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对于焊接性较差的碳化硅颗粒增强镁基（SiCp／Mg）复合材料，采用高能激光束进行了焊接．通过选择合适的激光焊工艺参数，可焊成外观成形及性能均良好的焊接接头．激光焊的输出功率（P）、焊接违反（v）、脉冲频率（f）、脉冲宽度（w）对接头强度都有影响，其中尤以激光输出功率与焊接速度的比值，即焊接线能量P/v的影响最大．对于厚度为1mm的对接缝，试验所得最佳工艺参数为：P=170Wv=7.5mm/s,f=30Hz,w=5ms.焊接时使用氢气（Ar）进行保护．所得拉伸强度值为104．3MPa，达到了母材的52％．另外，本文还应用多项式回归法建立了焊接接头拉伸强度与工艺参数关系的数学模型．
For the less weldable SiCp / Mg composites, high energy laser beam was used for welding. By selecting the appropriate laser welding process parameters can be welded into the appearance of the shape and performance are good welded joints. Laser welding output power (P), welding violation (V), pulse frequency (f), pulse width (w) have an impact on the strength of the joint, especially in laser output power and welding speed ratio, that is, welding line energy P / v the greatest impact. For the butt joint with a thickness of 1mm, the optimum process parameters are as follows: P = 170Wv = 7.5mm / s, f = 30Hz, w = 5ms. The resulting tensile strength was 104.3 MPa, reaching 52% of the base metal. In addition, this paper also uses the polynomial regression method to establish the mathematical model of the relationship between the tensile strength of the welded joint and the process parameters.