Abstract: Provided are a method for producing a fuel cell separator, and a separator material that can prevent carbon in a carbon layer formed on the surface of a metal substrate from being detached during press forming, and thus can suppress failures in the press forming. The method is a method for producing a fuel cell separator having formed thereon gas flow channels through which fuel gas or oxidant gas to be supplied to a fuel cell stack flows, the method including preparing a plate-shaped separator material including a titanium substrate, a carbon layer covering the titanium substrate, and a resin layer covering the carbon layer; press-forming the prepared separator material into the shape of the separator such that the separator has the gas flow channels formed thereon; and removing the resin layer from the press-formed separator.

Abstract: In molding a compact having portions of an equal thickness on opposite sides of a through-hole, an advancing speed of a holder holding a powder material is adjusted before the holder is advanced and retracted over a die cavity of a die. Specifically, a first preparation of determining in advance a relation between the advancing speed of the holder and a packing density of the powder material packed in the die cavity at each of the portions to be of an equal thickness of the compact on opposite sides of the through-hole is made; and, based on the relation determined in the first preparation, the advancing speed of the holder is adjusted to a speed at which the packing density becomes uniform. Thus, the packing density of the powder material packed in the die cavity can be uniformized, so that the dimensional accuracy of the molded compact can be improved.

Abstract: Provided are a method for producing a fuel cell separator, and a separator material that can prevent carbon in a carbon layer formed on the surface of a metal substrate from being detached during press forming, and thus can suppress failures in the press forming. The method is a method for producing a fuel cell separator having formed thereon gas flow channels through which fuel gas or oxidant gas to be supplied to a fuel cell stack flows, the method including preparing a plate-shaped separator material including a titanium substrate, a carbon layer covering the titanium substrate, and a resin layer covering the carbon layer; press-forming the prepared separator material into the shape of the separator such that the separator has the gas flow channels formed thereon; and removing the resin layer from the press-formed separator.

Abstract: In molding a compact having portions of an equal thickness on opposite sides of a through-hole, an advancing speed of a holder holding a powder material is adjusted before the holder is advanced and retracted over a die cavity of a die. Specifically, a first preparation of determining in advance a relation between the advancing speed of the holder and a packing density of the powder material packed in the die cavity at each of the portions to be of an equal thickness of the compact on opposite sides of the through-hole is made; and, based on the relation determined in the first preparation, the advancing speed of the holder is adjusted to a speed at which the packing density becomes uniform. Thus, the packing density of the powder material packed in the die cavity can be uniformized, so that the dimensional accuracy of the molded compact can be improved.