WO2023197571A1 - 360hb-450hb grade abrasion resistant steel and production method therefor - Google Patents

360hb-450hb grade abrasion resistant steel and production method therefor 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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French (fr)
Chinese (zh)
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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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    • 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;

Abstract

Disclosed in the present invention is a 360HB-450HB grade abrasion resistant steel, comprising the following chemical components in percentage by mass: 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%, and the remainder being Fe and inevitable impurities, the Brinell hardness of the steel grade surface being 330-480 HBW. Further disclosed is a production method for the abrasion resistant steel. The present invention formulates components of the abrasion resistant steel with the steel grade of NM360-NM450 according to the national standard "GB/T 24186-2009 high strength abrasion resistant steel plates for construction machine", and the abrasion resistant steel performance index satisfying the national standard requirement is obtained.

Description

一种360HB-450HB级耐磨钢及其生产方法A kind of 360HB-450HB grade wear-resistant steel and its production method 技术领域Technical field
本发明属于冶金工程领域，具体涉及一种360HB-450HB级耐磨钢及其生产方法。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.
背景技术Background technique
耐磨钢广泛应用于工程机械，其中360HB级别以上要求表面布氏硬度及纵向-20度冲击功，为了达到产品的性能要求，产品使用合金含量高，产品要求的抗拉强度高，在铸坯及钢板切割过程会产生突发性的脆性断裂，给生产制造带来很大的困难，耐磨钢生产在冶炼制造过程中技术难度大。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.
发明内容Contents of the invention
发明目的：本发明第一目的是提供一种360HB-450HB级耐磨钢，第二目的是提供上述耐磨钢的生产方法。Purpose of the invention: The first purpose of the present invention is to provide a 360HB-450HB grade wear-resistant steel, and the second purpose is to provide a production method of the above-mentioned wear-resistant steel.
技术方案：本发明公开的360HB-450HB级耐磨钢，其化学成分及质量百分比如下：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％，余量为Fe和不可避免的杂质；钢级表面布氏硬度330～480HBW。Technical solution: 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.
进一步的，360HB级耐磨钢的化学成分及质量百分比如下：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％，余量为Fe和不可避免的杂质；钢级表面布氏硬度330～390HBW。Further, 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.
进一步的，400HB级耐磨钢的化学成分及质量百分比如下：C：0.10％～0.20％，Si：0.20％～0.40％，Mn：0.80％～1.50％，P≤0.020％，S≤0.005％，Ti：0.008％～0.025％，Cr：0.30％～0.90％，Ni:0.20％～0.50％，Mo:0.10％～0.50％，Al：0.025％～0.055％，B：0.0010％～0.0030％，Mg：0.0010％～0.0018％，N≤0.0045％，余量为Fe和不可避免的杂质；钢级表面布氏硬度370～430HBW。Further, 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.
进一步的，450HB级耐磨钢的化学成分及质量百分比如下：C：0.20％～0.30％，Si：0.20％～0.50％，Mn：1.00％～1.60％，P≤0.015％，S≤0.003％，Ti：0.008％～0.025％，Cr：0.30％～1.00％，Ni:0.20％～0.60％，Mo:0.20％～0.50％，Al：0.025％～0.055％，B：0.0010％～0.0030％，Mg：0.0010％～0.0018％，N≤0.0045％，余量为Fe和不可避免的杂质；钢级表面布氏硬度420～480HBW。Further, 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.
上述360HB-450HB级耐磨钢的生产方法，包括以下步骤：The production method of the above-mentioned 360HB-450HB grade wear-resistant steel includes the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1590～1630℃，C:0.05％～0.10％，P≤0.013％后进行出钢作业；S1. The molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method. The end temperature is 1590~1630℃, C: 0.05%~0.10%, and P≤0.013% before tapping;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间15～20min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 15 to 20 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度10～20℃，连铸拉速0.6～1.3m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 10~20℃, the continuous casting speed is 0.6~1.3m/min, and full protection casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度150～450℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. After the thermal inspection, the cast slab is kept at a temperature of 150~450℃ and put into the furnace. The austenitizing temperature of the heating furnace is 1200±20℃, and is rolled using conventional rolling processes;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度870～890℃，保温20～40min，水冷；二次淬火温度设定为加热温度850～870℃，保温25～30min，水冷；回火加热温度260～280℃，保温50～60min，空冷；S5. 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℃, holding for 20~40min, and water cooling; the secondary quenching temperature is set to the heating temperature of 850~870℃ and holding. 25～30min, water cooling; tempering heating temperature 260～280℃, heat preservation 50～60min, air cooling;
S6、调质后用电子加热垫将钢板加热到120～150℃，出炉用燃烧枪进行切割，起刀速度160～200mm/min，切割速度350～380mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 120~150℃. Use a burning gun to cut the steel plate. The starting speed is 160~200mm/min and the cutting speed is 350~380mm/min. After the cutting is completed, cover it with fire-resistant insulation. The cotton is cooled slowly to room temperature to relieve stress from cutting.
