Method of reinforcing aluminium alloy piston ring groove

Abstract

Disclosed is a method of reinforcing an aluminium alloy piston ring groove wherein the piston body is fused to a certain depth around the periphery thereof in the zone where the ring groove is to be cut, with simultaneous introduction of an alloying addition into the fused aluminium alloy of the piston body, thus forming an annular wear-resistant weld therein, whereupon the ring groove is cut in the periphery of said weld.

Dependencies are inferred from the claim text.