CN117467903A - High-performance cast steel roll and preparation method thereof - Google Patents
High-performance cast steel roll and preparation method thereof Download PDFInfo
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- CN117467903A CN117467903A CN202311333806.8A CN202311333806A CN117467903A CN 117467903 A CN117467903 A CN 117467903A CN 202311333806 A CN202311333806 A CN 202311333806A CN 117467903 A CN117467903 A CN 117467903A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/03—Sleeved rolls
- B21B27/032—Rolls for sheets or strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/061—Materials which make up the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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Abstract
The invention discloses a high-performance cast steel roller, the roller body of which is made of chromium-manganese cast iron alloy, and the main chemical components of the roller comprise C, si, mn, cr, mo, V, al, P, S and the balance of Fe. The high-performance roller provided by the invention is used on a hot-rolled strip steel rolling mill, the roller has no peeling, cracking and roller breakage phenomena, the millimeter steel passing amount of the roller is increased by more than 4 times than that of a high-chromium cast iron roller under the same use condition, the cost is reduced by more than 50% compared with that of the conventional common steel roller, and the high-performance roller has a good use effect. The invention is suitable for strip steel rolling production lines and is used for strip steel production and manufacturing.
Description
Technical Field
The invention belongs to the technical field of roller manufacturing, and relates to a roller, in particular to a high-performance cast steel roller and a preparation method thereof.
Background
In the steel rolling production, the roller is very widely used, and is frequently replaced and large in dosage. Because the working conditions of the roller are very severe, the roller is required to bear the influence of high temperature, thermal shock, high-speed friction and abrasion and other factors of the rolled section for a long time, and the roller made of traditional materials (such as high-chromium cast iron, spheroidal graphite cast iron, nickel hard cast iron, high alloy steel and the like) is often failed due to abrasion, steel sticking and the like. High chromium cast iron and nickel hard cast iron have high hardness and good wear resistance, but fracture occurs due to high brittleness of the material. The wear resistance and the thermal shock resistance of the spheroidal graphite cast iron are poor, and the spheroidal graphite cast iron cannot meet the use requirements and is eliminated. The high alloy steel has high hardness at room temperature, but annealing phenomenon occurs at high temperature, and wear resistance is greatly reduced since the material itself does not have a hard phase of high hardness.
The Chinese patent No. 1854328 discloses an improved composite high-chromium cast iron roller, which is characterized in that the working layer of the roller comprises the following components: 2.5-3.0%, si: 0.5-1.2%, mn: 0.6-1.2%, V: l.0-1.5%, cr: 12-20%, mo: 0.5-3.5%, V: 0.05-0.5%, AL: 0.2-1.5%, al: 0.03-0.3%, N: 0.03-0.1%, P: less than or equal to 0.04 percent, S: less than or equal to 0.04 percent, the balance of iron and impurities, and after heat treatment, the structure mainly comprises tempered martensite with high surface hardness, carbide and a small amount of residual austenite, thereby effectively reducing the hardness non-uniformity of a working layer, and the hardness non-uniformity of a roller working layer is less than 3HSD. Chinese patent No. CN101015836 also discloses cast high-chromium iron or cast high-chromium steel rolls for welded steel pipes, the cast high-chromium iron rolls comprising the following components in weight percent: c: 1.8-2.8%, si: less than or equal to 1.0 percent, mn: less than or equal to 1.0 percent, P: less than or equal to 0.05 percent, S: less than or equal to 0.05 percent, cr: 12-22%, V: 0.5-3.0%, mo: 0.8-3.0%, ti: 0-0.3%, V: 0-1.0%, cu: 0-1.0%, re: 0.01-0.5%, and the balance being Fe; the invention adopts