Shot peening treatment of chains for mining

doi:10.13251/j.issn.0254-6051.2023.05.043

Abstract

Abstract: To improve the service life of the mining circular chain, shot peening was carried out on 23MnNiCrMo53K steel chain, and the effect of shot peening on microstructure and fatigue resistance was studied. The results show that the microstructure of the chains is mainly tempered martensite before shot peening, and after shot peening, the surface microstructure is refined to form sub crystals, with a depth of 400 μm from the surface, the microstructure is basically close to that before shot peening. After shot peening, the surface microhardness of the chains increases, and with the increase of the surface layer depth, the microhardness gradually decreases, and the fatigue life of the chains significantly increases.

Key words: shot peening, chains for mining, microstructure, fatigue resistance

CLC Number:

TG115

Lu Junling, Zhang Jianbin, Chen Feifei. Shot peening treatment of chains for mining[J]. Heat Treatment of Metals, 2023, 48(5): 275-278.

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