Patent ID: 6811899
Filing Date: 2004-11-02
Classification: C23C,Y10S,Y10T

Abstract:
A coated tool in use in warm-and/or-hot working with a superior galling resistance property and a superior wear resistance, comprising:a base material selected from the group consisting of a hot die steel and a high speed steel; and a coating as a working surface, said coating having: a layer â€œaâ€  provided on said base material, said layer â€œaâ€  being made of at least one substance selected from the group consisting of a nitride, a carbide and a carbonitride, each of which contains as the main constituent thereof at least one metal element selected from the group consisting of Ti, V, Cr, Al and Si; and a layer â€œbâ€  provided on said layer â€œaâ€ , said layer â€œbâ€  being made of a sulfide, further comprising a layer â€œcâ€  having a surface roughness Rz of 4 to 15 &mgr;m, said layer â€œcâ€  being an outermost layer of the coating.