Ti-Zr-Cu-Ni-Co系新钎料的成分设计及TC4合金钎焊接头的力学性能

Design of Ti-Zr-Cu-Ni-Co System Ti-Based Brazing Alloy and Mechanical Properties of TC4 Brazed Joints

新设计了Ti-Zr-Cu-N i-Co系钛基钎料,相对于BПP16钎料,其Zr含量有所提高,而Cu,N i,Co三种合金元素的总含量低于BПP16钎料中Cu,N i的总量。在960℃/10m in的真空加热条件下,进行了两种钎料对TC4合金的熔化实验和连接实验。通过SEM和XEDS分析了接头组织和微区成分。钎焊接头力学性能试验结果表明,使用新钎料对应接头冲击韧性值为31.55 J/cm3,比BПP16钎料提高了56%,同时接头的剪切强度提高约20%。

In this paper, a Ti-Zr-Cu-Ni-Co system Ti-based brazing alloy is recently designed. Compared with BHP16 brazingalloy, Zr content in the new brazing alloy is increased to some extent, and the total amount of alloying elements Cu, Ni, and Co is lower than that of elements Cu and Ni in BHP16 brazing alloy. Melting and brazing experiments for TC4 alloy were conducted under the vacuum heating condition of 960℃/10min. The microstructures of the brazed joints were examined under SEM and the compositions of some micro-zones were analyzed through XEDS. The test results of mechanical properties of the brazed joints show that, compared with BHP16 brazing alloy, the impact roughness of the joints brazed with the new brazing foils is increased by 56% , and moreover, the shear strength is also increased by about 20% .