有益效果：相对于现有技术：Beneficial effects: Compared with existing technology:
1、本发明根据国家“GB/T 24186-2009工程机械用高强度耐磨钢板”标准制定了钢级NM360～NM450级别耐磨钢成分，获得了满足国家标准要求的耐磨钢性能指标。1. 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.
2、本发明采用真空处理工艺获得了洁净钢水，提升了铸坯的表面质量，避免了晶间裂纹的发生，减少了铸坯及钢板延迟开裂的发生；2. 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;
3、采用独特的铸坯入炉温度，解决了铸坯内应力对钢板质量的危害，高温奥氏体技术应用及常规轧制技术的应用，获得了高强度钢表面及内在质量的要求；3. 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;
4、采用了二次淬火工艺，解决了高强度钢板在热处理过程及钢板冷却过程的晶间开裂问题，保证了产品的质量；4. 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;
5、钢板切记工艺解决了钢板内应力大的问题，保证了钢板具有良好的表面质量与内部质量。5. Keep in mind that the steel plate process solves the problem of high internal stress in the steel plate and ensures that the steel plate has good surface quality and internal quality.
附图说明Description of the drawings
图1为本发明实施例1的金相组织图；Figure 1 is a metallographic structure diagram of Embodiment 1 of the present invention;
图2为本发明实施例2的金相组织图；Figure 2 is a metallographic structure diagram of Embodiment 2 of the present invention;
图3为本发明实施例3的金相组织图；Figure 3 is a metallographic structure diagram of Embodiment 3 of the present invention;
图4为本发明实施例4的金相组织图；Figure 4 is a metallographic structure diagram of Embodiment 4 of the present invention;
图5为本发明实施例5的金相组织图；Figure 5 is a metallographic structure diagram of Example 5 of the present invention;
图6为本发明实施例6的金相组织图；Figure 6 is a metallographic structure diagram of Embodiment 6 of the present invention;
图7为本发明实施例7的金相组织图；Figure 7 is a metallographic structure diagram of Embodiment 7 of the present invention;
图8为本发明实施例8的金相组织图；Figure 8 is a metallographic structure diagram of Embodiment 8 of the present invention;
图9为本发明实施例9的金相组织图。Figure 9 is a metallographic structure diagram of Example 9 of the present invention.
具体实施方式Detailed ways
下面结合附图和实施例对本发明做进一步描述。The present invention will be further described below in conjunction with the accompanying drawings and examples.
实施例1Example 1
一种360HB级耐磨钢，其化学成分及质量百分比如下：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％，余量为Fe和不可避免的杂质；钢级表面布氏硬度330～390HBW。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.
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1590℃，C：0.05％，P：0.004％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间15min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 15 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度10℃，连铸拉速0.6m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 10°C, the continuous casting speed is 0.6m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度150℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度870℃，保温20min，水冷；二次淬火温度设定为加热温度850℃，保温25min，水冷；回火加热温度260℃，保温50min，空冷；S5. 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℃, heat preservation 50min, air cooling;
S6、调质后用电子加热垫将钢板加热到120℃，出炉用燃烧枪进行切割，起刀速度160mm/min，切割速度350mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 120°C. Use a burning gun to cut the steel plate. The starting speed is 160mm/min and the cutting speed is 350mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图1所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 1, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000001
Figure PCTCN2022128864-appb-000001
实施例2Example 2
一种360HB级耐磨钢，其化学成分及质量百分比如下：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％，余量为Fe和不可避 免的杂质；钢级表面布氏硬度330～390HBW。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.
