L 360螺旋焊热煨弯管外弧产生裂纹的原因分析
Analysis on Cracking Reason of External Arc of Induction Heat Bend in L360 SAW Steel Pipe
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- 引用格式:
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荣明,鲜宁,张楠革,张丽,周辉辉.L 360螺旋焊热煨弯管外弧产生裂纹的原因分析[J].天然气与石油,2015,33(6):0.doi:
Rong Ming, Xian Ning; Zhang Nange, Zhang Li, Zhou Huihui.Analysis on Cracking Reason of External Arc of Induction Heat Bend in L360 SAW Steel Pipe [J].Natural Gas and Oil,2015,33(6):0.doi:
- DOI:
- 作者:
- 荣 明1 鲜 宁1 张楠革2 张 丽3 周辉辉4
Rong Ming, Xian Ning; Zhang Nange, Zhang Li, Zhou Huihui
- 作者单位:
- 1.中国石油集团工程设计有限责任公司西南分公司，2.中国石油西南油气田公司天然气研究院，3.长庆油田矿区服务事业部兴隆园物业服务处，4.杭州汽轮辅机有限公司
1.China Petroleum Engineering Co., Ltd. Southwest Company;2.Research Institute of Natural Gas Technology Southwest Oil and gas field company PetroChina;3.Changqing Oilfield Mining Area Services Division Xinglong Park Property Service Department;4.Hangzhou Steam Turbine Auxiliary Equipment Co., Ltd.,
- 关键词:
- 热煨弯管；裂纹；Cu污染；螺旋焊管
Hot-bending bend; Crack; Cu contamination; SAW pipe
- 摘要:
- 某制造厂在用L 360螺旋焊管生产热煨弯管的过程中发现弯管出现裂纹现象，对弯管母管进行理化检验和金相分析，确认母管材质符合标准要求。采用金相显微镜、扫描电镜(SEM)、能谱仪(EDS)对裂纹断口的组织结构、微观形貌以及裂纹区域的化学成分分布进行检测分析，发现裂纹源区有Cu污染，并结合热煨弯管的制造过程，对热煨弯管开裂的原因进行深入讨论。研究结果显示：母管表面的Cu污染是造成弯管在煨制过程中开裂的主要原因，提出了相应的生产质量控制措施。
Cracks are observed on external arcs of bends manufactured from L360 spiral welded (SAW) steel pipes. Conducted are physical and chemical inspection and metallographic examination and results show that quality of parent pipes meets requirements specified in relative standards. Applied are metallographic microscope, scanning electron microscopy (SEM) and energy spectrometer (EDS) for detection analysis on organizational structures and microstructures of crack fractographs and chemical composition distribution in crack areas and it is found that Cu contamination exists in crack source areas. Further study results show that Cu contamination on the surface of parent pipes is dominant to the bend cracking. For this reason, proposed are reasonable measures for controlling process quality during bend manufacturing.