Effect of the intermediate layer on the properties of a coating of 50KhFA steel produced by electrical resistance welding

Abstract

The results of investigations of deposition of a coating of 50KhFA steel (0.46–0.54% C, 0.80–1.10% Cr, and 0.15% V) on shafts of steel 45 through an intermediate layer produced from a powder material and an amorphous strip brazing alloy are presented. It is shown that at the optimum combination of the parameters of electric resistance surfacing the bonding strength of the coating with the component is identical with that of the parent metal, the microhardness of the coating equals 6900–8100 MPa, the length of the zone of the thermomechanical effect does not exceed 0.35–0.6 mm, and the impact toughness and fatigue strength decrease by no more than 10% in comparison with steel 45 in the initial condition.

Keywords:

• intermediate layer
• welding
• microhardness
• zone of thermal influence
• covering
• basic metal