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1610℃，C：0.08％，P：0.008％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间18min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 18 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度15℃，连铸拉速0.8m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 15°C, the continuous casting speed is 0.8m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度300℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度880℃，保温30min，水冷；二次淬火温度设定为加热温度860℃，保温27min，水冷；回火加热温度270℃，保温55min，空冷；S5. 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℃, heat preservation 55min, air cooling;
S6、调质后用电子加热垫将钢板加热到135℃，出炉用燃烧枪进行切割，起刀速度180mm/min，切割速度365mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 135°C. Use a burning gun to cut the steel plate. The starting speed is 180mm/min and the cutting speed is 365mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图2所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 2, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000002
Figure PCTCN2022128864-appb-000002
实施例3Example 3
一种360HB级耐磨钢，其化学成分及质量百分比如下：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％，余量为Fe和不可避免的杂质；钢级表面布氏硬度330～390HBW。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.
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1630℃，C：0.10％，P：0.013％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间20min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 20 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度20℃，连铸拉速1.3m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 20°C, the continuous casting speed is 1.3m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度450℃入炉，加热炉奥氏体化温度1200±20℃，采 用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度890℃，保温40min，水冷；二次淬火温度设定为加热温度870℃，保温30min，水冷；回火加热温度280℃，保温60min，空冷；S5. 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℃, heat preservation 60min, air cooling;
S6、调质后用电子加热垫将钢板加热到150℃，出炉用燃烧枪进行切割，起刀速度200mm/min，切割速度380mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 150°C. Use a burning gun to cut the steel plate. The starting speed is 200mm/min and the cutting speed is 380mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图3所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 3, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000003
Figure PCTCN2022128864-appb-000003
实施例4Example 4
一种400HB级耐磨钢，其化学成分及质量百分比如下：C：0.10％，Si：0.20％，Mn：0.80％，P：0.010％，S：0.003％，Ti：0.008％，Cr：0.30％，Ni:0.20％，Mo:0.10％，Al：0.025％，B：0.0010％，Mg：0.0010％，N：0.0015％，余量为Fe和不可避免的杂质；钢级表面布氏硬度370～430HBW。A 400HB grade wear-resistant steel with the following chemical composition and mass percentage: C: 0.10%, Si: 0.20%, Mn: 0.80%, P: 0.010%, S: 0.003%, Ti: 0.008%, Cr: 0.30% , Ni: 0.20%, Mo: 0.10%, Al: 0.025%, B: 0.0010%, Mg: 0.0010%, N: 0.0015%, the balance is Fe and inevitable impurities; steel grade surface Brinell hardness 370~430HBW .
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1590℃，C：0.05％，P：0.004％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间15min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 15 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度10℃，连铸拉速0.6m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 10°C, the continuous casting speed is 0.6m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度150℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度870℃，保温20min，水冷；二次淬火温度设定为加热温度850℃，保温25min，水冷；回火加热温度260℃，保温50min，空冷；S5. 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℃, heat preservation 50min, air cooling;
S6、调质后用电子加热垫将钢板加热到120℃，出炉用燃烧枪进行切割，起刀速度160mm/min，切割速度350mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 120°C. Use a burning gun to cut the steel plate. The starting speed is 160mm/min and the cutting speed is 350mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图4所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 4, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000004
Figure PCTCN2022128864-appb-000004
实施例5Example 5
一种400HB级耐磨钢，其化学成分及质量百分比如下：C：0.15％，Si：0.30％，Mn：1.10％，P：0.015％，S：0.004％，Ti：0.015％，Cr：0.60％，Ni:0.35％，Mo:0.35％，Al：0.040％，B：0.0020％，Mg：0.0014％，N：0.0030％，余量为Fe和不可避免的杂质；钢级表面布氏硬度370～430HBW。A 400HB grade wear-resistant steel with the following chemical composition and mass percentage: C: 0.15%, Si: 0.30%, Mn: 1.10%, P: 0.015%, S: 0.004%, Ti: 0.015%, Cr: 0.60% , Ni: 0.35%, Mo: 0.35%, Al: 0.040%, B: 0.0020%, Mg: 0.0014%, N: 0.0030%, the balance is Fe and inevitable impurities; steel grade surface Brinell hardness 370~430HBW .
