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[单选题]
板材对接要求全焊透,采用I形坡口埋弧自动焊双面焊,要求先焊的背面焊道熔深()。
A.40%~50%
B.50%~60%
C.60%~70%
D.60%~70%
查看答案
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A.40%~50%
B.50%~60%
C.60%~70%
D.60%~70%
A.对接接头:坡口每侧各为(10~15)mm
B.对接接头:破口每侧各为(10~20)mm
C.角接接头:(焊脚尺寸K值+10)mm
D.埋弧焊接头:(以上清理范围+5)mm
E.埋弧焊接头:(以上清理范围+10)mm