The element distribution in an electron beam welding (EBW) seam was analyzed with a scanning electron microscope (SEM). The relationships among the flow of the melting metal and the element distribution in the EBW process were discussed.

• 利用扫描电子显微镜 (SEM)分析了电子束焊缝中熔质元素分布 ,以及焊接过程中熔池流动与熔质分布的关系。