high chromium iron or high chromium steel and adopts casting technology to produce, the material structure of the roller product is uniform, the wear resistance and toughness are greatly improved, and the casting molding is adopted, so that the processing procedures are shortened, the processing amount is reduced, and the material utilization rate can reach 70 percent, even 80 percent. Japanese patent JP 58116911-A and JP 86016334-B disclose a high chromium white cast iron composite roll, the outer layer of which contains C: 2.0-3.2%, si: 0.5-1.5%, mn: 0.5-1.5%, P: <0.08%, S: <0.06%, V:1.0 to 2.0%, cr: 10-25%, mo: 0.5-1.5%, the balance being Fe, and the roller hardness is Hs: 70-80 parts. U.S. Pat. No. 3,182,62,A also discloses a high chromium white cast iron roll having the chemical composition C: 2.4-3.8%, mn: 0.4-2%, si: 0.2-1.9%, cu: 0-3%, V: 1.5-4.5%, cr: 12-29%, and the balance being Fe. The high-chromium cast iron roller material contains more metal elements such as molybdenum, nickel and the like, and the price of the metal elements such as molybdenum, nickel and the like is higher, so that the production cost is higher.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a high-performance roller and a preparation method thereof, so as to achieve the purposes of improving the abrasion resistance of the roller, reducing the content of noble metals and further reducing the production cost.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the main chemical components of the working layer of the high-performance cast steel roller comprise: c: 0.65-0.75%; si: 0.4-0.8%; mn: 0.4-0.9%; p: less than or equal to 0.035 percent; s: less than or equal to 0.035 percent; cr: 14-16%; mo: 0.5-0.9%; v: 0.2-0.6%; AL: 0.4-0.7%; the balance being Fe;
carbon forms alloy carbide with alloy elements such as vanadium, tungsten, molybdenum, chromium and the like, and is solid-dissolved in a roller matrix structure. Although the content, hardness and wear resistance of the carbide of the alloy material are increased along with the increase of excessive carbon, the brittleness is increased along with the increase of the carbide due to the fact that the carbide has a cutting effect on a roller matrix, and the impact toughness of the roller is reduced;
silicon has higher affinity with oxygen than manganese and chromium, is an indispensable deoxidizing element in the smelting process, has higher solid solution strengthening effect on a roller matrix, and has the tendency of enriching silicon at the front of carbide crystallization in the solidification process, thereby having the effect of changing the form of carbide;
manganese has the advantages of reducing eutectoid transformation temperature, expanding austenite region, increasing austenite stability, and when manganese content is 5% -7%, the roller matrix is mainly austenite; the austenite engine oil has the effects of work hardening, so that the surface hardness of the roller is increased, the wear resistance of the roller is improved, and the roller has good toughness;
chromium and carbon mainly form chromium carbide, which is helpful for improving the hardness, wear resistance, corrosion resistance, high temperature oxidation resistance and other performances of the material.
Vanadium carbide is firstly separated out from molten metal along with the reduction of temperature in the solidification process, and the vanadium carbide has small cutting effect on a roller matrix, so that the impact toughness of the material is improved;
molybdenum mainly exists in the roller as molybdenum carbide and is dissolved into chromium carbide and a roller matrix, and the molybdenum has the effects of improving the hardness, high-temperature strength, thermal fatigue resistance, oxidation resistance and the like of the roller matrix;
aluminum is a good steelmaking deoxidizer, can improve the fluidity of molten steel, and reduces gas and impurities in the steel; the addition of aluminum can spheroidize oxide inclusions, stably adsorb the oxide inclusions in slag, and achieve the purpose of purifying molten steel, but the addition of excessive aluminum can affect the hardness of the roller, so that the hardness of the roller is reduced.
