Performance guarantee magnet control from raw material production process

1, according to the business of manufacturing high-end or mid-range or low-grade sintered NdFeB requirements, in accordance with national standards for raw ingredients to buy raw materials. 2, advanced production technology directly determines the performance quality of the magnet. The most advanced technology is scale ingot (SC) technology, hydrogen broken (HD) technology and jet mill (JM) technology. Small capacity vacuum induction melting furnace (10kg, 25kg, 50kg) has been a large capacity (100kg, 200kg, 600kg, 800kg) vacuum induction furnace replaced. SC (Strip Casting) quick-setting slab technology has gradually replaced the large slabs (thickness 20-40mm cooling direction than ingot), hydrogen broken (HD) technology and jet mill (JM) to replace the jaw crusher, disk mill, ball mill (wet milling) to ensure the uniformity of the powder, and is conducive to liquid-phase sintering and grain refinement. 3, the magnetic field orientation, our country is the only country two-step pressing of perpendicular alignment with a small pressure molding, and finally the use of quasi-isostatic pressing, which is one of the sintered NdFeB industry's most important features . 4, and monitor the quality of the production process is very important, we can control by SC thickness measurement and JM powder particle size distribution testing methods. Quality products are dependent on control of the production process, but customers will be very confused, how to judge the performance of the product I buy it? China Institute of Metrology has developed a variety of types of permanent magnetic materials technology magnetic parameters measuring instruments. Pulsed magnetic field magnetometer (PFM) is a testing ultra-high coercivity permanent magnet test equipment, mainly in order to adapt to the field of electric vehicles and large-scale permanent magnet motor needs high coercivity neodymium cylinder magnets. Customers can magnet parameters Br (remanence), Hcb (coercivity), Hcj (intrinsic coercivity), (BH) max (maximum energy product) Selected NdFeB grades they need, while four That argument is to determine the product is not manufactured according to customer requirements of the standard.