Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Hard coating for glass molding and glass molding die having the hard coating
A hard coating combining excellent mold releasability with respect to glass with excellent durability at high temperature environment of 600° C. or more, and a glass molding die having the hard coating are provided. A glass molding die has a hard coating formed on a molding surface of a base. The hard coating includes one or two of W and V, and B, C and N; wherein when a composition of the coating is expressed as Wa1Va2BbCcNd, 0.1≦a1+a2≦0.5, 0.05≦b≦0.5, 0.02≦c≦0.15, 0.05≦d≦0.5, and a1+a2+b+c+d=1 are given. The hard coating can be formed on the molding surface of the base via an intermediate layer including an amorphous CrSiN film.
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
C C C Y
C03B C03B C03B Y10T
additional additional inventional additional
Kenji Hirotaka
Yamamoto Ito