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Neodymium iron boron magnet
Oct 31, 2018

Neodymium iron boron magnet

The third generation rare earth permanent magnet neodymium iron boron is the most powerful permanent magnet in the present era. The BHmax value is 5-12 times of ferrite magnet, AlNiCo magnets 3-10 times; the coercivity equivalent to 5-10 times the ferrite magnet, AlNiCo magnets 5-15 times, its potential for magnetic to high and can suck up equivalent to 640 times its own weight weight.

As a result of the neodymium iron boron magnet iron as the main raw material is very cheap, neodymium rare earth reserves than SM 10-16 times more, so the price also is SmCo magnets much lower.

Mechanical properties of the neodymium iron boron magnet is better than SmCo magnet, alnico magnet, easier cutting and drilling and processing of complex shape.

The deficiency of the neodymium iron boron magnet is its poor temperature performance, high magnetic loss at high temperature, the maximum operating temperature is low. Generally about 80 degrees Celsius, after special treatment of magnets, the maximum operating temperature of up to 200 degrees celsius. Because the material contains a large number of neodymium and iron, it is easy to rust is one of its major weakness. So the neodymium iron boron magnet must be coated on the surface. Nickel (Ni), zinc (Zn), gold (Au), chromium (Cr), epoxy resin (Epoxy), etc..

Neodymium iron boron magnet is widely used in industrial aerospace, electronics, mechanical and electrical, instrumentation, medical and other fields. And the use of non technology areas are also more and more widely, such as the adsorption of magnets, toys, jewelry, etc..

Production flow:

Proportioning, smelting, ingot, powder milling, pressing, sintering and tempering, magnetic testing, milling, machining, plating

Finished product. Among the ingredients is the foundation, sintering and tempering is the key.

Neodymium iron boron magnet blank production tools and performance testing tool: a smelting furnace, swing belt furnace, jaw crusher machine and jet mill, pressing molding machine, vacuum packaging machine, static press and sintering furnace, heat treatment furnace, vacuum, magnetic can test instrument, a Gauss meter.

Neodymium iron boron magnet machine tool: centerless grinding, spheronization machine, double end grinding, flat grinding, slicing machine, double-sided grinding, cutting lines, Taizuan, abnormity mill, and so on.


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