以高Cr、Ni合金粉为填加材料，采用Nd:YAG脉冲激光对0.1 mm+0.8 mm+0.1 mm双面超薄不锈钢复合板进行对接焊，对焊接接头的组织、抗拉强度、焊缝区显微硬度以及焊缝表面耐腐蚀性能进行了研究。结果表明，激光焊接的表面成形性好、变形小、无缺陷，焊缝金属与覆层不锈钢及基层碳钢连接良好；焊缝中心为晶粒取向不规律的细小等轴晶，其他区域为柱状晶，几乎看不到热影响区，焊缝表面为奥氏体+少量铁素体+少量马氏体组织；焊接接头的抗拉强度达到了母材的92%，伸长率为母材的25%；焊缝区显微硬度与母材相比有显著提高；不锈钢复合板焊缝表面和母材覆层抗电化学腐蚀性能接近。

Nd:YAG pulse laser is used to weld 0.1 mm+0.8 mm+0.1 mm double-sided ultra-thin stainless steel clad plate with high chromium-nickel alloy powders as filling materials. The microstructure, tensile strength, micro hardness of welded joints, and corrosion resistance of welding surface are studied. The results show that it has good welding appearance, little deformation, non-defect, and the connecting among weld metal, stainless steel layer and the base are fine; weld center is small equiaxed of the grain orientation without regularity, and other regional is columnar crystal, barely seeing the heat affected zone (HAZ), and weld microstructure is austenite+a little ferritic+a little martensite; tensile strength of welded joint has reached 92% of the base metal, and elongatiion is 25% of base metal; the micro hardness of weld zone has been significantly improved than the base metal; electrochemical corrosion of the weld surface is similar to the composite layer of the base metal.