The road to excellence of sintered samarium cobalt magnets: the secret of tempering treatment

Sintered samarium cobalt magnets, as the leader of rare earth permanent magnet materials, every step in its production process is crucial, especially the tempering treatment after sintering. This step is not only a further sublimation of product performance, but also the key to ensure that it can play the best performance in practical applications.

In the production process of sintered samarium cobalt magnets, the high-temperature sintering process forms a strong metallurgical bond between powder particles, greatly improving the density and strength of the product. However, this process is also accompanied by the accumulation of internal stress and the instability of the magnetic domain structure. In order to overcome these potential problems, tempering treatment came into being and became an indispensable and important step after sintering.

The main purpose of tempering treatment is to optimize the magnetic properties and stability of the product through further heat treatment. Specifically, it uses appropriate temperature and time conditions to gradually release the accumulated stress inside the product, while promoting the rearrangement and stabilization of the magnetic domain structure. This process helps to reduce the microscopic defects caused by the sintering process and improve the overall performance of the product.

The magnetic properties of sintered samarium-cobalt magnets after tempering treatment have been significantly improved. The release of internal stress makes the magnetic domains more orderly, thereby improving key magnetic performance indicators such as remanence and coercivity. At the same time, the stability of the magnetic domain structure also reduces the interference of the external magnetic field on the product performance, ensuring the stable output of the product under different environments.

In addition to the improvement of magnetic properties, tempering treatment also significantly enhances the stability of sintered samarium-cobalt magnets. During the high-temperature sintering process, although metallurgical bonding is formed between the powder particles, there may still be certain instability factors inside the material. Tempering treatment reduces the influence of these unstable factors by adjusting the microstructure of the material, and improves the product's corrosion resistance, oxidation resistance, and thermal shock resistance. This enables sintered samarium-cobalt magnets to maintain stable performance output even in extreme environments.

Thanks to the excellent performance and stability improvement brought by tempering treatment, sintered samarium-cobalt magnets have been widely used in many fields. In the aerospace field, it has become an ideal material for manufacturing key components such as navigation systems and gyroscopes; in the field of national defense and military industry, its high magnetic properties and stability meet the stringent requirements of precision instruments and equipment; in the field of microwave devices and communications, sintered samarium cobalt magnets are used to manufacture key components such as filters and isolators; in addition, in the field of medical equipment, its stable magnetic properties and good biocompatibility also make it an important material for manufacturing equipment such as magnetic resonance imaging.

As an important link in the production process of sintered samarium cobalt magnets, tempering treatment plays an irreplaceable role in improving the magnetic properties and stability of products. In the future, with the continuous advancement of technology and continuous optimization of processes, the performance of sintered samarium cobalt magnets will be further improved, providing strong support for high-performance needs in more fields. At the same time, we also look forward to more breakthroughs and innovations in the field of tempering treatment to promote the sustainable development of the sintered samarium cobalt magnet industry.