焦炉尾气涡轮叶片腐蚀失效分析  

Corrosion Failure Analysis of Turbine Blades Applied in Coke Oven Gases

作　　者：赵利 张吉阜 陈文龙[2] 何翔 ZHAO Li;ZHANG Jifu;CHEN Wenlong;HE Xiang(Key Lab. of Guangdong for Modem Surface Engineering Technology, National Engineering Laboratory for Modem Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510651, China;School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China)

机构地区：[1]广东省新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室,广东广州510651 [2]广东工业大学材料与能源学院,广东广州510006

出　　处：《热加工工艺》2018年第12期259-262,共4页Hot Working Technology

基　　金：国家科技支撑计划课题项目(2014BAF08B03);广州市科技计划项目(201510010095)

摘　　要：采用扫描电镜、能谱仪和XRD研究了涡轮叶片腐蚀后的化学成分、金相组织、腐蚀形貌和腐蚀产物。结果表明,燃气中的固态粉尘对叶片的冲刷是造成叶片迎风面端部深冲蚀坑的主要原因;基体金属的高温腐蚀以硫化腐蚀为主导,同时伴随氧化腐蚀。此外,叶盆部位的硫化-氧化腐蚀效应明显,同时还有熔盐热腐蚀的发生。The chemical composition, metallographie structure, corrosion morphologies and corrosion products of turbine blades after corrosion were analyzed by SEM, EDS and XRD. The results show that the main reason for the deep corrosion pits on the windward side is the scour of the solid dust in the fuel gas to the blade. The high temperature corrosion of based metal is dominated by sulphur corrosion, which is accompanied by the oxidation corrosion. Besides, the sulphur-oxidation corrosion effect in,leaf basin area is obvious and then, the molten salt hot corrosion occurs.

关 键 词：涡轮叶片 冲刷 腐蚀 失效 

分 类 号：TG172[金属学及工艺—金属表面处理]