以铌+铜为复合中间层扩散焊接钛合金/不锈钢接头的组织与性能
Microstructure and Property of Diffusion Welded Titanium Alloy/Stainless Steel Joint with Nb and Cu as Composite Interlayer
摘 要
以铌片+铜片为复合中间层材料，在Gleeble-1500型热力模拟试验机上对TC4钛合金和15-5PH不锈钢进行真空扩散焊，测试了接头的抗拉强度，观察了接头界面区和拉伸断口形貌并进行了微区成分分析。结果表明：铌+铜复合中间层可以有效阻碍钛合金和不锈钢之间钛、铁、铬元素的相互扩散；不锈钢/铜、铜/铌、铌/钛合金这3个界面通过原子扩散形成良好的连接，在铜/铌界面处局部生成的少量细小的铌铁金属间化合物对接头抗拉强度的影响不大，最高抗拉强度达到540 MPa；拉伸断裂时裂纹穿过铜层、铌层和金属间化合物扩展。
15-5PH不锈钢
真空扩散焊
复合中间层
TC4 titanium alloy
15-5PH stainless steel
vacuum diffusion welding
composite interlayer
Abstract
With Nb sheet and Cu sheet as composite interlayer materials, the vacuum diffusion welding was carried out on TC4 titanium alloy and 15-5PH stainless steel on a Gleeble-1500 thermomechanical simulator. The tensile strength of the joint was tested. The morphology at the interface and of the tensile fracture of the joint was observed, and the micro area composition was analyzed. The results show that the composite interlayer of Nb and Cu was helpful to restrain the interdiffusion of Ti, Fe and Cr, which came from titanium alloy and stainless steel. The strong bonding at stainless steel/Cu, Cu/Nb and Nb/titanium alloy interfaces was formed by atomic diffusion. A small amount of fine Nb-Fe intermetallic compound was formed at the Cu/Nb interface, which had little effect on the tensile strength of the joint. The maximum tensile strength reached 540 MPa. During tensile fracture the cracks propagated through the Cu layer, the Nb layer and the intermetallic compounds.
中图分类号 TG457.1 DOI 10.11973/jxgccl201810015
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金-河南省人才培养基金联合资助项目（U1204520）；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）
收稿日期 2017/10/11
修改稿日期 2018/9/3
网络出版日期
作者单位点击查看
备注陈一帆(1992-),女,河南商丘人,硕士研究生
引用该论文: CHEN Yifan,ZHANG Zhanling,QIU Ranfeng. Microstructure and Property of Diffusion Welded Titanium Alloy/Stainless Steel Joint with Nb and Cu as Composite Interlayer[J]. Materials for mechancial engineering, 2018, 42(10): 77～80
陈一帆,张占领,邱然锋. 以铌+铜为复合中间层扩散焊接钛合金/不锈钢接头的组织与性能[J]. 机械工程材料, 2018, 42(10): 77～80
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参考文献
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【6】ZHAO D S, YAN J C, LIU Y J, et al. Interfacial structure and mechanical properties of hot-roll bonded joints between titanium alloy and stainless steel using niobium interlayer[J]. Transactions of Nonferrous Metals Society of China, 2014,24(9):2839-2844.
【7】赵东升,闫久春,王勇,等.采用铜和铌复合夹层的钛合金与不锈钢的真空热轧焊接[J].焊接学报,2006, 27(11):99-102.
【8】李鹏,李京龙,熊江涛,等.添加Ni+Nb中间层的钛合金与不锈钢扩散工艺研究[J].航空材料学报,2011,31(3):46-51.
【9】KUNDU S, GHOSH M, LAIK A, et al. Diffusion bonding of commercially pure titanium to 304 stainless steel using copper interlayer[J]. Materials Science and Engineering:A, 2005,407(1/2):154-160.
【10】KUNDU S, CHATTERJEE S. Interfacial microstructure and mechanical properties of diffusion-bonded titanium-stainless steel joints using a nickel interlayer[J]. Materials Science and Technology, 2006,425(1/2):107-113.
【11】BALASUBRAMANIAN M. Development of processing windows for diffusion bonding of Ti-6Al-4V titanium alloy and 304 stainless steel with silver as intermediate layer[J]. Transactions of Nonferrous Metals Society of China, 2015,25(9):2932-2938.
【12】刘彦峰,白佳铭,张美丽,等. TC4钛合金/304不锈钢异种材料扩散焊研究[J].兵器材料科学与工程,2017,40(3):86-90.
【13】GHOSH M, CHATTERJEE S. The effect of processing temperature on the structure and properties of the transition joint between Ti alloy and stainless steel[J]. Transactions of Indian Institute of Metals, 2003,56(3):197-203.
【14】李小强,李元元,邵明,等.加镍过渡层钛合金/不锈钢网的扩散连接技术[J].华南理工大学学报,2003,31(6):51-54.
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