HSMAG Permanentmagnet has developed a unique hot extrusion process to produce radially oriented anisotropic Nd-Fe-B ring magnets.
Unlike sintering, this process does not rely on a magnetic field for radial orientation.
Our process starts with raw material powders manufactured by rapid quenching of the prescribed alloys into nanocrystalline flakes.
These flakes are hot pressed to the theoretical density and then hot extruded to ring-shaped magnets.
During this advanced hot extrusion process, randomly oriented crystal grains go through preferential grain growth and rotation.
This results in the full-density, nanocrystalline structure with the highest level of radial orientation.
Although the basic magnetic properties (Br, Hc, and (BH)max) are similar to sintered Nd-Fe-B, our unique process gives rise to several remarkable features listed below.
