Surface hardening by particle injection into laser melted surface

摘要

A method of impregnating the surface of a metal substrate with wear resistant particles to impart wear resisting characteristics to the surface. The substrate surface is subjected to a relatively moving high- powered laser beam to cause localized surface melting in passes thereacross, and hard wear resistant particles are forcibly velocity injected into the melt. The particles are captured upon solidification of the melt pool and retained therein by metallurgical bond. A wear resistant layer is formed which is an integral part of the underlying material.