低溫鋼的焊接操作方法
乙烯(xi)蒸餾塔(ta)縱縫埋(mai)弧焊(han)(han):乙烯(xi)蒸餾塔(ta)材質(zhi)為(wei)(wei)低(di)溫(wen)鋼(gang)(09Mn2V正火),板厚為(wei)(wei)12mm,工(gong)(gong)(gong)作溫(wen)度-70℃;工(gong)(gong)(gong)作壓力0.6MPa.采(cai)用(yong)埋(mai)弧焊(han)(han),焊(han)(han)接工(gong)(gong)(gong)藝為(wei)(wei)如下。1.焊(han)(han)接材料(liao) 焊(han)(han)絲為(wei)(wei)H08Mn2MoVA,焊(han)(han)劑為(wei)(wei)HJ250,使(shi)用(yong)前300~350℃烘干,保溫(wen)2h。2.焊(han)(han)前準備&n...