新型高温高压汽轮机汽封片材料选用分析  

Analysis on materials selection of Gland sealing for high-pressure turbine

作　　者：赵小董[1] 周汉杰[1] 何成[1] 

机构地区：[1]杭州汽轮机股份有限公司,浙江杭州310022

出　　处：《机电工程》2015年第7期942-945,共4页Journal of Mechanical & Electrical Engineering

基　　金：浙江省科技厅优先主题重大工业资助项目(2008C01063)

摘　　要：针对国内新型高温高压汽轮机汽封片在高温环境下长期工作时容易出现高温蠕变、腐蚀,进而产生汽封片崩裂脱落造成汽轮机效率降低甚至出现运行事故的问题,对国内新型高温高压汽轮机汽封片选用的几种不锈钢材料从金属材料学方面进行了对比分析,并结合国际上在高温高压汽轮机汽封片材料选用方面的先进研究与应用,专门探讨了多种奥氏体不锈钢和马氏体不锈钢的材料特点,研究分析了不同不锈钢材料对新型高温高压汽轮机汽封片工作环境的适用性。研究结果表明,奥氏体不锈钢06Cr18Ni11Ti较1Cr18Ni9Ti和06Cr19Ni10更适合作为新型高温高压汽轮机汽封片选用材料,如果在条件允许的情况下,选用回火索氏体不锈钢,如X20Cr Mo13或者类似化学成份的马氏体不锈钢,作为新型高温高压汽轮机汽封片是目前最优选择。Aiming at the problems of the Gland sealing of the high pressure steam turbine occurred creep or corrosion easily and the high pressure turbine efficiency was decreased even running accidents because of the Gland sealing damaging and coming off,the different stainless steel materials for Gland sealing of the high pressure steam turbine were investigated and analyzed,after the analysis of the several stainless steel materials＇ performances when it was worked in high pressure condition for a long time,and combined with the international experience of advanced research and application. The result show that the austenitic stainless steel 06Cr18Ni11 Ti is more suitable for Gland sealing of the high pressure steam turbine comparing with 1Cr18Ni9 Ti and 06Cr19Ni10,but the tempered sorbite stainless steel（ such as X20 Cr Mo13 or similar chemical composition of the martensitic stainless steel） as Gland sealing of the high pressure steam turbine is the best choice at present.

关 键 词：迷宫式密封 汽封片 奥氏体不锈钢 敏化温度 马氏体不锈钢 回火索氏体 

分 类 号：TH14[一般工业技术—材料科学与工程] TG142.1[机械工程—机械制造及自动化]