Patent ID: 6497985
Filing Date: 2002-12-24
Classification: B21C,B23K,B41M,Y10S

Abstract:
A method for laser marking of metallic alloys, comprising:a. applying a layer of precursor comprising a binder and metallic or ceramic powder to a metallic substrate, said layer having a thickness in the range of 50-250 microns; b. irradiating the surface of the substrate with an alloying nonpulsed laser beam at a laser power density of 45-55 kilowatts/cm2 while said substrate is moved relative to said laser beam at a translation rate in the range of 500-9000 millimeters per minute to produce a corrosion resistant alloyed apron on the substrate; and c. marking the apron with a marking laser beam to produce a pre-selected marking on said apron.