NdFeB magnetic materials, as the latest result of the development of rare earth permanent magnet materials, are called "Magnetic Kings" due to their excellent magnetic properties. NdFeB magnetic materials are alloys of neodymium, iron oxide, etc. Also known as magnetic steel. NdFeB has extremely high magnetic energy product and coercive force, and at the same time, the advantages of high energy density make NdFeB permanent magnetic materials widely used in modern industry and electronic technology, thus instrumentation, electroacoustic motors, magnetic separation magnetization It is possible to reduce the size, weight, and thickness of other equipment. The advantages of neodymium iron boron are high cost performance and good mechanical properties; the disadvantages are that the Curie temperature point is low, the temperature characteristics are poor, and it is easy to pulverize and corrode. It must be improved by adjusting its chemical composition and adopting surface treatment methods In order to meet the requirements of practical applications.
NdFeB permanent magnet materials are based on the intermetallic compound RE2FE14B. The main components are rare earth (Re), iron (Fe), and boron (B). In order to obtain different properties, rare earth ND can be replaced with some other rare earth metals such as dysprosium (Dy), praseodymium (Pr), iron can also be partially replaced by other metals such as cobalt (Co), aluminum (Al), and the content of boron is small, but However, it plays an important role in the formation of tetragonal crystal structure intermetallic compounds, making the compounds have high saturation magnetization, high uniaxial anisotropy and high Curie temperature.
The third generation rare earth permanent magnet NdFeB is the most powerful permanent magnet in contemporary magnets. Its main raw material is rare earth metal neodymium 29%-32.5% metallic element iron 63.95-68.65% non-metallic element boron 1.1-1.2% added in small amounts Dysprosium 0.6-1.2% niobium 0.3-0.5% aluminum 0.3-0.5% copper 0.05-0.15% and other elements
Technological process: batching → smelting ingot/slinging → powdering → molding → sintering and tempering → magnetic detection → grinding processing → pin cutting processing → electroplating → finished product. The ingredients are the basis, and sintering and tempering are the key.
NdFeB magnet blank production tools and performance testing tools: smelting furnace, stripping furnace, jaw crusher, jet mill, compression molding machine, vacuum packaging machine, isostatic pressing machine, sintering furnace, heat treatment vacuum furnace, magnetic performance test Instrument, Gauss meter.
NdFeB magnet machining tools: centerless grinding, rounding machine, double-end grinding, flat grinding, slicer, double-sided grinding, wire cutting, Tianjin high speed, West Lake bench drill, special-shaped grinding, etc.
