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US 7,401,640 B2Granted
Die-casting mold core
AssigneeHon Hai Precision Industry Co., Ltd.
InventorGa-Lane Chen
Life of this patent
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Abstract
An exemplary die-casting mold core includes a mold body, an intermediate layer and a diamond-like carbon film. The mold body is made of a steel alloy containing carbon, chromium, manganese, silicon, vanadium, and iron. A molar percentage of hydrogen in the diamond-like carbon film is in a range from 2% to 25%. The die-casting mold core has excellent mechanical hardness, good corrosion resistance, good wear resistance, long lifetime and ease of separation.
Claims7
A die-casting mold core, comprising:
- a mold body made of a steel alloy composed of carbon, chromium, manganese, silicon, vanadium, and iron, the mold body having a molding surface;
- an intermediate layer formed directly on the molding surface of the mold body, the intermediate layer being comprised of a material selected from a group consisting of chromium, titanium, chromium titanium, and chromium nitride;
- and
- a diamond-like carbon film formed directly on the intermediate layer, a molar percentage of hydrogen in the diamond-like carbon film being in a range from 2% to 25%.
1 more element
Dependencies are inferred from the claim text.