中国激光, 2012, 39 (2): 0203005, 网络出版: 2012-01-06
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
激光技术 激光熔化沉积 修复 TC11钛合金 显微组织 laser technique laser melting deposition repair TC11 titanium alloy microstructure
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。
Abstract
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 Widmansttten structure and the heat affected zone (HAZ) within the substrate changes gradually from Widmansttten 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.
宫新勇, 刘铭坤, 李岩, 张永忠. TC11钛合金零件的激光熔化沉积修复研究[J]. 中国激光, 2012, 39(2): 0203005. Gong Xinyong, Liu Mingkun, Li Yan, Zhang Yongzhong. Research on Repair of TC11 Titanium Alloy Components by Laser Melting Deposition Process[J]. Chinese Journal of Lasers, 2012, 39(2): 0203005.