压力容器2017，Vol.34Issue(10)：14-19,6.DOI:10.3969/j.issn.1001-4837.2017.10.003
显微组织对P92钢蒸汽管道焊缝区蠕变裂纹扩展速率的影响
Effect of Microstructure on Creep Crack Growth Rate in Welding Seam of Hot Reheat Steam Pipe Made of P92 Steel
王环丽 1洪鼎华 1李武平 1蔡文河 2董树青 2尤伟芳 3刘茂生 3曾燕屏3
作者信息
- 1. 国华徐州发电有限公司,江苏徐州221166
- 2. 华北电力科学研究院有限责任公司,北京100045
- 3. 北京科技大学材料科学与工程学院,北京100083
- 折叠
摘要
Abstract
The effect of microstructure on creep crack growth rate in welding seam of hot reheat steam pipe made of P92 steel was studied.The results show that the representative microstructure of the investigated welding seam is tempered martensite,but the recovery extent of lath martensite structure in distinct zones is different.The lower the recovery extent of lath martensite structure and the smaller the lath width of martensite,the smaller the creep crack growth rate.There exist two kinds of precipitates on the boundaries of prior austenite grains,martensite laths and subgrains,namely Laves phase and M23 C6 carbides,whereas in grain interiors,there is also MX carboniterides besides Laves phase and M23C6 carbides and the Laves phase is almost always tied up to the M23C6 particles.关键词
P92钢/蒸汽管道/焊缝/显微组织/蠕变裂纹扩展速率Key words
P92 steel/steam pipe/welding seam/microstructure/creep crack growth rate分类
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王环丽,洪鼎华,李武平,蔡文河,董树青,尤伟芳,刘茂生,曾燕屏..显微组织对P92钢蒸汽管道焊缝区蠕变裂纹扩展速率的影响[J].压力容器,2017,34(10):14-19,6.
