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What is NdFeB Magnet
Apr 12, 2018

What is NdFeB Magnet?



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ND-FE-B, a simple magnet, unlike the magnets we normally see, it is known as the Magnetic King for its excellent magnetic properties. Neodymium-iron-boron contains a large number of rare earth elements neodymium, as well as iron and boron, its characteristics are hard and brittle. As the surface is easily oxidized, ND-FE-B must be treated with the surface coating. Surface chemical passivation is one of the best solutions. As a kind of rare earth permanent magnet material, ND-FE-B has very high magnetic energy product and coercive force, at the same time, the advantages of high energy density make ND-FE-B permanent magnetic materials in modern industry and electronic technology has been widely used, so that instrumentation, electro-acoustic motor, magnetic magnetization and other equipment, such as miniaturization, lightweight, thin form of the possibility. ND-FE-B has the advantage of high cost-performance, good mechanical properties, low temperature, poor temperature, and easy to powder corrosion, it is necessary to adjust its chemical composition and adopt surface treatment method to improve it, in order to achieve the actual application requirements. NdFeB magnetic materials, as the latest development of rare earth permanent magnets, are known as "magnetic Kings" due to their excellent magnetic properties. ND-FE-B magnetic material is the alloy of praseodymium nd metal, boron iron, etc. Also known as magnetic steel.


The classified of the ND-FE-B
NdFeB is divided into sintered nd-FE-B and bonded nd-FE-B , bonded nd-FE-B in all directions are magnetic, corrosion-resistant, and sintered nd-FE-B Because of easy corrosion, surface coating, generally have galvanized, nickel, environmental zinc, environmental protection nickel, nickel, copper and nickel, environmental protection nickel, copper and nickel. The sintered nd-FE-B is generally divided into axial magnetic and radial magnetizing, depending on the required working face.



Surface plating of the NdFeB Magnet
With Sintered neodymium-iron-boron in Japan, Germany, the European Union and so on in the patent technology thawing, our country each big sintering factory's coordinated effort, the sintered Neodymium Iron Boron product grade greatly enhances. As a High-tech application field of its comprehensive performance of the continuous improvement of its sintered nd-FE-B surface treatment requirements are greatly improved, The traditional processing method can not meet the demand of the progress of industrial chain. UESTC, Da Chuan, Jiaotong University, Rui Shi, and other scientific research institutions, from the micro-molecular structure, in essence, improve the principle of surface treatment and industrial application process development, after 4 years of efforts and achieved key technology of Neodymium Iron Boron neodymium Iron Boron breakthrough. Nano (3010) Chelating film without coating process, the technology is the original technology, the nano-membrane layer contains active groups with strong resistance to moisture, oxygen, chlorine ions (CL), carbon dioxide (CO2) and so on. Corrosion resistance and the bonding ability of the organic resin greatly improved. Its excellent surface physical and chemical properties will have a significant impact on the application field. December 2013, the processing technology by the Sichuan, the Chinese Academy of Sciences system testing. Its corrosion resistance is met in the ocean climatic conditions for 20-30 years, can be widely used in marine wind power generation. Surface bonding force of more than 20MPA, can be widely used in permanent magnet high-speed motor, special motors, electric vehicle motors, UHV, High-voltage DC power supply system, fast charging systems, aerospace and military industries and other fields.


The Proces flow:
Process: Ingredients → smelting ingots/sling → flour → pressure → sintering temper → magnetic detection → demagnetization curve demagnetization curve (2) grinding processing → pin-cut processing → electroplating → finished product. The ingredients are the basis, sintering tempering is the key. NdFeB Magnet Blanks Production tools and performance testing tool: Smelting furnace, swing furnace, jaw breaking machine, air mill, pressing molding machine, vacuum packaging machine, isostatic Press, sintering furnace, heat treatment vacuum furnace, magnetic performance tester, Gauss meter. NdFeB Magnet Machine processing tools: centerless Grinding, rounding machine, double end grinding, flat grinding, slicing machine, double-sided grinding, wire cutting, bench drill, abnormity grinding and so on.


Application of the NdFeB Magnet
sintered nd-FE-B Permanent Magnetic materials 3010-section SEM 3010-section sem has excellent magnetic properties, widely used in electronics, electrical machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields, more common permanent magnet motors, speakers, magnetic separator, computer disk drives, Magnetic resonance imaging equipment, such as instrumentation. Nano (Royce3010) chelate film without coating can be used for 20-30 years in marine climatic conditions, and can be widely applied to marine wind power generation. Surface bonding force of more than 20MPA, can be widely used in permanent magnet high-speed motor, special motors, electric vehicle motors, UHV, High-voltage DC power supply system, fast charging systems , aerospace, military and other fields.