钛合金高温钎焊接头的组织性能及影响因素评价

综述了钛及钛合金高温钎焊结构在现代工业中的应用。在分析了钛基钎料应用和发展的基础上，重点分析了钎焊接头的组织与接头性能的关系以及影响因素。指明接头组织中脆性金属间化合物相的存在形态是决定接头性能的主要因素，接头间隙和钎焊时间决定了接头的组织形态，从而影响接头的性能。钛及钛合金高温钎焊接头的拉伸性能、高温性能和疲劳性能是优越的，而接头氧化后的性能急剧下降。并展望了钛基材料连接的发展方向。

Review of Microstructures and Properties of High-Temperature Brazed Titanium Joints and Influential Factors

The applications of high-temperature brazed structure made of titanium and its alloy in modern industry are reviewed. On the basis of analyzing the application and development of Ti-based brazing filler materials, the relation between microstructures and properties of brazed joints and influential factors are analyzed emphatically. The analytical results show that the properties of brazed joints are strongly dependent on the formation and state of brittle intermetallic phases in the microstructure of the brazing zone. The joint clearance size and brazing time determine the microstructure state and properties of the joints. The tensile property, elevated temperature tensile property and fatigue property of high-temperature brazed titanium materials joints are excellent, but the tensile strength of preoxidized joints is strongly reduced. In this paper, the development and prospect of joining advanced Ti-based complex materials are also analyzed.