WO2023197571A1 - Acier résistant à l'abrasion de grade 360 hb à 450 hb et son procédé de production - Google Patents

Acier résistant à l'abrasion de grade 360 hb à 450 hb et son procédé de production Download PDF

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WO2023197571A1
WO2023197571A1 PCT/CN2022/128864 CN2022128864W WO2023197571A1 WO 2023197571 A1 WO2023197571 A1 WO 2023197571A1 CN 2022128864 W CN2022128864 W CN 2022128864W WO 2023197571 A1 WO2023197571 A1 WO 2023197571A1
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steel
temperature
grade
resistant steel
quenching
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PCT/CN2022/128864
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English (en)
Chinese (zh)
Inventor
谯明亮
翟冬雨
杨柳
陈萌
马刘军
黄彪凯
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南京钢铁股份有限公司
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Publication of WO2023197571A1 publication Critical patent/WO2023197571A1/fr

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • 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
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/40—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
    • 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
    • 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
    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Definitions

  • the invention belongs to the field of metallurgical engineering, and specifically relates to a 360HB-450HB grade wear-resistant steel and a production method thereof.
  • Wear-resistant steel is widely used in engineering machinery. Among them, 360HB level and above require surface Brinell hardness and longitudinal impact energy of -20 degrees. In order to meet the performance requirements of the product, the product uses a high alloy content and the product requires high tensile strength. In the casting billet And the steel plate cutting process will produce sudden brittle fractures, which will bring great difficulties to production and manufacturing. The production of wear-resistant steel is technically difficult in the smelting and manufacturing process.
  • the first purpose of the present invention is to provide a 360HB-450HB grade wear-resistant steel
  • the second purpose is to provide a production method of the above-mentioned wear-resistant steel.
  • the chemical composition and mass percentage of the 360HB-450HB grade wear-resistant steel disclosed by the present invention are as follows: C: 0.10% ⁇ 0.30%, Si: 0.20% ⁇ 0.50%, Mn: 0.80% ⁇ 1.60%, P ⁇ 0.020 %, S ⁇ 0.005%, Ti: 0.008% ⁇ 0.025%, Cr: 0.20% ⁇ 1.00%, Ni: ⁇ 0.60%, Mo: 0.10% ⁇ 0.50%, Al: 0.025% ⁇ 0.055%, B: 0.0010% ⁇ 0.0030%, Mg: 0.0010% ⁇ 0.0018%, N ⁇ 0.0045%, the balance is Fe and inevitable impurities; steel grade surface Brinell hardness 330 ⁇ 480HBW.
  • the chemical composition and mass percentage of 360HB grade wear-resistant steel are as follows: C: 0.12% ⁇ 0.15%, Si: 0.20% ⁇ 0.40%, Mn: 1.20% ⁇ 1.50%, P ⁇ 0.015%, S ⁇ 0.003%, Ti: 0.008% ⁇ 0.020%, Cr: 0.20% ⁇ 0.80%, Mo: 0.15% ⁇ 0.30%, Al: 0.025% ⁇ 0.055%, B: 0.0010% ⁇ 0.0030%, Mg: 0.0010% ⁇ 0.0018%, N ⁇ 0.0045%, the balance is Fe and inevitable impurities; the surface Brinell hardness of steel grade is 330 ⁇ 390HBW.
  • the chemical composition and mass percentage of 400HB grade wear-resistant steel are as follows: C: 0.10% ⁇ 0.20%, Si: 0.20% ⁇ 0.40%, Mn: 0.80% ⁇ 1.50%, P ⁇ 0.020%, S ⁇ 0.005%, Ti: 0.008% to 0.025%, Cr: 0.30% to 0.90%, Ni: 0.20% to 0.50%, Mo: 0.10% to 0.50%, Al: 0.025% to 0.055%, B: 0.0010% to 0.0030%, Mg: 0.0010% ⁇ 0.0018%, N ⁇ 0.0045%, the balance is Fe and inevitable impurities; the steel grade surface Brinell hardness is 370 ⁇ 430HBW.
  • the chemical composition and mass percentage of 450HB grade wear-resistant steel are as follows: C: 0.20% ⁇ 0.30%, Si: 0.20% ⁇ 0.50%, Mn: 1.00% ⁇ 1.60%, P ⁇ 0.015%, S ⁇ 0.003%, Ti: 0.008% to 0.025%, Cr: 0.30% to 1.00%, Ni: 0.20% to 0.60%, Mo: 0.20% to 0.50%, Al: 0.025% to 0.055%, B: 0.0010% to 0.0030%, Mg: 0.0010% ⁇ 0.0018%, N ⁇ 0.0045%, the balance is Fe and inevitable impurities; the surface Brinell hardness of steel grade is 420 ⁇ 480HBW.
  • the production method of the above-mentioned 360HB-450HB grade wear-resistant steel includes the following steps:
  • the molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method.
  • the end temperature is 1590 ⁇ 1630°C, C: 0.05% ⁇ 0.10%, and P ⁇ 0.013% before tapping;
  • the cast slab is kept at a temperature of 150 ⁇ 450°C and put into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C, and is rolled using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the primary quenching temperature is set to the heating temperature of 870 ⁇ 890°C, holding for 20 ⁇ 40min, and water cooling;
  • the secondary quenching temperature is set to the heating temperature of 850 ⁇ 870°C and holding. 25 ⁇ 30min, water cooling; tempering heating temperature 260 ⁇ 280°C, heat preservation 50 ⁇ 60min, air cooling;
  • the present invention formulates the composition of steel grade NM360 ⁇ NM450 wear-resistant steel according to the national "GB/T 24186-2009 High-Strength Wear-Resistant Steel Plate for Engineering Machinery” standard, and obtains wear-resistant steel performance indicators that meet the requirements of national standards.
  • the present invention uses a vacuum treatment process to obtain clean molten steel, improves the surface quality of the cast slab, avoids the occurrence of intergranular cracks, and reduces the occurrence of delayed cracking of the cast slab and the steel plate;
  • the unique furnace charging temperature of the cast slab solves the harm caused by the internal stress of the cast slab to the quality of the steel plate.
  • the application of high-temperature austenite technology and conventional rolling technology achieves the surface and intrinsic quality requirements of high-strength steel;
  • the secondary quenching process is adopted to solve the problem of intergranular cracking of high-strength steel plates during the heat treatment process and steel plate cooling process, ensuring the quality of the product;
  • Figure 1 is a metallographic structure diagram of Embodiment 1 of the present invention.
  • Figure 2 is a metallographic structure diagram of Embodiment 2 of the present invention.
  • Figure 3 is a metallographic structure diagram of Embodiment 3 of the present invention.
  • Figure 4 is a metallographic structure diagram of Embodiment 4 of the present invention.
  • Figure 5 is a metallographic structure diagram of Example 5 of the present invention.
  • Figure 6 is a metallographic structure diagram of Embodiment 6 of the present invention.
  • Figure 7 is a metallographic structure diagram of Embodiment 7 of the present invention.
  • Figure 8 is a metallographic structure diagram of Embodiment 8 of the present invention.
  • Figure 9 is a metallographic structure diagram of Example 9 of the present invention.
