Ti-22Al-25Nb合金电子束焊接及焊后热处理工艺  

The PWHT Process for Electron Beam Welded Joints of Ti-22Al-25Nb Alloy

作　　者：朱瑞灿[1] 王伟荣[1] 王国庆[2] 王炜[1] 徐雯[1] 

机构地区：[1]首都航天机械公司,北京100076 [2]中国运载火箭技术研究院,北京100076

出　　处：《航天制造技术》2013年第3期5-7,21,共4页Aerospace Manufacturing Technology

摘　　要：使用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和X射线衍射谱仪(XRD),研究了不同温度热处理后Ti-22Al-25Nb合金电子束焊接接头显微组织,对接头拉伸性能及断口分析后认为,经过850℃保温2h空冷的热处理可以有效地改善接头的室温和高温拉伸性能。The post-weld heat treatment(PWHT) parameters of 800℃,850℃and 900℃ were carried out.Aimed at the electron beam welding joints of Ti-22Al-25Nb alloy before and after the heat treatment,the tensile tests on room temperature and 650℃ were carried out.The microstructure,mechical properties of Ti-22Al-25Nb(at%) alloys welded joints were investigated by using the equipments optical microscopy(OM),scanning electron microscopy(SEM) and X-ray diffraction(XRD).The result shows that the mechanics performance of the joints with PWHT of 850℃ holding two hours followed cooling in air would get better.

关 键 词：TI-22AL-25NB合金 电子束焊接 热处理 显微组织 力学性能 

分 类 号：TG456.3[金属学及工艺—焊接] TG166