CN119216396A - A device and method for preparing magnesium alloy wire - Google Patents
A device and method for preparing magnesium alloy wire Download PDFInfo
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- CN119216396A CN119216396A CN202411664090.4A CN202411664090A CN119216396A CN 119216396 A CN119216396 A CN 119216396A CN 202411664090 A CN202411664090 A CN 202411664090A CN 119216396 A CN119216396 A CN 119216396A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/009—Gas treatment of work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating extruded work or parts of the extrusion press
- B21C29/003—Cooling or heating of work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C31/00—Control devices for metal extruding, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C33/00—Feeding extrusion presses with metal to be extruded ; Loading the dummy block
- B21C33/002—Encapsulated billet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels for metal extruding
- B21C35/02—Removing or drawing-off work
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Abstract
The device for preparing the magnesium alloy wire comprises a heating cabin, an extrusion unit and a wire die, wherein the extrusion unit is arranged in the heating cabin, a blank to be extruded is arranged in the extrusion unit, an outlet is arranged below the extrusion unit, and the wire die is arranged at the outlet below the extrusion unit. The device and the method in the technical scheme are innovative and practical. The device has reasonable design and perfect functions, provides powerful support for the preparation of the magnesium alloy wires, and ensures the high quality and stability of the wires through scientific process flow and strict management and control measures in the method part. The preparation process is expected to have better economic benefits and application prospects in the market.
Description
Technical Field
The invention belongs to the technical field of magnesium alloy wire preparation, and particularly relates to a device and a method for preparing a magnesium alloy wire.
Background
As one of the most important raw materials in high-end application fields such as magnesium alloy welding and 3D printing, the magnesium alloy wires on the market still have the problems of low quality, no definite design standard, poor universality and the like. The processes from the initial raw material to the downstream extrusion drawing and the like are extremely easy to introduce impurities, and the existence of tissue genetic effects can cause a series of problems such as uneven components, oxide inclusion, poor controllability and the like of the final wire. Therefore, the development and the development of the high-quality magnesium alloy wires become a vital link for restricting the development of the magnesium alloy industry.
In the traditional preparation process of the magnesium alloy wire, the magnesium alloy wire is usually subjected to complex processes such as raw material smelting, casting, homogenization treatment, extrusion, drawing, intermediate annealing and the like, and the processes need repeated heating, so that the production cost is greatly increased. If the magnesium alloy thin wire is obtained directly through extrusion, a quite large extrusion ratio is needed, the higher requirement is put on the tonnage of equipment of an extruder, the problem is more obvious on high-strength magnesium alloy containing rare earth or high alloy elements, on the other hand, the thin wire can be prepared through an extrusion and drawing process, but the magnesium matrix sliding system of an hcp crystal structure is less, the plastic deformation capability is weak, the wire is easy to break during room-temperature drawing, the crystal grains of the wire are easy to grow again or oxidize during high-temperature drawing, and the dimensional stability is also possibly reduced. In addition, the conventional magnesium alloy needs to be preheated or homogenized before extrusion, oxides can be generated on the end face of the cast ingot in a high-temperature environment, oxide inclusions are easily introduced in the extrusion process, and the wire lap joint between adjacent cast ingots is also poor, so that the use function of the cast ingot is affected.
The prior measures for improving the components and the performance stability of the magnesium alloy wire are as follows:
(1) And (3) optimizing and designing alloy components:
The strength and the plasticity are improved by introducing Gd and Y elements, and Zr element is also added to purify the matrix so as to reduce the content of impurity elements.
The design of the alloying improves the complexity of an alloy system, the large addition of rare earth elements greatly improves the economic cost, and the existence of Zr elements is not beneficial to obtaining wires with good component uniformity.
(2) Improvement and innovation of forming process:
And continuously carrying out hot drawing for multiple times on the magnesium alloy coarse wire obtained by the previous extrusion, and finally obtaining the filament with the wire diameter as low as 0.5 mm. In addition, thanks to the electro-plastic characteristics of the metal, a pulsed magnetic field is also introduced in the wire drawing device, the generated pulsed current being able to activate the cross-slip, generating the threading dislocation morphology, thus assisting the wire drawing formation at lower temperatures.
However, the first method described above often requires multiple rounds of hot drawing, even 19 passes. The extrusion and drawing processes are usually carried out in an atmospheric environment, and the repeated heating process can cause serious oxidation, so that the product performance of subsequent welding and additive manufacturing is affected. In addition, the introduction of electrolyte and pulse current also causes complexity and instability of the process, and the method is temporarily and frequently found in scientific researches, and is difficult to guide the industrial production of magnesium alloy wires.
