Method of manufacturing iron member
An iron member having a coating film on at least part of its surface is manufactured by a step of projecting zinc particles to the surface of a base material made of an iron material to form a base film, and a step of forming a coating film of resin coating material on at least a part of the base film.
1. A method of manufacturing an iron member having a coating film on at least part of its surface, comprising:
a step of projecting zinc particles to the surface of a base material made of an iron material to form a base film by a shot blasting apparatus, the zinc particles having an average particle diameter of 0.5 to 2.0 mm; and
a step of forming a coating film of resin coating material on at least a part of the base film.
2. The method according to claim 1 , wherein the zinc particles are projected at a speed of 40 to 75 meters per second and a projection angle of 45 to 135 degrees.
3. The method according to claim 1 , wherein the step of forming the coating film is performed by powder coating.
4. The method according to claim 1 , wherein the base film has a thickness of 0.3 to 3 μm, and the coating film has a thickness of 15 to 80 μm, respectively.
5. The method according to claim 1 , further comprising:
a step of forming a film of trivalent chromate, performed after the step of projecting the zinc particles when forming the base film, and before the process step of forming the coating film.
6. The method according to claim 1 , wherein the manufactured iron member is a constituent member of a disc brake device.