摘要
针对高温合金零部件服役后出现的裂纹、磨损等损伤,可使用激光直接沉积方法进行修复。使用激光直接沉积方法,在GH738基体上沉积GH4169合金粉末,形成GH4169/GH738异种材料接头,并对其高温力学性能及组织状态进行了试验研究。试验结果表明,激光直接沉积形成的GH4169/GH738接头650℃的抗拉强度达到了1003 MPa,延伸率达到16.8%;接头熔覆界面处形成致密的冶金结合;接头高温拉伸呈现韧性断裂方式,断口形成大量的等轴韧窝。
This research investigates the use of laser direct deposition for the repair of superalloy components,focusing on the repair of damaged GH4169 alloy parts with GH738 substrates.The laser direct deposition process was utilized to fabricate a GH4169/GH738 dissimilar material joint,and an analysis of its high-temperature mechanical properties and microstructure was conducted.The results showed that the tensile strength of laser direct deposited GH4169/GH738 joint at 650℃reached 1003 MPa,and elongation reached 16.8%;dense metallurgical bonding was formed at the joint cladding interface;the fracture mode of high temperature tensile presented ductile,and a large number of equiaxed dimples were formed on the fracture surface.
作者
张万虎
王忠
胥冬琴
范德亮
乔雷
Zhang Wanhu;Wang Zhong;Xu Dongqin;Fan Deliang;Qiao Lei(Engineering Center,AECC Aero Science and Technology Co.,Ltd.,Chengdu 610503,Sichuan,China;Purchasing Center,Southwest China Institute of Electrical Technology,Chengdu 610036,Sichuan,China)
出处
《应用激光》
CSCD
北大核心
2024年第6期20-24,共5页
Applied Laser
