采用钛基非晶态钎料真空钎焊Ti65高温钛合金  

Vacuum brazing of Ti65 high temperature titanium alloy with titanium based amorphous brazing filler

作　　者：梅俊 祁焱[1] 徐立红[1] 赵磊[1] 臧岩[1] MEI Jun;QI Yan;XU Lihong;ZHAO Lei;ZANG Yan(Central Iron and Steel Research Institute Co.,Ltd.,Beijing 1o0o81,China)

机构地区：[1]钢铁研究总院有限公司,北京100081

出　　处：《金属功能材料》2024年第1期126-131,共6页Metallic Functional Materials

摘　　要：为了实现高温钛合金Ti65的高质量钎焊连接,采用真空快淬技术制备了以锆元素为变量的3种成分的钛基非晶态钎料,并根据3种钎料的最佳焊接工艺对Ti65进行了钎焊。采用扫描电子显微镜分析了3种钎料钎焊接头的微观组织与元素分布特征,并对比分析了接头室温和650℃拉伸性能。试验结果表明:3种钎料表面质量良好,无孔洞,均能实现Ti65连接,接头主要为片层状魏氏组织,但是Ti-13Zr-Cu-Ni钎料,存在连续的化合物相。力学性能结果表明,3中钎料的室温和650℃高温拉伸性能均能达到母材拉伸强度的90%以上,Ti-13Zr-Cu-Ni钎料的室温拉伸强度略低,断裂主要发生在接头界面处,表现为脆性断裂,Ti-Cu-Ni钎料室温和650℃高温拉伸试样断裂均发生在母材,呈现出与基体等强的力学性能。In order to achieve high-quality brazing connection of high-temperature titanium alloy Ti65, three components of Ti-based amorphous brazing filler with Zr as the variable were prepared using vacuum rapid quenching technology, and Ti65 was brazed according to the optimal welding process of the three brazing filler. The microstructure and element distribution characteristics of three types of brazing joints were analyzed using scanning electron microscopy, and the tensile properties of the joints at room temperature and 650 ℃ were compared and analyzed. The experimental results show that the three types of brazing filler have good surface quality and no pores, and can achieve Ti65 brazing connection. The joint is mainly composed of layered Widmannstatten structure, but there is a continuous compound phase in Ti-13Zr-Cu-Ni brazing filler. The mechanical performance results show that the room temperature and 650 ℃ high temperature tensile properties of the three brazing filler can reach over 90% of the tensile strength of the base material. The room temperature tensile strength of Ti-13Zr-Cu-Ni brazing material is slightly lower, and the fracture mainly occurs at the joint interface, exhibiting brittle fracture. The fracture of the Ti-Cu-Ni brazing material room temperature and 650 ℃ high temperature tensile sample occurs at the base material, showing mechanical properties equivalent to the matrix.

关 键 词：钛基非晶态钎料 Ti65 高温钛合金 真空钎焊 

分 类 号：TG454[金属学及工艺—焊接]