连接温度对W/Ni/Kovar真空扩散连接接头界面结构及结合强度的影响  

Effect of Welding Temperature on the Interface Microstructure and Bonding Strength of W/Ni/Kovar Joint by Vacuum Diffusion Welding

作　　者：仵金玲 刘思雨 张彪 魏智磊 史忠旗[1] WU Jinling;LIU Siyu;ZHANG Biao;WEI Zhilei;SHI Zhongqi(State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049

出　　处：《材料导报》2024年第4期139-144,共6页Materials Reports

基　　金：国家重点研发计划项目(2018YFB0905600);陕西省自然科学基础研究计划项目(2023-JC-JQ-29)。

摘　　要：以Ni箔为中间层材料,采用真空扩散连接方法进行W与Kovar合金的连接,研究了连接温度对W/Ni/Kovar接头界面结构和剪切强度的影响。结果表明:在520~1000℃范围内,利用真空扩散连接工艺均可成功制备出W/Ni/Kovar接头样品。随着连接温度的升高,Kovar/Ni界面与Ni/W界面的扩散层厚度逐渐增加,而接头剪切强度呈先上升后下降的趋势。当连接温度为800℃时,样品的接头剪切强度高达182 MPa,此时主要发生W块体的剪切断裂。The interfacial structure and shear strength of W/Ni/Kovar joint were studied by means of vacuum diffusion bonding with Ni foil as the interlayer material.The effect of welding temperature on the interface structure and shear strength of W/Ni/Kovar joint was studied.The results show that W/Ni/Kovar joint samples can be successfully prepared by vacuum diffusion bonding process in the range of 520℃to 1000℃.The thickness of diffusion layer between Kovar/Ni interfaces and Ni/W interfaces increased gradually with the increase of welding temperature,while the shear strength of the joint increased first and then decreased.When the temperature was 800℃,the shear strength of the joint sample was up to 182 MPa.At this time,the shear fracture of W block mainly occurred in the joint sample.

关 键 词：真空扩散焊 剪切强度 钨 Kovar合金 中间层 

分 类 号：TG453[金属学及工艺—焊接]