摘要
用保护膜防护 ,并施加一定压力可实现Ti/Cu/Ti氧 -乙炔焰加热扩散钎焊。通过BSE(背散射电子衍射 )、EDS(电镜线扫描 )、拉伸试验等测试手段对Ti/Cu/Ti钎焊接头组织、成分及结合强度测定的结果表明 ,在试验温度下 ,接头中Cu、Ti之间发生了剧烈的扩散。加热温度为 84 0～ 870℃时 ,钎缝界面中部组织由Cu4Ti与Cu(Ti)固溶体组成 ,结合强度较高。加热温度为 870～ 90 0℃时 ,钎缝界面中部组织由CuTi与Cu4Ti+Cu(Ti)固溶体组成 ,结合强度较低。钎焊结合强度与加热温度相关。
Ti/Cu/Ti diffusion brazing, which is heated with oxygen-acetylene flame and pressed simultaneously, is realized under protection of the coating. The measurement results of interfacial microstructure, composition and cohesion strength of joint by backscattered electron, energy dispersive spectroscopy and tensile test indicate that full diffusion occurs between Cu and Ti in the joint within the test temperature range. In the temperature range from 840°C to 870°C, the microstructure consists of Cu4Ti and Cu(Ti) (solid solution) in the middle part of the joint and the cohesion strength is relative high. In the temperature range from 870°C to 900°C, the microstructure is composed of CuTi and Cu4Ti + Cu(Ti) (solid solution) in the middle part of the joint and the cohesion strength is relative low. The cohesion strength has something to do with heating temperature.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2004年第4期15-18,共4页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目 ( 5 0 3 710 60 )
山西省自然科学基金资助项目 ( 2 0 0 410 60 )
关键词
钛
铜箔
扩散钎焊
氧-乙炔焰
界面
背散射电子衍射
电镜线扫描
拉伸试验
Acetylene
Energy dispersive spectroscopy
Interfaces (materials)
Metal foil
Metallographic microstructure
Solid solutions
Titanium
