摘要
某压力容器封头母材试板在按相应标准做冲击试验时发现冲击功不合格,通过对试板进行拉伸、腐蚀、冲击试样断口、金相、能谱等的检验及验证分析,发现封头成形后进行固溶处理时热电偶选用不当致实际固溶温度偏低,产生了大量的σ相。σ相硬而脆,大大降低了其韧性及耐腐蚀性。在对封头及试板重新固溶处理后,其冲击功符合标准要求。
In one impact test according to relevant standard,the test coupon for the parent plate of the head in one pressure vessel was found unqualified.By the following tests of tensile strength,corrosion,impact,metallograph and energy spectrum,it was found that during the solution treatment after head forming,the false selection of thermal electric couple made the solution temperature be lowered that required,so that large amount of σ phase produced.Because σ phase has hard and crisp properties,its existence greatly reduced the toughness and anticorrosion of the material.Consequently,the head and its test coupon were solution treated again,after that the impact requirement was reached.
出处
《化工设备与管道》
CAS
2014年第5期16-18,共3页
Process Equipment & Piping
基金
恒力石化二期PTA项目(D3-403)
关键词
封头
冲击功
固溶处理
Σ相
head
impact value
solution treatment
σ phase
作者简介
李小陶（1987-）,男,江苏南通人,助理工程师.主要从事理化检验、金属材料热处理及失效分析工作.
