Continuous cooling transformation behavior of hypereutectoid rail steel

doi:10.13251/j.issn.0254-6051.2021.02.008

Abstract

Abstract: Microstructure evolution and mechanical properties of the hypereutectoid rail steel with carbon content(mass fraction) above 0.9% were investigated by means of L78 quenching dilatometer during the continuous cooling process. The continuous cooling transformation curves were determined to providing a theoretical basis for the proper post-rolling controlled cooling process. The results show that at the cooling rate from 5 ℃/s to 10 ℃/s, the cementite precipitation and martensite formation are effectively prohibited, the interlamellar spacing of pearlite is refined, and the mechanical properties of the hypereutectoid rail steel are improved.

Key words: hypereutectoid rail steel, continuous cooling transformation, pearlite, refinement

CLC Number:

TG142.21

Wang Dongmei, Zhao Leicheng, Chen Lin, Dong Rui. Continuous cooling transformation behavior of hypereutectoid rail steel[J]. Heat Treatment of Metals, 2021, 46(2): 45-49.

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