Magnets are natural magnetite, and the ancient Greeks and Chinese found a natural magnetized stone in nature, calling it "magnetite". This stone magically sucks up small pieces of iron and always points in the same direction after swinging at will. Early navigators used this magnet as their earliest compass to orient themselves at sea. The earliest discovery and use of magnets should be Chinese, that is, the use of magnets to make "compasses", one of the four major inventions in China.

Artificial magnets appeared in the 18th century, and Alnico was manufactured in the 2020s. Subsequently, ferrite (Ferrite) was manufactured in the 50s of the 20th century, and Rare earth magnets were made in the 70s [Rare Earth magnets including NdFeB and samarium cobalt (SmCo)]. With the development of the economy, magnets are also used more and more in people's lives, such as the maglev train we ride, the MRI in the hospital, the sound horn, the wind power generation system and so on... At present, the most widely used is NdFeB Magnets, known as the "king of Permanent magnets".

1. Raw material treatment: first batching, according to different magnet requirements for raw material proportioning, and then crushing, material breaking, rust removal and other treatments

2. Smelting: the prepared material is cast, so that the product components are evenly divided, the crystallization orientation is high, the structural consistency is good, and the formation of A-Fe is avoided

3. Hydrogen explosion: using the hydrogen-absorbing characteristics of rare earth intermetallic compounds, the NdFeB alloy is fused in a hydrogen environment, which improves the milling efficiency of airflow milling and reduces the generation cost

4. Milling: Powders collide and fuse with each other in the environment of high air pressure flow

5. Molding: The powder is pressed into the shape and size required by the customer to form N and S grades

6. Isostatic pressing pressing: like an object to release uniform pressure, the density of the product becomes smaller to meet the predetermined demand

7. Sintering: make the pressure ring undergo physical changes in a high temperature environment, change its microstructure, and improve its magnetic performance. Sintering is the final step in material forming and has an extremely important influence on the density and microstructure of the magnet

8. Post-processing: dimension, magnetic properties, density measurement and appearance inspection of magnet blanks, and then grinding and cutting processing

9. Surface treatment: such as nickel plating, galvanizing, epoxy, nickel, copper, nickel, etc., to ensure that the product is not corroded and the appearance is exquisite

10. Check and magnetize: check whether the appearance is intact, and then magnetize the magnet according to the requirements

11. Shipment: Packaging, delivery

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