The concept of magnet
Soft magnets include silicon steel sheets and soft magnet cores; hard magnets include alnico, samarium cobalt, ferrite and neodymium iron boron. Among them, the most expensive is samarium cobalt magnets, and the cheapest is ferrite magnets. The highest performance is NdFeB magnet, but the most stable performance and the best temperature coefficient is AlNiCo magnet. Users can choose different hard magnetic products according to different needs.
When we talk about magnets, we generally refer to permanent magnets.
Permanent magnets are divided into two categories. Metal alloy magnets include neodymium iron boron magnet (Nd2Fe14B magnet), samarium cobalt magnet (SmCo magnet), aluminum nickel cobalt magnet (ALNiCO magnet), iron chromium cobalt magnet (FeCrCo magnet)
Sintered iron boron: It is a new type of permanent magnet material developed after 1983. It has extremely high magnetic properties and is widely used in various permanent magnet motors, engineering machinery, electro-acoustics, electrical appliances and medical equipment.
Sintered samarium cobalt permanent magnet is an excellent permanent magnet material, which has high magnetic measurement performance, and at the same time has strong corrosion resistance, oxidation resistance, low temperature coefficient, high Curie temperature, and can be used in higher environments. It is widely used in motors, sensors, detectors, radars and other high-tech fields.
AlNiCo is suitable for producing complex shapes. Light, thin and small products are widely used in instrumentation, communications, magnetic switches and various sensors.
FeCrCo magnet (FeCrCo magnet) is a transformer in permanent magnets, alloy permanent magnets are the most deformable, and can be drawn (0.2-0.3mm) for pipe, strip, and various machining processes. A. FeCrCo (iron-chromium-cobalt) deformed permanent magnet alloy has higher magnetic properties, comparable to AlNiCo permanent magnet alloy, but its Co content is about 50% lower than AlNiCo. B. FeCrCo alloy has excellent plasticity and ductility and is easy to process. This is the unmatched characteristics of cast permanent magnet alloys. The higher service temperature of this alloy is about 400, which is inaccessible to NdFeB rare earth permanent magnets. C. FeCrCo alloy can be processed into wires, rods, tubes, belts and forgings. After machining, turning, milling, planing, drilling and punching, it can be made into various permanent magnetic components with complex shapes, especially for small , Long and thin components show unique characteristics. The thinnest strip can reach 0.05mm, and the thinnest wire can be processed to 0.1mm. Ferrite permanent magnet material (Ferrite)
