The technology of powder metallurgy for stainless steels has been highlighted due to its economic advantages.The progress of sintering mechanism and technologies for sintering stainless steels are introduced in this paper.Finally,effect of element addition on the properties of sintered stainless steels is also presented.
In this work, effect of Cu-electroless plating on stainless steel powder on microstructure and corrosion behaviour of sintered stainless steel was investigated. Stainless steel powder containing Cu (1-5wt%) was prepared using the electroless Cu-plating methods. It was found that Cu-electroless plating of 1-5wt% diffuses into stainless steel matrix more uniform and renders a less porous surface with isolated pores than that of the sintered stainless steel fabricated by mixing Cu powder with stainless steel powder, thus improving the density of sintered stainless steel. Potentiodynamic polarization measurements indicate that Cu-electroless plating of 1-5wt% improves the corrosion resistance of sintered stainless steel.
