| 简介 |
PROBLEM TO BE SOLVED : To provide an anisotropic iron-base alloy magnet manufactured by using a liquisol quenching method. SOLUTION : A rapidly solidified alloy is prepared by rapidly cooling and solidifying a molten alloy having a compositional formula which is represented by (Fe1-mTm)100-x-y-zQxRyMz (wherein, T is either or both of Co and Ni; Q is either or both of B and C; R is one or more kinds among rare-earth metal elements; and M is at least either of Nb and Mo) and in which composition ratios (x), (y), (z) and (m) satisfy 2<=x<=28 (atomic %), 8<=y<=30 (atomic %), 0.1<=z<1.0 (atomic %) and 0<=m<=0.5, respectively. Subsequently, the rapidly solidified alloy is pulverized and passed through a sintering stage to manufacture the rare-earth permanent magnet. Cooling rate is controlled to 102 to 104 K/s in the rapid solidification stage to uniformly refine the alloy structure and uniformly disperse the additive elements M. |
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