POSCO Holdings Inc.
Gold-colored steel sheet and manufacturing method thereof

Abstract:

The present invention discloses a gold-colored steel sheet capable of expressing color without peeling of a modified layer and the gold-colored steel sheet capable of forming a color-modified layer through a conventional annealing process without expensive facilities. A method of manufacturing the gold-colored steel sheet according to an embodiment of the present invention can form a TiN modified layer on a surface of a steel sheet comprising 0.3 to 1.5 wt % of titanium (Ti) by an annealing treatment in a nitrogen (N.sub.2) atmosphere at 900 to 1,200.degree. C. for 30 to 300 seconds.