Joining of spheroidal graphite cast iron an copper alloy using combustion synthesis reaction

摘要

Joining of copper alloys on spheroidal graphite cast irons is important to enhance the wear resistance of sliding parts. Although the joining is attempted by brazing, inserting, or others, these method have many technical problems. Thus we try tojoin a spheroidal graphite cast iron and a copper alloy by using Ni/Al mixed compacts, as insert materials, which take place combustion synthesis reaction. As a result, we succeeded in joining a spheroidal graphite cast iron and a copper alloy at 1023 K,and succeeded even at a lower temperature of 923 K. Advantages inherent to the SHS process for joining include the lower temperature and the shorter time in joining, as compared with conventional diffusion joinings.