双层卷焊钢管断裂原因分析  

Fracture Cause Analysis on Double Layer Welding Pipe

作　　者：卢书媛 顾伟 王卫忠 徐海斌 钱伟 许玉宇 

机构地区：[1]常熟出入境检验检疫局,江苏常熟215500

出　　处：《热加工工艺》2013年第17期224-225,共2页Hot Working Technology

摘　　要：某公司生产的双层卷焊钢管直管在弯曲后于1130℃高温下加热处理时发生断裂现象。通过断口宏观观察、金相检查、能谱分析等检测,对双层卷焊钢管进行了综合分析。结果表明,该双层焊管发生开裂的主要原因是在较高温度下处理管件导致铜渗入管件内部而产生了铜脆现象。可以通过降低处理温度来改善。The double layer welding pipe cracked during manufacturing. In order to find out the crack mode and cause, the macro and micro observation on the fracture surface, energy spectrum analysis and metallurgical structure examination were carried out. The results show that the crack is mainly related to the copper brittleness. Reducing the treatment temperature can eliminate the copper brittleness.

关 键 词：双层卷焊钢管 断裂 铜脆 

分 类 号：TG115.2[金属学及工艺—物理冶金]