Effect of quenching temperature on microstructure and properties of Cr5MoVNi steel

doi:10.13251/j.issn.0254-6051.2022.09.022

Abstract

Abstract: To investigate the effect of quenching temperature on microstructure and properties of Cr5MoVNi steel, the tested steel was quenched at 1000, 1050, 1100 and 1150 ℃ respectively, and then tempered at 230 ℃. Optical microscope (OM), scanning electron microscope (SEM), transition electron microscope (TEM), X-ray diffraction (XRD) and compressive tests were employed to investigate the microstructure and mechanical properties of the tested steel. The results indicate that, with the increase of quenching temperature, the retained austenite content in the matrix of the steel increases significantly and even reaches to 100% retained austenite; the hardness decreases monotonously, and the impact absorbed energy increases to the peak value of 20.1 J when quenched at 1100 ℃, and then decreases with further increase of quenching temperature. TRIP effect occurs in the retained austenite during compressive deformation, that is the reason why the compressive strain exceeds 35%.

Key words: high-carbon Cr5MoVNi steel, quenching-tempering, microstructure, mechanical properties, carbides

CLC Number:

TG142.1

Wang Shikai, Wang Rui, Kang Yan, Yu Zhiqiang, Yan Zhijie. Effect of quenching temperature on microstructure and properties of Cr5MoVNi steel[J]. Heat Treatment of Metals, 2022, 47(9): 125-129.

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