil, so that the strip steel is heated more uniformly, and the surface defects of the strip steel caused by uneven heating are reduced.
3. The invention can feed back and regulate the problems of galvanized strip steel in time to ensure the subsequent production. The control system increases the induction heating power of the subsequent production for the temperature which does not reach the specified temperature range, and the control system feeds back to prolong the pickling time of the subsequent production process for the punctiform white spots, and the control system prolongs the induction heating time for the flaky white spots.
For the reasons, the invention can be widely popularized in the fields of steel material processing and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for controlling surface defects of an alloyed hot-dip galvanized steel sheet.
Fig. 2 is an overall device diagram of the surface defect control device for the galvannealed steel sheet provided by the invention.
Fig. 3 is an internal structural view of the integrated galvanization apparatus provided by the invention.
Fig. 4 is a schematic diagram of an inlet input device provided by the present invention.
Fig. 5 is a schematic diagram of an outlet output device according to the present invention.
Fig. 6 is a schematic diagram of a heating structure in an induction heating area provided by the invention.
Fig. 7 is a schematic diagram of a temperature measuring point of a finished steel plate provided by the invention.
The device comprises a1 inlet input device, a2 outlet output device, a 3 waste liquid pool, a 4 nozzle mechanical arm, a 5 roller conveying device, a 6 inlet cabin, a 7 inlet gas concentration detector, a 8 upper reducing gas cabin, a 9 local pickling cabin, a 10 annealing cabin, a 11 first transverse induction heater, a 12 galvanized cabin, a 13 second limiting roller, a 14 induction heating cabin, a 15 second transverse induction heater, a 16 outlet cabin, a 17 outlet gas concentration detector, a 18 second guide roller, a 19 third limiting roller, a 20 zinc liquid pool, a 21 first limiting roller, a 22 first guide roller, a 23 lower reducing gas cabin, a 24 first camera, a 25 horizontal range finder, a 26 infrared thermal imager, a 27 vertical range finder and a 28 second camera.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 2, the surface defect control device for the alloyed hot-dip galvanized steel sheet comprises an inlet input device 1, an integrated galvanization device and an outlet output device 2 which are connected in sequence, wherein the inlet input device 1 inputs the steel sheet, and the outlet output device 2 outputs a steel sheet finished product.
As shown in fig. 3, the integrated galvanizing device has a double-layer structure, wherein the outer layer is provided with a reducing gas circulation cabin, and the inner layer is provided with an inlet cabin 6, a partial pickling cabin 9, an annealing cabin 10, a galvanizing cabin 12, an induction heating cabin 14 and an outlet cabin 16 which are sequentially connected. The whole device adopts a closed structure, and reducing gas of 20 percent of H 2 and 80 percent of N 2 is introduced into the device to prevent the oxidation reaction of the steel plate and oxygen in the air from generating oxides in the subsequent process, thereby affecting the uniformity of the galvanization of the steel plate.
The local pickling cabin 9 comprises a waste liquid pool 3, a roller conveying device 5 and a nozzle mechanical arm 4, wherein the inlet end of the roller conveying device 5 is communicated with the inlet cabin 6, the outlet end of the roller conveying device 5 is communicated with the inlet end of an annealing cabin 10, the nozzle mechanical arm 4 is arranged above and below the roller conveying device 5, and the waste liquid pool 3 is arranged at the bottom of the local pickling cabin 9.
The nozzle mechanical arm 4 sprays dilute hydrochloric acid solution and clean water to clean oxides on the surface of the steel plate in a directional mode, and after the cleaning is finished, the steel plate is conveyed to the annealing cabin 10.
The zinc plating cabin 12 comprises a zinc liquid pool 20, a first guide roller 22, a first limit roller 21, a second limit roller 13, a third limit roller 19 and a second guide roller 18, wherein the zinc liquid pool 20 is arranged in the zinc plating cabin 12, the first guide roller 22, the first limit roller 21, the second limit roller 13, the third limit roller 19 and the second guide roller 18 are sequentially arranged along a steel plate conveying path and are matched with the zinc liquid pool 20 to guide a steel plate to be immersed into and penetrated out of zinc liquid at a preset angle, the inlet end of the zinc plating cabin 12 is communicated with the outlet end of the annealing cabin 10, and the outlet end of the zinc plating cabin 12 is communicated with the inlet end of the induction heating cabin 14.
