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采用埋弧焊焊接方法对压力容器许可制造单位承制的Q245R钢制某型号油分离器进行焊接,对在焊接过程中出现的气孔、未熔合、未焊透、裂纹等焊接缺陷原因进行了分析并提出了相关预防措施.“,”Welding method of SAW (submerged arc welding) was used to pressure vessel manufacturing license unit of Oil Separator produced by Q245R. Appear air hole, lack of fusion, lack of penetration, cracks and welding of SAW defect on Q245R steel. And analyzed the reason and put forward relevant preventive measures.