| 简介 |
PROBLEM TO BE SOLVED : To provide a method for manufacturing an R-T-B-based sintered magnet which is arranged to prevent the slip of a compact after covering the surface of a compact with an oil solution, which would lead to the collision of the compact with another compact thereby chipping the compact, and arranged to eliminate the need for a long time for removal of the oil solution at the time of sintering.SOLUTION : A method for manufacturing an R-T-B-based sintered magnet comprises : a compacting step for compacting alloy powder for the R-T-B-based sintered magnet (where R represents at least one of rare earth elements (including yttrium (Y)), which certainly includes neodymium (Nd), T represents iron (Fe) or a combination of iron and cobalt (Co), and B represents boron) thereby preparing a compact, provided that in the alloy powder for the R-T-B-based sintered magnet, the oxygen content is 4000 mass ppm or less; a spray step for spraying an oil solution on the entire surface of the compact under a pressure of 0.2-0.4 MPa with a spray amount of 1-2 L/hr for a spray time of 3-6 seconds; and a sintering step for sintering the compact after the spray step. |
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