钎焊工艺对钛钎焊石墨与TZM合金接头组织性能的影响  

Effect of brazing technology on structure and property of brazed joint between graphite and TZM alloys with Ti filler

作　　者：徐庆元[1] 李宁[2] 熊国刚[1] 张伟[2] 赵伟[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900 [2]四川大学制造科学与工程学院,成都610065

出　　处：《焊接学报》2006年第7期37-40,共4页Transactions of The China Welding Institution

基　　金：国家科技部科技型中小企业技术创新基金资助项目[2001(01C26215100574)]

摘　　要：研究了钛合金真空钎焊石墨与TZM合金过程中，钎焊温度和时间对钎焊接头组织和性能的影响。结果表明，接头组织由Ti—TiC反应层和Ti—Mo固溶体层组成。在一定范围内，随温度和时间增加，钎缝层加厚。钎焊工艺参数优化后获得厚度为30-40μm的界面反应层，70～80μm的固溶体层，接头组织均匀，界面平整。抗剪强度达到14．1MPa和15．0MPa，再熔化温度高于1600℃的使用温度，能承受从室温到1600℃剧烈的热循环作用。The effects of brazing temperature and time on the structure and property of the brazed joint between graphite and TZM alloys with Ti-based filler in vacuum were presented.The results show that the brazed joint is made up of two layers: reaction layer of Ti-TiC and solid solution layer of Ti-Mo.In some extent,the thickness of the brazing seam increases with the increasing of brazing temperature and time.After the brazing parameter being optimized,the thickness of the reaction layer is about 30-40 μm and the solid solution layer is about 70-80 μm.The structure of the brazed joint is uniform and the interface of graphite and TZM alloys is smooth.The shear-resistant strength of the brazed joint reaches 14.1-15.0 MPa.The remelting temperature is up to 1 600 ℃ and thus the brazed joint can bear the thermal cycling from room temperature to 1 600 ℃ without failure.

关 键 词：石墨 TZM合金 钎焊温度 钎焊时间 抗剪强度 

分 类 号：TG404[金属学及工艺—焊接]