Additional active metal Nb in Cu-Ni system filler metal for brazing of TIC cermet/steel

作者：Li Jia; Sheng Guangmin^*; Huang Li

来源：Materials Letters, 2015, 156: 10-13.

DOI：10.1016/j.matlet.2015.04.126

• Brazing
• Ceramics
• Cu-Ni-Mn-Nb
• Thermal analysis
• Microstructure

A Nb containing Cu-Ni-Mn brazing filler was developed for the joining of TiC cermet to steel. Interfacial microstructural investigations of the brazed joint and associated thermodynamic analysis of TiC and niobium carbides were carried out. It was found that Nb was thermodynamically favorable in promoting the decomposition of the TiC, and thus facilitated the TiC/filler interfacial reaction. A transition zone (similar to 5 mu m) consisting of Nb2C/Nb6C5/alpha Ti was formed at the filler/TiC interface, indicating a robust metallurgical bonding was achieved. Maximum shear strength of 92.5 MPa was approached, which indicated that the Cu-Ni-Mn-Nb was highly promising for the joining of TIC to steel.

• 出版日期2015-10-1
• 单位重庆大学