Stainless Steel Magnetic development history!
With the development of society, the application of magnets has become more and more extensive. From high-tech products to the simplest packaging magnets, NdFeB magnets and ferrite magnets are the most widely used.
From the perspective of the development history of permanent magnet materials. Carbon steel used at the end of the 19th century had a magnetic energy product (BH) max of less than 1MGOe (megagauge). (a physical quantity that measures the density of magnetic energy stored in a permanent magnet). At present, the Nd-Fe-B permanent magnet materials are produced in foreign batches. The magnetic energy product has reached more than 50MGOe. Over the past century, the remanence Br of the material has increased very little. The increase in energy product is attributed to the increase in coercivity Hc. The improvement of coercivity is mainly due to the understanding of its essence. This also includes the discovery of compounds with high magnetocrystalline anisotropy. And advances in preparation technology.
In recent years, NdFeB magnets are a sunrise industry that is energy-saving and environmentally friendly. It has worked extensively in the fields of information technology, automotive, nuclear magnetic resonance, wind power, and electric motors. The compound growth rate is expected to be around 20% in the next 3-5 years. Because China has obvious resource, cost, and market advantages. Therefore, the world NdFeB industry is shifting to China. In 2005, China’s NdFeB output accounted for more than 70% of the global output.
NdFeB magnets have sintered NdFeB and bonded NdFeB magnets.
