Manufacture of NdFeB Neodymium Iron Boron Permanent Magnets
Manufacturer of Nd-Fe-B Neodymium-Iron-Boron Permanent Magnet
Manufacture of NdFeB Magnet in China
Manufacturer of Nd-Fe-B Magnets in China
Manufacture of NDFEB Magnet in China
Manufacturer of ND-FE-B Magnets in China
Manufacture of Neodymium Iron Boron Magnet in China
Manufacturer of Neodymium-Iron-Boron Magnets in China
Manufacture of Permanent Magnet in China
Manufacturer of Permanent Magnets in China
Largest Manufacture of NdFeB Magnet in China
Largest Manufacturer of Nd-Fe-B Magnets in China
Largest Manufacture of NDFEB Magnet in China
Largest Manufacturer of ND-FE-B Magnets in China
Largest Manufacture of Neodymium Iron Boron Magnet in China
Largest Manufacturer of Neodymium-Iron-Boron Magnets in China
Largest Manufacture of Permanent Magnet in China
Largest Manufacturer of Permanent Magnets in China
Biggest Manufacture of NdFeB Magnet in China
Biggest Manufacturer of Nd-Fe-B Magnets in China
Biggest Manufacture of NDFEB Magnet in China
Biggest Manufacturer of ND-FE-B Magnets in China
Biggest Manufacture of Neodymium Iron Boron Magnet in China
Biggest Manufacturer of Neodymium-Iron-Boron Magnets in China
Biggest Manufacture of Permanent Magnet in China
Biggest Manufacturer of Permanent Magnets in China
Top Leading Manufacture of NdFeB Magnet in China
Top-Leading Manufacturer of Nd-Fe-B Magnets in China
Top Leading Manufacture of NDFEB Magnet in China
Top-Leading Manufacturer of ND-FE-B Magnets in China
Top Leading Manufacture of Neodymium Iron Boron Magnet in China
Top-Leading Manufacturer of Neodymium-Iron-Boron Magnets in China
Top Leading Manufacture of Permanent Magnet in China
Top-Leading Manufacturer of Permanent Magnets in China
Largest Importer of NdFeB Magnet in India
Largest Importers of Nd-Fe-B Magnets in India
Largest Importer of NDFEB Magnet in India
Largest Importers of ND-FE-B Magnets in India
Largest Importer of Neodymium Iron Boron Magnet in India
Largest Importers of Neodymium-Iron-Boron Magnets in India
Largest Importer of Permanent Magnet in India
Largest Importers of Permanent Magnets in India
Biggest Importer of NdFeB Magnet in India
Biggest Importers of Nd-Fe-B Magnets in India
Biggest Importer of NDFEB Magnet in India
Biggest Importers of ND-FE-B Magnets in India
Biggest Importer of Neodymium Iron Boron Magnet in India
Biggest Importers of Neodymium-Iron-Boron Magnets in India
Biggest Importer of Permanent Magnet in India
Biggest Importers of Permanent Magnets in India
Top Leading Importer of NdFeB Magnet in India
Top-Leading Importers of Nd-Fe-B Magnets in India
Top Leading Importer of NDFEB Magnet in India
Top-Leading Importers of ND-FE-B Magnets in India
Top Leading Importer of Neodymium Iron Boron Magnet in India
Top-Leading Importers of Neodymium-Iron-Boron Magnets in India
Top Leading Importer of Permanent Magnet in India
Top-Leading Importers of Permanent Magnets in India
Distributor of NdFeB Magnet in India
Distributors of Nd-Fe-B Magnets in India
Distributor of NDFEB Magnet in India
Distributors of ND-FE-B Magnets in India
Distributor of Neodymium Iron Boron Magnet in India
Distributors of Neodymium-Iron-Boron Magnets in India
Distributor of Permanent Magnet in India
Distributors of Permanent Magnets in India
Supplier of NdFeB Magnet in India
Suppliers of Nd-Fe-B Magnets in India
Supplier of NDFEB Magnet in India
Suppliers of ND-FE-B Magnets in India
Supplier of Neodymium Iron Boron Magnet in India
Suppliers of Neodymium-Iron-Boron Magnets in India
Supplier of Permanent Magnet in India
Suppliers of Permanent Magnets in India
Sintered NdFeB (neodymium iron boron) is the third-generation rare-earth permanent magnet material,
known as the “magnetic king,” and is currently the strongest permanent magnetic material in the world,
with excellent magnetic properties. It is produced by mixing neodymium, iron, boron, and other trace
elements into alloy powders, which are then ground into powder, molded under pressure, and sintered
at high temperatures. Its main component is Nd2Fe14B. Due to its outstanding magnetic properties,
sintered NdFeB is widely used in various applications requiring high-intensity magnetic fields, such as
motors and generators, magnetic levitation technology, magnetic separation equipment, nuclear magnetic
resonance imaging (MRI) in medical devices, and consumer electronics such as headphones and
hard disk drives, etc.
High magnetic performance: Sintered NdFeB magnets have extremely high magnetic energy product (BHmax),
typically ranging from 40 to 50 MGOe, with a maximum of up to 60 MGOe, which is more than ten times higher
than traditional ferrite magnets.
High coercivity: They possess high coercivity, able to resist the demagnetizing effects of strong magnetic fields.
Temperature stability: The maximum operating temperature for high-performance products can reach 200°C,
but it is generally recommended to use them in environments below 150°C to ensure magnetic stability.
Machinability: Despite being relatively hard and brittle, sintered NdFeB can be processed into various shapes
through cutting, drilling, and other machining methods to meet different application requirements.
