| abstract |
PROBLEM TO BE SOLVED: To provide an inexpensive surface treatment method for plastic working of a metal material in consideration of global environmental protection, having high lubricity comparable to a conventional chemical conversion-soap treatment film. Providing a method that can provide a coating. SOLUTION: Powder particles of the following (1), (2) or (3) are adhered to the surface of a metal material, and the surface of the metal material has an adhesion amount of 0.02 to 50 g / m 2 comprising a carrier component and a sliding component. Surface treatment method for plastic working of metal material characterized by forming a composite film: (1) powder particles of inorganic compound powder, powder particles selected from soap, molybdenum disulfide, polytetrafluoroethylene, wax and resin, ( 2) powder particles obtained by coating the surface of a metal soap of a polyvalent metal with an inorganic polyvalent metal compound as a core, or (3) powder particles of (2), soap, wax and resin At least one powder particle. |