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孙宇博,靳朋礼 马锦晖 和晶 崔景豪 周可人 崔梦茜.热处理对哈氏合金X焊接接头组织与性能的影响[J].稀有金属材料与工程(英文),2019,48(9):3029~3034.[Sun yubo and jin pengli.Effect of Heat Treatment on Microstructure and Properties of Hastelloy X Welded Joints[J].Rare Metal Materials and Engineering,2019,48(9):3029~3034.]
Effect of Heat Treatment on Microstructure and Properties of Hastelloy X Welded Joints
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Received:April 06, 2018  Revised:May 14, 2018
Key words: Hastelloy X  TIG welding  heat treatment  microstructure  mechanical properties
Foundation item:民航局重大专项(项目号MHRD20160106);大学生创新创业项目(项目号IECAUC2017038)
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Sun yubo and jin pengli  
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      Effect of different heat treatment processes on the microstructure and mechanical properties of TIG welded Hastelloy X welded joints was studied by SEM and EDS. The results showed that the central area of the weld was mainly composed of fine equiaxed grains, and the fusion zone was dominated by dendrites. The secondary phase was not precipitated in the weld joints heat treated at 1050°C, and a large number of secondary phases were precipitated in the grains at the grain boundary at 1100°C. The secondary phase at 1150°C were partly re-dissolved. The tensile strength of joint reaches up to 773.49 MPa after heat treatment at 1150°C. The joint treated at 1100°C was intergranular fractures, the rest were ductile fractures.