| 摘要 |
PURPOSE:To provide a lubrication coating film for plastic working, capable of improving the working environment and prolonging the life of mold at a low cost, by including a solid lubricant in a phosphate coating or metallic soap coating formed on the object to be worked. CONSTITUTION:The objective lubrication coating film is produced by including a solid lubricant (e.g. MoS2, graphite, ash, fluororesin, calcium stearate, etc.) in a phosphate coating, metallic soap coating or alkali metal stearate coating formed on an object to be worked e.g. by cold forging, press working, etc. EFFECT:The lubrication coating film can be easily removed after the plastic working by using a solvent of the stearic acid salt used as the lubrication coating film. |
