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Grain Refining Technology

Grain refining refers to the technique of modifying a metal's grain structure to achieve finer and more uniform grains, which directly contributes to improved mechanical properties such as strength, toughness, and ductility, while also enhancing the material's workability and weldability. Our guide dives into the scientific principles behind grain refining, the various methods employed to achieve grain refinement, and the measurable benefits of these processes on material performance.

Grain Refining Technology is an effective approach to enhance the intrinsic coercivity of sintered Neodymium Magnets, thus it is regarded as a main solution to prepare high intrinsic coercivity magnets with low/free heavy rare earth elements.

Theoretical and experimental results show that under the same alloy composition, fine-grained magnetic powder can obtain higher intrinsic coercive field strength HcJ. By refining the grain size and optimizing the sintering process, the grain size of Sintered Neodymium Magnets is reduced, leading to an increase in the intrinsic coercive field strength HcJ of the magnet.

Besides, Grain Refining Technology has no limit on the dimension, unlike Grain Boundary Diffusion technology.


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