超临界压力汽轮机固体颗粒侵蚀的表面硬化处理技术  

Surface hardening treatment technology against solid particle erosion of supercritical pressure steam turbine

作　　者：刘志江[1] 李续军[1] 刘向民[1] 

机构地区：[1]国电热工研究院,陕西西安710032

出　　处：《中国电力》2004年第2期25-28,共4页Electric Power

基　　金：国家"十五"科技攻关项目(00-318-01-02)

摘　　要：简要介绍汽轮机的固体颗粒侵蚀及其对机组安全性和经济性的危害,介绍国外为预防汽轮机通流部分的某些喷嘴和动叶固体颗粒侵蚀所采用的各种表面硬化处理技术,包括等离子喷涂和扩散渗层的现场运行经验,供我国发展高性能大容量超临界压力汽轮机及亚临界压力机组受到固体颗粒侵蚀损伤恢复其性能时参考。This paper briefs the solid particle erosion of steam turbine and its harmfulness to the safety and economics of steam turbine unit, and various surface hardening treatment technologies employed abroad to prevent some nozzles and moving blades of steam flow path of turbine from soild particle erosion, including plasma spraying, diffusion layer and operating experience on site, which may be a good refe- rence in handling the same problems occurring on large size supercritical pressure and subcritical pressure steam turbines in China.

关 键 词：汽轮机 超临界压力 固体颗粒侵蚀 表面硬化处理 汽封 通流部分 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程]