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1610℃，C：0.08％，P：0.008％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间18min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 18 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度15℃，连铸拉速0.8m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 15°C, the continuous casting speed is 0.8m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度300℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度880℃，保温30min，水冷；二次淬火温度设定为加热温度860℃，保温27min，水冷；回火加热温度270℃，保温55min，空冷；S5. 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℃, heat preservation 55min, air cooling;
S6、调质后用电子加热垫将钢板加热到135℃，出炉用燃烧枪进行切割，起刀速度180mm/min，切割速度365mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 135°C. Use a burning gun to cut the steel plate. The starting speed is 180mm/min and the cutting speed is 365mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图5所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 5, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000005
Figure PCTCN2022128864-appb-000005
实施例6Example 6
一种400HB级耐磨钢，其化学成分及质量百分比如下：C：0.20％，Si：0.40％，Mn：1.50％，P：0.020％，S：0.005％，Ti：0.025％，Cr：0.90％，Ni:0.50％，Mo:0.50％，Al：0.055％，B：0.0030％，Mg：0.0018％，N：0.0045％，余量为Fe和不可避免的杂质；钢级表面布氏硬度370～430HBW。A 400HB grade wear-resistant steel with the following chemical composition and mass percentage: C: 0.20%, Si: 0.40%, Mn: 1.50%, P: 0.020%, S: 0.005%, Ti: 0.025%, Cr: 0.90% , Ni: 0.50%, Mo: 0.50%, Al: 0.055%, B: 0.0030%, Mg: 0.0018%, N: 0.0045%, the balance is Fe and inevitable impurities; steel grade surface Brinell hardness 370~430HBW .
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1630℃，C：0.10％，P：0.013％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间20min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 20 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度20℃，连铸拉速1.3m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 20°C, the continuous casting speed is 1.3m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度450℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度890℃，保温40min，水冷；二次淬火温度设定为加热温度870℃，保温30min，水冷；回火加热温度280℃，保温60min，空冷；S5. 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℃, heat preservation 60min, air cooling;
S6、调质后用电子加热垫将钢板加热到150℃，出炉用燃烧枪进行切割，起刀速度200mm/min，切割速度380mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 150°C. Use a burning gun to cut the steel plate. The starting speed is 200mm/min and the cutting speed is 380mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图6所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 6, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000006
Figure PCTCN2022128864-appb-000006
实施例7Example 7
一种450HB级耐磨钢，其化学成分及质量百分比如下：C：0.20％，Si：0.20％，Mn：1.00％，P：0.005％，S：0.001％，Ti：0.008％，Cr：0.30％，Ni:0.20％，Mo:0.20％，Al：0.025％，B：0.0010％，Mg：0.0010％，N：0.0015％，余量为Fe和不可避免的杂质；钢级表面布氏硬度420～480HBW。A 450HB grade wear-resistant steel with the following chemical composition and mass percentage: C: 0.20%, Si: 0.20%, Mn: 1.00%, P: 0.005%, S: 0.001%, Ti: 0.008%, Cr: 0.30% , Ni: 0.20%, Mo: 0.20%, Al: 0.025%, B: 0.0010%, Mg: 0.0010%, N: 0.0015%, the balance is Fe and inevitable impurities; steel grade surface Brinell hardness 420~480HBW .
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1590℃，C：0.05％，P：0.004％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间15min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 15 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度10℃，连铸拉速0.6m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 10°C, the continuous casting speed is 0.6m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度150℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度 870℃，保温20min，水冷；二次淬火温度设定为加热温度850℃，保温25min，水冷；回火加热温度260℃，保温50min，空冷；S5. 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℃, heat preservation 50min, air cooling;
S6、调质后用电子加热垫将钢板加热到120℃，出炉用燃烧枪进行切割，起刀速度160mm/min，切割速度350mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 120°C. Use a burning gun to cut the steel plate. The starting speed is 160mm/min and the cutting speed is 350mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图7所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 7, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000007
Figure PCTCN2022128864-appb-000007
实施例8Example 8
一种450HB级耐磨钢，其化学成分及质量百分比如下：C：0.25％，Si：0.35％，Mn：1.30％，P：0.010％，S：0.002％，Ti：0.015％，Cr：0.70％，Ni:0.40％，Mo:0.35％，Al：0.040％，B：0.0020％，Mg：0.0014％，N：0.0030％，余量为Fe和不可避免的杂质；钢级表面布氏硬度420～480HBW。A 450HB grade wear-resistant steel with the following chemical composition and mass percentage: C: 0.25%, Si: 0.35%, Mn: 1.30%, P: 0.010%, S: 0.002%, Ti: 0.015%, Cr: 0.70% , Ni: 0.40%, Mo: 0.35%, Al: 0.040%, B: 0.0020%, Mg: 0.0014%, N: 0.0030%, the balance is Fe and inevitable impurities; steel grade surface Brinell hardness 420~480HBW .
