Color Mark Formation on a Metal Surface by a Highly Concentrated Energy Source

The results of a study of the influence of the parameters of laser heat-treatment of a metal surface on the formation of the color gamut in the zone of exposure to a laser beam are presented. The prospects for using laser marking of the surface of a metal part can be greatly increased by controlling the color of the applied image. The ‘color’ version of the method of laser marking can be effectively used in the metallurgical industry to protect against counterfeiting of articles made from unique essential alloys used in, for example, the aerospace industry.