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US 9,433,998 B2Granted
Surface-treated mold and method of producing surface-treated mold
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYuichi Furukawa, Jun Yaokawa, Yasushi Iwata
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Abstract
A surface-treated mold that includes a mold, a metal layer that is provided on a surface of the mold and contains at least one metal selected from nickel, chromium, tungsten and brass, and a carbon film that is provided on a surface of the metal layer, wherein the metal layer contains carbon, and the carbon concentration in the metal layer is higher between the boundary with the carbon film and the center of the metal layer than that between the boundary with the mold and the center of the metal layer.
Claims8
A method of producing a surface-treated mold, comprising:
- forming an amorphous metal layer that contains at least one metal selected from the group consisting of nickel, chromium, tungsten and brass on a surface of a mold;
- and
- forming a carbon film over the amorphous metal layer while heating the amorphous metal layer at a temperature of 410° C. to 510° C.,
- wherein the mold is made of tool steel or iron.
1 more element
Dependencies are inferred from the claim text.