高温钛合金Ti-55与Ti-60电子束焊接头力学性能  

Tensile performance of Ti-55 and Ti-60 joints welded by electron beam welding

作　　者：左从进[1] 李晋炜[1] 余伟[1] 许海鹰[1] 

机构地区：[1]北京航空制造工程研究所高能束流加工技术国家级重点实验室,北京100024

出　　处：《焊接学报》2011年第4期103-106,118,共4页Transactions of The China Welding Institution

摘　　要：通过研究异种材料高温钛合金Ti-55与Ti-60电子束对接焊接头的微观组织和拉伸力学性能以及焊后热处理对Ti-60接头高温拉伸与持久性能的影响,分析电子束焊接高温钛合金的适用性.采用所选择的电子束焊接工艺焊接高温钛合金,焊缝成形好,表面缺陷少.分别进行了Ti-55,Ti-60,Ti-55+Ti-60焊接接头的室温、高温拉伸力学性能检测,并且针对高温钛合金电子束焊接接头中易出现针状α′相的现象,采用了双重热处理的工艺,改善接头性能.结果表明,电子束焊接成分相近的异种高温钛合金,焊接适用性好,焊后双重热处理方法能够有效减少焊缝中针状α′相的存在,使得高温钛合金接头的高温拉伸力学性能与持久性能显著提高.The joints of high-temperature titanium alloy Ti-55 and Ti-60 are welded by electron beam welding,the microstructure and tensile performance of the joints are analyzed,and the high-temperature tensile and permanence tests of Ti-60 joints after heat treatment are developed in order to study the applicability of the joints.These high-temperature titanium joints have fine weld bead shape and less aspect weld faults.The tensile performaces of room temperature and high temperature for Ti-55,Ti-60,and Ti-55 with Ti-60 joints have been tested respectively.The results show that acerose α′ phase in high-temperature titanium alloy joints has been reduced by double heat treatment technology,the electron beam welding for different high-temperature titanium alloy weld with similar element has fine applicability,and the performance of the high-temperature titanium alloy joints has been enhanced through double heat treatment.

关 键 词：高温钛合金 电子束焊接 焊接接头 

分 类 号：TG456.3[金属学及工艺—焊接] TG457.19