PURPOSE: To easily obtain iron powder for sintering shrinkage body by forming oxide film on the surface by drying, etc., the iron having high carbon content finely pulverized under using water as medium and containing the oxygen content corresponding to carbon content in the iron.
CONSTITUTION: The granular iron made to white cast iron by flowing molten iron containing ≥2wt.% C in the water is manufactured. Successively, the above granular iron made to the white cast iron is finely pulverized under using the water as the medium and after making ≤20μm average particle size of it, it is dried to form the oxide film on the surface of the fine powdered iron. Then, the aggregation of this fine powdered body is heated to decarbonize to ≤0.4wt.% C. Successively, further, the decarbonized aggregation is ground.
TERAKAWA TOSHIRO
BABA HIDEAKI
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