Preferably, the working layer of the high-performance cast steel roller comprises the following main chemical components: c:0.7%; si:0.63%; mn:0.5%; p:0.03%; s:0.026%; cr:13%; mo:0.9%; v:0.2%; AL:0.5%; the balance being Fe;
the invention also provides a preparation method of the high-performance cast steel roller, which comprises the following steps:
the method comprises the following steps:
s1, after preparing raw steel according to the chemical component content, placing the raw steel into a medium-frequency induction furnace, and mixing, heating and melting; after all the raw steel is melted, heating to 1657-1663 ℃ after melting, preserving heat for 4-5 minutes, and discharging to a pouring ladle;
s2, after standing and slag skimming of molten steel in a pouring ladle, pouring the molten steel into a casting mold rotating at a high speed when the temperature of the molten steel is reduced to 1422-1437 ℃, wherein the rotation speed of the casting mold is 750-850 rpm, the temperature of the casting mold is 200-230 ℃, and a zircon powder coating with the thickness of 1.5-2.8 mm is coated in the casting mold; the chemical composition and mass fraction of the casting mold are as follows: c0.21-0.28%; si 0.31-0.39%; mn is 0.26-0.37%; mo is 0.17-0.24%; ni is 1.55-1.70%; cr is 0.66-0.75%; 0.043-0.084% of Ti; o is less than or equal to 12ppm; n is less than or equal to 60ppm; h is less than or equal to 1.0ppm; ce 0.027-0.043%; la 0.015-0.038%; b0.002-0.005%; 0.008-0.014% of Al; v is 0.15-0.22%; s <0.025%; p is less than 0.030%, and the balance is Fe; the wall thickness of the casting mold is 150-220 mm; after molten steel fully enters a casting mould, the rotating speed of the casting mould is increased to 1080-1120 rpm, the casting mould is cooled by spraying water for 8-10 minutes, the surface temperature of the casting mould is controlled below 280 ℃, and after the molten steel is fully solidified, the roll sleeve is stopped and taken out, so as to obtain a steel roll sleeve blank;
s3, after rough machining, heating the steel roller sleeve blank to 1050-1080 ℃ along with a furnace, preserving heat for 4-6 hours, discharging, cooling to 520-560 ℃ by air cooling, and naturally cooling to 400-450 ℃ by stopping air cooling; continuously feeding the materials into a furnace to heat to 510-550 ℃, preserving heat for 8-10 hours, discharging the materials from the furnace to air cool to 80-100 ℃; heating to 500-530 ℃ again, preserving heat for 10-12 hours, cooling to 350-390 ℃ and discharging, and carrying out interference fit with the high-strength medium-carbon low-alloy steel roller core into a whole by hot charging, wherein the interference is 0.12-0.15 mm; and finally, finishing to the specified size and precision, and obtaining the high-performance cast steel roller.
Preferably, the method comprises the steps of,
s1, after preparing raw steel according to the chemical component content, placing the raw steel into a medium-frequency induction furnace, and mixing, heating and melting; after all the raw steel is melted, heating to 1660 ℃ after melting, keeping the temperature for 4-5 minutes, and discharging to a pouring ladle;
s2, after standing and slag skimming of molten steel in a pouring ladle, pouring the molten steel into a casting mold rotating at a high speed when the temperature of the molten steel is reduced to 1430 ℃, wherein the rotation speed of the casting mold is 800rpm, the temperature of the casting mold is 210 ℃, and the casting mold is coated with zircon powder coating with the thickness of 2 mm; the chemical composition and mass fraction of the casting mold are as follows: c0.24%; si 0.39%; mn 0.29%; mo 0.22%; ni 1.64%; cr 0.71%; ti 0.059%; o is less than or equal to 12ppm; n is less than or equal to 60ppm; h is less than or equal to 1.0ppm; ce 0.034%; la 0.026%; b0.004%; al 0.01%; v0.18%; s <0.025%; p is less than 0.030%, and the balance is Fe; the thickness of the casting mould is 200mm; after molten steel completely enters a casting mould, the rotation speed of the casting mould is increased to 1100rpm, and the casting mould is cooled by spraying water for 8-10 minutes, so that the surface temperature of the casting mould is controlled below 280 ℃, and after the molten steel is completely solidified, the roll sleeve is stopped and taken out, so as to obtain a steel roll sleeve blank;
s3, after rough machining, heating the steel roller sleeve blank to 1060 ℃ along with a furnace, preserving heat for 4-6 hours, discharging, cooling to 550 ℃, stopping cooling, and naturally cooling to 450 ℃; continuously feeding into a furnace to heat to 520 ℃, preserving heat for 8-10 hours, discharging from the furnace, and air-cooling to 100 ℃; heating to 500 ℃ again, preserving heat for 10-12 hours, cooling to 370 ℃, discharging, and carrying out interference fit with a high-strength medium-carbon low-alloy steel roller core into a whole by hot charging, wherein the interference is 0.12-0.15 mm; and finally, finishing to the specified size and precision, and obtaining the high-performance cast steel roller.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) The high-performance roller core provided by the invention can be recycled, is beneficial to energy conservation and consumption reduction of roller production, and reduces the maintenance cost of the roller.
