The relationship between the magnetic properties of AlNiCo magnets and temperature
AlNiCo permanent magnet alloy is the most important permanent magnet material in modern times, because it has high permanent magnet performance, good stability, and small temperature coefficient. Therefore, it is widely used in electric power, instrumentation, electronics industry and cutting-edge science and technology. have been widely used.
The technological process of casting AlNiCo permanent magnet material mainly includes nine processes, among which batching and magnetic field heat treatment are the key processes. At home and abroad, the magnetic field heat treatment method is mainly used to improve the magnetic properties of the material. This method is composed of magnet preheating, high temperature solid solution, magnetic field cooling, magnetic field isothermal, and multi-stage aging treatment. Magnetic components that meet the requirements of energy and collection shape.
2. The mechanism of magnetic field heat treatment
Cool the AlNiCo magnet to 50∽1000 degrees above the Curie point (that is, about 900 degrees) and place it in a magnetic field, continue to cool at a certain speed, or keep it in a thermal magnetic treatment furnace for a period of time, relying on the action of the magnetic field to make The α1 phase formed by AM decomposition is arranged along the easy magnetization direction close to the external magnetic field, forming a magnetic texture to obtain high coercivity. The cooling rate in the magnetic field should not be too fast, so that the decomposition of α into α1 + α2 is fully completed; but the cooling rate should not be too slow to ensure the highly dispersed distribution of the α1 phase. The specific critical cooling rate of AlNiCo in the magnetic field is determined by The test is determined, that is, it is determined according to the production process of the specified product.
Hunan Broad Permanent Magnet Co.,Ltd
Mr.Bade Wu
Tel: +86 731 89723018 M.P: 13974929339
Email: bade@bromag.com.cn
Add: 1218-1219, Building B, Accord International, No. 61 Lufeng Road, Changsha 410205 ,China
