| 摘要 |
PROBLEM TO BE SOLVED: To improve thermostability and corrosion resistance by containing a rare earth element in specific weight, specifying the Na weight of at least the rare earth element and comprising at least one of B, Co, Fe, C, oxygen and Cu, Ga and Ag in specific weight. SOLUTION: A 27-35wt.% rare earth element is contained. At least 50wt.% Nd of total rare earth element contents, 0.8-1.3wt.% B, Co of wt.% up to 30wt.%, 45-75wt.% Fe, 0.03-0.3wt.% C and 0.2-0.8wt.% oxygen are comprised. A permanent magnet alloy containing either one of Cu, Ga and Ag of wt.% up to 1wt.% is obtained. The alloy contains at least one transition element of up to 5wt.% selected from a group consisting of Al, Si, Sn, Zn, Nb, Mo, V, W, Cr, Zr, Hf, Ti and Mg. |
