uphill welding

A series of methods including plane butting vertical-up welding, welding arc physical observation, etc.

采用平板对接立向上焊接、焊接电弧物理观察等试验方法 ,观察了碱性渣系气体保护药芯焊丝熔滴过渡和电弧特性 ,研究了立向上焊焊缝成形机理及影响因素。