Ultra-hard particle-enhanced martensitic wear-resistant steel plate and manufacturing method thereof

A technology of superhard particles and wear-resistant steel plates, which is applied in the field of alloy steel, can solve the problems of poor welding performance and processing performance of high-hardness wear-resistant steel, and difficulty in meeting equipment manufacturing requirements, so as to improve wear resistance and solve wear resistance The effect of resolving outstanding contradictions with processability and weldability

Active Publication Date: 2015-02-18
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a super-hard particle reinforced martensitic wear-resistant steel plate and its manufacturing method, which solves the problems of poor welding performance and processing performance of existing high-hardness wear-resistant steel and difficulty in meeting equipment manufacturing requirements. Provide a steel plate with wear resistance up to 1.5 times that of traditional martensitic wear-resistant steel with the same hardness

Method used

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  • Ultra-hard particle-enhanced martensitic wear-resistant steel plate and manufacturing method thereof
  • Ultra-hard particle-enhanced martensitic wear-resistant steel plate and manufacturing method thereof
  • Ultra-hard particle-enhanced martensitic wear-resistant steel plate and manufacturing method thereof

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Embodiment 1

[0027] Embodiment 1: The chemical composition of the present invention is C: 0.33; Si: 0.43; Mn: 0.54; Cr: 0.82; Ni: 0.55; Mo: 0.31; Ti: 0.61; Cu: 0.32; ; S: 0.005; P: 0.005; the balance is Fe and unavoidable impurities. Manufacturing process: converter smelting, LF refining, RH refining, slab continuous casting, rolling by medium and heavy plate rolling mill, heating furnace heating temperature 1200 ℃, finishing rolling temperature 860 ℃, rolling thickness 30mm, air cooling after rolling. Heat treatment process: austenitizing temperature 880°C, holding time 0.5 hours, water quenching to room temperature, then tempering at 200°C for 1 hour and air cooling to room temperature.

Embodiment 2

[0028] Embodiment 2: The chemical composition of the present invention is C: 0.31; Si: 0.48; Mn: 0.92; Cr: 0.91; Ni: 0.51; Mo: 0.32, Ti, 0.58, Cu: 0.35; ; S: 0.005; P: 0.015; the balance is Fe and unavoidable impurities. Manufacturing process: converter smelting, LF refining, slab continuous casting, rolling by medium and heavy plate rolling mill, heating furnace heating temperature 1180 ℃, finishing rolling temperature 900 ℃, rolling thickness 60mm, air cooling after rolling. Heat treatment process: austenitizing temperature 900°C, holding time 0.5 hours, water quenching to room temperature, then tempering at 200°C for 1 hour and air cooling to room temperature.

Embodiment 3

[0029] Embodiment 3: The chemical composition of the present invention is C: 0.38; Si: 0.45; Mn: 0.85; Cr: 0.82; Ni: 0.58; Mo: 0.38; Ti: 0.58; Cu: 0.45; ; S: 0.005; P: 0.015; the balance is Fe and unavoidable impurities. Manufacturing process: converter smelting, LF refining, slab continuous casting, rolling by medium and heavy plate rolling mill, heating furnace heating temperature 1200 ℃, finishing rolling temperature 880 ℃, rolling thickness 40mm, air cooling after rolling. Heat treatment process: austenitizing temperature 900°C, holding time 0.5 hours, water quenching to room temperature, then tempering at 200°C for 1 hour and air cooling to room temperature.

[0030] Examples of the present invention and Hardox450 mechanical properties and wear resistance testing results are shown in Table 1.

[0031] Table 1 Example of the present invention and Hardox450 mechanical properties and wear resistance testing results

[0032]

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Abstract

The invention relates to an ultra-hard particle-enhanced martensitic wear-resistant steel plate and a manufacturing method thereof and belongs to the technical field of alloy steels. The wear-resistant steel plate comprises the following chemical components in percentage by weight: 0.20-0.40% of C, 0.50-1.00% of Mn, 0.30-0.60% of Si, 0.50-0.80% of Cr, 0.40-0.60% of Ni, 0.30-0.40% of Mo, 0.40-0.80% of Ti, 0.30-0.50% of Cu, 0.0005-0. 003% of B, less than or equal to 0.005% of S, less than or equal to 0.015% of P and the balance of Fe and unavoidable impurity elements. The manufacturing method of the wear-resistant steel plate comprises the following steps: smelting in a converter or an electric furnace, carrying out external refining, carrying out continuous casting or die casting of slab, heating, rolling, cooling and carrying out heat treatment. According to the components and process, about 0.5-1.5% (volume fraction) of precipitated phases are obtained in the rolled products, the average particle size is about 1mu m; the hardness of the steel plate is HB400-500, the wear resistance reaches above 1.5 times of Hardox450 and the steel plate has excellent processing and welding performances and meets the manufacturing requirements of the relevant device.

Description

technical field [0001] The invention belongs to the technical field of alloy steel, and in particular provides a superhard particle-reinforced martensitic wear-resistant steel plate and a manufacturing method thereof, which is a superhard particle-reinforced martensite steel plate with excellent wear resistance and processing performance Wear-resistant steel. Background technique [0002] Wear-resistant steel is widely used in mechanical products such as scraper conveyors, loaders, Machines, dump trucks and various mining machinery, etc. The structure of traditional low-alloy wear-resistant steel usually chooses single-phase martensite. The main method to improve its wear resistance is to increase the carbon content in the steel and the hardness of quenched martensite. Based on this, different grades of Brinell hardness HB360-600 have been developed. Wear-resistant steel. However, with the increase of hardness, the processability and weldability of steel will seriously de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C21D8/02
CPCC21D8/0205C21D8/0221C21D2211/008C22C38/02C22C38/04C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18C22C38/32
Inventor 孙新军梁小凯李昭东雍岐龙
Owner CENT IRON & STEEL RES INST
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