摘要:
A surface treatment method includes covering a surface of a casting mold with a carbon film containing at least one type of nanocarbon selected from the group of carbon nanocoils, carbon nanotubes and carbon nanofilaments, and further applying fullerenes to that surface. With this surface treatment method being performed on a surface (a cavity surface, etc. of a casting mold) making contact with a molten casting material such as aluminum, etc., sticking of the molten casting material to the mold is inhibited, release resistance of the product is reduced, and release effectiveness is improved. The release effectiveness lasts longer than in the case of a conventional carbon film.
摘要:
Disclosed is a method for rust-proofing a mold, which is capable of reducing the time and the cost required for rust-proofing the mold. A step (S1) for rust-proofing a mold (1) includes an iron hydroxide-forming step (S11) for forming iron hydroxide on a predetermined part of the surface of the mold (1), and a surface-treating step (S12) for forming a film covering the molding surface of the mold (1), and for changing the iron hydroxide formed on the mold (1) into black rust, by heating the mold (1), under an oxygen-deficiency atmosphere, on which the iron hydroxide is formed in the iron hydroxide-forming step (S11).