(2) The high-performance roller provided by the invention is used on a hot-rolled strip steel rolling mill, the roller has no peeling, cracking and roller breakage phenomena, the millimeter steel passing amount of the roller is increased by more than 4 times than that of a high-chromium cast iron roller under the same use condition, the cost is reduced by more than 50% compared with that of the conventional common steel roller, and the high-performance roller has a good use effect.
The invention is suitable for strip steel rolling production lines and is used for strip steel production and manufacturing.
Drawings
FIG. 1 is a schematic diagram of a high performance cast steel roll;
FIG. 2 is a metallographic electron microscope image of the working surface of the high-performance cast steel roller.
Wherein 1 represents a high-performance cast steel roll sleeve; 2 represents a high strength medium carbon low alloy steel roll core.
Detailed Description
Preferred embodiments of the present invention are described below. It should be understood that the preferred embodiments described herein are presented for purposes of illustration and understanding only, and are not intended to limit the invention.
Example 1A high Performance cast steel roll
The main chemical components of the high-performance cast steel roller provided by the embodiment comprise C:0.7%; si:0.63%; mn:0.5%; p:0.03%; s:0.026%; cr:13%; mo:0.9%; v:0.2%; al:0.5%; the balance being Fe;
the manufacturing method of the roller body comprises the following steps:
s1, after preparing raw steel according to the chemical component content, placing the raw steel into a medium-frequency induction furnace, and mixing, heating and melting; after all the raw steel is melted, heating to 1660 ℃ after melting, keeping the temperature for 4-5 minutes, and discharging to a pouring ladle;
s2, after standing and slag skimming of molten steel in a pouring ladle, pouring the molten steel into a casting mold rotating at a high speed when the temperature of the molten steel is reduced to 1430 ℃, wherein the rotation speed of the casting mold is 800rpm, the temperature of the casting mold is 210 ℃, and the casting mold is coated with zircon powder coating with the thickness of 2 mm; the chemical composition and mass fraction of the casting mold are as follows: c0.24%; si 0.39%; mn 0.29%; mo 0.22%; ni 1.64%; cr 0.71%; ti 0.059%; o is less than or equal to 12ppm; n is less than or equal to 60ppm; h is less than or equal to 1.0ppm; ce 0.034%; la 0.026%; b0.004%; al 0.01%; v0.18%; s <0.025%; p is less than 0.030%, and the balance is Fe; the thickness of the casting mould is 200mm; after molten steel completely enters a casting mould, the rotation speed of the casting mould is increased to 1100rpm, and the casting mould is cooled by spraying water for 8-10 minutes, so that the surface temperature of the casting mould is controlled below 280 ℃, and after the molten steel is completely solidified, the roll sleeve is stopped and taken out, so as to obtain a steel roll sleeve blank;
s3, after rough machining, heating the steel roller sleeve blank to 1060 ℃ along with a furnace, preserving heat for 4-6 hours, discharging, cooling to 550 ℃, stopping cooling, and naturally cooling to 450 ℃; continuously feeding into a furnace to heat to 520 ℃, preserving heat for 8-10 hours, discharging from the furnace, and air-cooling to 100 ℃; heating to 500 ℃ again, preserving heat for 10-12 hours, cooling to 370 ℃, discharging, and rapidly loading a high-strength medium-carbon low-alloy steel roller core when the roller sleeve is heated and expanded, so that the roller sleeve and the roller core are in interference fit together, wherein the interference is 0.12-0.15 mm; and finally, finishing to the specified size and precision, and obtaining the high-performance cast steel roller.
Example 2A high Performance cast steel roll
The high-performance cast steel roller provided in this embodiment is basically the same as that in embodiment 1, and differs only in the chemical composition of the roller body, and in this embodiment, the main chemical composition of the roller body includes: c: 0.75%; si:0.4%; mn: 0.9%; p:0.005%; s:0.035%; cr:14%; mo:0.9%; v:0.6%; al:0.4%; the balance being Fe.
