2:17 type samarium cobalt permanent magnet has excellent performance and huge potential for industry development

The second-generation 2:17 samarium-cobalt permanent magnet with both high Curie temperature and excellent magnetic stability is the first choice for high-temperature permanent magnet applications. It is used in electronic communications, electronic interference and countermeasures, precise guidance and positioning, aerospace and other national defense equipment. It plays an irreplaceable role in China and is one of the hot spots in the development of cutting-edge technology and strategic competition in various countries around the world. In recent years, 2:17 type samarium cobalt permanent magnets have also begun to be used in high-power traction motors in subways and high-speed rails. Due to the rich application scenarios, it is beneficial to the development of the 2:17 samarium cobalt permanent magnet industry, attracting many countries to deploy in this field, and the market competition is fierce.

According to the released “2022-2027 2:17 Type Samarium Cobalt Permanent Magnet Industry Market In-depth Research and Investment Prospect Forecast Analysis Report” It shows that as the application of samarium-cobalt permanent magnets in high-end magnetic power fields such as high-speed and high-temperature motors continues to increase, under the action of dynamic and complex multi-force field environments, the 2:17 type samarium-cobalt magnets are prone to fracture and fragmentation, which not only reduces the magnet’s The processing loss rate remains high, which greatly increases the cost of the magnet. Moreover, it is easily damaged during winding, assembly and high-speed rotation, which limits the assembly accuracy of the motor and brings great safety risks to equipment applications. It has become a constraint for high-speed permanent magnet motors. One of the main bottlenecks in performance.

By increasing the Fe content, a higher theoretical magnetic energy product can be obtained. Therefore, the development of Fe-rich high magnetic energy product magnets can not only further reduce the size of equipment, but also significantly reduce production costs. It is an important development direction in the current field of samarium-cobalt permanent magnets. In view of the reason that it is difficult to form a complete nanocellular structure when the Fe content is increased, pulverizing technologies such as hydrogen crushing and jet milling have been developed at home and abroad, as well as microstructure control technologies such as intermediate heat treatment and pre-aging, multi-stage aging treatment, and dual alloys to promote The research and development of high magnetic energy deposited samarium cobalt.

2:17 type samarium cobalt sintered magnets can be mainly divided into three categories: high magnetic energy product, high operating temperature and low temperature coefficient. Among them, high magnetic energy product magnets are an important basis for ensuring the miniaturization and efficiency of high-power motors and other equipment. Obtaining higher magnetic energy product has been the development goal since the advent of 2:17 samarium cobalt for more than 40 years. With the continuous deepening of research and the advancement of modern technology, the production and application of 2:17 type samarium cobalt permanent magnets have also made leaps and bounds.

Industrial analysts said that the application scope of 2:17 type samarium cobalt high-temperature permanent magnet materials continues to expand, and improving the magnetic energy product is currently the An important development direction of materials. Focusing on the magnetic performance bottleneck of Fe-rich magnets, new technologies such as intermediate heat treatment, multi-stage aging and dual alloys have been developed at home and abroad in recent years to optimize the cellular microstructure and effectively increase the magnetic energy product and coercive force. Constructing a complete nanocell-like structure in magnets with higher Fe content to obtain high squareness and coercive force is expected to further increase the magnetic energy product.