公开(公告)号：EP1170075A4

公开(公告)日：2004-05-12

申请号：EP00981701

申请日：2000-12-13

申请人： TOYOTA CHUO KENKYUSHO KK ,  TOYOTA MOTOR CO LTD

发明人： KONDO MIKIO ,  AWANO YOJI ,  SAWAMURA MASATOSHI ,  OKAJIMA HIROSHI ,  TAKEMOTO SHIGEHIDE

IPC分类号： B22F3/02 ,  B22F1/00

CPC分类号： B22F3/02 ,  B22F2003/026 ,  B22F2003/145

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 filling the die with metallic powder and pressing the metallic powder under a pressure 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 die and the green body, significantly lower an extracting pressure despite a high-pressure forming, and provide a high-density green body due to a high-pressure forming.

摘要翻译： 本发明提供一种形成能够在高压下生产高密度压块的粉末压块的方法，同时可以减小压模从模具中排出的压力。 该方法包括将高级脂肪酸润滑剂涂布到加热模具的内表面的施加步骤，以及将金属粉末填充到模具中的压实步骤，并在施加高脂肪酸润滑剂的压力下压实金属粉末 与金属粉末化学结合并形成金属皂涂层。 由于金属皂涂层形成在模具和紧凑之间，因此模具和压块之间的摩擦力降低，并且即使压制高压也能够显着降低喷射压力。 此外，由于高压的压实，可以获得高密度的压块。