Example 3A high Performance cast steel roll
The high-performance cast steel roller provided in this embodiment is basically the same as that in embodiment 1, and differs only in the chemical composition of the roller body, and in this embodiment, the main chemical composition of the roller body includes: c:0.65%; si:0.8%; mn:0.4%; p: 0.035%; s:0.015%; cr:16%; mo:0.5%; v:0.2%; al:0.7%; the balance being Fe.
Example 4A high Performance cast steel roll
The high-performance cast steel roller provided in this embodiment is basically the same as that in embodiment 1, and differs only in the chemical composition of the roller body, and in this embodiment, the main chemical composition of the roller body includes: c:0.73%; si:0.43%; mn:0.72%; p:0.01%; s:0.005%; cr:15%; mo:0.67%; v:0.51%; al:0.61%; the balance being Fe.
Effect example
The tensile strength, yield strength and hardness of the high-performance rolls obtained by processing the examples 1 to 4 are measured, and two cast iron rolls with the same specification on the market at present are selected as a comparative example 1 and a comparative example 2, wherein the comparative example 1 is a roll produced by Hengde intelligent technology (tin-free) Co., ltd; comparative example 2 is a roll manufactured by zheng state constant mass heavy machinery manufacturing limited company, and the measurement results are compared with comparative examples 1 to 2, and specific data are shown in table 1:
table 1 high performance roll performance comparison
| Item group | Roll surface hardness/HSD | Roll surface hardness differential/HSD | Tensile strength/MPa | Impact toughness/J.cm ~2 |
| Example 1 | 87.2 | 0.9 | 993 | 30.4 |
| Example 2 | 84.4 | 1.3 | 986 | 28.7 |
| Example 3 | 85.5 | 1.2 | 981 | 29.4 |
| Example 4 | 83.8 | 1.4 | 979 | 27.2 |
| Comparative example 1 | 82.4 | 1.8 | 942 | 21.0 |
| Comparative example 2 | 80.2 | 2.1 | 951 | 20.6 |
By analyzing the roll surface hardness, the roll surface hardness difference, the tower resistance strength and the impact toughness of the high-performance roll, the component proportion and the method provided by the embodiment of the invention are obtained, the roll surface hardness difference, the tower resistance strength and the impact toughness of the obtained roll are improved to a certain extent, and particularly, the high-performance roll performance parameter data provided in the embodiment 1 are optimal, so that the high-performance roll and the preparation method thereof provided by the invention not only reduce the content of precious metal elements in the component, but also reduce the self performance without reverse lifting under the condition that the roll body is fused and cast into a whole by the original component, and have obvious improvement on various indexes.
It should be noted that the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but the present invention is described in detail with reference to the foregoing embodiment, and it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a high performance cast steel roll which characterized in that: the roll body of the roll is made of chromium-manganese cast iron alloy, and the main chemical components of the roll comprise C:0.65% -0.75%; si:0.4% -0.8%; mn:0.4% -0.9%; p: less than or equal to 0.035 percent; s: less than or equal to 0.035 percent; cr:14% -16%; mo:0.5% -0.9%; v:0.2% -0.6%; al:0.4% -0.7%; the balance being Fe.
2. The high performance cast steel roll as claimed in claim 1 wherein: the roll body of the roll is made of chromium-manganese cast iron alloy, and the main chemical components of the roll comprise C:0.7%; si:0.63%; mn:0.5%; p:0.03%; s:0.026%; cr:13%; mo:0.9%; v:0.2%; al:0.5%; the balance being Fe.
3. A method of producing the high-performance cast steel roll according to claim 1 or 2, characterized in that: the preparation method comprises the following steps:
s1, after preparing raw steel according to the chemical component content, placing the raw steel into a medium-frequency induction furnace, and mixing, heating and melting; after the raw steel is completely melted, heating to 1657-1663 ℃, preserving heat for 4-5 minutes, and discharging to a pouring ladle;
s2, after standing and slag skimming of molten steel in a pouring ladle, pouring the molten steel into a casting mould rotating at a high speed when the temperature of the molten steel is reduced to 1422-1437 ℃, after the molten steel completely enters the casting mould, increasing the rotating speed, spraying water to cool the casting mould for 8-10 minutes, controlling the surface temperature of the casting mould to be below 280 ℃, stopping taking out a roller sleeve after the molten steel is completely solidified, and obtaining a steel roller sleeve blank;
s3, after rough machining, heating the steel roller sleeve blank along with a furnace, preserving heat for 4-6 hours, and discharging and cooling; continuously feeding the materials into a furnace to heat to 510-550 ℃, preserving heat for 8-10 hours, discharging the materials from the furnace to air cool to 80-100 ℃; heating to 500-530 ℃ again, preserving heat for 10-12 hours, cooling to 350-390 ℃ and discharging, and carrying out interference fit with the high-strength medium-carbon low-alloy steel roller core into a whole by hot charging, wherein the interference is 0.12-0.15 mm; and finally, finishing to the specified size and precision, and obtaining the high-performance cast steel roller.
