Effect of laser quenching process parameters on microstructure and properties of Cr12MoV steel

doi:10.13251/j.issn.0254-6051.2023.10.039

Abstract

Abstract: Effect of laser quenching on microstructure and properties of Cr12MoV steel was studied, and the effects of different laser power (1050, 1200, 1350 W) and scanning speeds (3, 4, 5 mm/s) on microstructure, hardness and residual stresses of the laser quenching surface were analyzed. The results shows that after laser quenching, the surface hardness of the Cr12MoV steel increases obviously, and the surface residual stress changes from tensile stress to compressive stress. When the laser power is 1200 W and the scanning speed is 4 mm/s, the surface macromorphology is flat, the microstructure is refined, the surface microhardness reaches the maximum value of 653.68 HV, and the residual compressive stress reaches -259.29 MPa.

Key words: laser quenching, Cr12MoV steel, microstructure, hardness, residual stress

CLC Number:

TG156.33

Feng Aixin, Zhao Jian, Lin Jinhao. Effect of laser quenching process parameters on microstructure and properties of Cr12MoV steel[J]. Heat Treatment of Metals, 2023, 48(10): 255-259.

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