Effect of quenching cooling rate on pearlite microstructure ofhypereutectoid rail steel

doi:10.13251/j.issn.0254-6051.2021.03.003

Abstract

Abstract: Effect of cooling rates on pearlite microstructure characteristics of the hypereutectoid rail steel in the quenching process was investigated by means of OM, SEM and hardness testes. The results show that with the increase of cooling rates, the pearlite interlamellar spacing and cementite thickness decrease from 302 nm and 43.6 nm to 205 nm and 29.2 nm, respectively. Moreover, the refined pearlite interlamellar spacing acts on the enhancement of hardness from 286 HV to 348 HV.

Key words: hypereutectoid rail steel, cooling rates, pearlite interlamellar spacing, refinement

CLC Number:

TG142.21

Wang Dongmei, Zhao Leicheng, Chen Lin, Bao Xirong, Guo Ruihua. Effect of quenching cooling rate on pearlite microstructure ofhypereutectoid rail steel[J]. Heat Treatment of Metals, 2021, 46(3): 12-16.

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