机译:Design of Punch Shape for Crack-Free Radially Oriented Nd#x2013;Fe#x2013;B Ring Magnet Prepared by Backward Extrusion Method
CISRI and NIMTE Joint Innovation Center on Rare Earth Permanent Magnets, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences;
Backward extrusion (BE); crack; Nd–Fe–B; ring magnet (RM); Surface cracks; Surface morphology; Surface treatment; Shape; Magnetomechanical effects; Friction; Magnetometers;