Disclosure of Invention
The invention aims to provide a device and a method for preparing a magnesium alloy wire to solve the problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the device for preparing the magnesium alloy wire comprises a heating cabin, an extrusion unit and a wire die, wherein the extrusion unit is arranged in the heating cabin, a blank to be extruded is arranged in the extrusion unit, an outlet is arranged below the extrusion unit, and the wire die is arranged at the outlet below the extrusion unit.
Further, openings are formed in the top and the bottom of the heating cabin, a bottom plate is arranged on the opening of the bottom, and a guide wire inclined plane is formed in the bottom plate.
Further, the extrusion unit comprises an extrusion rod, an extrusion cylinder and a punch, wherein the extrusion rod is arranged in the top opening of the heating cabin and can move up and down in the top opening, the punch is arranged on the extrusion rod, the extrusion cylinder is arranged in the heating cabin, a blank to be extruded is arranged in the extrusion cylinder, and extrusion of the blank to be extruded can be realized when the extrusion rod moves up and down.
Further, the extrusion cylinder is of a cylindrical structure with two open ends, the wire mold is arranged at the bottom of the extrusion cylinder, and the extrusion rod can extend into the extrusion cylinder.
Further, an outer protective sleeve is arranged outside the extrusion cylinder.
Further, a water cooling pipeline is circumferentially arranged on the wire mold, and the water cooling pipeline is externally connected with cooling water.
Further, the upper part of the extrusion cylinder is provided with a side wall inclined hole, and the side wall inclined hole is used for introducing protective gas and arranging an external thermocouple to measure the temperature of the extrusion cylinder.
Further, the position of the side wall inclined hole is higher than that of the outer protective sleeve.
A method of making a magnesium alloy wire comprising the steps of:
homogenizing an as-cast blank to be extruded in a protective gas atmosphere, and after the homogenization treatment is finished, continuing performing hot extrusion pre-deformation treatment on the blank to obtain a pre-deformed blank;
Measuring the temperature of the pre-deformed blank by adopting an external heating couple, and heating the pre-deformed blank to a semi-solid temperature range to obtain a semi-solid blank;
Pushing the extrusion rod, extruding and forming the semi-solid blank, extruding the wire through a wire die provided with a water-cooling sleeve, and guiding out from the inclined surface of the wire.
The method of manufacturing a magnesium alloy wire of claim, wherein the shielding gas is introduced at a flow rate of 5L/min.
Compared with the prior art, the invention has the following technical effects:
The heating cabin provides a controllable temperature environment for the whole extrusion process, ensures that the magnesium alloy blanks can be extruded at a proper temperature, and is important for semi-solid extrusion forming. The design of the openings at the top and the bottom is convenient for loading the blanks and guiding out the wires, and meanwhile, the design of the bottom plate and the guide wire inclined surface on the bottom opening is beneficial to smooth guiding out of the wires, so that friction and resistance are reduced.
The extrusion unit comprises the extrusion rod, the extrusion barrel and the punch, and the extrusion process is more stable and controllable by the design. The extrusion rod can move up and down in the top opening, and the blank is extruded through the punch, so that the accurate control of the blank is realized. The extrusion cylinder is of a cylindrical structure with two open ends, so that the blank is conveniently put in and extruded wires are conveniently guided out.
The wire mould is arranged at the bottom of the extrusion cylinder, so that the extruded wire is ensured to have the required shape and size. The circumferentially arranged water cooling pipelines can rapidly cool extruded wires, and deformation or defects caused by high temperature are avoided. The design of the inclined holes on the side wall is convenient for introducing protective gas and arranging an external heating couple, thereby protecting the blank from oxidization and monitoring the temperature in the extrusion barrel in real time.
The invention performs homogenization treatment in the protective gas atmosphere, avoids the blank from being oxidized in the heating process, and ensures the purity of the blank.
The pre-deformation treatment can eliminate the internal stress in the blank and improve the extrudability of the blank. Through the pre-deformation treatment, the structure of the blank becomes more uniform, which is beneficial to the subsequent extrusion forming. The semi-solid extrusion molding utilizes the characteristic of small deformation resistance of the magnesium alloy in semi-solid state, and reduces the force and energy consumption required by extrusion. Semi-solid extrusion can maintain the tissue uniformity of the blank and improve the performance and stability of the wire.
