CAJ | 학술논문

通过X射线检测、金相组织检测、扫描及能谱分析，对某油气输送管道对接环焊缝缺陷及形成原因进行了分析。结果表明，环焊接头中存在焊瘤、密集气孔、内凹（焊道未填满）、未熔合和夹渣缺陷，缺陷处易产生应力集中，成为裂纹源。建议在油气管道对接环焊缝焊接操作时，一要保证管口组对精度，以减小错边、侧壁未熔合的可能性，二要选择合适的焊接方法。
통과X사선검측、금상조직검측、소묘급능보분석，대모유기수송관도대접배한봉결함급형성원인진행료분석。결과표명，배한접두중존재한류、밀집기공、내요（한도미전만）、미용합화협사결함，결함처역산생응력집중，성위렬문원。건의재유기관도대접배한봉한접조작시，일요보증관구조대정도，이감소착변、측벽미용합적가능성，이요선택합괄적한접방법。
The detection and analysis on defects and forming reason of some oil and gas transportation pipeline circumferential weld were conducted through X-ray detection, metallographic analysis, scanning electron microscope (SEM) and energy spectrum analysis. The result showed that some defects existed in circumferential welded joint, such as weld beading, porosity, indent (weld incompletely filled), incomplete fusion and slag inclusion, stress concentration easily appear in defect, turn into crack source. It suggests in welding operation of oil and gas transportation pipeline circumferential weld, on the one hand, to guarantee assembly accuracy of pipe end to decrease the possibility of offset and incomplete fusion in side wall;on the other hand to choose suitable welding method.