Abstract
Although there have been proposed and applied several surfacing technologies, no appropriate process was appeared to coat 1 mm thickness layer on substrate. This paper deals with the fundamental approach to establish friction surfacing as a technique to coat a hard layer -1 mm thick.
Experiments clarify the effect of operating parameters on surface quality using conventional friction welding machine equipped sliding stage. Material was selected a martensitic stainless steel with 1C-17Cr as a coated material, and a low carbon structural steel as a substrate.
A stable hardened coated layer was obtained with dimensions of 20 mm width and 1 mm thickness. No dilution was observed in this process. Hardness values reached around 500 to 600 Hv in as-coated condition. Dimensions of coated layer are depended on friction speed (rotating speed) of coated material, and lower friction speed can make thicker and wider coatings. Deposition speed is slightly less than those of conventional arc welding processes under the conditions of this experiment.
