基于高频感应钎焊的TC4钛合金层积成形研究

Research on Laminated Forming of TC4 Titanium Alloyby High Frequency Induction Brazing

摘要:

为研发一种以TC4薄板直接作为金属造形材料的快速成形技术,选用自制的Ti基快冷薄带钎料,结合高频感应钎焊技术,制备了层积成形试样。通过对试样的力学性能、钎焊接头界面的显微组织进行分析,结果表明,由非晶态钎料制备的层积成形试样拉伸强度高于TC4,而晶态钎料的低于TC4。两种钎料成形试样的钎焊接头组织均由(Ti,Zr)2(Cu,Ni)+(Ti,Zr)ss共晶组织和富Zr的a-Ti固溶体构成,钎缝的拉伸断口呈人字纹形貌,为脆性断裂。

Abstract:

In order to explore a new rapid prototyping technique using TC4 alloying sheet as molding material, the laminated forming samples were prepared with self-made Ti-based rapidly solidified brazing ribbons by means of high frequency induction brazing technology. The tensile strength and interfacial microstructure of the brazed joints were examined and analyzed. The results shows that the tensile strength of the amorphous forming sample is higher than TC4, while the crystalline one is lower than TC4, both of the brazed joints consist of (Ti,Zr)2(Cu,Ni)+(Ti,Zr)ss eutectic, Zr-rich solid solution of a-Ti. The tensile fracture shows that the fractures in the joints is brittle with herringbone.