Permanent magnets


Material or product

Type of equipment

Processing technology

Production of industrial permanent magnets is a very complex and advanced technology. Research and Production Company "ERGA" has in-plant unique line for series production of sintered and resin-bonded magnets with capacity up to 200 kg per shift. The full cycle of magnet manufacture from powder production to testing on in-plant stand by highly qualified experienced specialists guarantees high quality and compliance with strict standards. You can buy permanent magnets directly from the manufacturer by contacting us in any convenient way. NdFeB neodymium magnets, samarium magnets of standard grades are always available at our stock.

At the first stage of the permanent magnet production, the raw materials are sorted and delivered to the melting shop. Iron, neodymium, ferroboron (or samarium, cobalt) and other necessary components are fed into the melting furnace and melted in argon. The furnace gradually heats up to1500 ° C, the temperature at which the raw materials melt.

In 40 minutes the alloy will be almost ready; it only needs to be cooled. Ingot of material is removed from the mold, powder is subsequently obtained from ingots to manufacture permanent magnets. The alloy must be crushed to from powder ranging about 5 microns. To obtain the powder of the desired fraction, the ingots are treated in three types of mills: coarse, medium grinding and pulverizing. Every machine grinds up to 200 kg of metal per work shift.
The finished powder consists of micromagnets ranging no more than 5 microns. Under the press, the mass gets the desired shape, and its constituent particles - orientation in the magnetic field. The powder is compacted in magnetic field. The result is a magnet press blank.
The blank is immediately placed in a vacuum bag: the alloy powder is oxidized in open air, which means that its magnetic properties change. In addition, powders can ignite at any moment. The blank will remain in the protective film until the moment of sintering. The temperature inside the oven reaches 1200 °C. The magnets are sintered and heat-treated for up to 3-4 days. During this time, the micromagnets in the alloy will be compacted and get monolithic shape. Only now the bars are ready to turn into permanent magnets.

See also

Resoline complete process solutions