[10] [10] HU Y W, HE X L, YU G, et al. Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere[J]. The International Journal of Advanced Manufacturing Technology, 2017, 90(9): 3555-3565.

[11] [11] ZHANG Y, CHEN G Y, MAO S, et al. Optimization of hybrid laser arc welding of 42CrMo steel to suppress pore formation[J]. Applied Physics A, 2017, 123(6): 389.

[13] [13] KAPLAN A F H, WESTIN E M, WIKLUND G, et al. Imaging in cooperation with modeling of selected defect mechanisms during fiber laser welding of stainless steel［C］//International Congress on Applications of Lasers & Electro-Optics. Temecula, California, USA: Laser Institute of America, 2008: 789-909.