4. A method of preparation according to claim 3, characterized in that: the chemical composition and mass fraction of the casting mould in S2 are as follows: c0.21-0.28%; si 0.31-0.39%; mn is 0.26-0.37%; mo is 0.17-0.24%; ni is 1.55-1.70%; cr is 0.66-0.75%; 0.043-0.084% of Ti; o is less than or equal to 12ppm; n is less than or equal to 60ppm; h is less than or equal to 1.0ppm; ce 0.027-0.043%; la 0.015-0.038%; b0.002-0.005%; 0.008-0.014% of Al; v is 0.15-0.22%; s <0.025%; p is less than 0.030%, and the balance is Fe; and the wall thickness of the casting mold is 150-220 mm.
5. A method of preparation according to claim 3, characterized in that: s2, rotating speed is 750-850 rpm when molten steel is poured into a casting mold, casting mold temperature is 200-230 ℃, and zircon powder coating with thickness of 1.5-2.8 mm is coated in the casting mold; and the rotational speed of the casting mould is 1080-1120 rpm after the molten steel is completely injected into the casting mould.
6. The preparation method according to any one of claims 3 to 5, characterized in that: and S3, heating at 1050-1080 ℃.
7. The method of manufacturing according to claim 6, wherein: and S3, discharging and cooling, namely firstly air-cooling the roller sleeve of the roller sleeve to 450-560 ℃, and then naturally cooling to 400-460 ℃ after stopping air.
8. The method of manufacturing according to claim 6, wherein: and S3, discharging and air cooling at 380-450 ℃.
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Citations (5)
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|---|---|---|---|---|
| JP2007125562A (en) * | 2005-11-01 | 2007-05-24 | Hitachi Metals Ltd | Composite roll for rolling |
| CN103993220A (en) * | 2014-05-14 | 2014-08-20 | 邢台正锟机械轧辊有限公司 | Hypoeutectic high-chromium white cast iron roller and preparation method thereof |
| CN104593691A (en) * | 2014-12-26 | 2015-05-06 | 中钢集团邢台机械轧辊有限公司 | Roller sleeve for large forged alloy steel carrying roller and manufacturing method thereof |
| CN110290881A (en) * | 2017-02-08 | 2019-09-27 | 日立金属株式会社 | Composite roll for rolling and method for producing the same |
| CN115945259A (en) * | 2023-01-18 | 2023-04-11 | 东北大学 | A deep-groove stress-releasing bimetallic composite roll sleeve and its preparation method and application |
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2023
- 2023-10-16 CN CN202311333806.8A patent/CN117467903A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007125562A (en) * | 2005-11-01 | 2007-05-24 | Hitachi Metals Ltd | Composite roll for rolling |
| CN103993220A (en) * | 2014-05-14 | 2014-08-20 | 邢台正锟机械轧辊有限公司 | Hypoeutectic high-chromium white cast iron roller and preparation method thereof |
| CN104593691A (en) * | 2014-12-26 | 2015-05-06 | 中钢集团邢台机械轧辊有限公司 | Roller sleeve for large forged alloy steel carrying roller and manufacturing method thereof |
| CN110290881A (en) * | 2017-02-08 | 2019-09-27 | 日立金属株式会社 | Composite roll for rolling and method for producing the same |
| CN115945259A (en) * | 2023-01-18 | 2023-04-11 | 东北大学 | A deep-groove stress-releasing bimetallic composite roll sleeve and its preparation method and application |
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