Tribological properties of arc sprayed coatings obtained from FeCrB and FeCr-based powder wires

The technology of wear resistant coatings and new powder wire composites has been developed. New coatings with low porosity and small grains were obtained by arc-spraying of FeCrB+Al and FeCr+Al+C powder wires in a steel cover. A modified arc spraying torch was used. The initial phase contents of coatings and their changes in the subsurface region during friction processes were studied by X-ray diffractometry (XRD). Wear tests with the block-on-ring configuration at boundary lubrication and friction in an abrasive-oil mixture under normal pressure at 5 MPa have been performed. Results for sprayed coatings of both systems showed their high wear resistance.