CN108060365B - High-chromium cast steel roller for rolling hot-rolled plate strip - Google Patents
High-chromium cast steel roller for rolling hot-rolled plate strip Download PDFInfo
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- CN108060365B CN108060365B CN201711370605.XA CN201711370605A CN108060365B CN 108060365 B CN108060365 B CN 108060365B CN 201711370605 A CN201711370605 A CN 201711370605A CN 108060365 B CN108060365 B CN 108060365B
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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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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/18—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
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
Abstract
The invention discloses a high-chromium cast steel roller for rolling a hot-rolled plate strip, which comprises a roller core and a roller body working layer, wherein the chemical components of the roller body working layer and the mass percentage of the chemical components are C1.60-2.00%, Si 0.60-1.00%, Mn 0.80-1.50%, Cr 12.00-15.00%, Ni 1.00-2.00%, Mo 1.00-2.50%, V not less than 0.10%, S not more than 0.03%, P not more than 0.05%, and the balance of Fe and inevitable impurities. The invention improves the carbon content and inhibits the generation of pearlite in an as-cast structure by improving the chemical components of the working layer of the roller body and adjusting the heat treatment process, so that the mechanical strength and the wear resistance of the roller are improved, high-temperature quenching is not needed in the rolling process, equipment can be saved, the production period is shortened, the production cost is reduced, and the stability of the performance of the roller is improved.
Description
Technical Field
The invention relates to a roller, in particular to a high-chromium cast steel roller which is used for rolling a hot-rolled plate strip.
Background
The high-chromium cast steel has higher mechanical strength and wear resistance, gradually replaces semi-steel and high-chromium cast iron rolls, and is widely used as a front-stage working roll for rough rolling and finish rolling of a hot-rolled plate and strip mill, a rough rolling and finish rolling working roll for wide and medium plates, a finishing roll for small section steel and bar mills, and the like. Because the high-chromium cast steel roller generally has low carbon content and is influenced by alloy proportion, high-temperature quenching treatment is generally required to meet the requirement of the texture state, and the problems of complex production process and long production period exist.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-chromium cast steel roller for rolling a hot-rolled plate strip, which can improve the carbon content, inhibit the generation of pearlite in an as-cast structure, improve the mechanical strength and the wear resistance of the roller, avoid high-temperature quenching in the rolling process, save equipment, shorten the production period, reduce the production cost and improve the stability of the performance of the roller.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a high-chromium cast steel roller for rolling a hot-rolled plate strip comprises a roller core and a roller body working layer, wherein the chemical components of the roller body working layer comprise, by mass, 2.30-3.30% of C, 0.30-1.00% of Si, 0.50-1.20% of Mn, 12.00-18.00% of Cr12.00, 1.00-1.70% of Ni, 0.80-1.50% of Mo0.00-0.60% of V, less than or equal to 0.10% of S, less than or equal to 0.05% of P, and the balance of Fe and inevitable impurities.
The technical scheme of the invention is further improved as follows: when the hardness requirement of the roller is less than or equal to 80HSD, the chemical components and the mass percentage content of the working layer of the roller body are 1.60-1.80 percent of C, 0.60-1.00 percent of Si, 0.80-1.00 percent of Mn, 12.00-13.00 percent of Cr12, 1.00-1.50 percent of Ni, 1.00-2.00 percent of Mo, more than or equal to 0.10 percent of V, less than or equal to 0.03 percent of S, less than or equal to 0.05 percent of P, and the balance of Fe and inevitable impurities.
The technical scheme of the invention is further improved as follows: when the hardness requirement of the roller is more than 80HSD, the chemical components and the mass percentage of the chemical components of the working layer of the roller body are 1.80-2.00 percent of C, 0.60-1.00 percent of Si, 1.00-1.50 percent of Mn, 13.00-15.00 percent of Cr13, 1.50-2.00 percent of Ni, 2.00-2.50 percent of Mo, more than or equal to 0.10 percent of V, less than or equal to 0.03 percent of S, less than or equal to 0.05 percent of P, and the balance of Fe and inevitable impurities.
The technical scheme of the invention is further improved as follows: the carbide area content in the roll body working layer is 12-16%, and the martensite structure hardness in the roll body working layer is more than or equal to 540 HV.
The technical scheme of the invention is further improved as follows: the martensite in the working layer of the roller body is dispersed with granular carbide wear-resistant particles.
