| 摘要 |
PURPOSE:To obtain a sintered permanent magnet having superior magnetic characteristics by heat-treating an anisotropic sintered magnet alloy having a compsn. contg. Nd and other rare earth elements as principal components and further contg. iron family metals such as Fe and Co, B and a specified metal under specified conditions. CONSTITUTION:An Nd-contg. anisotropic sintered permanent magnet having a compsn. represented by a formula Rx(Fe1-yCoy)100-x-z-aBzMa (where R is Nd and other rare earth elements including Pr, Dy and Tb, M is one or more among Al, Si, Ga, Sn, Ti, V, Zr, Nb, Mo, Hf and Zn, 11.5<=x<=15, 0<=y<=0.4, 5.5<=z<=8 and 0<=a<=4) is heat-treated in a hydrogen atmosphere at 600-1,000 deg.C, further heat-treated in vacuum and rapidly cooled with blown inert gas. An anisotropic sintered permanent magnet having high residual magnetic flux density and high coercive force is obtd. |