  • a kind of 360HB grade wear-resistant steel, its chemical composition and mass percentage are as follows: C: 0.12%, Si: 0.20%, Mn: 1.20%, P: 0.006%, S: 0.001%, Ti: 0.008%, Cr: 0.20% , Mo: 0.15%, Al: 0.025%, B: 0.0010%, Mg: 0.0010%, N: 0.0015%, the balance is Fe and inevitable impurities; the steel grade surface Brinell hardness is 330 ⁇ 390HBW.
  • the molten iron is smelted in a converter with desulfurization and top-bottom blowing using the KR method.
  • the end-point temperature is 1590°C, C: 0.05%, and P: 0.004% before tapping;
  • the billet After the thermal inspection, the billet is kept at a temperature of 150°C and entered into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C and rolled using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the initial quenching temperature is set to the heating temperature of 870°C, held for 20 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 850°C, held for 25 minutes, and water-cooled; tempered. Heating temperature 260°C, heat preservation 50min, air cooling;
  • a kind of 360HB grade wear-resistant steel, its chemical composition and mass percentage are as follows: C: 0.14%, Si: 0.30%, Mn: 1.35%, P: 0.010%, S: 0.002%, Ti: 0.014%, Cr: 0.50% , Mo: 0.22%, Al: 0.040%, B: 0.0020%, Mg: 0.0014%, N: 0.0030%, the balance is Fe and inevitable impurities; the steel grade surface Brinell hardness is 330 ⁇ 390HBW.
  • the molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method.
  • the end-point temperature is 1610°C, C: 0.08%, and P: 0.008% before tapping;
  • the billet After the thermal inspection, the billet is kept at a temperature of 300°C and put into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C and rolled using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the primary quenching temperature is set to the heating temperature of 880°C, held for 30 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 860°C, held for 27 minutes, and water-cooled; tempered. Heating temperature 270°C, heat preservation 55min, air cooling;
  • a kind of 360HB grade wear-resistant steel, its chemical composition and mass percentage are as follows: C: 0.15%, Si: 0.40%, Mn: 1.50%, P: 0.015%, S: 0.003%, Ti: 0.020%, Cr: 0.80% , Mo: 0.30%, Al: 0.055%, B: 0.0030%, Mg: 0.0018%, N: 0.0045%, the balance is Fe and inevitable impurities; the steel grade surface Brinell hardness is 330 ⁇ 390HBW.
  • the molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method.
  • the end-point temperature is 1630°C, C: 0.10%, and P: 0.013% before tapping;
  • the billet After the thermal inspection, the billet is kept at 450°C and put into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C, and the conventional rolling process is used for rolling;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the initial quenching temperature is set to the heating temperature of 890°C, held for 40 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 870°C, held for 30 minutes, water-cooled; tempered Heating temperature 280°C, heat preservation 60min, air cooling;
  • the molten iron is smelted in a converter with desulfurization and top-bottom blowing using the KR method.
  • the end-point temperature is 1590°C, C: 0.05%, and P: 0.004% before tapping;
  • the billet After the thermal inspection, the billet is kept at a temperature of 150°C and entered into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C and rolled using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the initial quenching temperature is set to the heating temperature of 870°C, held for 20 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 850°C, held for 25 minutes, and water-cooled; tempered. Heating temperature 260°C, heat preservation 50min, air cooling;
  • the molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method.
  • the end-point temperature is 1610°C, C: 0.08%, and P: 0.008% before tapping;
  • the billet After the thermal inspection, the billet is kept at a temperature of 300°C and put into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C and rolled using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the primary quenching temperature is set to the heating temperature of 880°C, held for 30 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 860°C, held for 27 minutes, and water-cooled; tempered. Heating temperature 270°C, heat preservation 55min, air cooling;
  • the molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method.
  • the end temperature is 1630°C, C: 0.10%, and P: 0.013% before tapping;
  • the billet After the thermal inspection, the billet is kept at a temperature of 450°C and entered into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C and rolled using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the initial quenching temperature is set to the heating temperature of 890°C, held for 40 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 870°C, held for 30 minutes, water-cooled; tempered Heating temperature 280°C, heat preservation 60min, air cooling;
  • the molten iron is smelted in a converter with desulfurization and top-bottom blowing using the KR method.
  • the end-point temperature is 1590°C, C: 0.05%, and P: 0.004% before tapping;
  • the billet After the thermal inspection, the billet is kept at a temperature of 150°C and entered into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C and rolled using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the initial quenching temperature is set to the heating temperature of 870°C, held for 20 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 850°C, held for 25 minutes, and water-cooled; tempered. Heating temperature 260°C, heat preservation 50min, air cooling;
  • the molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method.
  • the end-point temperature is 1610°C, C: 0.08%, and P: 0.008% before tapping;
  • the billet After the thermal inspection, the billet is kept at a temperature of 300°C and put into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C, and the rolling process is carried out using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the primary quenching temperature is set to the heating temperature of 880°C, held for 30 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 860°C, held for 27 minutes, and water-cooled; tempered. Heating temperature 270°C, heat preservation 55min, air cooling;
  • the molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method.
  • the end-point temperature is 1630°C, C: 0.10%, and P: 0.013% before tapping;
  • the billet After the thermal inspection, the billet is kept at a temperature of 450°C and entered into the furnace.
  • the austenitizing temperature of the heating furnace is 1200 ⁇ 20°C and rolled using conventional rolling processes;
  • the rolled steel plate is sent to heat treatment for quenching and tempering.
  • the initial quenching temperature is set to the heating temperature of 890°C, held for 40 minutes, and water-cooled; the secondary quenching temperature is set to the heating temperature of 870°C, held for 30 minutes, water-cooled; tempered Heating temperature 280°C, heat preservation 60min, air cooling;

