摘要
本实验研究不同热处理工艺对哈氏合金X焊接接头组织和力学性能的影响,分析焊后热处理对哈氏合金X焊接接头性能的影响规律。结果表明:焊缝中心区域组织主要以等轴晶为主,熔合区以枝晶为主。经1050℃热处理的焊缝未析出二次相,经1100℃处理的焊缝在晶界处与晶粒内析出大量二次相,经1150℃处理的焊缝析出物发生重溶。经1150℃热处理工艺后接头抗拉强度最高达773.49 MPa;经1100℃处理的焊接接头断裂形式为沿晶脆性断裂,其他焊缝接头的断裂形式为韧性断裂。
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 show that the central area of the weld is mainly composed of fine equiaxed grains,and the fusion zone is dominated by dendrites.The secondary phase is not precipitated in the weld joints heat treated at 1050°C,while a large number of secondary phases are precipitated in the grains at the grain boundary at 1100°C.The secondary phase at 1150°C are partly redissolved.The tensile strength of the joint reaches up to 773.49 MPa after heat treatment at 1150°C.The joint treated at 1100°C shows intergranular fracture,while the rest exhibit ductile fracture.
作者
孙宇博
靳朋礼
马锦晖
和晶
崔景豪
周可人
崔梦茜
丁坤英
Sun Yubo;Jin Pengli;Ma Jinhui;He Jing;Cui Jinghao;Zhou Keren;Cui Mengxi;Ding Kunying(Civil Aviation University of China,Tianjin 300300,China;Tianjin Key Laboratory of Civil Aircraft Airworthiness and Maintenance,Tianjin 300300,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第9期3029-3034,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51501222)
民航局重大专项(MHRD20160106)
大学生创新创业项目(IECAUC2017038)
关键词
哈氏合金X
TIG焊接
热处理
微观组织
力学性能
Hastelloy X
TIG welding
heat treatment
microstructure
mechanical properties
