CN107746935A - A kind of high-strength abrasion-proof steel plate and its production technology - Google Patents
A kind of high-strength abrasion-proof steel plate and its production technology Download PDFInfo
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- CN107746935A CN107746935A CN201711014589.0A CN201711014589A CN107746935A CN 107746935 A CN107746935 A CN 107746935A CN 201711014589 A CN201711014589 A CN 201711014589A CN 107746935 A CN107746935 A CN 107746935A
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- steel plate
- strength abrasion
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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
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
Abstract
The invention discloses a kind of high-strength abrasion-proof steel plate and its production technology, the steel plate chemical composition composition and weight/mass percentage composition are：C：0.24~0.41%, Si：0.10~0.45%, Mn：0.35~0.70%, P≤0.015%, S≤0.010%, Cr：0.20~0.45%, Mo：0.10~0.30%, V：0.01~0.03%, B：0.0005~0.0025%, Al：0.01~0.05%, surplus is Fe and inevitable impurity；Production technology includes：Desulfurizing iron, just refining, LF refining, VD applications of vacuum, continuous casting, steel billet cleaning, heating steel billet, controlled rolling, aligning, flaw detection, quenching, steel plate inspection, cutting, sampling, inspection, spray printing storage.Gained high-strength abrasion-proof steel plate of the invention, comprehensive mechanical property is excellent, suitable for being used under strong wear working condition.
Description
Technical field
The invention belongs to wear-resisting steel plate manufacturing field, more particularly, to a kind of high-strength abrasion-proof steel plate and its production technology.
Background technology
High-strength abrasion-proof steel plate is widely used in mining machinery, engineering machinery, car as a kind of important steel products
, the field such as ship, electric power, metallurgy, such as liquid bull-dozer, loading machine, excavator, dumper scratch board conveyor, disintegrating machine, screening
Machine etc..With developing rapidly for economy, market is also increasing to the demand of high-strength abrasion-proof steel.
The hardness of the common abrasion-resistant stee of Current Domestic in the market is generally 300~500HBW, but large-scale multiple in order to extend
In the case that the service life of miscellaneous equipment wear parts or under arms operating mode are especially severe, low level wear-resisting steel plate can not
Meets the needs of downstream user, the wear-resisting steel plate of market in urgent need higher intensity and hardness reduces the wear extent of equipment, and extension makes
Use the life-span.
Abrasion-resistant stee is typically designed by rational carbon and alloying element, is given birth to using controlled rolling and process of thermal treatment
Production.Distinguished from the angle of microstructure, mainly have austenite abrasion-proof steel, Bainite wear-resisting steel, martensite wear resistant steel etc. several big
Class, most commonly used at present is martensite wear resistant steel, and this abrasion-resistant stee is mainly by increasing C and Cr, Mo, Ni, B, V, Ti
And RE etc. content, the means such as phase transformation strengthening are made full use of to improve the intensity of abrasion-resistant stee and wearability, but are improved simply
Carbon content and the content of some noble metals can bring the shortcomings of steel plate welding performance is poor, production cost is too high.
CN103194684A discloses a kind of wear-resisting steel plate, wherein contain noble metal Ni, and the mass percent of Mn elements
For 0.30~1.60%, hence it is evident that higher than the present invention, this necessarily causes the cost of alloy of abrasion-resistant stee higher, and steel plate carbon equivalent is higher, shadow
Ring welding performance.
CN103160742A discloses a kind of wear-resisting steel plate and its manufacture method, and the mass percent of wherein C element is
The mass percent of 0.60~0.75%, Mn element is 0.4~1.2%, and far above the present invention, this necessarily causes carbon equivalent too
Height, steel plate welding performance are poor.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of high-strength abrasion-proof steel plate and its production technology, present invention production
The advantage of lower cost of technique, and obtained product comprehensive mechanical property is preferable.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of high-strength abrasion-proof steel plate, the steel plate
Chemical composition forms and its weight/mass percentage composition is：C：0.24~0.41%, Si：0.10~0.45%, Mn：0.35~0.70%, P
≤ 0.015%, S≤0.010%, Cr：0.20~0.45%, Mo：0.10~0.30%, V：0.01~0.03%, B：0.0005~
0.0025%, Al：0.01~0.05%, surplus is Fe and inevitable impurity.
