Original scientific paper

Study on laser surface quenching structure and hardness of C45 steel

S. Y. Chen ; School of Applied Technology, University of Science and Technology Liaoning, Anshan, Liaoning China
Y. X. Chen orcid.org/0000-0003-4898-4531 ; School of Applied Technology, University of Science and Technology Liaoning, Anshan, Liaoning China
S. F. Jiao ; School of Applied Technology, University of Science and Technology Liaoning, Anshan, Liaoning China
L. Zhong ; School of Applied Technology, University of Science and Technology Liaoning, Anshan, Liaoning China
L. Gao ; School of Applied Technology, University of Science and Technology Liaoning, Anshan, Liaoning China
L. Miao ; School of Applied Technology, University of Science and Technology Liaoning, Anshan, Liaoning China

Abstract

The changes of hardening depth and surface hardness of C45 steel after laser surface quenching were studied. Firstly, the Nd: YAG laser and CO2 laser were used to realize the surface quenching. High power CO2 laser quenching C45 steel, variable process parameters include power, scanning speed and defocusing distance. Then, the Nd:YAG laser was used to quench the samples through orthogonal experiments, and the optimized process parameters were obtained, and the surface hardness was obviously improved. Finally, by comparing the quenching C45 steel of CO2 laser, the influence curve of process parameters on surface hardness was found, and the optimal process parameters were obtained.

Keywords

C45 steel; laser quenching; surface; hardness; microstructure

Hrčak ID:

256012

URI

https://hrcak.srce.hr/256012

Publication date:

1.7.2021.

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