| abstract |
An object of the present invention is to provide a method for producing a metal material for plastic working having good lubrication performance during plastic working. At least one inorganic compound selected from the group consisting of phosphates, sulfates, borates, silicates, molybdates and tungstates, and a metal soap are provided on the surface of a metal material for plastic working. Wax, polytetrafluoroethylene, contact with an aqueous treatment liquid containing at least one lubricant selected from the group consisting of molybdenum disulfide and graphite as a main component, followed by drying, the above-mentioned inorganic compound on the interface side with the metal A base layer having a thickness of 0.1 to 15 [mu] m and containing, as a main component, a lubricant layer having a thickness of 0.1 to 10 [mu] m containing the above-mentioned lubricant as a main component, and a lubricant layer / base layer This is a method for producing a metal material for plastic working in which a graded two-layer lubricating film having a layer thickness ratio of 0.2 to 3 is formed, and then heat-treated to improve lubricity. |