IRON-BASED POWDERY MIXTURE FOR WARM DIE LUBRICATION MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a high density iron-based powder molded body which can obtain a molded body having high density by single press molding, and to provide a method for producing a sintered compact using the molded body.;SOLUTION: The iron-based powdery mixture comprises: iron-based powder; a lubricant for powder molding in which 10 to 75 mass% of the whole quantity is composed of the one having a melting point lower than the prescribed temperature in press molding, and the balance is composed of the one having a melting point higher than the prescribed temperature in press molding; and graphite by 0.5 mass% to the whole quantity of the iron-based powdery mixture. A heated iron-based powdery mixture is filled into a die whose surface is charge-stuck with a lubricant including a lubricant having a melting point higher than the temperature upon press molding by 0.5 to 80 mass%, and the balance lubricant having a melting point lower than the temperature in press molding, and thereafter, press molding is performed at the prescribed temperature so as to be a molded body, or further, the molded body is sintered.;COPYRIGHT: (C)2010,JPO&INPIT