| 摘要 |
PROBLEM TO BE SOLVED: To draw out a compact having high density under lower pressure by improving the wear resistance of a powder compacting die and reducing the friction of the surface of the die and to efficiently compact a high density sintered product. SOLUTION: In the powder compacting die in which the die having inner holes for forming the outside shape of the compact and consisting of a hard material is inserted into the inner holes of a die holder, the inner holes of the die have the taper of 1/5,000 to 1/1,000 expanding toward the compact drawing side, a single coating layer or a plurality of coating layers of at least one or more kinds selected from TiC, TiN, Al2O3, TiCN, HfN, CrN, W2C and DLC are formed on the surface of the die, and the material of the die holder is composed of ordinarily used steel whose tempering temperature is higher than the coating treating temperature.
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