The result shows that the satisfactory weld quality of the quenched and tempered 30CrMnSiA steel with LBW will be got easily. The weld crack and the obvious change of performance at the heat-affected zone are not appeared.

• 结果表明 ,采用激光焊接调质状态下的 30CrMnSiA钢 ,易获得质量优良的焊缝 ,不会出现常见的焊接裂纹和明显的热影响区性能变化 ;