FGH101高温合金惯性摩擦焊接头的显微组织与力学性能  

Microstructure and Mechanical Property of FGH101 Superalloy Inertia Friction Welding Joint

作　　者：许乔郅 张国栋 袁鸿 王金雪 XU Qiaozhi;ZHANG Guodong;YUAN Hong;WANG Jinxue(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095

出　　处：《热加工工艺》2023年第23期63-66,71,共5页Hot Working Technology

摘　　要：采用惯性摩擦焊工艺实现了FGH101高温合金的连接,研究了FGH101高温合金惯性摩擦焊接头的显微组织及力学性能。结果表明:焊接接头成形良好,几乎无飞边;接头焊核区(WNZ)为细小等轴晶组织且基本没有γ’强化相,热力影响区(TMAZ)中粗细晶共存且形貌不规则;焊接接头显微硬度呈典型“M”型分布,焊核区硬度最高但其中心区域存在硬度下降现象,经过热处理后,显微硬度提升不明显;焊接接头室温抗拉强度约为1600 MPa,可达到母材的98.4%,屈服强度约为1178 MPa,可达到母材的98.6%;750℃高温抗拉强度约为1208 MPa,可达到母材的96%,屈服强度约为1037 MPa,可达到母材的96%。FGH101 superalloy was welded by inertia friction welding(IFW).The microstructure and mechanical properties of the FGH101 alloy IFW joint were studied.The results show that the joint is well formed and almost has no flash.The weld nugget zone(WNZ)of joint consists of exquiaxed grains with littleγ'strengthening phase,and coarse grains and fine grains coexist and have irregular morphology in the thermo-mechanically affected zone(TMAZ)of joint.The microhardness of the joint presents typical"M"distribution.The hardness of the WNZ of the joint is the highest and the hardness decreases in the central of the WNZ.And the microhardness improvement is not significant after heat treatment.The tensile strength of the joint at room temperature is about 1600 MPa,which is 98.4%of that of the base metal,and the yield strength of the joint at room temperature is about 1178 MPa,which is 98.6%of that of the base metal.While the tensile strength of the joint at 750℃ is about 1208 MPa,96%of the base metal,and the yield strength of joint at 750℃ is about 1037 MPa,96%of the base metal.

关 键 词：FGH101高温合金 惯性摩擦焊 显微组织 力学性能 

分 类 号：TG453.9[金属学及工艺—焊接]