Dissimilar joining of 304 stainless steel to PMMA is accomplished by a Nd: YAG pulsed laser. The light and process were represented by laser peak power, welding speed, defocus, pulse duration, pulse frequency and Ar gas flow rate, as these experiment parameters have significant effects on joints strength, weld width, joints quality and appearance. The welding parameters were optimized by an orthogonal experiment design, then the validation and optimization experiments were carried out to obtain the best combination of process parameters. A maximum weld strength of the joints of 974 N was achieved (the joints efficiency reached 70% of the base PMMA), much larger than ever reported. Bead profiles such as bead width and mechanical strength were investigated, and five types of 304 stainless steel-PMMA welded joints and three kinds of fracture model have been proposed.

304不锈钢与PMMA的异种连接是通过Nd：YAG脉冲激光完成的。光和过程由激光峰值功率，焊接速度，散焦，脉冲持续时间，脉冲频率和Ar气体流速表示，因为这些实验参数对接头强度，焊接宽度，接头质量和外观有重大影响。通过正交实验设计对焊接参数进行优化，然后进行验证和优化实验，以获得最佳的工艺参数组合。接头的最大焊接强度达到974 N（接头效率达到基础PMMA的70％），比以往任何时候都大得多。研究了胎圈轮廓，例如胎圈宽度和机械强度，