Technologies of restoration and strengthening of cams of the crankshaft of the automobile engine

Abstract

The main factor in the restoration of the surface is the strength of the welded layer with the base material. The surfacing material must ensure reliable adhesion of the base material to the substrate, reduce the risk of chipping and concentrations of thermal stresses in the transition zones, have high physical and mechanical characteristics, the ability to strengthen treatments. OZSh-3 electrodes were used to restore the working surface of the steel 45 cams. In terms of carbon, manganese and silicon, the steel surfacing electrodes are close to the components of steel 45 and this guarantees a reliable adhesion of the surfacing layer to the base material. After application to the prepared surface of the surfacing layer, blade treatment was performed, followed by grinding to obtain the appropriate geometry and roughness. The removed layer of metal allows to remove welding defects (pores, micro cracks and other defects).