Steel plate thickness of the present invention is 8~100mm, and finished product microstructure is tempered martensite.
Steel plate yield strength of the present invention 1470~1510MPa, 1890~2025MPa of tensile strength, Brinell hardness 627
~643HBW, elongation percentage A50% >=7%, -40 DEG C of 25~35J of impact of collision work(.
Present invention also offers a kind of production technology of high-strength abrasion-proof steel plate, the production technology includes following process：
Desulfurizing iron, just refining, LF refining, VD applications of vacuum, continuous casting, steel billet cleaning, heating steel billet, controlled rolling, aligning, detect a flaw, quench
Fire, steel plate inspection, cutting, sampling, inspection, spray printing storage.
Heating steel billet process of the present invention, 1100~1240 DEG C of heating-up temperature, soaking time are 3.5~4.5min/cm.
Controlled rolling process of the present invention, using two-stage control rolling mill practice, using two-stage control rolling mill practice,
One stage was roughing, 1100~1150 DEG C of roughing start rolling temperature, 1000~1040 DEG C of finishing temperature, treated temperature thickness >=finished product thickness
2 times.
Controlled rolling process of the present invention, using two-stage control rolling mill practice, the two-stage is finish rolling, finish rolling open rolling temperature
910~960 DEG C of degree, finishing temperature control is at 790~820 DEG C.
Heat treatment step of the present invention, 870~950 DEG C of hardening heat, soaking time are 1.8~2.5min/mm, are come out of the stove
Direct through hardening afterwards, hardening media are water.
Smelting procedure of the present invention, molten steel are refined, depth deoxidation, desulfurization into LF stoves, according to target through electric furnace smelting
Adjustment molten steel composition is sought, Fruit storage is carried out when liquid steel temperature is up to 1620 DEG C.
Continuous casting working procedure of the present invention, thickness of strand 200-330mm.
The scientific design of the present invention content of carbon and microalloy element, passes through the refinement invigoration effect and control of microalloy element
Roll and control cold refinement reinforcing effect so that steel plate has the mechanics such as excellent intensity, hardness, elongation percentage, ballistic work and wearability
Performance.
The present invention strictly controls the content of carbon and microalloy element by rational composition design, in composition design not
Including Ni, RE etc., the production cost of abrasion-resistant stee is significantly reduced.
Steel plate yield strength of the present invention 1470~1510MPa, 1890~2025MPa of tensile strength, Brinell hardness 627
~643HBW, elongation percentage A50% >=7%, -40 DEG C of 25~35J of impact of collision work(.
High-strength abrasion-proof steel plate product standard reference of the present invention《GB/T24186-2009 engineering machinery high-strength abrasion-proofs
Steel plate》.
It is using beneficial effect caused by above-mentioned technical proposal：1st, Ni, RE are free of in chemical composition of the invention, greatly
Width reduces the content of other noble metals, significantly reduces the production cost of high-strength abrasion-proof steel plate.2nd, the present invention is using " control is rolled
The production technology of system+heat treatment ", the high-strength abrasion-proof steel plate function admirable and uniformity produced is preferable, disclosure satisfy that mine
The fields such as machinery, engineering machinery, vehicle, ship, electric power, metallurgy are to the increasingly strict demand of wear-resisting steel plate.3rd, skill of the invention
Art scheme has very strong adaptability and promotional value, while has higher cost performance and good market prospects.4th, use
The high-strength abrasion-proof steel plate comprehensive mechanical property of the inventive method production is excellent, and steel plate thickness covers 8~100mm, steel plate surrender
1470~1510MPa of intensity, 1890~2025MPa of tensile strength, 627~643HBW of Brinell hardness, elongation percentage A50% >=7%, -40
DEG C 25~35J of impact of collision work(.
Brief description of the drawings
Fig. 1 is the micro-organization chart of 500 times of the high-strength abrasion-proof steel plate of the gained of embodiment 1；
Fig. 2 is the micro-organization chart of 500 times of the high-strength abrasion-proof steel plate of the gained of embodiment 2；
Fig. 3 is the micro-organization chart of 500 times of the high-strength abrasion-proof steel plate of the gained of embodiment 3；
Fig. 4 is the micro-organization chart of 500 times of the high-strength abrasion-proof steel plate of the gained of embodiment 4；
Fig. 5 is the micro-organization chart of 500 times of the high-strength abrasion-proof steel plate of the gained of embodiment 5.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Embodiment 1
The high-strength abrasion-proof steel plate of the present embodiment 80mm thickness uses following chemical compositions and production technology.
