关键词: 激光焊接, 工艺参数优化, 正交试验, 异种金属

Abstract: The quality of pulsed laser welding depends on the proper matching of process parameters. Taking a servo motor as an example, this paper investigates the pulsed laser welding of dissimilar materials between a high-strength martensitic stainless steel and low-carbon steel. It studies the influence of three parameters-pulse width, pulse power percentage,and frequency-on weld formation and load-bearing capacity. To optimize the process parameters, a three-factor three-level orthogonal experiment was implemented with the objective of weld load-bearing capacity. The results show that the pulse power percentage has the most significant effect on the press-off force,and high-quality welds with a press-off force
of up to 12 kN and uniform penetration depth can be achieved with the optimized parameters.

Key words: laser welding, process parameter optimization, orthogonal experiment, dissimilar metal