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 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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
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