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How Are Neodymium Magnets Made 
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How Are Neodymium Magnets Made 

Author: Site Editor     Publish Time: 2023-05-09      Origin: Site

Neodymium iron boron magnets are a complex process that includes some very high-tech metallurgical methods, including powder metallurgy and advanced process metallurgy.


The manufacturing of neodymium magnets (also known as NdFeB) must follow dozens of process steps very precisely, which is the chemical symbol of neodymium, iron and boron.

Here we provide a detailed description of the various processes involved in the production of neodymium iron boron (NdFeB) magnets.

1. Raw material preparation:

The raw materials used in the production of NdFeB magnets - neodymium, iron, and boron - are sourced and processed into a suitable form for use in the production process. Other elements, such as dysprosium, praseodymium, and terbium, may also be added to enhance the magnetic properties of the final product.

2. Powder mixing:

The raw materials are blended together in a specific ratio to form a homogenous powder mixture. The mixture is often milled or ground to ensure that the powder particles are of a consistent size and that the blend is uniform.

3. Pressing:

The powder mixture is then compacted under high pressure to form a "green" magnet. The pressure and temperature used in this step are carefully controlled to create a magnet of the desired density and strength.

4. Sintering:

The green magnet is heated in a furnace to a high temperature, typically around 1000-1200°C, to fuse the powder particles together and form a solid magnet. Sintering is a critical step in the production process, as it determines the final magnetic properties of the magnet.

5. Machining:

The sintered magnet is often machined to its final shape and size using cutting tools such as diamond blades or grinding wheels. This step ensures that the magnet meets the required dimensions and tolerances.

6. Surface treatment:

NdFeB magnets are prone to corrosion due to their high iron content, so they are often coated with a protective layer, such as nickel or epoxy, to prevent oxidation and degradation.

7. Magnetization:

The final step in the production process is magnetization, where the magnet is exposed to a strong magnetic field to align its magnetic domains and give it a specific magnetic polarity and strength.

Overall, the production process of NdFeB magnets is complex and requires precise control of many variables to achieve the desired magnetic properties.

You are welcome to visit Ningbo Bestway Magnet Co.,Ltd. for neodymium iron boron production.

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