摘要
燃气轮机叶片由于长期受磨损、冲击、高温燃气和冷热疲劳等作用,容易产生腐蚀、裂纹、变形和凹坑缺陷。综述了目前常用的燃气轮机叶片修复再制造技术,包括熔焊、钎焊等,重点介绍了新近发展的一种先进材料表面求原重构完型的工艺方法———粉末冶金修复技术。它与常规的熔焊修复和钎焊方法相比具有修复强度高、界面冶金结合、可批量处理、修复效果佳等优势。我国自主研制的C-PM(China powder metallurgy)修复技术也可与国际上的粉末冶金技术媲美。
Gas turbine blades frequently cast from Ni-based superalloys, are part of engine component that directly experiences harsh engine conditions. The gases at high temperature and high pressure in the turbine engine may lead to hot corrosion, cracks and oxidation of the exposed surface of the turbine blades. Many advanced remanufacture techniques for GT are investigated, such as welding and brazing. An advanced remanufacture method-powder metallurgy remanufacture technique is introduced in detail. Compared with general restoration techniques of welding and brazing, the remanufactured area is with high strength, metallurgical bonding to substrate alloy with powder metallurgy method. C-PM（China powder metallurgy）, a new remanufacture method researched at home,is ourselves technique which can be compared with powder metallurgy restoration techniques abroad.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2010年第5期110-113,共4页
Materials Reports
基金
国家自然科学基金资助项目(50671116)
关键词
燃气轮机
叶片
粉末冶金
修复
高温合金
gas turbine, blade, powder metallurgy, remanufacture, superalloy
