| 摘要 |
PURPOSE:To impart magnetic anisotropy to the alloy for the magnet by loading an alloy which mainly consists of a rare-earth element R, a transition metal element M and a IIIb element X as raw material basic constituents into a capsule. CONSTITUTION:An alloy mainly consists of R.M. and X as raw material basic constituents is fused and casted, the casted alloy is loaded into a capsule, the capsule is subjected to hot machining at a temperature exceeding 500 deg.C and a machining rate with a distortion rate of 10<-2>-10<2>/sec. the casted alloy is subjected to heat treatment at 250-1100 deg.C, and then it is cut and is abraded. The R of the material is at least one type of rare-earth element which is selected from Pr, Nd, Dy, Ce, La, Y, and Tb, M is at least one type of transition metal element which is selected from Fe, Co, Cu, Ag, Au, Ni, and Zr, and X is at least one type of IIIb element which is selected from B, Ga, and Al. The raw material basic constituent is 12-25% for R, 65-85% for M, and 3-10% for X in atom percentage. When performing hot machining, at least one type which is selected from boron nitride BN, a glass lubrication agent, alumina, silica, molybdenum dioxide, graphite, and carbon is applied onto the capsule surface. Heat treatment is performed at 700-1100 deg.C for 0.5-24 hours, cooling is made, and then heat treatment is performed at 250-700 deg.C for 0.5-12 hours. |