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

La présente invention divulgue un acier résistant à l'abrasion de grade 360 HB à 450 HB, comprenant les composants chimiques suivants en pourcentage en masse : C : 0,10% à -0,30%, Si : 0,20 % à 0,50 %, Mn : 0,80 % à 1,60 %, P ≤ 0,020 %, S ≤ 0,005 %, Ti : 0,008% à 0,025%, Cr : 0,20 % à 1,00 %, Ni ≤ 0,60 %, Mo : 0,10% à 0,50%, Al : 0,025% à 0,050 %, B : 0,0010 % à 0,0030 %, Mg : 0,0010 % à 0,0018 %, N ≤ 0,0045 %, le reste étant du Fe et des impuretés inévitables, la dureté Brinell de la surface de grade d'acier étant de 330 à 480 HBW. L'invention divulgue en outre un procédé de production de l'acier résistant à l'abrasion. La présente invention formule des composants de l'acier résistant à l'abrasion présentant le grade d'acier de NM360 à NM450 selon la norme nationale « plaques d'acier résistantes à l'abrasion à haute résistance GB/T 24186-2009 pour machine de construction », et l'indice de performance d'acier résistant à l'abrasion satisfaisant l'exigence standard nationale est obtenu.
PCT/CN2022/128864 2022-04-12 2022-11-01 Acier résistant à l'abrasion de grade 360 hb à 450 hb et son procédé de production WO2023197571A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210377102.XA CN114686768A (zh) 2022-04-12 2022-04-12 一种360hb-450hb级耐磨钢及其生产方法
CN202210377102.X 2022-04-12

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WO2023197571A1 true WO2023197571A1 (fr) 2023-10-19

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CN114525379A (zh) * 2022-02-15 2022-05-24 南京钢铁股份有限公司 一种煤炭采运用高耐磨性用钢及其生产方法
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