分别采用激光-活性气体保护电弧焊（Laser-MAG焊）和MAG焊对Weldox960钢板进行焊接，对比分析了两种工艺焊接接头的显微组织及性能。结果表明：Laser-MAG焊接接头热影响区粗晶区的平均晶粒尺寸较小，为48 μm，而MAG焊接接头的为95 μm，两种焊接接头的显微组织基本相同，焊缝区组织为细小粒状贝氏体，细晶区组织为细小板条马氏体和粒状贝氏体，部分相变区组织为铁素体+粒状贝氏体；Laser-MAG焊接接头的热影响区宽度小于MAG焊接接头的，软化带也较窄，其拉伸性能和冲击性能均优于MAG焊接接头的，条件疲劳极限为320 MPa，高于MAG焊接接头的。

Weldox960 steel plates were welded by laser-metal active gas arc welding (Laser-MAG welding) and MAG welding, and then the microstructures and properties of the welded joints by two processes were compared and analyzed. The results show that the average grain size in coarse-grained heat affected zone of the Laser-MAG welded joint was relatively small, which was 48 μm, while that of the MAG welded joint was 95 μm. The microstructures of the two welded joints were basically the same; the weld metal was composed of fine granular bainite, the fine grained zone consisted of fine lath martensite and granular bainite, and the partial phase transition zone consisted of ferrite and granular bainite. The heat affected zone of the Laser-MAG welded joint was narrower than that of the MAG welded joint and had a relatively narrow softening band. The tensile performance and impact performance were better than those of the MAG welded joint, and the conditional fatigue limit was 320 MPa, higher than that of the MAG welded joint.