采用Ti-15Cu-15Ni钎料的TiAl/42CrMo钢接头组织及形成机理

Microstructure and Bonding Mechanism of TiAl/42CrMo Steel Joints Using Ti-15Cu-15Ni Filler Metal

采用Ti-15Cu-15N i钎料对TiA l基合金与42CrMo钢进行真空钎焊连接。利用扫描电镜、能谱等分析方法研究TiA l/42CrMo钢接头的组织及成分分布。结果表明,TiA l/42CrMo钢接头中分别在TiA l基合金母材和42CrMo钢附近形成过渡反应层区,钎缝中出现Ti-A l,Ti-Cu(N i),Ti-Fe等相。简单阐述接头的形成机理。

Ti-15Cu-15Ni was chosen as filler metal for TiAl/42CrMo steel vaccum brazing.The Microstructure and composition distribution of TiAl/42CrMo steel were examined by SEM and EDS.The results showed that the transitional interaction layer was formed at the interface close to TiAl and 42CrMo steel because of interdiffusion and interaction between the filler metal and the base metals.Ti-Al,Ti-Cu(Ni) and Ti-Fe were formed in TiAl/42CrMo steel joint.The bonding mechanism was discussed.