5 processes to produce NdFeB magnets

NdFeB magnets are composed of neodymium, iron, boron and a few transition metals. We are producing Neodymium (NdFeB) magnet in 5 processes:

1. Elements put into furnace to create the alloy. The Neodymium, Iron and Boron are measured out and put in a vacuum induction furnace to form an alloy. Other elements are also added, as required for specific grades e.g. Cobalt, Copper, Gadolinium and Dysprosium.

2. The alloy is then broken down into a very fine powder.

3. The powder is then pressed in the presence of an applied magnetic field (anisotropic magnets).

4. Before the pressed NdFeB magnet is released it is given a demagnetising pulse to leave it unmagnetised. The compacted magnet is termed a 'green' magnet .The "Green" magnet is sintered to give the final magnetic properties and shrinks during the process.

5. The magnet is machined to final dimensions, plated, magnetised to saturation, inspected, and then packed to ship out.

Neodymium permanent magnets are extremely strong, they are applied widely in motors, separators, microphone assemblies, etc.