TC11钛合金零件的激光熔化沉积修复研究  

Research on Repair of TC11 Titanium Alloy Components by Laser Melting Deposition Process

作　　者：宫新勇[1] 刘铭坤[1] 李岩[1] 张永忠[1] 

机构地区：[1]北京有色金属研究总院复合材料中心,北京100088

出　　处：《中国激光》2012年第2期79-84,共6页Chinese Journal of Lasers

基　　金：国家973计划(2011CB606305);国家自然科学基金(50871023)资助课题

摘　　要：结合飞机起动机钛合金叶轮的修复需要,研究了Ti-6Al-3.5Mo-1.8Zr-0.23Si(TC11)钛合金激光熔化沉积修复工艺及界面的组织与力学性能。结果表明,激光熔化沉积TC11钛合金及界面重熔区具有典型的魏氏组织特征,基体热影响区组织逐渐由魏氏组织向双态组织过渡;激光熔化沉积TC11钛合金的抗拉强度高于界面过渡区及基体,而塑性稍低于基体。通过采用逐点熔化沉积的方法对叶轮受损叶片进行了修复,经加工检验后通过了超转试验考核,实现了装机应用。To repair the titanium alloy impeller for airplane starter,laser melting deposited Ti-6Al-3.5Mo-1.8Zr-0.23Si（TC11） titanium alloys,as well as the microstructure and properties of the interface,are investigated.The results indicate that the deposited TC11 titanium alloys and the interfacial re-melted layer present a typical Widmansttten structure and the heat affected zone（HAZ） within the substrate changes gradually from Widmansttten to duplex microstructure.Compared to the interface transition zone and the substrate,the as-deposited TC11 alloy possesses higher tensile strength and lower ductility.The damaged impeller blades are repaired by laser melting deposition in a point-by-point way.After machining and checking,the repaired impeller passes the over speed test and comes into real use.

关 键 词：激光技术 激光熔化沉积 修复 TC11钛合金 显微组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]