Further, the induction heating chamber 14 includes a second lateral induction heater 15, the second lateral induction heater 15 includes a first induction coil and a second induction coil, the first induction coil is disposed above and below the steel plate moving path, the second induction coil is disposed at a side of the steel plate moving path, an inlet end of the induction heating chamber 14 is communicated with an outlet end of the zinc-plating chamber 12, and an outlet end of the induction heating chamber 14 is communicated with the outlet chamber 16.
The first induction coil is a diamond induction coil, and the second induction coil is a rectangular induction coil. The galvanized sheet can be heated to 500-550 ℃ in 10 seconds in the heating process, the whole temperature difference of the steel sheet is smaller than +/-10 ℃ through the heat supplement of the rectangular edge coil for the oversized steel sheet, 4 groups of induction heaters are arranged, the first two groups are responsible for heating the strip steel to the specified temperature, the second two groups supplement the heat for the strip steel, and the reaction time of the zinc layer and the strip steel is prolonged.
Further, the reducing gas circulation tank includes an upper reducing gas tank 8 and a lower reducing gas tank 23 which are communicated, the inlet tank 6 is provided with an inlet gas concentration detector 7, and the outlet tank 16 is provided with an outlet gas concentration detector 17. When the detection values of the inlet gas concentration detector 7 and the outlet gas concentration detector 17 reach the preset reducing gas concentration requirement, the reducing gas concentration in the device is determined to reach the standard.
Further, the annealing chamber 10 comprises a first transverse induction heater 11, the inlet end of the annealing chamber 10 being in communication with the outlet end of the partial pickling chamber 9, the outlet end of the annealing chamber 10 being in communication with the inlet end of the galvanising chamber 12.
As shown in fig. 4, further, the inlet input device 1 includes a vertical distance meter 27, a horizontal distance meter 25, and a first camera 24, the horizontal distance meter 25 and the vertical distance meter 27 are used for measuring width and thickness data of the steel plate, and the first camera 24 is used for performing visual inspection on the steel plate to obtain residual oxide data on the surface of the steel plate. The laser distance measuring instrument is used for measuring the thickness with the accuracy of 0.1mm under the motion state of the steel plate according to the principle of an optical triangulation method. And (5) projecting laser to the moving steel plate, receiving reflected light, and calculating to obtain the width and thickness data of the steel plate.
As shown in fig. 5, further, the outlet output device 2 includes a thermal infrared imager 26 and a second camera 28, where the thermal infrared imager 26 is used for testing to obtain a temperature detection result of the steel plate finished product, and the second camera 28 is used for detecting surface defects of the steel plate finished product.
As shown in fig. 1, the embodiment of the invention further includes a method for controlling surface defects of an alloyed hot-dip galvanized steel sheet, which is implemented based on the device for controlling surface defects of an alloyed hot-dip galvanized steel sheet, and specifically includes the following steps:
S1, the inlet input device 1 performs visual detection on a steel plate by using a high-resolution CCD camera to obtain data of residual oxides on the surface of the steel plate and data of thickness and width of the steel plate, judges whether local pickling is needed or not based on the data of the residual oxides on the surface of the steel plate, and determines a local pickling area in the steel plate if the local pickling is needed.
S2, conveying the steel plate subjected to visual detection to an integrated galvanization device, wherein the integrated galvanization device comprises a local pickling tank 9, an annealing tank 10, a galvanization tank 12 and an induction heating tank 14 which are sequentially connected, and introducing reducing gas into the integrated galvanization device.
S3, after the concentration of the reducing gas reaches the preset concentration, detecting whether the partial pickling is needed according to the residual oxide data on the surface of the steel plate based on a visual detection system, if so, carrying out partial pickling on the steel plate subjected to visual detection by the partial pickling tank 9 according to the required partial pickling area, and conveying the steel plate subjected to the partial pickling to the annealing tank 10 after carrying out the partial pickling, and if not, conveying the steel plate to the annealing tank 10.
S4, sequentially passing the steel plate obtained in the step S3 through an annealing cabin 10, a galvanizing cabin 12 and an induction heating cabin 14 to obtain a steel plate finished product.