The technical scheme of the invention is further improved as follows: the hardness of the working layer of the roller body is 70-85 HSD, and the difference of the hardness of the working layer of the roller body is less than or equal to 3 HSD.
The technical scheme of the invention is further improved in that the manufacturing method comprises the following steps:
A. smelting: proportioning according to chemical components of the working layer of the roller, and smelting in an induction furnace to obtain molten steel of the working layer of the roller at 1450-1550 ℃; smelting pig iron serving as a raw material in an induction furnace to obtain molten steel of the roller core, wherein the smelting temperature is 1450-1500 ℃;
B. centrifugal casting: casting and molding the roller body working layer by adopting a centrifugal machine, wherein the casting temperature is 1350-1400 ℃;
C. mould assembling and casting the core part and the roll neck: combining the sand box with the working layer of the roll body and the sand box for casting the roll neck; pouring molten steel of the roller core into the combined sand box at 1380-1420 ℃ to obtain a casting;
D. boxing and sand removal: taking out the casting after slowly cooling in the combined sand box, and cleaning the molding sand attached to the surface;
E. and (3) heat treatment: and carrying out annealing heat treatment on the casting.
The technical scheme of the invention is further improved as follows: the annealing heat treatment is repeatedly carried out for 2-3 times, the annealing time is 24-36 h each time, and the annealing temperature is 490-550 ℃.
Due to the adoption of the technical scheme, the invention has the technical progress that:
according to the high-chromium cast steel roller for rolling the hot-rolled plate strip, high-temperature quenching treatment is not needed in the rolling process, equipment is saved, the production period is shortened, the production cost is reduced, and the stability of the roller performance is improved.
By designing reasonable alloy components and casting technology, the invention completely omits high-temperature quenching treatment technology, adopts annealing treatment, simplifies the manufacturing technology and greatly shortens the production period on the premise of ensuring the performance requirement of the roller.
Compared with the conventional production of high-chromium cast steel rolls, the method improves the carbon content, and precipitates granular carbide in the matrix in the annealing heat treatment process by adding strong carbide forming elements of Cr, Mo and V; meanwhile, by adding Mn and Ni elements, the generation of pearlite in an as-cast structure can be effectively inhibited, and Ms points are reduced along with the precipitation of particle carbides in the annealing treatment process, so that the transformation of a residual austenite structure into a martensite structure is promoted, and the mechanical strength and the wear resistance of the roller are greatly improved.
According to the invention, the proportion of alloy components is optimized, the internal structure state of the roller is well improved, the structure is controlled to be composed of martensite, a small amount of retained austenite and carbide, and the area content of the carbide is controlled within the range of 12-16%. A large amount of particle carbides are dispersed on the substrate, the hardness of the roller body is 70-85 HSD, the working layer hardness fall is less than or equal to 3HSD, the hardness and the wear resistance of the roller are ensured, and the roller is suitable for rolling hot-rolled strips.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
a high-chromium cast steel roller for rolling hot-rolled strips comprises the following specific implementation steps:
A. smelting: proportioning according to chemical components of the working layer of the roller, and smelting in an induction furnace to obtain molten steel of the working layer of the roller at 1450-1550 ℃; smelting pig iron serving as a raw material in an induction furnace to obtain molten steel of the roller core, wherein the smelting temperature is 1450-1500 ℃;
when the hardness requirement of the roller is less than or equal to 80HSD, the chemical components and the mass percentage of the chemical components of the working layer of the roller body are 1.60-1.80 percent of C, 0.60-1.00 percent of Si, 0.80-1.00 percent of Mn, 12.00-13.00 percent of Cr12, 1.00-1.50 percent of Ni, 1.00-2.00 percent of Mo, more than or equal to 0.10 percent of V, less than or equal to 0.03 percent of S, less than or equal to 0.05 percent of P, and the balance of Fe and inevitable impurities
When the hardness requirement of the roller is more than 80HSD, the chemical components and the mass percentage of the chemical components of the working layer of the roller body are 1.80-2.00 percent of C, 0.60-1.00 percent of Si, 1.00-1.50 percent of Mn, 13.00-15.00 percent of Cr13, 1.50-2.00 percent of Ni, 2.00-2.50 percent of Mo, more than or equal to 0.10 percent of V, less than or equal to 0.03 percent of S, less than or equal to 0.05 percent of P, and the balance of Fe and inevitable impurities.
