在役15Cr1Mo1V钢再热蒸汽管道焊接接头组织及性能分析  

Analysis on Microstructure and Performance of In-service 15Cr1Mo1V Steel Reheat Steam Pipe Welded Joint

作　　者：张磊 王艳松 刘福广[2] 袁树斌 米紫昊[2] 巴特尔 ZHANG Lei;WANG Yansong;LIU Fuguang;YUAN Shubin;MI Zihao;BA Teer(Yimin Power Plant of Huaneng Yimin Coal Power Co.,Ltd.,Hulunbuir 021130,China;Xi'an Thermal Engineering Research Institute Co.,Ltd.,Xi'an 710054,China)

机构地区：[1]华能伊敏煤电有限责任公司伊敏电厂,内蒙古呼伦贝尔021130 [2]西安热工研究院有限公司,陕西西安710054

出　　处：《热加工工艺》2024年第15期66-68,76,共4页Hot Working Technology

摘　　要：以某电厂在役的15Cr1Mo1V钢再热蒸汽管道焊接接头为研究对象,对其显微组织、硬度、室温和高温拉伸性能进行了分析。结果表明:再热蒸汽管道焊接接头热影响区和焊缝区的晶内及晶界处有颗粒状的析出物,接头组织出现老化现象。管道焊接接头热影响区和焊缝区的硬度较高,增加了管道脆性失效的风险。室温与高温拉伸结果表明焊缝的强度高于母材,塑性略低于母材,说明无论在室温还是高温环境下焊缝优先失效的风险均较低。Taking the welded joint of 15Cr1Mo1V steel reheat steam pipe in service in a power plant as the research object,its microstructure,hardness,room temperature and high temperature tensile properties were analyzed.The results show that there are granular precipitates in grains and at grain boundary of the heat affected zone and weld zone of the reheat steam pipe welded joint,and the aging phenomenon appears in the joint structure.The hardness of the heat affected zone and weld zone of the pipeline welded joint is higher,which increases the risk of brittle failure of pipeline.The room temperature and high temperature tensile results show that the strength of the weld zone is higher than that of the base metal,and the plasticity of the weld zone is slightly lower than that of the base metal,indicating that the risk of preferential failure of the weld zone is low no matter at room temperature or at high temperature.

关 键 词：蒸汽管道 焊接接头 显微组织 力学性能 

分 类 号：TG406[金属学及工艺—焊接]