| 摘要 |
PURPOSE:To obtain easily low carbon and low oxygen alloy steel powder by decarburizing steel powder contg. an easily oxidizable element obtd. by an oil atomizing method in an atmosphere contg. H2 and H2O, and reducing the powder in a nonoxidizing atmosphere contg. H2. CONSTITUTION:Molten steel contg. one or more kinds of easily oxidizable elements selected among Cr, Mn, V, Nb and Si is atomized with a nonoxidizing liq. as an atomizing medium. The resulting steel powder having <=0.2wt% O2 content and >=0.1wt% C content is decarburized in an atmosphere contg. H2O and H2, and it is reduced at 850-1,200 deg.C in a nonoxidizing atmosphere having <=-20 deg.C dew point.
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