Chemical composition forms and its weight/mass percentage composition is：C：0.37%, Si：0.20%, Mn：0.60%, P：0.008%, S：
0.003%, Cr：0.29%, Mo：0.19%, V：0.015%, B：0.0015%, Al：0.03%, surplus be Fe and inevitably it is miscellaneous
Matter.
Production technology：
（1）Molten steel refines, depth deoxidation, desulfurization into LF stoves through electric furnace smelting, according to target requires adjustment molten steel composition, molten steel
Fruit storage, continuous casting, the steel billet for obtaining thickness 300mm are carried out when temperature is up to 1620 DEG C；
（2）Heating and rolling process：1240 DEG C of the heating-up temperature of steel billet, soaking time 4.0min/cm；The start rolling temperature of roughing
1110 DEG C, 1035 DEG C of finishing temperature, treat temperature thickness 160mm；920 DEG C of the start rolling temperature of finish rolling, 800 DEG C of finishing temperature；Heat after rolling
Aligning, air cooling, obtains the steel plate of 80mm thickness；
（3）Heat treatment step：The direct through hardening of steel plate, concrete technology are：890 DEG C, soaking time 2.0min/mm of hardening heat,
Direct-water-quenching through hardening after coming out of the stove.
High-strength abrasion-proof steel plate yield strength 1477MPa, tensile strength 1930MPa, elongation percentage A obtained by the present embodiment50%
=9%, Brinell hardness 639HBW, -40 DEG C of impact of collision work(27J；Such as Fig. 1 institutes of the micro-organization chart of the high-strength abrasion-proof steel plate of gained
Show, finished product microstructure is tempered martensite.
Embodiment 2
The high-strength abrasion-proof steel plate of the present embodiment 35mm thickness uses following chemical compositions and production technology.
Chemical composition forms and its weight/mass percentage composition is：C：0.31%, Si：0.15%, Mn：0.53%, P：0.007%, S：
0.003%, Cr：0.31%, Mo：0.23%, V：0.013%, B：0.0017%, Al：0.034%, surplus be Fe and inevitably it is miscellaneous
Matter.
Production technology：
（1）Molten steel refines, depth deoxidation, desulfurization into LF stoves through electric furnace smelting, according to target requires adjustment molten steel composition, molten steel
Fruit storage, continuous casting, the steel billet for obtaining thickness 300mm are carried out when temperature is up to 1620 DEG C；
（2）Heating and rolling process：1230 DEG C of the heating-up temperature of steel billet, soaking time 4.0min/cm；The start rolling temperature of roughing
1130 DEG C, 1020 DEG C of finishing temperature, treat temperature thickness 70mm；960 DEG C of the start rolling temperature of finish rolling, 820 DEG C of finishing temperature；Heat is rectified after rolling
Directly, air cooling, 35mm thickness steel plates are obtained；
（3）Heat treatment step：The direct through hardening of steel plate, concrete technology are：900 DEG C, soaking time 2.0min/mm of hardening heat,
Direct-water-quenching through hardening after coming out of the stove.
High-strength abrasion-proof steel plate yield strength 1490MPa, tensile strength 1997MPa, elongation percentage A obtained by the present embodiment50%
=8%, Brinell hardness 631HBW, -40 DEG C of impact of collision work(29J；Such as Fig. 2 institutes of the micro-organization chart of the high-strength abrasion-proof steel plate of gained
Show, finished product microstructure is tempered martensite.
Embodiment 3
The high-strength abrasion-proof steel plate of the present embodiment 20mm thickness uses following chemical compositions and production technology.
Chemical composition forms and its weight/mass percentage composition is：C：0.27%, Si：0.18%, Mn：0.50%, P：0.006%, S：
0.002%, Cr：0.27%, Mo：0.29%, V：0.015%, B：0.0010%, Al：0.027%, surplus be Fe and inevitably it is miscellaneous
Matter.
