How Is Permanent Magnet Made? The Manufacturing Process Is Complex

As we all know, magnets come in various shapes, such as square, round, bar, ring, and tile shapes. Among them, circular magnets are more common. But how is permanent magnet created? How are strong magnets produced? Is the manufacturing process simple? Below we analyze and answer these questions for you!

What is a permanent magnet? 

As the name suggests, it is an object that can maintain its magnetism for a long time without an external magnetic field. Depending on the material, it can generally maintain its magnetism for many years. Permanent magnet for sale can be made of materials with ferromagnetism, such as iron, nickel, and so on.

Its atomic structure is special, and the atoms themselves have a magnetic moment. Generally, the molecules of these minerals are disordered, the magnetic regions affect each other and the magnetism is not apparent. However, under external force such as magnetic field guidance, the direction of molecular arrangement tends to be consistent, and the magnetism is apparent, which is commonly known as a magnet. Iron, cobalt, and nickel are the most commonly used magnetic materials. Permanent magnets are divided into magnet permanent and soft iron. Permanent magnets have a fixed direction of spin and electron angular momentum of magnetic materials under strong magnetism. Soft iron loses magnetism slowly without current. 

A magnet is just a generic name for something with magnetism; the actual composition does not necessarily contain iron. Iron, which is a common magnetic element in pure metal state, does not have permanent magnetism itself. It only produces magnetism when it is near a permanent magnet. In general, permanent magnets contain impurity elements (such as carbon) to stabilize their magnetism. However, this will reduce the electrons' freedom and make it difficult to conduct electricity. Therefore, when current passes through, the light bulb may not turn on. Iron is a common magnetic element, but many other elements have stronger magnetism. Many strong magnets are made by mixing rubidium, iron, and boron. Magnetic resistance is the measure of a permanent magnetic material's ability to withstand magnetic and non-magnetic interference and maintain its permanent magnetism.

How is a permanent magnetcreated? 

Some materials can be rubbed into magnets. The material is not iron; it is steel, but not all steel can be made into magnets because it contains its own substance. Stainless steel cannot be used as a magnet.

To make a magnet, all you need is a magnet and a screwdriver. Rub the magnetic part of the screwdriver back and forth with the magnet, from one end to the other, repeatedly, and a screwdriver with magnetism will be made.

How is permanent magnet produced? 

The manufacturing processes for wholesale neodymium magnets, samarium cobalt magnets, aluminium-nickel-cobalt magnets, and ferrite magnets are different. From a process point of view, there are sintered neodymium iron boron magnets and bonded neodymium iron boron magnets. We mainly discuss sintered neodymium iron boron magnets.

• Magnet manufacturing process: ingredients → ingot melting → powder making → pressing and shaping → sintering and annealing → magnetic testing → grinding and processing → cutting and processing → plating → finished products.

  
  

  Among them, ingredients are the basis, and sintering and annealing are key processes. The tools for producing neodymium iron boron magnets include melting furnaces, jaw crushers, ball mills, airflow mills, compression moulding machines, vacuum packaging machines, isostatic presses, sintering furnaces, heat treatment vacuum furnaces, magnetic performance testers, and Gauss meters.

  
  

• Tools for processing neodymium iron boron magnets:

  
  

  They include special slicers, wire-cutting machines, surface grinding machines, double-sided machines, punching machines, chamfering machines, and plating equipment.