How does the manufacturing process of Special Shaped NdFeB Magnet affect its performance?

Special Shaped NdFeB Magnet plays a key role in many high-tech fields. Its manufacturing process directly determines its performance, which in turn affects the quality and application effects of related products.
The purity and proportion of raw materials are critical in the manufacturing process. High-purity neodymium, iron, boron and other raw materials and precise ratios are the basis for manufacturing high-performance special-shaped neodymium-iron-boron magnets. If the purity of the raw materials is insufficient or the ratio is deviated, the internal crystal structure of the magnet will be uneven, thus affecting its magnetic properties. Key indicators such as remanence, coercive force and magnetic energy product will be reduced. This will make the magnet have insufficient suction power in practical applications and cannot meet the expected working requirements. For example, in a motor, it will reduce the torque output of the motor and affect its power performance.
The molding process has a significant impact on the performance of special-shaped NdFeB magnets. Common forming methods include powder metallurgy, etc. During the powder metallurgy molding process, parameters such as powder particle size, pressing pressure and sintering temperature need to be strictly controlled. Appropriate powder particle size can ensure good contact and filling between particles during the pressing process, forming a dense body. The size of the pressing pressure determines the density and internal stress distribution of the green body. Too much or too little pressure will cause defects in the green body and affect the magnetic properties after subsequent sintering. The sintering temperature directly affects the growth and phase transformation of crystals. If the sintering temperature is too high, problems such as grain growth and grain boundary phase changes may occur, which will reduce the coercive force of the magnet. If the sintering temperature is too low, it will lead to incomplete sintering, which will increase the density and magnetic properties of the magnet. discount.
The surface treatment process is also a link that cannot be ignored. Special-shaped NdFeB magnets are easily oxidized, and surface treatment can improve their oxidation resistance and corrosion resistance. For example, electroplated metal coatings such as nickel, zinc, and chromium can form a protective film on the surface of the magnet to prevent oxygen and moisture from contacting the internal materials of the magnet. At the same time, surface treatment can also improve the appearance and workability of the magnet to facilitate subsequent assembly and use. If the surface treatment process is improper, such as uneven coating thickness, poor bonding force, etc., it will not only be unable to effectively protect the magnet, but the coating may also fall off during use, accelerating the oxidation corrosion of the magnet, thereby reducing its service life and stable magnetic performance. sex.
In addition, during special-shaped processing such as cutting and grinding, the processing accuracy and processing thermal effects will affect the performance of the magnet. High-precision processing can ensure that the shape and size of the magnet meet the design requirements and make the magnetic field evenly distributed. If the heat generated during the processing cannot be dissipated in time, it will cause the local temperature to rise, causing changes in the internal structure of the magnet, thus affecting the magnetic performance.
All aspects of the manufacturing process of Special Shaped NdFeB Magnet are closely connected, from raw materials to molding, surface treatment and processing. Errors or deviations in any link may have a negative impact on its performance. Therefore, during the production process, every process parameter must be strictly controlled to ensure the production of high-performance, high-quality special-shaped NdFeB magnets to meet the growing demand for them in the modern technology field.