Effect of heat treatment on microstructure and properties of  27CrMnSi low alloy wear-resistant steel

doi:10.13251/j.issn.0254-6051.2023.12.013

Abstract

Abstract: 27CrMnSi low-alloy wear-resistant steel was heat-treated by secondary quenching process (940 ℃, water-cooling +870 ℃, water-cooling). The microstructure, surface hardness, impact property and wear rate were analyzed to investigate the influence law of heat treatment process on microstructure and properties of the 27CrMnSi steel, by means of SU8200 scanning electron microscopy, JBD-300B impact tester, TH300 Rockwell hardness tester and M-2000 wear tester. The results show that the average hardness of the 27CrMnSi steel reaches 52.4 HRC, the impact absorbed energy reaches 18.37 J, and the average wear rate is less than 4% after secondary quenching. The properties of the 27CrMnSi steel are higher than those of low alloy wear resistant steel on the market. In addition, the martensite structure of the 27CrMnSi steel after secondary quenching treatment is finer, and the fracture morphology is a fine dimple structure with uniform distribution.

Key words: 27CrMnSi steel, secondary quenching process, impact property, microstructure

CLC Number:

TG442

Hu Min, Liu Chusheng, Wang Shengqi. Effect of heat treatment on microstructure and properties of 27CrMnSi low alloy wear-resistant steel[J]. Heat Treatment of Metals, 2023, 48(12): 87-91.

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Effect of heat treatment on microstructure and properties of 27CrMnSi low alloy wear-resistant steel

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