METHOD OF FORMING A POWDER COMPACT

摘要

A method of forming a powder green body, capable of providing a high-density green body under a high pressure and reducing a pressure for extraction from a die, the method comprising a coating step for coating the inner surface of a heated die with a higher fatty acid lubricant, and a pressing step for filli ng the die with metallic powder and pressing the metallic powder under a pressu re produced when the higher fatty acid lubricant chemically combines with the metallic powder to form a metallic soap film. A metallic soap film formed between the die and the green body can reduce a friction force between the d ie and the green body, significantly lower an extracting pressure despite a hig h- pressure forming, and provide a high-density green body due to a high-pressu re forming.