S5, conveying the steel plate finished product to an outlet output device 2, testing the temperature of the steel plate finished product by the outlet output device 2, judging whether the surface of the steel plate finished product reaches a specified temperature or not and whether the temperature is uniform or not based on a temperature result, and outputting the steel plate finished product after judging that the surface reaches the specified temperature and the temperature is uniform.
As a preferred mode of the embodiment of the present invention, the heater power of the induction heating pod 14 is increased when the temperature test results do not reach the temperature range. And (3) detecting surface defects of the steel plate finished product, if the surface of the steel plate finished product has flaky white spot defects, prolonging the heat preservation time of the steel plate in the induction heating cabin 14, and if the surface of the steel plate finished product has punctiform white spot defects, increasing the pickling time of the steel plate in the local pickling cabin 9.
As a preferred mode of the embodiment of the present invention, the heating method of the induction heating region is as follows:
As shown in fig. 6, a first coil is arranged above and below the galvanized steel sheet, a second coil is arranged on the side surface of the galvanized steel sheet, whether the width of the steel sheet meets the induction heating range of the first coil or not is measured, if the width of the steel sheet meets the induction heating range of the first coil, the first coil is started to heat the galvanized steel sheet, and if the width of the steel sheet does not meet the induction heating range of the first coil, the first coil and the second coil are started to heat the galvanized steel sheet at the same time so as to ensure that all positions of the galvanized steel sheet are heated uniformly.
Specifically, in the induction heating region, the steel sheet is subjected to transverse induction heating. If the width of the steel plate is close to the induction heating range of the coil I, a scheme I is adopted for heating the steel plate, namely a first coil (coil I) is started for transverse induction heating of the galvanized steel plate, and if the width of the steel plate is found to be larger than the induction heating range of the coil I, a scheme II is adopted for heating the galvanized steel plate, namely the coil I and a second coil (coil II) are started for heating the steel plate at the same time, and the coil II has the functions of supplementing heat to the part which cannot be heated by the coil I and the edge of the steel plate, so that the surface of the steel plate is uniformly heated in all positions.
Diamond induction coils are arranged on the upper surface and the lower surface of the steel plate, rapid heating is realized through a medium-high frequency power supply, the surface temperature of the steel plate is ensured to be heated to 500-550 ℃ within 10 seconds, heat preservation is carried out for 10 seconds, and zinc and the steel plate are promoted to fully react to form zinc-iron alloy. Rectangular induction coils are additionally arranged in the left and right thickness directions of the steel plate to compensate for uneven induction heating in the thickness direction, and the whole temperature difference of the steel plate is ensured to be less than +/-10 ℃. And (3) measuring the temperature of the zinc-iron alloy steel plate after induction heating, and ensuring that zinc and iron react at a proper temperature.
As a preferred mode of the embodiment of the present invention, as shown in fig. 7, the outlet output device 2 tests the temperature of the steel plate finished product by:
the outlet output device 2 is provided with a thermal infrared imager 26, and the thermal infrared imager 26 tests the five-equal-dividing point in the width direction and the three-equal-dividing point in the thickness direction of the steel plate finished product to obtain the temperature detection result of the steel plate finished product.
