Shanghai King-Nd Magnet Co., Ltd.
NdFeB Magnet Manufacturer Since 2008
NdFeB Magnet Manufacturer Since 2008
Strict 10-step standardized production process to guarantee stable magnet performance
We implement full-process quality control from raw material batching to finished magnet packaging, providing high-performance customized NdFeB magnets for global industrial customers.
Select high-purity raw materials including pure iron, praseodymium neodymium metal and ferroboron. Strictly proportion raw materials according to target magnet grades to ensure consistent magnetic properties of finished products.
Raw materials are melted in a vacuum melting furnace in an oxygen-free environment. The molten alloy is rapidly cooled to form thin alloy strips, obtaining uniform crystal microstructure and reducing internal defects.
Alloy strips absorb hydrogen and crack automatically. This pre-crushing process greatly improves grinding efficiency, forming loose alloy particles ready for jet milling.
Alloy particles are ground into ultra-fine magnetic powder under nitrogen protection. We precisely control powder particle size distribution to achieve high remanence and high coercivity magnets.
Magnetic powder is oriented under a strong external magnetic field, then compressed into green compact blanks. Orientation technology determines the maximum magnetic energy product of final magnets.
Green blanks are sintered in a high-temperature vacuum furnace, followed by two-stage aging treatment. Sintering optimizes density and crystal structure to realize target magnetic performance.
A professional BH tester measures remanence, coercivity, maximum energy product and temperature resistance. Nonconforming blanks are rejected before machining to reduce production waste.
Sintered magnet blanks are processed via multi-wire cutting, surface grinding and shaping. We support complex custom dimensions and tight tolerance requirements for various industry applications.
Multiple corrosion-resistant coating options are available: Nickel, Zinc, Ni-Cu-Ni, Epoxy coating. Surface treatment effectively prevents neodymium magnet oxidation and extends service life in harsh environments.
Finished magnets are magnetized according to customer pole orientation requirements. After final appearance inspection, magnets are packed in magnetically shielded packaging for safe global transportation.
We provide free magnet samples, technical parameter support and customized magnet solution design.