The process technology of ndfeb magnetic material

neodymium iron boron magnetic materials, an alloy of iron oxide, etc. Also called magnetic steel. Ndfeb material contains a lot of neodymium and iron, the characteristics of hard and brittle, easy to be oxidation corrosion. Ndfeb has a very high magnetic energy product and coercive force, as well as the advantages of high energy density of ndfeb permanent magnet material in modern industry and ndfeb gain the wide application of electronic technology, so that the instrument, acoustic electric iron cobalt machine, the magnetization of the magnetic separation equipment miniaturization, lightweight, thin become possible. The advantage of ndfeb is cost-effective, good mechanical properties; Shortage of plastic magnetic Curie temperature in low point, temperature characteristic is poor, and is easy to be pulverization corrosion, must through the adjust its chemical composition (such as adding cobalt high Curie temperature of the element) and surface treatment methods (surface chemical passivation is currently one of the very good solution) to improve, to meet the requirements of practical application.

Ndfeb alloy (i.e., Nd - Fe - B series permanent magnet). Japan and the United States in 1983 also found that the ndfeb alloy, known as the third generation of permanent magnetic material, when a Nd and Fe atoms are replaced by different RE and other metal atoms can be developed into a variety of different components, the performance of different Nd - Fe - B is a permanent magnet. Its preparation methods mainly include sintering process, restore fast diffusion method, melt quenching method, bonding method, such as casting process, the sintering process and bonding method is the most widely used in the production.