热处理对Ti_2AlNb/Ti60双合金接头组织及性能的影响  

Effects of heat treatment on microstructure and mechanical properties for joint of Ti_2AlNb/Ti60 dual alloys

作　　者：郭凡[1] 郭鸿镇[1] 姚泽坤[1] 田宏杰[1] 赵张龙[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072

出　　处：《锻压技术》2013年第3期137-140,共4页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51175431)

摘　　要：以连接加变形后的Ti2AlNb/Ti60双合金为对象,研究锻后不同热处理制度对双合金接头显微组织和力学性能的影响。结果表明:热处理制度对Ti60合金侧热影响区的相组成影响较小,但对相的形态、尺寸和数量具有一定的影响;随着固溶温度的升高或固溶时间的延长,双合金试样的强度增加,塑性下降;经过990℃/1h+750℃/4h热处理后的Ti2AlNb/Ti60双合金焊缝组织得到优化,强度和塑性均高于Ti60合金基体,双合金试样在室温及600℃高温均表现出较好的强度与塑性匹配。Effects of different heat treatment schemes on microstructure and mechanical properties for weld joint of Ti2A1Nb/Ti60 dual alloys after connecting and forging were investigated. The results show that： heat treatment schemes play a small role in phase composition of heat-affected zone of Ti60 alloy, but a large role in phase morpholo- gy, size and amount~ along with the increase of solution temperature or solution time, the strength of the sample in- creases while the plastic decreases~ microstrueture of weld joint of Ti2A1Nb/Ti60 dual alloys is optimized after the heat treatment scheme 990 ℃/1 hff-750℃/4 h, and the strength and the plastic are higher than that of Ti60 alloy, and good strength and plastic matching at room temperature or 600℃ high temperature are showed in Ti2A1Nb/Ti60 dual alloys.

关 键 词：Ti2AlNb/Ti60双合金 热处理 显微组织 力学性能 

分 类 号：TG166.5[金属学及工艺—热处理]