Joining and shaping fit of dissimilar materials by shot peening

In this study, joining and shaping fit of dissimilar materials by the shot peening process was investigated. In this process, two kinds of shot peening machines, a compressed-air type and a centrifugal type, were employed. To join dissimilar materials efficiently on the surface of a cylindrical substrate, the shot peening equipment with a heating furnace and masking plate was fabricated. The influence of processing conditions on the joining between dissimilar material and the cylindrical substrate was examined. Joining of dissimilar materials using shaping fit was also performed. The bonding force increases with increasing kinetic energy of the shots and processing temperature. It was found that the present method using the peening droop was effective for joining dissimilar materials.