The full-inert atmosphere environment control of the full flow of the invention avoids the oxidation of the blank and the wire in the processing process, and ensures the purity and the performance of the wire. The control mode also reduces the generation of oxide inclusions and improves the uniformity of the tissue and mechanical properties of the wire.
Compared with the traditional extrusion-drawing process, the method is fully simplified, and the energy consumption and the production cost are greatly reduced. The characteristics of short process and good continuity improve the production efficiency and meet the market demand for high-quality magnesium alloy wires.
In summary, the device and the method in the technical scheme are innovative and practical. The device has reasonable design and perfect functions, provides powerful support for the preparation of the magnesium alloy wires, and ensures the high quality and stability of the wires through scientific process flow and strict management and control measures in the method part. The preparation process is expected to have better economic benefits and application prospects in the market.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 is a schematic diagram of a semi-solid extruded wire of magnesium alloy.
FIG. 3 is a heat treatment roadmap for magnesium alloy billets.
FIG. 4A is a comparison of extruded wire morphology for AZ80A case 1 (a) and comparative example 1 (b).
FIG. 5 diameter statistics of AZ80A case 1 wire
FIG. 6AZ80A shows the (a) surface of the wire obtained in case 1 and (b) core microstructure.
1-Extrusion rod, 2-heating cabin, 3-extrusion cylinder, 4-water cooling pipeline, 5-wire guiding inclined plane, 6-wire mold, 7-outer protective sleeve, 8-sidewall inclined hole and 9-punch.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
Referring to fig. 1, the invention provides an apparatus for preparing a magnesium alloy wire, which comprises a heating chamber 2, an extrusion unit and a wire die 6, wherein the extrusion unit is arranged in the heating chamber 2, a blank to be extruded is arranged in the extrusion unit, an outlet is arranged below the extrusion unit, and the wire die 6 is arranged at the outlet below the extrusion unit.
The device integrates the heating chamber, the extrusion unit and the wire mould together, resulting in a compact production system. The integrated design not only saves space, but also reduces the transfer time of materials among different devices and improves the production efficiency. Due to the high integration of the device, operators can monitor and adjust the production process more conveniently, and the operation difficulty and complexity are reduced.
The heating chamber provides a stable temperature environment for the extrusion process. By precisely controlling the temperature of the heating cabin, the blank can be ensured to reach a required semi-solid temperature interval before extrusion, thereby improving the quality and stability of extrusion forming. The integrated design reduces temperature fluctuation of the blank in the transfer process, avoids tissue change caused by temperature change, and further ensures the performance consistency of the wire.
The design of the extrusion unit makes the extrusion process more controllable. By adjusting the moving speed and the pressure of the extrusion rod, the deformation degree and the extrusion speed of the blank can be precisely controlled, so that the wire with the required shape and size can be obtained. The wire mould is arranged at the outlet below the extrusion unit, so that extruded wires can be ensured to directly enter the mould for forming. The precise positioning design improves the forming precision and the surface quality of the wire.
The device improves the production efficiency through the design of integration and accurate control. Meanwhile, the material transferring and waiting time is reduced, so that the production period is further shortened.
The device simplifies the post-drawing treatment flow in the traditional wire preparation process and reduces the production cost. In addition, as the continuity and dimensional stability of the wire are improved, the rejection rate and the subsequent processing cost are reduced.
In summary, the device for preparing the magnesium alloy wire provided by the invention has multiple technical effects of integration and compactness, temperature control accuracy, controllability of an extrusion process, production efficiency, cost effectiveness, stability and reliability of product quality and the like. The technical effects together form innovation points and competitive advantages of the device, and an efficient, stable and economic solution is provided for preparing the magnesium alloy wires.
Embodiment 2 the invention provides a device for preparing magnesium alloy wires, which specifically comprises a cross-section view of the device for semi-solid extrusion of magnesium alloy, wherein the cross-section view is shown in fig. 1, and the device is formed by assembling 9 parts in total. Wherein, the lower end of the extrusion rod 1 is connected with a punch 9 by using a bolt for directly contacting and extruding the magnesium alloy. A heating cabin 2 with resistance wires is arranged inside. The extrusion cylinder 3 is a position for placing the precompressed blank, and is divided into an upper part and a lower part, the middle part is formed by adopting bolt connection, and a space for placing a wire mould 6 is reserved. In addition, a circle of water-cooling pipeline 4 capable of placing a circular ring copper pipe is processed on the periphery of the die, a guide wire inclined plane 5 is arranged to facilitate the smooth output of the wire extruded vertically downwards along the horizontal direction, an outer protective sleeve 7 is a cylindrical protective sleeve made of 45 steel, and a side wall inclined hole 8 capable of being extended into a heating couple and a protective gas pipeline is processed. All devices except the outer protective sheath 7 were made of H13 die steel.
