Abstract
In the shot peening process, metal foil can be bonded with the base metal by applying plastic deformation and the pressure. The formation of an Fe-Al intermetallic compound film on high-speed tool steel by shot peening and heat treatment was investigated. The effect of heating temperature on intermetallic formation of pure aluminum and base material bonded by shot peening was studied. In the experiment, a centrifugal-type peening machine with an electrical heater was employed. The shot peening process of high-speed tool steel with an aluminum sheet was carried out to evaluate the characteristics of the formed film. Heat treatment was performed at diffusion temperatures from 923 to 1573K in vacuum. When the temperature of the lined substrates was more than 1173K, the surface was covered with highly anticorrosive layers of Fe-rich intermetallics. It was confirmed that the present method could be used for the formation of functional films on high-speed tool steel.
