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xiao chu dan mian han shuang mian cheng xing han feng bei mian suo kong de yi zhong fang fa
Author(s): 
Pages: 80-82
Year: Issue:  9
Journal: Welding Technology

Keyword:  单面焊双面成形背面缩孔焊条倾角;
Abstract: 采用单面焊双面成形方法焊接时,第1层焊缝背面常产生缩孔.为了解决这一问题,经过多年焊接试验找到一种方法:在熄弧时采用两点击穿熄弧法,焊接时焊条与焊缝的夹角在25.~30.,结合月牙形断弧焊操作法,使电弧能深入到熔池根部和背面,加强了对熔池正反两面的保护,从而消除了单面焊双面成形焊缝背面出现的缩孔,焊缝经过X射线探伤合格率可达100%.
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