Abstract
Friction surfacing, a solid state joining process similar to Friction Stir Welding (FSW), has not received much attention in the repair and modification of pipe and/or roll surfaces. It is well-known that both friction surfacing and FSW are two of several friction variants and that the operating parameters and deposited metal characteristics of the two processes are similar. This experimental work describes the fundamental parameters for friction surfacing AISI 316L austenitic stainless steel plates with AISI 440C quench-hardened, martensitic stainless steel and shows that lower speeds of rotation form more uniform overlays. Based on results of a series of plate experiments, friction surfacing of an 89.1 mm-diameter, AISI 316L pipe along its full circumference with an AISI 440C steel rod was successfully carried out. Since the overlaid metal obtained by friction surfacing has a very fine grain size and is not diluted by the base metal, improvements in toughness, corrosion resistance and wear resistance can be expected.
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