Production process of neodymium-iron-boron magnetic ring

The invention relates to the technical field of magnetic ring production, in particular to a production process of a neodymium iron boron magnetic ring. The neodymium iron boron magnetic ring is prepared from the following raw materials in percentage by mass: 1.6 to 3.8 percent of B, 1.2 to 3.3 percent of Nb, 23 to 28 percent of PrNd, 0.8 to 2.5 percent of Ga, 0.15 to 3.0 percent of Al and the balance of Fe, the functional protective agent disclosed by the invention is composed of the nano aluminum oxide microspheres and the nano titanium dioxide, so that the wear resistance of the functional protective agent is greatly improved; 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate is also grafted on the surface of the pretreated inorganic base material, so that the oxidation resistance of the pretreated inorganic base material is effectively enhanced, and the pretreated inorganic base material and tetra [beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester are mutually cooperat