A METHOD FOR IMPROVING PERFORMANCE OF SINTERED NDFEB MAGNET AND A SPECIAL DEVICE THEREOF

摘要

There is provided a method of preparing a sintered NdFeB magnet comprising the steps of:a) pressing magnetic powders into a green compacts under a magnetic field and then demagnetization;b) isostatic pressing the green compact;c) fixing the green compact on the special device as defined in claim 8, and then machining the green compact into a finished shape and corresponding size on one or two surfaces among an orientation surface, non-orientation surface and pressing surface;d) sintering and annealing the machined green compact; ande) machining the obtained blank into a finished product.;Further, a corresponding special device is disclosed.