Microstructure and properties of bainitic steel for new heavy-duty railway frog

doi:10.13251/j.issn.0254-6051.2020.04.018

Abstract

Abstract: Microstructure and properties of a new-developed bainitic steel for heavy-duty railway frog were analyzed by using optical microscope scanning electron microscope,X-ray diffraction analyzer,impact test machine and universal test machine.The results show that bainite structure can be obtained under normalizing,XRD patterns show that the microstructure is carbide-free bainite.After normalizing followed by tempering at 300 ℃,the tensile strength of the material is up to 1380 MPa, and the imact absorbed energy is up to 63.33 J. The steel has high hardness and good anti-tempering stability, low temperature impact test,which shows that the material meets the technical requirements in low temperature environment.

Key words: heavy-load railway frog, bainitic steel, normalizeing, strength and toughness, hardness

CLC Number:

TG142.1

Wang Nan, Hu Zhihua, Wang Zhengyun, Wang Simin, Chen Jie, Luan Daocheng. Microstructure and properties of bainitic steel for new heavy-duty railway frog[J]. Heat Treatment of Metals, 2020, 45(4): 90-93.

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