According to the experiment data, the suitability of the pre-selected welding process parameters and the groove shape are testified, and the correlation between weld penetration depth and root gap& welding process parameters is studied quantitatively. 根据实验数据,对预选焊接工艺参数和坡口形状尺寸的合理性进行了验证。并考察了不同焊接工艺条件下熔深与接头间隙和焊接工艺参数之间的相关性。