钛合金和陶瓷真空钎焊接头的组织与力学性能研究  

Microstructure and Mechanical Properties of Vacuum Brazing Joint of Titanium Alloy and Ceramics

作　　者：王芝玲[1] 

机构地区：[1]江苏省徐州技师学院,江苏徐州221151

出　　处：《热加工工艺》2017年第23期232-234,共3页Hot Working Technology

基　　金：江苏省大型工程装备检测与控制重点建设实验室开放基金项目(JSKLEDC201206)

摘　　要：将钛合金、Ti基非晶活性钎料和陶瓷按三明治结构进行装配,并将装配好的试样放入真空钎焊炉中进行钎焊,对钎焊接头的微观组织和力学性能进行测试分析。结果表明:钎焊接头包括五个区域,从TC4侧到陶瓷侧依次为:TC4钛合金区、钛合金侧反应区、中间的镶嵌结构区、陶瓷侧反应层区、Si C陶瓷区;钎焊接头剪切强度和反应层的厚度密切相关,反应层过厚或过薄均会降低接头强度。因此,合理控制反应层厚度是能否得到高强度钎焊接头的关键所在。The titanium alloy, amorphous Ti based active filler metal and ceramics were assembled in sandwich structure and the assembled sample was put into vacuum brazing furnace to braze. And the microstructure and mechanical properties of the barzed joints were tested and analysed. The results show that the brazed joint is divided into five areas, which are TC4 zone, reaction zone at the side of titanium alloy, mosaic structure area in middle, reaction zone at the ceramics side and SiC ceramics zone from TC4 side to ceramics side. The shear strength of the brazed joint is closely related to the thickness of the reaction layer. Too thick reaction layer and too thin layer reduce the strength of the joint. Therefore, reasonable control of the reaction layer thickness is the key to obtain brazed joints with high strength.

关 键 词：SIC陶瓷 TC4钛合金 钎焊 剪切强度 

分 类 号：TG454[金属学及工艺—焊接]