However, sintered NdFeB is susceptible to corrosion from moisture and oxygen in the environment, so surface
coating treatment is usually required to prevent oxidation and corrosion. Common coatings include zinc plating,
nickel plating, nickel-copper-nickel plating, epoxy resin, etc.
Alloy Melting
The main raw materials of sintered NdFeB permanent magnets are rare earth, iron and ferroboron, as well as
cobalt, aluminum, copper, gallium, etc. The prepared raw materials are melted into alloy flakes under vacuum.
Hydrogen Decrepitation
Based on the hydrogen absorption and expansion principle of rare earth metals, alloy flakes are decrepitated into
millimeter grade NdFeB coarse powder, which is stored in sealed containers for anti-oxidation.
PERMANENT MAGNET has imported the continuous controlled atmosphere annealing furnace developed by Japan.
Jet Milling
Driven by high pressure gas, the NdFeB coarse powder collides with each other and decrepitates, and the particle
size of the powder was refined to micron level to obtain the NdFeB fine powder. The fine powder is also stored in
sealed containers for anti-oxidation.
Sintering&Annealing
After vacuum sintering and aging, NdFeB compacts can improve physical properties such as density, strength,
remanence and coercivity. PERMANENT MAGNET has imported several multi-chamber continuous vacuum
sintering furnaces.
Machining
The sintered NdFeB compacts shall be machined into black sheet of various specifications and models. The machining
methods mainly include: coreless grinding, double-side grinding, linear cutting, slicing, drilling, holing, tapping, etc.
After machining, the specifications include: square, disc, circular ring, tile shape, special shape, etc
Grain Boundary Diffusion
Different types and quantities of substances are directly introduced into the grain boundary region of the magnets to
react with the original grain boundary phase during sintering and subsequent aging process, so as to change the
composition and structure of the grain boundary phase, and to further improve the properties of the magnets and
reduce the addition amount of heavy rare earth in the magnets with high coercivity.
Coating
Surface Treatment is an important means to improve the surface protection capability of magnets. PERMANENT MAGNET
has several full-automatic coating production lines to realize surface passivation, zinc plating, nickel plating, copper plating,
electrophoretic epoxy, vacuum aluminum plating, zinc-aluminum spraying, etc. of magnets, meeting the requirements of
different use environments of magnets.
Inspection
PERMANENT MAGNET can carry out many testing items such as magnetic performance, service characteristics and element
analysis to provide reliable inspection guarantee and service for customers. The full-automatic inspection equipment makes
the inspection efficiency improved rapidly and the inspection data more accurate. The analysis and testing center of the company
has obtained the laboratory accreditation certificate issued by China National Accreditation Service for Conformity
Assessment (CNAS), becoming one of the few CNAS accredited laboratories in the industry
Magnetizing
Through the instantaneous pulse strong current in the coil, the coil produces an ultra-strong magnetic field,
making NdFeB products magnetized.
The magnetization direction can be divided into thickness magnetization, radial magnetization, multipole magnetization, etc.
Packing
Products are packed according to customer and company standards to suit the transportation requirements of cars, trains,
ships and airplanes, and to safely deliver to customers.
Inspection & Approval Certificates : C/W Certificate (Calibration Works Certificate) EN-10204 3.1 / DIN-50049 3.1 / ISO-10474 3.1 Mill Test Certificate,
Material Test Certificate, NACE-HIC TM-0284 / NACE-MR-0103 / NACE-MR-0175 / ISO-15166, BS EN-9001, BS EN-9100, AS-9100, AS-9100D,
IATF-16949, NADCAP Certified, CE-Marked, CE-Marking, European Pressure Equipment Directive PED-2014/68/EU, AD-2000-WO,
ASME Boiler & Pressure Vessel Code Section-II Part A Edition 2019, API-6A (American Petroleum Institute), with EN-10204 3.2 Certificate
Duly Certified & Approved by IBR (Indian Boiler Regulations), LR Class (Lloyd’s Register), GL (Germanischer Lloyd), BV (Bureau Veritas),
DNV (Det Norske Veritas), ABS Class (American Bureau of Shipping), SGS, TUV, RINA, IR Class (Indian Register of Shipping),
NORSOK Approved Standard M-630, M-650 Rev.3, DFAR/DFARS Compliant, NADCAP Certified For Ministry of Defence, DRDO,
Indian Ordnance Factory, Heavy Vehicle Factory, Bharat Electronics Limited (BEL), Hindustan Aeronautics Limited (HAL), Bharat Forge Limited,
Mishra Dhatu Nigam Limited (MIDHANI), Bharat Dynamics Limited (BDL), Indian Navy (Naval Dockyard), Mazagon Dock Shipbuilders Limited (MDL),
Bharat Heavy Electricals Limited (BHEL), National Thermal Power Corporation Limited (NTPC), Aerospace, Aviation, Electric Vehicles, Armour Vehicle,
Armor Vehicle, Automotive, Automobile, Railways, Medical Equipments, Military Missiles, Energy, Power Sector, Electronics, Power Generation
Make And Origin : India, Japan, Korea, Russia, China, Europe, Germany, Spain, Italy, France, Sweden, U.K, America, USA
Make And Origin : Indian, Japanese, Korean, Russia, Chinese, European, UK, American, U.S.A
If you have any requirement of above items, please feel free to contact us
Regards,
CONTACT PERSON :
MUKESH SHAH
Director
Mobile No. 0091 – 9820292499
Email – marketing@rolexmetals.com
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