| 摘要 |
PURPOSE:To obtain an inexpensive magnetic anisotropy permanent magnet alloy mainly consisting of a tetragonal system crystalline phase and holding high energy product and excellent in coercive force. CONSTITUTION:This alloy is constituted of, by atom, 0.05 to 5% R1, 12.5 to 20% R, 4 to 20% B and the balance substantial Fe and in which a part of the above Fe is substituted by <=35% (excluding zero) Co; where R1 as heavy rare earths denotes one or more kinds among Dy, Tb, Gd, Ho, Er, Tm and Yb and R2 as light rare earths denotes one or more kinds of Nd and Pr or >=80% Nd+Pr and the balance one or more kinds among rare earth elements including Y other than the R1 as well as R=R1+R2. Or, if required, the above alloy may furthermore be incorporated with one or more kinds among the elements M to be added (where M denotes 3% Ti, 3.3% Zr, 3.3% Hf, 4.5% Cr, 5% Mn, 6% Ni, 7% Ta, 3.5% Ge, 1.5% Sn, 1% Sb, 5% Bi, 5.2S Mo, 9% Nb, 15% Al, 5.5% V and 5% W). |
