High-binding-force neodymium-iron-boron permanent magnet coating and preparation method

The invention relates to the technical field of permanent magnet surface coatings, in particular to a high-binding-force neodymium iron boron permanent magnet coating and a preparation method, the magnet coating and a magnet are of a staggered structure, and the preparation method comprises at least one high-temperature heat treatment procedure. High-temperature heat treatment is introduced after chamfering treatment, so that plastic deformation and sub-grain boundary defects of the base material can be repaired, and the grain boundary compactness is improved; after the material is degreased and dehydrogenated, the internal stress is reduced, the corrosion of acid to the substrate is slowed down, and the binding force in the substrate is improved; the surface roughness of the substrate can be improved, and the effect of improving the binding force of the substrate is achieved. The electroplating finished product is subjected to high-temperature heat treatment, the metal infiltration capacity can be improved,