| 摘要 |
PURPOSE:To produce magnetic alloy powder having excellent resistance to oxidation, wear and corrosion at a low cost by subjecting a molten metal made of a specific compsn. formed by adding a nitride forming element such as Ti to an iron-based magnetic material contg. C and Cr to atomizing with gaseous N2. CONSTITUTION:The molten metal is obtd. by adding >=1 kinds among 0.5-15.0wt% Ti, 0.5-15.0% Zr, 0.5-15.0% Hf, 0.5-10.0% Nb, 0.5-15.0% V, 0.5-15.0% Ta, and 0.5-15.0% Al as the nitride forming elements to the iron- based magnetic material contg. over 0.18 and <=1.0% C, and 12.5-20.0% Cr and melting the mixture. After the molten metal is kept at a prescribed temp., the molten metal is subjected to atomizing by the prescribed gaseous N2 pressure. The above-mentioned material is thereby pulverized and the nitride film of the nitride forming elements is formed on the surface of the powder particles, by which the magnetic alloy powder is obtd. The powder is subjected to a nitriding treatment at need to increase the thickness of the nitride film or the hardness thereof is adjustable by subjecting the powder to a heat treatment at about 900-1,000 deg.C.
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