B. Centrifugal casting: casting and molding the roller body working layer by adopting a centrifugal machine, wherein the casting temperature is 1350-1400 ℃;
C. mould assembling and casting the core part and the roll neck: combining the sand box with the working layer of the roll body and the sand box for casting the roll neck; pouring molten steel of the roller core into the combined sand box at 1380-1420 ℃ to obtain a casting;
D. boxing and sand removal: taking out the casting after slowly cooling in the combined sand box, and cleaning the molding sand attached to the surface;
E. and (3) heat treatment: and annealing heat treatment is carried out on the casting, wherein the annealing heat treatment is repeatedly carried out for 2-3 times, the annealing time is 24-36 h each time, and the annealing temperature is 490-550 ℃.
The carbide area content in the prepared roll body working layer of the roll is 12-16%, and the hardness of a martensite structure in the roll body working layer is more than or equal to 540 HV; the martensite in the working layer of the roller body is dispersed with granular carbide wear-resistant particles; the hardness of the working layer of the roller body is 70-85 HSD, and the difference of the hardness of the working layer of the roller body is less than or equal to 3 HSD.
Example 1
In the embodiment, the specification of the roller is phi 1200/1100 multiplied 1550, the thickness of the working layer is 50mm, the hardness requirement is HSD 72-78, the component design targets of the working layer of the roller body are C1.60-1.80%, Si 0.60-1.00%, Mn 0.80-1.00%, Cr 12.00-13.00%, Ni 1.00-1.50%, Mo 1.00-2.00%, V not less than 0.10%, S not more than 0.03%, P not more than 0.05%, and the balance of Fe and inevitable impurities. The manufacturing method comprises the following steps:
A. smelting: proportioning according to chemical components of the working layer of the roller, and smelting in an induction furnace to obtain molten steel of the working layer of the roller at 1450 ℃; smelting a roller core part by taking pig iron as a raw material in an induction furnace to obtain molten steel of the roller core part, wherein the smelting temperature is 1450 ℃;
B. centrifugal casting: casting and molding the roller body working layer by adopting a centrifugal machine, wherein the casting temperature is 1350 ℃;
C. mould assembling and casting the core part and the roll neck: combining the sand box with the working layer of the roll body and the sand box for casting the roll neck; pouring molten steel in the roller core part into the combined sand box at 1380 ℃ to obtain a casting;
D. boxing and sand removal: taking out the casting after slowly cooling in the combined sand box, and cleaning the molding sand attached to the surface;
E. and (3) heat treatment: annealing heat treatment is carried out on the casting, the annealing heat treatment is repeatedly carried out for 2 times, the first annealing time is 24 hours, and the annealing temperature is 530 ℃; the second annealing time is 36h, and the annealing temperature is 510 ℃.
Sampling in front of the furnace to analyze the chemical components of the molten steel, and obtaining the chemical components and mass percentage content of the refined molten steel, namely C1.65%, Si0.68%, Mn0.98%, Cr12.50%, Ni1.15%, Mo1.42%, S0.02%, P0.03%, and the balance of Fe and inevitable impurities.
Through detection, the working layer structure of the roller body consists of martensite, a small amount of retained austenite and carbide, and the area content of the carbide is 13%; the hardness of the working layer of the roller body is 74-76 HSD, the hardness fall of the working layer of the roller body is 3HSD, and the performance guarantee that the rollers have different diameters is met.
Example 2
In the embodiment, the specification of the roller is phi 1200/1100 multiplied by 1450, the thickness of the working layer is 50mm, the hardness requirement is HSD 80-85, the component design targets of the working layer of the roller body are C1.80-2.00%, Si 0.60-1.00%, Mn 1.00-1.50%, Cr 13.00-15.00%, Ni 1.50-2.00%, Mo 2.00-2.50%, V not less than 0.10%, S not more than 0.03%, P not more than 0.05%, and the balance of Fe and inevitable impurities. The manufacturing method comprises the following steps:
A. smelting: proportioning according to chemical components of the working layer of the roller, and smelting in an induction furnace to obtain molten steel of the working layer of the roller at 1550 ℃; smelting pig iron serving as a raw material in an induction furnace to obtain molten steel of the roller core, wherein the smelting temperature is 1500 ℃;
B. centrifugal casting: casting and molding the roller body working layer by adopting a centrifugal machine, wherein the casting temperature is 1400 ℃;
C. mould assembling and casting the core part and the roll neck: combining the sand box with the working layer of the roll body and the sand box for casting the roll neck; pouring molten steel at the roller core part into the combined sand box at the pouring temperature of 1420 ℃ to obtain a casting;
D. boxing and sand removal: slowly cooling the casting in the combined sand box, taking out the casting and cleaning the molding sand attached to the surface;
E. and (3) heat treatment: annealing heat treatment is carried out on the casting, the annealing heat treatment is repeatedly carried out for 3 times, the first annealing time is 24 hours, and the annealing temperature is 515 ℃; the second annealing time is 24 hours, and the annealing temperature is 510 ℃; the third annealing time is 36h, and the annealing temperature is 505 ℃.