Specifically, after the galvanized steel sheet is subjected to induction heating, the galvanized steel sheet is transmitted to an outlet output device 2 through a device outlet cabin 16 for temperature measurement, and the temperature of five points (C, D, E, F, G) in the width direction and three points (A, B, C) in the thickness direction are acquired in real time through a thermal infrared imager 26, so that an integral temperature cloud image of the steel sheet is generated in real time. In fig. 7, a temperature measurement point (A, B, C, D, E, F, G) is represented using a black dot. If the surface temperature of the galvanized steel sheet does not reach 500-550 ℃, the control system is used for feedback, the induction heating power is increased, and the steel strip is ensured to be heated to the set temperature. When the surface temperature of the galvanized steel sheet reaches 500-550 ℃, detecting defects on the surface of the galvanized steel sheet, and if sheet white spot defects appear, feeding back the defects by a control system, and reducing the conveying speed of the strip steel so as to prolong the time of the strip steel in an induction heater. If spot white spots appear, when the zinc layer reacts with the strip steel to generate zinc-iron alloy, the zinc-iron alloying degree at the defect position is lower than that of the surrounding area, so that the spot white spots are generated. And the control system is used for feeding back, so that the time for carrying out local pickling on the strip steel in the subsequent production is prolonged.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (8)
1. The surface defect control device for the alloyed hot-dip galvanized steel plate is characterized by comprising an inlet input device, an integrated galvanization device and an outlet output device which are connected in sequence, wherein the inlet input device inputs the steel plate, and the outlet output device outputs a steel plate finished product;
The integrated galvanization device is of a double-layer structure, the outer layer is provided with a reducing gas circulation cabin, and the inner layer is provided with an inlet cabin, a local acid washing cabin, an annealing cabin, a galvanization cabin, an induction heating cabin and an outlet cabin which are sequentially connected;
the local pickling cabin comprises a waste liquid pool, a roller conveying device and a nozzle mechanical arm, wherein the inlet end of the roller conveying device is communicated with the inlet cabin, the outlet end of the roller conveying device is communicated with the inlet end of the annealing cabin, the nozzle mechanical arm is arranged above and below the roller conveying device, and the waste liquid pool is arranged at the bottom of the local pickling cabin;
The galvanized cabin comprises a zinc liquid pool, a first guide roller, a first limit roller, a second limit roller, a third limit roller and a second guide roller, wherein the zinc liquid pool is arranged in the galvanized cabin, the first guide roller, the first limit roller, the second limit roller, the third limit roller and the second guide roller are sequentially arranged along a steel plate conveying path and are matched with the zinc liquid pool to guide a steel plate to dip in and penetrate out of the zinc liquid at a preset angle, the inlet end of the galvanized cabin is communicated with the outlet end of the annealing cabin, and the outlet end of the galvanized cabin is communicated with the inlet end of the induction heating cabin;
The inlet input device comprises a vertical distance meter, a horizontal distance meter and a first camera, wherein the horizontal distance meter and the vertical distance meter are used for measuring width and thickness data of a steel plate, and the first camera is used for carrying out visual detection on the steel plate to obtain residual oxide data on the surface of the steel plate;
the outlet output device comprises a thermal infrared imager and a second camera, wherein the thermal infrared imager is used for testing and obtaining a temperature detection result of the steel plate finished product, and the second camera is used for detecting surface defects of the steel plate finished product.
2. The galvannealed steel sheet surface defect control device of claim 1, wherein the induction heating chamber comprises a second lateral induction heater comprising a first induction coil and a second induction coil, the first induction coil being arranged above and below the steel sheet movement path, the second induction coil being arranged at a side of the steel sheet movement path, an inlet end of the induction heating chamber being in communication with an outlet end of the zinc-plated chamber, an outlet end of the induction heating chamber being in communication with the outlet chamber.
3. The surface defect control device for galvannealed steel sheet according to claim 1, characterized in that the reducing gas circulation tank includes an upper reducing gas tank and a lower reducing gas tank which are communicated, the inlet tank is provided with an inlet gas concentration detector, and the outlet tank is provided with an outlet gas concentration detector.
4. The galvannealed steel sheet surface defect control device of claim 1, wherein the annealing chamber comprises a first transverse induction heater, an inlet end of the annealing chamber being in communication with an outlet end of the local pickling chamber, the outlet end of the annealing chamber being in communication with an inlet end of the galvanization chamber.
5. The method for controlling the surface defects of the alloyed hot-dip galvanized steel sheet, which is realized based on the device for controlling the surface defects of the alloyed hot-dip galvanized steel sheet according to any one of the claims 1 to 4, is characterized by comprising the following steps:
S1, the inlet input device performs visual detection on the steel plate to obtain data of residual oxides on the surface of the steel plate and data of thickness and width of the steel plate, judges whether local pickling is needed or not based on the data of the residual oxides on the surface of the steel plate, and determines a local pickling area in the steel plate if the local pickling is needed;
S2, conveying the steel plate subjected to visual detection to an integrated galvanization device, wherein the integrated galvanization device comprises a local acid washing cabin, an annealing cabin, a galvanization cabin and an induction heating cabin which are sequentially connected, and introducing reducing gas into the integrated galvanization device;
s3, after the concentration of the reducing gas reaches a preset concentration, carrying out local pickling on the steel plate subjected to visual detection by a local pickling tank according to the local pickling area required if the local pickling is required based on the result of whether the local pickling is required or not, and conveying the steel plate subjected to the local pickling to an annealing tank after the local pickling;
S4, sequentially passing the steel plate obtained in the S3 through an annealing cabin, a galvanizing cabin and an induction heating cabin to obtain a steel plate finished product;
s5, conveying the steel plate finished product to an outlet output device, testing the temperature of the steel plate finished product by the outlet output device, judging whether the surface of the steel plate finished product reaches a specified temperature or not and whether the temperature is uniform or not based on a temperature result, and outputting the steel plate finished product after judging that the surface reaches the specified temperature and the temperature is uniform.
