V/Nb复合中间层热等静压扩散连接钢/钨接头的组织与性能  

Microstructure and properties of hot isostatic pressing diffusion bonding steel/tungsten joint with V/Nb composite interlayer

作　　者：陈帅[1] 王玥 杨健[1] 黄继华[1] 陈树海[1] CHEN Shuai;WANG Yue;YANG Jian;HUANG jihua;CHEN Shuhai(University of Science and Technology Beijing,School of Materials Science and Engineering,Beijing 100083,China)

机构地区：[1]北京科技大学,北京100083

出　　处：《焊接学报》2020年第11期47-53,I0003,I0004,共9页Transactions of The China Welding Institution

基　　金：装备预研领域基金项目(61409230503)。

摘　　要：采用V/Nb复合中间层成功实现了钢/钨热等静压扩散连接,并对高温低压(1050℃,20 MPa)和低温高压(950℃,100 MPa)条件下形成的接头界面结构及连接强度进行了探究.结果表明,高温低压组和低温高压组接头均呈W/Nb/V/钢四层结构,抗剪强度分别为96.9 MPa和104.2 MPa,断裂位置均为无明显化学反应发生在Nb/V界面.与高温低压组相比,降低连接温度并提高连接压强在一定程度上有助于形成高致密度的连接接头,但不能促进薄弱界面(Nb/V)的元素扩散并显著提高接头的连接强度.In this paper,steel and tungsten were successfully bonded using hot isostatic pressing diffusion bonding with V/Nb composite interlayer.The interface structure and shear strength of the joints under high temperature-low pressure process(1050℃,20 MPa)and low temperature-high pressure process(950℃,100 MPa)were investigated separately.The results show that the joints under high temperature-low pressure process and low temperaturehigh pressure process both have a W/Nb/V/steel four-layer structure and the shear strengths of the joints are 96.9 MPa and 104.2 MPa respectively.The fracture of the joints all appears at the Nb/V interfaces with no obvious chemical reaction.Compared with the joint under high temperature-low pressure process,reducing the bonding temperature and increasing the bonding pressure will benefit to form a dense joint,but will not promote the diffusion of elements at the weak interface(Nb/V)and significantly increase the shear strength of the joint.

关 键 词：热等静压 扩散焊 钢 钨 复合中间层 

分 类 号：TG401[金属学及工艺—焊接]