Production technology：
（1）Molten steel refines, depth deoxidation, desulfurization into LF stoves through electric furnace smelting, according to target requires adjustment molten steel composition, molten steel
Fruit storage, continuous casting, the steel billet for obtaining thickness 200mm are carried out when temperature is up to 1620 DEG C；
（2）Heating and rolling process：1235 DEG C of the heating-up temperature of steel billet, soaking time 4.5min/cm；The start rolling temperature of roughing
1120 DEG C, 1035 DEG C of finishing temperature, treat temperature thickness 55mm；943 DEG C of the start rolling temperature of finish rolling, 813 DEG C of finishing temperature；Heat is rectified after rolling
Directly, air cooling, the steel plate of 20mm thickness is obtained；
（3）Heat treatment step：The direct through hardening of steel plate, concrete technology are：927 DEG C, soaking time 2.25min/mm of hardening heat,
Direct-water-quenching through hardening after coming out of the stove.
High-strength abrasion-proof steel plate yield strength 1494MPa, tensile strength 2013MPa, elongation percentage A obtained by the present embodiment50%
=7.5%, Brinell hardness 633HBW, -40 DEG C of impact of collision work(31J；The micro-organization chart of the high-strength abrasion-proof steel plate of gained such as Fig. 3
Shown, finished product microstructure is tempered martensite.
Embodiment 4
The high-strength abrasion-proof steel plate of the present embodiment 8mm thickness uses following chemical compositions and production technology.
Chemical composition forms and its weight/mass percentage composition is：C：0.24%, Si：0.45%, Mn：0.70%, P：0.009%, S：
0.010%, Cr：0.20%, Mo：0.10%, V：0.03%, B：0.0025%, Al：0.01%, surplus is Fe and inevitable impurity.
Production technology：
（1）Molten steel refines, depth deoxidation, desulfurization into LF stoves through electric furnace smelting, according to target requires adjustment molten steel composition, molten steel
Fruit storage, continuous casting, the steel billet for obtaining thickness 250mm are carried out when temperature is up to 1620 DEG C；
（2）Heating and rolling process：1100 DEG C of the heating-up temperature of steel billet, soaking time 4.4min/cm；The start rolling temperature of roughing
1150 DEG C, 1040 DEG C of finishing temperature, treat temperature thickness 20mm；920 DEG C of the start rolling temperature of finish rolling, 790 DEG C of finishing temperature；Heat is rectified after rolling
Directly, air cooling, the steel plate of 8mm thickness is obtained；
（3）Heat treatment step：The direct through hardening of steel plate, concrete technology are：950 DEG C, soaking time 2.5min/mm of hardening heat,
Direct-water-quenching through hardening after coming out of the stove.
High-strength abrasion-proof steel plate yield strength 1510MPa, tensile strength 2020MPa, elongation percentage A obtained by the present embodiment50%
=7%, Brinell hardness 643HBW, -40 DEG C of impact of collision work(25J；Such as Fig. 4 institutes of the micro-organization chart of the high-strength abrasion-proof steel plate of gained
Show, finished product microstructure is tempered martensite.
Embodiment 5
The high-strength abrasion-proof steel plate of the present embodiment 100mm thickness uses following chemical compositions and production technology.
Chemical composition forms and its weight/mass percentage composition is：C：0.41%, Si：0.10%, Mn：0.35%, P：0.015%, S：
0.002%, Cr：0.45%, Mo：0.30%, V：0.01%, B：0.0005%, Al：0.05%, surplus is Fe and inevitable impurity.
Production technology：
（1）Molten steel refines, depth deoxidation, desulfurization into LF stoves through electric furnace smelting, according to target requires adjustment molten steel composition, molten steel
Fruit storage, continuous casting, the steel billet for obtaining thickness 330mm are carried out when temperature is up to 1620 DEG C；
（2）Heating and rolling process：1220 DEG C of the heating-up temperature of steel billet, soaking time 3.5min/cm；The start rolling temperature of roughing
1100 DEG C, 1000 DEG C of finishing temperature, treat temperature thickness 205mm；910 DEG C of the start rolling temperature of finish rolling, 820 DEG C of finishing temperature；Heat after rolling
Aligning, air cooling, obtains the steel plate of 100mm thickness；
（3）Heat treatment step：The direct through hardening of steel plate, concrete technology are：870 DEG C, soaking time 1.8min/mm of hardening heat,
Direct-water-quenching through hardening after coming out of the stove.