The working principle of the device is that the whole device is heated up to a preset temperature under the action of the heating cabin 2. Then, protective gas is introduced for a period of time, so that the internal air is removed as completely as possible, then, the blank after homogenization treatment and precompaction is transferred into the extrusion cylinder 3, and the extrusion can be started after the temperature of the blank reaches the preset temperature for a period of time. Under the pushing of the extrusion rod 1, the punch 9 continuously acts on the blank, the semi-solid magnesium alloy starts to be extruded downwards through the small hole of the wire die 6, after contacting the wire guide inclined plane 5, the semi-solid magnesium alloy is manually pulled, the output direction of the semi-solid magnesium alloy is changed to be horizontal, and the semi-solid magnesium alloy is wound into a disc or sheared into strips at the end to finish extrusion. In the case of low-temperature extrusion or solidification molding of a magnesium alloy wire, the water-cooled pipeline 4 may not be used for accelerated cooling.
Example 3, a method for preparing a magnesium alloy wire, the invention takes Mg-Al series AZ80A magnesium alloy as an example (GB/T5153-2016, mg- (7.8-9.2) Al- (0.2-0.8) Zn- (0.15-0.50) Mn (wt.%)), and the wire preparation under the full-flow atmosphere protection is realized by the technical scheme as shown in fig. 2:
(1) Semi-solid billet pre-deformation treatment
Before semi-solid hot extrusion, homogenizing the as-cast blank (at 410 ℃ for 10-12 h) to eliminate component segregation and internal stress in the blank. After the homogenization treatment is completed, the blank is continuously subjected to hot extrusion pre-deformation treatment.
The extrusion process is adopted, so that the method is an efficient and controllable strain-inducing mode, and the microstructure of the semi-solid blank can be improved in the subsequent semi-solid heating process through deformation energy storage accumulated by plastic deformation. On one hand, the growth rate of blank grains is limited, so that the material grains are prevented from growing rapidly, and on the other hand, the method can promote the generation of more liquid phases, further promote the roundness and the distribution uniformity of solid phase particles and is beneficial to the thixotropic forming process.
In the process, high-purity argon is continuously introduced into the whole system, and the flow is set to be 5L/min.
(2) Semi-solid hot extrusion forming
The temperature of the ingot is measured by an external heating couple, and the pre-deformed blank is heated to a semi-solid temperature range (taking AZ80 magnesium alloy as an example, the semi-solid temperature range is about 480-580 ℃, and the tissue liquid phase ratio can reach 30-50% vol%).
The semi-solid AZ80A is extruded and formed by adopting an extrusion rod pushing method, the inner diameter phi of an extrusion chamber is 65, the number of filament outlets is 8, the filament diameter phi is 3.5, the extrusion ratio is about 43, the extrusion speed is 8 mm/min, the extrusion filament is provided with a water cooling sleeve for accelerated cooling, and a filament guiding device is assisted.
Example 4, taking AZ80A magnesium alloy as an example (GB/T5153-2016, mg- (7.8-9.2) Al- (0.2-0.8) Zn- (0.15-0.50) Mn (wt.%)):
(1) Semi-solid extrusion billet pre-deformation treatment
And carrying out homogenization treatment (410 ℃ for 10-12 hours) on the as-cast blank before semi-solid hot extrusion, and eliminating component segregation and internal stress in the blank. After the homogenization treatment is finished, transferring the blank to an extruder for hot extrusion pre-deformation treatment, wherein the extrusion temperature is 300-350 ℃, and the extrusion ratio is 10:1-20:1. The extrusion process is adopted, so that the method is an efficient and controllable strain induction mode, and the microstructure of the semi-solid blank can be improved in the subsequent semi-solid heating process through deformation energy storage accumulated by plastic deformation. On one hand, the growth rate of blank grains is limited, so that the material grains are prevented from growing rapidly, and on the other hand, the method can promote the generation of more liquid phases, further promote the roundness and the distribution uniformity of solid phase particles and is beneficial to the thixotropic forming process.
The pretreatment and extrusion processes are carried out by adopting high-purity argon to continuously feed, and the flow is set to be 5L/min.