1.85% of C, 0.78% of Si, 1.12% of Mn1, 13.50% of Cr13, 1.65% of Ni1, 2.42% of Mo2, 0.15% of V, 0.02% of S, 0.03% of P, and the balance of Fe and inevitable impurities.
Through detection, the roll body working layer consists of martensite, a small amount of residual austenite and carbide, the area content of the carbide is 15.8%, and the wear resistance and the heat crack resistance of the roll are ensured; the hardness of the working layer of the roller body is 82-84 HSD, the hardness fall of the working layer of the roller body is 2.5HSD, and the performance guarantee of different diameters of the roller is met.
Example 3
In the embodiment, the specification of the roller is phi 1200/1100 multiplied by 1700, the thickness of the working layer is 50mm, the hardness requirement is HSD 70-75, and the component design target of the working layer of the roller body is as follows: 1.60-1.80% of C, 0.60-1.00% of Si, 0.80-1.10% of Mn, 12.00-14.00% of Cr12.00, 1.00-1.50% of Ni1.00-2.00% of Mo1.00, more than or equal to 0.10% of V, less than or equal to 0.03% of S, less than or equal to 0.05% of P, and the balance of Fe and inevitable impurities. The manufacturing method comprises the following steps:
A. smelting: proportioning according to chemical components of the working layer of the roller, and smelting in an induction furnace to obtain molten steel of the working layer of the roller at the smelting temperature of 1500 ℃; smelting pig iron serving as a raw material in an induction furnace to obtain molten steel of the roller core, wherein the smelting temperature is 1480 ℃;
B. centrifugal casting: casting and molding the roll body working layer by adopting a centrifugal machine, wherein the casting temperature of molten steel is 1380 ℃;
C. mould assembling and casting the core part and the roll neck: combining the sand box with the working layer of the roll body and the sand box for casting the roll neck; pouring molten steel at the roller core part into the combined sand box at the pouring temperature of 1400 ℃ to obtain a casting;
D. boxing and sand removal: taking out the casting after slowly cooling in the combined sand box, and cleaning the molding sand attached to the surface;
E. and (3) heat treatment: annealing heat treatment is carried out on the casting, the annealing heat treatment is repeatedly carried out for 2 times, the first annealing time is 24 hours, and the annealing temperature is 550 ℃; the second annealing time is 36h, and the annealing temperature is 520 ℃.
Sampling in front of the furnace to analyze the chemical components of the molten steel, and obtaining the chemical components and mass percentage content of the refined molten steel, namely C1.67%, Si0.66%, Mn0.97%, Cr12.40%, Ni1.12%, Mo1.32%, S0.02%, P0.03%, and the balance of Fe and inevitable impurities.
Through detection, the working layer structure of the roller body consists of martensite, a small amount of retained austenite and carbide, and the area content of the carbide is 12%; the hardness of the working layer of the roller body is 74-75 HSD, the hardness fall of the working layer of the roller body is 3HSD, and the performance guarantee that the rollers have different diameters is met.
