退火对TC18钛合金电子束焊接接头组织与力学性能的影响  

Influences of Annealing Treatment on Microstructure and Mechanical Properties of TC18 Titanium Alloy Electron Beam Welded Joint

作　　者：张思聪[1,2] 雷永平(指导)[1] 刘昕[1] ZHANG Si-cong LEI Yong-ping LIU Xin(College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124 Science and Technology on Power Beam Processes Laboratory, Beijing Aeronautical Manu{acturing Technology Research Institute, Beijing 100024, China)

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]北京航空制造工程研究所,高能束流加工技术重点试验室,北京100024

出　　处：《机械工程材料》2017年第1期30-33,共4页Materials For Mechanical Engineering

摘　　要：采用普通退火和去应力退火两种退火工艺对TC18钛合金电子束焊接接头进行焊后热处理,研究了退火处理对焊接接头显微组织、拉伸性能和冲击性能的影响,并将接头的性能与母材的进行了对比。结果表明:与去应力退火相比,普通退火后,显微组织中的α相含量减少,β相含量增多,接头的强度降低,塑性更高;两种方式退火后,母材和焊接接头的拉伸性能相差不大,但母材的冲击性能优于焊接接头的。Firstly,normal annealing and stress relief annealing were carried out on electron beam welded joint of TC18 titanium alloys,and then the effects of annealing treatments on microstructure,tensile and impact properties of the welded joint were studied;the properties of the welded joint were compared with that of the base metal.It is shown that,compared with the stress relief annealing,the content ofαphase in the normal annealed joint decreased significantly while the content ofβphase increased dramatically.Compared with the stress relief annealing,the strength of the joint adopting normal annealing was lower,while its plasticity was higher.After normal and stress relief annealing treatments,the tensile properties of base metal and welded joint were similar,but the impact property of base metal was better than that of the welded joint.

关 键 词：TC18钛合金 电子束焊接 退火处理 力学性能 

分 类 号：TG407[金属学及工艺—焊接]