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

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] ...

AI Technical Summary

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

Images