摘要
对某超临界电站锅炉高温过热器爆管的失效机理进行分析,研究了某12x18H12T奥氏体不锈钢锅炉管的服役特性,探讨了此锅炉管爆管失效机理。结果表明,随服役时间的延长,该奥氏体不锈钢中σ相大量析出,析出相在晶界上呈连续链状分布,σ相硬而脆,弱化了晶界,进而造成微观损伤,最终导致爆管。
Burst failure mechanism of a superheater in a supercritical boiler was analyzed,the service characteristics of 12x18H12 T austenitic stainless steel were studied.The results show that with the prolonging of service time,the hard and brittle σ phase precipitates in this material,and distribute at the continuous chain-like grain boundaries which weakened grain boundaries and caused microscopic damage,eventually led to burst.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第12期189-193,共5页
Heat Treatment of Metals
基金
国家质检行业公益专项(201510067)
关键词
12x18H12T奥氏体钢
析出相
高温过热器管
失效机理
12x18H12T austenitic steel
precipitated phase
high temperature superbeater tube
failure mechanism
