T91耐热钢服役后的析出相分析  

Precipitation Analysis of T91 Heat-resistant Steel After Service

作　　者：麻建中 黄友桥 车畅[2] 刘翔[2] MA Jian-zhong;HUANG You-qiao;CHE Chang(Zhejiang Zheneng Lanxi Power Generation Co.,Ltd.;China Special Equipment Inspection and Research Institute)

机构地区：[1]浙江浙能兰溪发电有限责任公司,浙江兰溪321100 [2]中国特种设备检测研究院

出　　处：《电站系统工程》2021年第1期80-81,84,共3页Power System Engineering

基　　金：浙能集团2020年科技项目(K-19-G02)资助。

摘　　要：以被广泛用作超临界锅炉高温过热器和高温再热器部件的T91耐热钢为研究对象,分析材料在服役过程中析出相的演化规律。结果表明:服役后析出新相Laves相,Laves相优先在晶界处析出和长大;随着运行时间的延长,析出相的总量增加,Laves相占比增加。Laves相的析出会对T91耐热钢的蠕变强度产生不利影响,易成为蠕变空穴核心,最终导致锅炉高温过热器和高温再热器失效。For T91 heat-resistant steel widely used as high-temperature superheater and high-temperature reheater component in supercritical boilers, the evolution of the precipitated phase of the material during service were analyzed.The results show after serving, the new Laves phase precipitates, Laves phase preferentially precipitates and grows at the grain boundaries. With the increase of operating time, the total amount of precipitated phase increases and the proportion of Laves phase increases.

关 键 词：超临界锅炉 T91钢 析出相 蠕变 

分 类 号：TK225[动力工程及工程热物理—动力机械及工程]