Method for marking steel and aluminum alloys
AssigneeThe University of Tennessee Research Corporation
InventorsMARY HELEN MCCAY, T. DWAYNE MCCAY, JOHN A. HOPKINS, NARENDRA B. DAHOTRE, C. MICHAEL SHARP, JOHN BRICE BIBLE, FREDERICK A. SCHWARTZ
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Abstract
The present invention relates to a method for marking metallic alloys using laser alloying. Specifically, the present invention is directed toward the use of laser alloying steel or aluminum alloys with a mark that provides protection against wear and corrosion and greater permanency.
Claims20
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 a laser beam at a sufficient energy level and for a sufficient time to produce a corrosion or wear resistant alloyed apron on said substrate while said substrate is moved relative to said laser beam;
- and
- c. marking the apron with a laser beam to produce a preselected marking on said apron.
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 50-75 microns;
- and
- b. irradiating the surface of the substrate with a laser beam in a preselected pattern at a sufficient energy level and for a sufficient time to produce a preselected marking on the substrate having enhanced wear or corrosion resistance.
The method of claim 14 wherein said powder comprises chromium or silicon carbide.
A method for laser marking of steel or aluminum alloys, comprising:
- a. applying a layer of precursor comprising a binder and metallic or ceramic powder to a steel or aluminum substrate, said layer having a thickness in the range of 50-250 microns;
- b. irradiating the surface of the substrate with a laser beam at a sufficient energy level and for a sufficient time to produce a corrosion resistant alloyed apron on said substrate while said substrate is moved relative to said laser beam;
- c. directing a shielding gas at the region of the substrate being irradiated by the laser beam;
- and
- d. marking the apron with a laser beam to produce a preselected marking on said apron.
Dependencies are inferred from the claim text.