(2) Semi-solid hot extrusion forming
The die of the extrusion chamber is raised to 500 ℃ in advance to keep the temperature at 2h before placing the pre-deformation treatment blank. And (3) placing the pre-deformed blank into an extrusion chamber for heating, and starting extrusion when the temperature of the blank is detected to be increased to a target semi-solid state interval (480-500 ℃) by using a thermocouple. The semi-solid AZ80A is extruded and formed by adopting an extrusion rod pushing method, the extrusion chamber has an inner diameter phi 65, the number of filament outlets is set to 8, the filament diameter phi is 3.5, the extrusion ratio is about 43, and the extrusion speed is 8 mm/min. The extrusion wire is cooled by a water-cooling sleeve in an accelerating way, and a wire guiding inclined plane is arranged at the lower end of a wire outlet of the die so as to ensure that the wire is smoothly pushed out from the transverse direction.
(3) Thermal history map
Fig. 3 is a diagram summarizing the heat treatment route of the billet from homogenization, pre-deformation to final extrusion of the wire, taking AZ80A magnesium alloy as an example. Wherein Tm and Tα are the melting point of the magnesium alloy and the temperature at which α -Mg begins to melt, respectively. And after homogenization treatment and pre-extrusion deformation are completed, continuously heating the treated blank to a semi-solid extrusion temperature zone with a certain liquid phase volume fraction so as to carry out a final extrusion wire-outlet flow.
(4) Wire comparison
The wire morphology pairs of the present case extruded wire and comparative example 1 (conventionally extrusion-drawn processed) are shown in fig. 4. It is easy to see that the appearance of the AZ80A wire obtained by semi-solid extrusion forming provided by the invention is basically consistent with that of the traditional extrusion-drawing method. The wire has good continuity, does not have large bending distortion or fracture, has good surface smoothness, and does not find defects such as hot cracking, oxidization and the like.
Because 3 wires are short in wire outlet, 5 wires with relatively uniform wire diameters are drawn in fig. 5, the wire diameters are uniform and are concentrated in the range of 3.3-3.4 mm, and the diameter fluctuation of a single wire is not more than +/-70 mu m, so that the wire diameter uniformity obtained by the method is good.
FIG. 6 shows the microstructure of the resulting wire, where the original liquid phase is more present at the grain boundary sites and the circularity of the grains is higher due to the pre-compression process when the wire is extruded in a semi-solid warm zone. The deformation of the surface layer of the wire material and the friction force of the inner wall of the die in the extrusion process are the largest, and the wire material is in direct contact with air, so that the wire material has better cooling conditions, crystal grains are in typical deformation state crystal grain structure characteristics (a), the content of the second phase is also less, the deformation of the core part is small, the heat dissipation conditions are poor, the second phase is more completely separated out, and the developed and compact solidification dendrite (b) is shown.
The method realizes low-cost and short-process preparation of the magnesium alloy wire difficult to extrude through thixotropic forming, has good continuity, can ensure wire discharge without break points in theory if extrusion blanks are enough and devices are large enough, ensures stability of welding and additive manufacturing processes, and is applicable to magnesium alloys such as AZ, WE and VW systems;
The invention aims at thixotropic forming of the semisolid magnesium alloy, and compared with the traditional extrusion, the thermoplastic deformation resistance of the semisolid magnesium alloy is reduced by an order of magnitude, so that the production efficiency is greatly improved, and the heavy pressure for equipment upgrading is reduced;
The wire preparation process is fully simplified, the energy consumption and the production cost are greatly reduced, and the method meets the industrial requirements of solving the problems of multiple processes and high processing cost in the existing industrial production;
the wire preparation link adopts full inert atmosphere protection, avoids air oxidation caused by direct contact between the traditional drawing process and the outside environment, avoids oxidation inclusion of the wire, and is beneficial to improving the accuracy of the diameter of the wire due to better formability of semi-solid raw materials;
The magnesium alloy wire is extruded in a solid-liquid two-phase temperature interval, and the ingot is subjected to a component homogenization process at the temperature, so that adverse effects of segregation of alloy elements in the original ingot on wire components and performances can be eliminated, and the magnesium alloy wire with excellent and stable performances can be obtained.
Finally, it should be noted that the above embodiments are only 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 modifications and equivalents may be made to the specific embodiments of the present invention without departing from the spirit and scope of the present invention, and any modifications and equivalents are intended to be included in the scope of the claims of the present invention.
Claims (10)
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