Optimization of heat treatment process of bainitic rails based on simulation software

doi:10.13251/j.issn.0254-6051.2024.07.006

Abstract

Abstract: DEFORM finite element software was used to simulate the quenching process of bainitic rails, and the microstructure and hardness of the rails were compared with that of the actual quenched rails to study the accuracy of the finite element simulation. The test results show that after simulated quenching, the hardened layer thickness at the rail head is 12 mm, and the hardness is 40.42-42.23 HRC, which are similar to the actual measured hardened layer thickness of 11 mm, and the hardness of 40.20-43.40 HRC, respectively. Using the color metallographic method and Image-Pro software, the bainite content at the rail head is about 63.80%, and the martensite+retained austenite content is about 36.20%. Compared with the simulation results (bainite content of 57.7%, martensite+retained austenite content of 42.3%), the errors are all around 6%. The accuracy of finite element simulation results is confirmed, which can be used to guide the actual production.

Key words: bainitic rails, heat treatment, microstructure, finite element simulation, hardening layer

CLC Number:

TG161

Chen Yanzi, Liu Xinyu, Su Hang, Xie Benchang, Cen Yaodong, Chen Lin. Optimization of heat treatment process of bainitic rails based on simulation software[J]. Heat Treatment of Metals, 2024, 49(7): 38-41.

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