6. The method for controlling surface defects of a galvannealed steel sheet according to claim 5, wherein the heater power of the induction heating capsule in the subsequent production is increased when the temperature test result does not reach the temperature range;
and detecting surface defects of the steel plate finished product, if the surface of the steel plate finished product has sheet white spot defects, prolonging the heat preservation time of the steel plate produced subsequently in the induction heating cabin, and if the surface of the steel plate finished product has dot white spot defects, increasing the pickling time of the steel plate produced subsequently in the local pickling cabin.
7. The method for controlling surface defects of a galvannealed steel sheet according to claim 5, wherein the heating method of the induction heating region is:
The galvanized steel sheet is characterized in that a first coil is arranged above and below the galvanized steel sheet, a second coil is arranged on the side face of the galvanized steel sheet, whether the width of the steel sheet meets the induction heating range of the first coil or not is measured, if the width of the steel sheet meets the induction heating range of the first coil, the first coil is started to heat the galvanized steel sheet, and if the width of the steel sheet does not meet the induction heating range of the first coil, the first coil and the second coil are started to heat the galvanized steel sheet at the same time, so that the uniformity of heating of all positions of the galvanized steel sheet is ensured.
8. The method for controlling surface defects of a galvannealed steel sheet according to claim 5, wherein the outlet output device tests the temperature of the finished steel sheet product, comprising:
The outlet output device is provided with an infrared thermal imager, and the infrared thermal imager tests five equal division points in the width direction and three equal division points in the thickness direction of the steel plate finished product to obtain a temperature detection result of the steel plate finished product.
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| CN112513312A (en) * | 2018-07-30 | 2021-03-16 | 日本制铁株式会社 | Method for manufacturing hot-dip galvanized steel sheet and method for manufacturing alloyed hot-dip galvanized steel sheet |
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| JPH1161368A (en) * | 1997-08-18 | 1999-03-05 | Nkk Corp | Hot rolled steel sheet hot dip coating equipment |
| CN202047124U (en) * | 2011-04-13 | 2011-11-23 | 宝山钢铁股份有限公司 | Hot rolling pickling strip steel continuous hot galvanizing production line |
| WO2016056178A1 (en) * | 2014-10-08 | 2016-04-14 | Ｊｆｅスチール株式会社 | Continuous hot-dip metal plating method, hot-dip zinc-plated steel strip, and continuous hot-dip metal plating equipment |
| CN215251102U (en) * | 2021-06-30 | 2021-12-21 | 日照宝华新材料有限公司 | Ultrathin hot-base non-spangle hot-galvanized sheet production unit |
| CN117660859A (en) * | 2022-08-24 | 2024-03-08 | 宝钢日铁汽车板有限公司 | A method and identification system for alloying defect adjustment of GA hot-dip galvanizing products |
| CN115386820A (en) * | 2022-08-30 | 2022-11-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Compound production line and production process for hot-base galvanized plate and pickled plate |
| CN116005092B (en) * | 2022-12-14 | 2023-09-12 | 河北燕赵蓝天板业集团有限责任公司 | Gradient type heat supplementing device and method for reducing zinc slag on surface of hot dip galvanized steel sheet |
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| CN112513312A (en) * | 2018-07-30 | 2021-03-16 | 日本制铁株式会社 | Method for manufacturing hot-dip galvanized steel sheet and method for manufacturing alloyed hot-dip galvanized steel sheet |
| CN110408874A (en) * | 2019-08-31 | 2019-11-05 | 日照宝华新材料有限公司 | A kind of 2.5mm or more thickness hot substrate hot galvanizing sinking roll marks defect control method |
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