With the beam power or power density increasing, the interdiffusion effect of filler metal and tube wall is enhanced, which obviously causes the transition layer to thicken thicker and the tube wall to thin thinner obviously. 随着电子束输入功率或功率密度增大,钎料和管壁的相互扩散作用增强,导致过渡层厚度增加,毛细管壁显著减薄;