Claims (4)
1. The utility model provides a high chromium cast steel roll for hot rolling slab band is rolled, includes roll core and roll body working layer, its characterized in that: the roll body working layer comprises the following chemical components in percentage by mass of 1.60-2.00% of C, 0.60-1.00% of Si, 0.80-1.50% of Mn, 12.00-15.00% of Cr12, 1.00-2.00% of Nis, 1.00-2.50% of Mo1.00, 0.10% of V, 0.03% or less of S, 0.05% or less of P, and the balance of Fe and inevitable impurities, wherein the area content of carbide in the roll body working layer is 12-16%, the hardness of martensite structure in the roll body working layer is not less than 540HV, and the martensite in the roll body working layer is dispersed and distributed in granular carbide wear-resistant particles, and the manufacturing method comprises the following steps:
A. smelting: proportioning according to chemical components of the working layer of the roller, and smelting in an induction furnace to obtain molten steel of the working layer of the roller at 1450-1550 ℃; smelting pig iron serving as a raw material in an induction furnace to obtain molten steel of the roller core, wherein the smelting temperature is 1450-1500 ℃;
B. centrifugal casting: casting and molding the roller body working layer by adopting a centrifugal machine, wherein the casting temperature is 1350-1400 ℃;
C. mould assembling and casting the core part and the roll neck: combining the sand box with the working layer of the roll body and the sand box for casting the roll neck; pouring molten steel of the roller core into the combined sand box at 1380-1420 ℃ to obtain a casting;
D. boxing and sand removal: taking out the casting after slowly cooling in the combined sand box, and cleaning the molding sand attached to the surface;
E. and (3) heat treatment: and annealing heat treatment is carried out on the casting, wherein the annealing heat treatment is repeatedly carried out for 2-3 times, the annealing time is 24-36 h each time, and the annealing temperature is 490-550 ℃.
2. The high-chromium cast steel roll for hot-rolled strip rolling according to claim 1, characterized in that: when the hardness requirement of the roller is less than or equal to 80HSD, the chemical components and the mass percentage content of the working layer of the roller body are 1.60-1.80 percent of C, 0.60-1.00 percent of Si, 0.80-1.00 percent of Mn, 12.00-13.00 percent of Cr12, 1.00-1.50 percent of Ni, 1.00-2.00 percent of Mo, more than or equal to 0.10 percent of V, less than or equal to 0.03 percent of S, less than or equal to 0.05 percent of P, and the balance of Fe and inevitable impurities.
3. The high-chromium cast steel roll for hot-rolled strip rolling according to claim 1, characterized in that: when the hardness requirement of the roller is more than 80HSD, the chemical components and the mass percentage of the chemical components of the working layer of the roller body are 1.80-2.00 percent of C, 0.60-1.00 percent of Si, 1.00-1.50 percent of Mn, 13.00-15.00 percent of Cr13, 1.50-2.00 percent of Ni, 2.00-2.50 percent of Mo, more than or equal to 0.10 percent of V, less than or equal to 0.03 percent of S, less than or equal to 0.05 percent of P, and the balance of Fe and inevitable impurities.
4. The high-chromium cast steel roll for hot-rolled strip rolling according to claim 1, characterized in that: the hardness of the working layer of the roller body is 70-85 HSD, and the difference of the hardness of the working layer of the roller body is less than or equal to 3 HSD.
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| CN110306127B (en) * | 2019-07-11 | 2021-12-17 | 上海交通大学 | Ultrahigh-strength high-toughness alloy steel and preparation method thereof |
| CN111057835B (en) * | 2019-12-30 | 2021-11-19 | 中钢集团邢台机械轧辊有限公司 | Method for controlling structure performance of working layer of centrifugal roller |
| CN112264465B (en) * | 2020-09-29 | 2022-06-17 | 武汉钢铁有限公司 | Centrifugal composite roller |
| CN114892086A (en) * | 2022-05-07 | 2022-08-12 | 安徽新马铸造科技有限公司 | Corrosion-resistant high-strength wear-resistant steel ball |
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| CN103526126A (en) * | 2013-09-02 | 2014-01-22 | 中钢集团邢台机械轧辊有限公司 | Tool steel roller for rolling medium-thickness plate and manufacturing method thereof |
| CN104308112A (en) * | 2014-09-24 | 2015-01-28 | 江苏共昌轧辊股份有限公司 | Preparation method of reinforced D2 steel centrifugal composite rod wire finishing roll |
| CN105543655A (en) * | 2015-12-24 | 2016-05-04 | 中钢集团邢台机械轧辊有限公司 | High-chromium alloy centrifugal roller ring for universal profile steel and manufacturing method of high-chromium alloy centrifugal roller ring |
| CN106350730A (en) * | 2016-08-26 | 2017-01-25 | 中钢集团邢台机械轧辊有限公司 | High-wear-resistance alloy tool steel roll and manufacturing method thereof |
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