TiC particle enhancement mode complex phase tissue high-ductility wear-resisting steel plate and manufacturing method thereof

A wear-resistant steel plate and enhanced technology, 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 the problem of wear resistance and Workability and weldability, the effect of resolving outstanding contradictions

Active Publication Date: 2015-03-04
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a TiC particle-reinforced multi-phase structure high-plastic wear-resistant steel 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

Method used

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  • TiC particle enhancement mode complex phase tissue high-ductility wear-resisting steel plate and manufacturing method thereof
  • TiC particle enhancement mode complex phase tissue high-ductility wear-resisting steel plate and manufacturing method thereof
  • TiC particle enhancement mode complex phase tissue high-ductility wear-resisting steel plate and manufacturing method thereof

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Embodiment 1

[0030] Embodiment 1: The chemical composition of the present invention is C: 0.32; Si: 1.20; Mn: 1.95; Ni: 0.25; Mo: 0.18; Ti: 0.52; Cu: 0.36; B: 0.0021; ; P: 0.010; 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 875 ℃, rolling thickness 40mm, air cooling after rolling. Heat treatment process: austenitizing temperature 900°C, holding time 0.5 hours, air cooling to room temperature, then tempering at 200°C for 1 hour and air cooling to room temperature.

Embodiment 2

[0031] Embodiment 2: The chemical composition of the present invention is C: 0.35; Si: 1.12; Mn: 1.52; Cr: 0.48; Ni: 0.48; Mo: 0.20, Ti, 0.62, B: 0.0018; ; P: 0.008; 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 1220°C, finishing rolling temperature 900°C, rolling thickness 60mm, air cooling after rolling. Heat treatment process: austenitizing temperature 900°C, holding time 0.5 hours, water mist cooling to below 400°C, then air cooling to room temperature, then tempering at 200°C for 1 hour and air cooling to room temperature.

Embodiment 3

[0032]Embodiment 3: The chemical composition of the present invention is C: 0.30; Si: 0.45; Mn: 1.05; Cr: 0.68; Ni: 0.38; Mo: 0.45; Ti: 0.58; B: 0.0018; ; 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 885 ℃, rolling thickness 30mm, air cooling after rolling. Heat treatment process: austenitizing temperature 880°C, holding time 0.5 hours, oil quenching with No. 20 engine oil to the bottom, then tempering at 200°C for 1 hour and air cooling to room temperature.

[0033] Examples of the present invention and Hardox450 mechanical properties and wear resistance testing results are shown in Table 1.

[0034] Table 1 embodiment of the present invention and Hardox450 mechanical property and wear resistance test result

[0035]

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Abstract

The invention discloses a TiC particle enhancement mode complex phase tissue high-ductility wear-resisting steel plate and a manufacturing method thereof, belonging to the technical field of alloy steel. The steel plate is prepared from the following chemical components in percentage by weight: 0.20-0.40% of C, 1.00-2.50% of Mn, 0.80-1.50% of Si, 0.20-0.60% of Ni, 0.15-0.50% of Mo, 0.40-0.80% of Ti, 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 inevitable impurity elements. One or two of alloy elements, namely, 0.00-0.50wt% of Cu and 0.00-0.80wt% of Cr, are further added. The manufacturing method comprises the following steps: smelting by using a converter or an electric furnace, performing external refining, performing continuous casting or die casting on a slab, heating, rolling, cooling and performing thermal treatment. Complex phase tissue of granular bainite, lath martensite and TiC particles is obtained from rolling, the granular bainite comprises bainite ferrite/martensite austenite islands, the volume fraction of the residual austenite is about 6-12%, the volume fraction of TiC precipitated phase is about 0.5-1.5%, the average particle size is about 1mu m, the hardness of the steel plate is HB370-420, the wearing resistance is superior to or equal to Hardox450, the processing property and the welding property are excellent, and manufacturing requirements of relevant equipment are met.

Description

technical field [0001] The invention belongs to the technical field of alloy steel, and in particular provides a TiC particle-reinforced multi-phase structure high-plasticity wear-resistant steel plate and a manufacturing method, which is a TiC particle-reinforced multi-phase structure wear-resistant steel plate with excellent wear resistance and processing performance. grinding 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C22C38/16C22C38/54C22C33/04
CPCC21D8/0205C21D8/0226C21D8/0247C22C38/02C22C38/04C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18C22C38/32
Inventor 李昭东孙新军梁小凯雍岐龙
Owner CENT IRON & STEEL RES INST
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