650℃先进超超临界锅炉高温部件选材探讨  

Discussion on Material Selection of High-temperature Components for 650℃Advanced Ultra-supercritical Boilers

作　　者：敬仕煜 何小明 张玮 谢逍原 王林森 曾辉 杨华春 Jing Shiyu;He Xiaoming;Zhang Wei;Xie Xiaoyuan;Wang Linsen;Zeng Hui;Yang Huachun(Laboratory for High Temperature and High Pressure Materials&Welding Engineering for Machinery Industry,Dongfang Boiler Group Co.,Ltd.,Zigong 643001,Sichuan Province,China)

机构地区：[1]东方电气集团东方锅炉股份有限公司机械工业高温、高压材料与焊接工程实验室,四川自贡643001

出　　处：《发电设备》2023年第5期310-316,共7页Power Equipment

摘　　要：基于国内600℃超超临界(USC)锅炉高温部件用材情况,提出并阐释了650℃先进超超临界(A-USC)锅炉选材的主要考虑因素。结合国内外锅炉用先进材料的研发现状,从材料经济性、许用应力、焊接性能、纳入标准、材料供应安全、集箱和管道用材特殊性等多方面,综合对比了几种重点候选材料。结果表明:国内650℃A-USC锅炉高温受热面材料可以选择Sanicro25(C-HRA-5)先进奥氏体耐热钢或HT700T合金,集箱、管道材料可以选择HT700P或GH984G合金。关于锅炉用高温合金的研究目前仍不够成熟,建议进一步研究候选材料用于集箱、管道的安全性问题和工程应用的标准化问题等,并且持续积累材料的高温持久强度数据。Based on the material application of high-temperature components in domestic 600℃ultra-supercritical(USC)boilers,the main factors of material selection of 650℃advanced ultra-supercritical(A-USC)boilers were proposed and illustrated.Combined with the research and development circumstance of domestic and abroad advanced materials for boilers,several key candidate materials were comprehensively compared from following aspects,such as the material economy,allowable stress,welding performance,inclusion criteria,safety of material supply,and material peculiarity of headers and tubes.Results show that,for domestic 650℃A-USC boilers,Sanicro25(C-HRA-5)advanced austenitic heat-resistant steel or HT700T alloy can be applied to high temperature heating surfaces,and HT700P or GH984G alloy can be applied to headers and tubes.The research about boiler high-temperature alloy is not mature enough at present,therefore it is suggested that further researches can be carried out on the safety issues of candidate materials used in headers and tubes,as well as the standardization issues of engineering applications,while the endurance strength data of materials at high-temperature can be accumulated continuously.

关 键 词：超超临界锅炉 镍基合金 许用应力 经济性 选材 

分 类 号：TM621.25[电气工程—电力系统及自动化]