Numerical simulation of two-track laser hardening process of 42CrMo steel

Heat Treatment and Surface Engineering

Zhao Junyu¹  Hu Zhaonan¹  Zhang Qunli²  Gu Jianfeng³  Tong Daming³  Li Chuanwei³  Zhang Ziyang³  Li Sijia⁴  Li Zhuguo⁵ 

[1] Chongqing Gearbox Co., LTD, Chongqing, People’s Republic of China;Institute of Laser Advanced Manufacturing, Zhejiang University of Technology. Hangzhou, People’s Republic of China;Institute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;Openlaser Labs, Huzhou RayOpen Research Institute. Huzhou, People’s Republic of China;Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;

关键词: Laser hardening;    numerical simulation;    overlapping;    residual stress;   

DOI  :  10.1080/25787616.2022.2052455

来源: DOAJ

【 摘 要 】

In this study, a thermal–phase–mechanical coupled numerical model was presented for the prediction of the distribution of temperature, phase and residual stress of 42CrMo steel during two-track laser hardening process. Austenite and tempering transformation were simulated based on the isoconversional method. K-M equation was used to calculate the fraction of martensite. Residual stress was calculated considering the thermal strain, transformation strain and transformation plasticity. The accuracy of the numerical model was verified according to the comparison with experimental results. The stress distribution of two-track laser hardening process was studied according to numerical simulation results. And the effect of the second track on the residual stress produced by the first track in two-track laser hardening was also analyzed by using this numerical model.

【 授权许可】

Unknown