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1610℃，C：0.08％，P：0.008％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间18min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 18 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度15℃，连铸拉速0.8m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 15°C, the continuous casting speed is 0.8m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度300℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度880℃，保温30min，水冷；二次淬火温度设定为加热温度860℃，保温27min，水冷；回火加热温度270℃，保温55min，空冷；S5. 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℃, heat preservation 55min, air cooling;
S6、调质后用电子加热垫将钢板加热到135℃，出炉用燃烧枪进行切割，起刀速度180mm/min，切割速度365mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 135°C. Use a burning gun to cut the steel plate. The starting speed is 180mm/min and the cutting speed is 365mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图8所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 8, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000008
Figure PCTCN2022128864-appb-000008
实施例9Example 9
一种450HB级耐磨钢，其化学成分及质量百分比如下：C：0.30％，Si：0.50％，Mn：1.60％，P：0.015％，S：0.003％，Ti：0.025％，Cr：1.00％，Ni:0.60％，Mo:0.50％，Al：0.055％，B：0.0030％，Mg：0.0018％，N：0.0045％，余量为Fe和不可避免的杂质；钢级表面布氏硬度420～480HBW。A 450HB grade wear-resistant steel with the following chemical composition and mass percentage: C: 0.30%, Si: 0.50%, Mn: 1.60%, P: 0.015%, S: 0.003%, Ti: 0.025%, Cr: 1.00% , Ni: 0.60%, Mo: 0.50%, Al: 0.055%, B: 0.0030%, Mg: 0.0018%, N: 0.0045%, the balance is Fe and inevitable impurities; steel grade surface Brinell hardness 420~480HBW .
采用以下生产方法，包括以下步骤：The following production method is adopted, including the following steps:
S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1630℃，C：0.10％，P：0.013％后进行出钢作业；S1. 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;
S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间20min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 20 minutes;
S3、钢水转运后送至连铸台进行浇铸，中包过热度20℃，连铸拉速1.3m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 20°C, the continuous casting speed is 1.3m/min, and fully protected casting is used to avoid secondary oxidation of the molten steel;
S4、铸坯热检后保持温度450℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. 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;
S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度890℃，保温40min，水冷；二次淬火温度设定为加热温度870℃，保温30min，水冷；回火加热温度280℃，保温60min，空冷；S5. 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℃, heat preservation 60min, air cooling;
S6、调质后用电子加热垫将钢板加热到150℃，出炉用燃烧枪进行切割，起刀速度200mm/min，切割速度380mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 150°C. Use a burning gun to cut the steel plate. The starting speed is 200mm/min and the cutting speed is 380mm/min. After cutting is completed, cover it with refractory insulation cotton and slowly cool it to room temperature. to eliminate the stress caused by cutting.
所得金相组织图如图9所示，其性能参数如下：The obtained metallographic structure diagram is shown in Figure 9, and its performance parameters are as follows:
Figure PCTCN2022128864-appb-000009
Figure PCTCN2022128864-appb-000009

Claims (5)

  1. 一种360HB-450HB级耐磨钢，其特征在于，其化学成分及质量百分比如下：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％，余量为Fe和不可避免的杂质；钢级表面布氏硬度330～480HBW。A 360HB-450HB grade wear-resistant steel, characterized in that its chemical composition and mass percentage 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; the surface Brinell hardness of steel grade is 330 ~ 480HBW.
  2. 根据权利要求1所述的360HB-450HB级耐磨钢，其特征在于：360HB级耐磨钢的化学成分及质量百分比如下：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％，余量为Fe和不可避免的杂质；钢级表面布氏硬度330～390HBW。The 360HB-450HB grade wear-resistant steel according to claim 1, characterized in that: 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; steel grade surface Brinell hardness 330 ~ 390HBW.
