TiZrNiCu钎料钎焊石墨与TC4接头组织与力学性能研究

Microstructure and Mechanical Properties of Graphite and TC4 Brazed Joint Using TiZrNiCu Filler Metal

在钎焊时间为60～1500s,钎焊温度1163～1273K的条件下,采用TiZrNiCu钎料对石墨和TC4钛合金进行了钎焊试验。利用扫描电镜及能谱仪对接头的界面组织进行了研究。结果表明,接头界面结构为石墨/TiC/(Ti,Zr)2(Cu,Ni)/Ti(s.s)+(Ti,Zr)2(Cu,Ni)/TC4。以抗剪强度评价石墨和TC4钛合金接头的力学性能,发现当钎焊温度为1193K,保温时间为300s时,接头抗剪强度最高,为15MPa。

Graphite and TC4 were brazed using TiZrNiCu filler metal at 1163 ～1273 K for 60 ～1500 s.The interfacial microstructure was investigated by scanning electron microscopy and electron energy spectrum analysis.The mechanical properties of the brazed joints were evaluated through shear strength.The results show that the interface microstructure of the brazed joints is graphite/TiC/（Ti,Zr）2（Cu,Ni）/Ti（s.s）＋（Ti,Zr）2（Cu,Ni）/TC4.The maximal shear strength is 15 MPa when the welding is carried out at 1193 K for 300 s.