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Martensite high-temperature wear-resistant steel and production method thereof

A high-temperature wear-resistant and production method technology, applied in the field of wear-resistant steel production, can solve the problems of destroying the strength, hardness and wear resistance of the steel plate, reducing the service life, blurring the phase interface, etc. Small size, the effect of increasing the temperature of grain growth

Inactive Publication Date: 2021-01-26
HANDAN IRON & STEEL GROUP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The microstructure of low alloy steel with good wear resistance is martensite to ensure the organic combination of strength, hardness, toughness and wear resistance. Diffusion, aggregation, merging and reorganization, the phase interface is gradually blurred, carbides are gradually precipitated and coarsened from the martensite structure, which seriously damages the strength, hardness and wear resistance of the steel plate in the high temperature range, reducing the service life, especially at high temperature Wear-resistant steel products in service usually have to withstand a certain range of repeated impacts, that is, high-temperature impact wear

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  • Martensite high-temperature wear-resistant steel and production method thereof
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  • Martensite high-temperature wear-resistant steel and production method thereof

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Embodiment Construction

[0056] The core control process of the present invention is based on the following: Utilize the DIL805L phase change dilatometer to measure the phase change laws of the composition system with different isothermal times and different cooling rates. The experimental results are shown in Table 1, figure 1 As shown in Table 1, figure 1 It shows that the temperature Ac3 for the complete transformation of steel plate ferrite to austenite is 819°C. In order to ensure that the steel plate is fully and uniformly austenitized in the thickness direction and length direction, the quenching heat treatment heating and holding temperature is 30°C~50°C above Ac3; figure 1It shows that the temperature Ac1 at which steel plate ferrite begins to transform into austenite is 764°C, and martensitic transformation begins to occur when the cooling rate reaches 20°C / s, and the temperature at which martensite begins to transform is 422°C. As the temperature increases, the martensite transformation ...

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Abstract

The invention discloses martensite high-temperature wear-resistant steel and a production method thereof. The martensite high-temperature wear-resistant steel comprises the following chemical components in percentage by weight: 0.18%-0.24% of C, 0.1%-0.35% of Si, 0.5%-1.1% of Mn, not greater than 0.013% P, not greater than 0.004% of S, 0.03%-0.06% of Als, 0.025%-0.055% of Nb, 0.02%-0.04% of V, 0.01%-0.025% of Ti, 0.1%-0.35% of Cr, 0.25%-0.45% of Mo, 0.0005%-0.0018% of B, 0.003%-0.0045% of N, not greater than 1.7 ppm of H, 0.002%-0.004% of Ca and the balance of Fe and inevitable impurities. Inthe production method, a temperature-controlled and speed-controlled quenching process and a sub-temperature quenching heating process are adopted; and interval cooling is adopted in the quenching cooling process. The martensite high-temperature wear-resistant steel has good mechanical properties under a high-temperature service condition.

Description

technical field [0001] The invention relates to the technical field of wear-resistant steel production, in particular to a martensitic high-temperature wear-resistant steel and a production method thereof. Background technique [0002] Low-alloy wear-resistant steel series products have the characteristics of high strength, high hardness, high wear resistance, high low-temperature impact toughness, etc., and have certain processing and forming properties. They are widely used in construction machinery industry, mining, agricultural machinery, special vehicle manufacturing, shipbuilding, It is widely used in construction, oil and gas transportation and other industries, such as bulldozers, loaders, excavators, scraper conveyors, mining dump trucks, etc. The use of low-alloy wear-resistant steel products not only improves the service life of equipment under harsh working conditions, but also achieves lightweight, energy saving, green development, and cost reduction. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32C21D1/18C21D6/00C21D8/02C21D9/00C21D11/00
CPCC21D1/18C21D6/002C21D6/005C21D6/008C21D8/0221C21D9/0081C21D11/00C21D2211/008C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32
Inventor 刘红艳王昭东邓建军陈子刚邓想涛吕德文王春民杜琦铭姚宙张卫攀徐桂喜王青云
Owner HANDAN IRON & STEEL GROUP
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