The preparation of sintered NdFeB permanent magnet material by intergranular diffusion double alloy method can greatly improve the coercive force at the expense of less residual magnetism. The main alloy is generally selected to be close to Nd2Fe14b positive component alloy, and the quick-setting thin strip is adopted. The process of smelting alloy can effectively inhibit the appearance of α-Fe phase.
The strong magnetic strength of NdFeB materials makes magnetic levitation easier to achieve compared with developed countries. At this stage, domestically produced NdFeB magnets are used most in audio devices.
In the motor, and the last time of the oil well, and compared to the voice coil motor and other products, this is the field with the most foreign demand. The domestic application is still in its infancy. The reason is that the specifications and performance requirements of the magnets required in the voice coil motor field are relatively high. At present, most of the manufacturers in China are difficult to meet international standards, and most of the domestic NdFeB magnets It is applied to middle and low-end products, and its price is far lower than the international market price. Therefore, it is necessary to improve the competitiveness of the international market.
China's NdFeB materials industry must continuously accelerate technological innovation, strengthen the application and development of NdFeB permanent magnet materials to broaden the application range and deep application of NdFeB permanent magnet materials. From the overall perspective, China's magnetic materials technology level is close to international. Level, but no self-intellectual and innovative products.