  3. 根据权利要求1所述的360HB-450HB级耐磨钢，其特征在于：400HB级耐磨钢的化学成分及质量百分比如下：C：0.10％～0.20％，Si：0.20％～0.40％，Mn：0.80％～1.50％，P≤0.020％，S≤0.005％，Ti：0.008％～0.025％，Cr：0.30％～0.90％，Ni:0.20％～0.50％，Mo:0.10％～0.50％，Al：0.025％～0.055％，B：0.0010％～0.0030％，Mg：0.0010％～0.0018％，N≤0.0045％，余量为Fe和不可避免的杂质；钢级表面布氏硬度370～430HBW。The 360HB-450HB grade wear-resistant steel according to claim 1, characterized in that: 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%～0.025%, Cr: 0.30%～0.90%, Ni: 0.20%～0.50%, 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; the steel grade surface Brinell hardness is 370 ~ 430HBW.
  4. 根据权利要求1所述的360HB-450HB级耐磨钢，其特征在于：450HB级耐磨钢的化学成分及质量百分比如下：C：0.20％～0.30％，Si：0.20％～0.50％，Mn：1.00％～1.60％，P≤0.015％，S≤0.003％，Ti：0.008％～0.025％，Cr：0.30％～1.00％，Ni:0.20％～0.60％，Mo:0.20％～0.50％，Al：0.025％～0.055％，B：0.0010％～0.0030％，Mg：0.0010％～0.0018％，N≤0.0045％，余量为Fe和不可避免的杂质；钢级表面布氏硬度420～480HBW。The 360HB-450HB grade wear-resistant steel according to claim 1, characterized in that: 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%～0.025%, Cr: 0.30%～1.00%, Ni: 0.20%～0.60%, Mo: 0.20%～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; the steel grade surface Brinell hardness is 420 ~ 480HBW.
  5. 权利要求1所述的360HB-450HB级耐磨钢的生产方法，其特征在于，包括以下步骤：The production method of 360HB-450HB grade wear-resistant steel according to claim 1, characterized in that it includes the following steps:
    S1、铁水采用KR法进行脱硫顶底复吹转炉冶炼，终点温度1590～1630℃，C:0.05％～0.10％，P≤0.013％后进行出钢作业；S1. The molten iron is smelted in a desulfurized top-bottom double-blown converter using the KR method. The end temperature is 1590~1630℃, C: 0.05%~0.10%, and P≤0.013% before tapping;
    S2、转炉冶炼后送至LF进行脱氧合金化，成分满足要求进行RH真空处理，真空度≤3.0mbar，满足真空度要求后真空处理时间15～20min；S2. After smelting in the converter, it is sent to LF for deoxidation and alloying. The components meet the requirements and undergo RH vacuum treatment. The vacuum degree is ≤3.0mbar. After meeting the vacuum degree requirements, the vacuum treatment time is 15 to 20 minutes;
    S3、钢水转运后送至连铸台进行浇铸，中包过热度10～20℃，连铸拉速0.6～1.3m/min，采用全保护浇铸避免钢水二次氧化；S3. After the molten steel is transferred, it is sent to the continuous casting table for casting. The superheat of the middle package is 10~20℃, the continuous casting speed is 0.6~1.3m/min, and full protection casting is used to avoid secondary oxidation of the molten steel;
    S4、铸坯热检后保持温度150～450℃入炉，加热炉奥氏体化温度1200±20℃，采用常规轧制工艺进行轧制；S4. After the thermal inspection, the cast slab is kept at a temperature of 150~450℃ and put into the furnace. The austenitizing temperature of the heating furnace is 1200±20℃ and rolled using conventional rolling processes;
    S5、轧制后的钢板送至热处理进行调质处理，初次淬火温度设定为加热温度870～890℃，保温20～40min，水冷；二次淬火温度设定为加热温度850～870℃，保温25～30min，水冷；回火加热温度260～280℃，保温50～60min，空冷；S5. 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℃, holding for 20~40min, and water cooling; the secondary quenching temperature is set to the heating temperature of 850~870℃ and holding. 25～30min, water cooling; tempering heating temperature 260～280℃, heat preservation 50～60min, air cooling;
    S6、调质后用电子加热垫将钢板加热到120～150℃，出炉用燃烧枪进行切割，起刀速度160～200mm/min，切割速度350～380mm/min，切割完成后，盖上耐火保温棉缓慢冷却到室温，以消除切割产生的应力。S6. After quenching and tempering, use an electronic heating pad to heat the steel plate to 120~150℃. Use a burning gun to cut the steel plate. The starting speed is 160~200mm/min and the cutting speed is 350~380mm/min. After the cutting is completed, cover it with fire-resistant insulation. The cotton is slowly cooled to room temperature to relieve stress from cutting.
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