钛-铜-不锈钢扩散复合管界面组织与性能  

Microstructure and properties of diffusion bonded interface of titanium-copper-stainless steel composite tube

作　　者：刘德义[1] 苗佳[1] 任瑞铭[1] 

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《材料热处理学报》2013年第12期125-129,共5页Transactions of Materials and Heat Treatment

基　　金：辽宁省教育厅高等学校科学研究计划资助项目(2008104)

摘　　要：采用304不锈钢钢管作为基层,工业纯钛管作为覆层,纯铜箔作为中间层,用拉拔-内压扩散方法制备钛/铜/不锈钢复合管。利用光学显微镜、扫描电子显微镜、能谱仪和X射线衍射仪对界面组织、化学成分、断口形貌和组成相进行分析。通过硬度和剪切试验测定界面的显微硬度和剪切强度。结果表明,钛/铜、铜/不锈钢界面发生了原子互扩散,并在钛/铜界面形成了不同层次的过渡组织。850℃时,中间层铜可以有效地阻止钛、铁生成脆性金属间化合物。界面显微硬度值随着扩散温度的升高而增大;剪切强度随着扩散温度的升高先增加后降低。The composite tube of commercial pure titanium and stainless steel 304 （SS） was prepared by drawing and inner pressure diffusion technique using copper foil as an interlayer. The interface microstructure, chemical composition, fracture morphology and phases were measured by OM, SEM, EDS and XRD. The shear strength and microhardness near the interface were tested by shear and microhardness tests. The results show that the elemental diffusion occurs at the interfaces of Ti/Cu and Cu/SS, and different transition products form at the Ti/Cu interface. Copper interlayer can effectively prevent elements Ti and Fe from forming brittle intermetallic compounds at 850 ℃. The microhardness of the interface increases, and the shear strength of the interface first increases and then decreases with the rising diffusion temperature.

关 键 词：钛-不锈钢 铜中间层 扩散复合 组织与性能 

分 类 号：TG142.71[一般工业技术—材料科学与工程]