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TA12钛合金电子束焊接组织性能及残余应力分析
引用本文:付鹏飞,黄锐,刘方军,左从进.TA12钛合金电子束焊接组织性能及残余应力分析[J].焊接学报,2007,28(2):82-84.
作者姓名:付鹏飞  黄锐  刘方军  左从进
作者单位:1. 北京航空制造工程研究所,高能束流加工技术国防科技重点实验室,北京,100024
2. 成都飞机工业集团,钳焊导管厂,成都,610092
摘    要:采用电子束焊接TA12钛合金薄板焊缝表面成形良好,焊缝区以马氏体组织为主,细小的稀土相呈均匀弥散分布状态;随着距焊缝距离的增加,稀土相尺寸逐渐增大,数量逐渐减少,并逐渐趋于球形,沿接头呈一定的规律性分布.小孔法残余应力测试结果表明,垂直于焊缝方向残余应力以纵向应力主,应力呈梯度分布,横向应力较低;焊缝区为纵向拉应力区,应力峰值低于其屈服强度,横向应力为较小的压应力;沿焊缝试板中心区(±20 mm范围内)焊接残余应力分布趋于稳定.

关 键 词:TA12钛合金  电子束焊接  稀土相  残余应力
文章编号:0253-360X(2007)02-082-03
收稿时间:2006/3/28 0:00:00
修稿时间:2006-03-28

Microstructure and residual stress of TA12 titanium alloy with electron beam welding
FU Pengfei,HUANG Rui,LIU Fangjun and ZUO Congjin.Microstructure and residual stress of TA12 titanium alloy with electron beam welding[J].Transactions of The China Welding Institution,2007,28(2):82-84.
Authors:FU Pengfei  HUANG Rui  LIU Fangjun and ZUO Congjin
Affiliation:Key Laboratory of High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China,Qian Han Pipe Factory, Chengdu Aircraft Industrial Group Co., Ltd., Chengdu, 610092, China,Key Laboratory of High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China and Key Laboratory of High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China
Abstract:Weld configuration of TA12 titanium alloy is very good for electron beam welding(EBW).The main microstructure of weld is martensite,and the tiny rare earth rich phases is dispersedly distributed in the weld zone,and dimension whose configuration changes disciplinary along the joint.By hole drilling method measuring weld residual stresses,the results show that longitudinal stresses are higher than transverse stress,which present gradient distribution along the vertical direction of the weld.In the weld all the longitudinal residual stresses are tensile stresses,and whose peak stresses are lower than yield stresses,while the transverse stresses are very low pressure stresses.Along the weld direction in the central of the plate the residual stresses distributing are approximate equal.
Keywords:TA12 titanium alloy  electron beam welding  rare earth phase  residual stress
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