Sintered neodymium iron boron magnets are produced through powder metallurgy technology, with approximately 16 main production steps. Among them, raw material preparation (type of magnetic powder, raw material cost), sintering process, surface treatment, annealing, and post-treatment all significantly affect the performance of the magnets. These main links are also the main direction for the rapid progress of China's neodymium iron boron permanent magnet industry.

Firstly, in terms of magnetic powder preparation and raw material ratio, China has successively broken through processes such as hydrogen explosion powder production and dual alloy ratio, solving the internal generation of alpha in the melting of neodymium iron boron ingots caused by the decrease in rare earth element ratio during the traditional neodymium iron boron firing process- Fe precipitation leads to a decrease in the content of Nd2Fe14B, which affects subsequent powder making, sintering, and post-treatment, thereby leading to a decrease in intrinsic coercivity. Adopting a dual alloy process, using a main alloy with a composition close to Nd2Fe14B and a neodymium rich alloy auxiliary alloy, and eliminating alpha after annealing processing- The influence of Fe phase. By using raw material ratios and back-end processing techniques, the proportion of rare earth elements in magnets can be reduced, achieving the effect of simultaneously reducing production costs and improving magnet performance.