采用脉冲Nd:YAG激光对紫铜和316L不锈钢进行焊接，对不同搭接方式下的紫铜/不锈钢搭接接头的组织及界面进行研究分析，从而找到适合紫铜/不锈钢的搭接接头形式，并对其力学性能进行分析。实验中采用光学显微镜和能谱分析仪(EDS)对搭接界面进行观察。采用X射线衍射(XRD)对界面进行物相分析。采用扫描电镜(SEM)对端口形貌进行观察。采用维氏显微硬度机和拉伸试验机对焊接接头的机械性能进行测试。实验结果表明，因为铜和铁无限固溶所以紫铜与不锈钢焊接过程中没有金属间化合物生成，并且焊接接头采用紫铜在上，不锈钢在下的搭接方式能够获得良好的微观组织及力学性能。

A pulsed wave Nd:YAG laser is used to weld copper and 316L stainless steel. The microstructural characteristics and interfaces of the welded joints by different laser lap welding of copper and 316L stainless steel are investigated to search for the suitable welded joints and then analyze their mechanical properties. Optical microscopy and energy dispersive spectroscopy (EDS) are used to observe the interface of the welded joints. X-ray diffraction (XRD) is used to analyze the phase of the interface. Scanning electron microscopy (SEM) is used to observe the fracture surface morphology of welded joint. Microhardness and tensile testing are used to analyze the mechanical properties of the welded joints. Results show that intermetallic compounds are absent in the welded joints because copper and stainless steel exhibit unlimited solid solubility. The welded joints with the copper on stainless steel overlap configuration show better microstructure and mechanical performance.