不同扩散焊工艺下以钽+铜为复合中间层的钛合金/不锈钢接头性能  

Properties of Titanium Alloy/Stainless Steel Joint with Ta+Cu Composite Interlayer by Different Diffusion Welding Process

作　　者：陈一帆 张占领[2,3] 邱然锋 CHEN Yifan;ZHANG Zhanling;QIU Ranfeng(Mechanical and Electronic Engineering Department,Zhengzhou University of Urban Construction,Zhengzhou 451263.China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Collaborative Innovation Center of Nonferrous Metals,Henan Province,Luoyang 471023,China)

机构地区：[1]郑州城建职业学院机电工程系,郑州451263 [2]河南科技大学材料科学与工程学院,洛阳471023 [3]有色金属共性技术河南省协同创新中心,洛阳471023

出　　处：《机械工程材料》2022年第6期36-43,共8页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51875177);河南省高校创新人才支持计划项目(16HASTIT050);河南省国际科技合作计划项目(162102410023);河南省高等学校青年骨干教师资助计划项目(2013GGJS-064)。

摘　　要：分别在常规工艺(20℃·s^(-1)速率升温至1000℃,保温1200 s,压力6.7 MPa,空冷)和阶梯工艺(20℃·s^(-1)速率升温至1050℃,停留2 s后以10℃·s^(-1)速率降温至950℃,此阶段压力2.8 MPa,然后在6.7 MPa压力下保温1200 s,空冷)下,以加钽+铜为复合中间层对TC4钛合金与15-5PH不锈钢进行真空扩散焊,研究了接头的组织和性能。结果表明:复合中间层可阻碍钛合金与不锈钢间元素互扩散;阶梯工艺下接头的抗拉强度为550 MPa,高于常规工艺(390 MPa),这与柯肯达尔扩散空洞小且浅、焊后复合中间层厚度较小以及铜/钽界面连接质量较高有关。TC4 titanium alloy and 15-5PH stainless steel was vacuum diffusion welded with Ta+Cu as(raise℃·s^(-1),composite interlayer under conventional process cooling)temperature to1000℃at rate of20050holding for℃·s^(-1),MPa,(raise1200s with pressure of6.7lower air and step process temperature to1℃at rate of20and s,℃·s^(-1)MPa,holding for2of then MPa temperature to950℃at rate of10with pressure of2.8the holding at a The s,200cooling).air pressure results6.7show for1The microstructure and properties of between joint were studied.alloy that the composite interlayer could prevent the element diffusion MPa,550titanium higher and stainless MPa steel.The tensile strength of the joint under step process was shallow and was than390small under process,cavity,conventional composite which was related to the small and Cu/Ta Kirkendal diffusion thickness of the interlayer and good banding quality of interface.

关 键 词：TC4合金 15-5PH钢 真空扩散焊 复合中间层 

分 类 号：TG456.9[金属学及工艺—焊接]