High-strength abrasion-proof steel plate yield strength 1470MPa, tensile strength 1890MPa, elongation percentage A obtained by the present embodiment50%
=11%, Brinell hardness 630HBW, -40 DEG C of impact of collision work(35J；The micro-organization chart of the high-strength abrasion-proof steel plate of gained such as Fig. 5
Shown, finished product microstructure is tempered martensite.
Above example is only to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (10)
1. a kind of high-strength abrasion-proof steel plate, it is characterised in that the steel plate chemical composition composition and its weight/mass percentage composition are：C：
0.24~0.41%, Si：0.10~0.45%, Mn：0.35~0.70%, P≤0.015%, S≤0.010%, Cr：0.20~0.45%,
Mo：0.10~0.30%, V：0.01~0.03%, B：0.0005~0.0025%, Al：0.01~0.05%, surplus is Fe and can not
The impurity avoided.
A kind of 2. high-strength abrasion-proof steel plate according to claim 1, it is characterised in that the steel plate thickness be 8~
100mm；The steel plate finished product microstructure is tempered martensite.
A kind of 3. high-strength abrasion-proof steel plate according to claim 1, it is characterised in that the steel plate yield strength 1470~
1510MPa, 1890~2025MPa of tensile strength, 627~643HBW of Brinell hardness, elongation percentage A50% >=7%, -40 DEG C of impacts of collision
25~35J of work(.
4. the production technology based on a kind of high-strength abrasion-proof steel plate described in claim 1-3 any one, it is characterised in that institute
Stating production technology includes following process：Desulfurizing iron, just refining, LF refining, VD applications of vacuum, continuous casting, steel billet cleaning, steel billet add
Heat, controlled rolling, aligning, flaw detection, quenching, steel plate inspection, cutting, sampling, inspection, spray printing storage.
A kind of 5. production technology of high-strength abrasion-proof steel plate according to claim 4, it is characterised in that the heating steel billet
Process, 1100~1240 DEG C of heating-up temperature, soaking time are 3.5~4.5min/cm.
A kind of 6. production technology of high-strength abrasion-proof steel plate according to claim 4, it is characterised in that the controlled rolling
Process, using two-stage control rolling mill practice, a stage is roughing, 1100~1150 DEG C of roughing start rolling temperature, finishing temperature
1000~1040 DEG C, treat temperature thickness >=finished product thickness 2 times.
A kind of 7. production technology of high-strength abrasion-proof steel plate according to claim 4, it is characterised in that the controlled rolling
Process, using two-stage control rolling mill practice, the two-stage is finish rolling, 910~960 DEG C of finish rolling start rolling temperature, finishing temperature control
At 790~820 DEG C.
A kind of 8. production technology of high-strength abrasion-proof steel plate according to claim 4-7 any one, it is characterised in that institute
Heat treatment step, 870~950 DEG C of hardening heat are stated, soaking time is 1.8~2.5min/mm, direct through hardening after coming out of the stove, quenching
Medium is water.
A kind of 9. production technology of high-strength abrasion-proof steel plate according to claim 4-7 any one, it is characterised in that institute
State smelting procedure, molten steel is refined, depth deoxidation, desulfurization into LF stoves, according to target requires adjustment molten steel composition through electric furnace smelting,
Fruit storage is carried out when liquid steel temperature is up to 1620 DEG C.
A kind of 10. production technology of high-strength abrasion-proof steel plate according to claim 4-7 any one, it is characterised in that
The continuous casting working procedure, thickness of strand 200-330mm.
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Cited By (4)
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| CN109182666A (en) * | 2018-11-12 | 2019-01-11 | 南京钢铁股份有限公司 | A kind of width thin gauge NM450 abrasion-resistant stee steel plate and manufacturing method |
| CN109518075A (en) * | 2018-11-01 | 2019-03-26 | 徐州华腾耐磨材料有限公司 | A kind of solid iron ball of high-strength abrasion-proof and its production technology |
| CN109848214A (en) * | 2018-12-27 | 2019-06-07 | 西南铝业（集团）有限责任公司 | A kind of blank and rolled plate manufacture craft |
| CN114672735A (en) * | 2022-04-12 | 2022-06-28 | 南京钢铁股份有限公司 | Wear-resistant steel with grade of 500HB or above and production method thereof |
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