| 摘要 |
PURPOSE:To improve oxidation-resistant properties and the moldability by a method wherein low melting point metal is mixed with magnetic alloy powder in a specific volume ratio and dispersed uniformly on the surfaces of the powder particles. CONSTITUTION:Low melting point metal is mixed with magnetic alloy whose composition is expressed by RxFe1-x-y-zByXz (wherein R denotes one or two or more among rare-earth elements, X denotes one or two or more among Co, Ni, Mn, Cr, Mo, Nb, V, Cu, Ti, Zn, Pb, Sn, C, P, Si, Al, Ca and N, 8<=x<=20, 2<=y<=15 and 0<=z<=8). The volume ratio of the low melting point metal to the mixture is not higher than 10%. The low melting point metal is mixed in the melted state at a temperature not higher than 800 deg.C and dispersed uniformly so as to cover the surfaces of the powder particles of the magnetic alloy. With this constitution, oxidation-resistant properties and the moldability for powder compression molding and hot press can be improved. |
