Nanocrystalline complex phase neodymium iron boron permanent magnet texturing enhancement preparation method
A NdFeB, permanent magnet technology, applied in magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of uneven distribution of low melting point grain boundary phase, short deformation time, flaky crystal growth, etc. , to inhibit the formation and expansion of cracks, improve densification and magnetic properties, and enhance the texture of hard magnetic phase
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Embodiment 1
[0022] In this embodiment, the raw material is commercial rare-earth-poor dual-phase magnetic powder NdFeB (15-7) purchased from Magnequench Magnetics (Tianjin) Co., Ltd., and the raw material and low melting point alloy powder Nd 70 Cu 30 mixing, the doping amount of the Nd-Cu alloy powder accounts for 8% of the mass of the raw material to obtain the doped raw material.
[0023] The preparation method of this Nd-Cu alloy powder is as follows:
[0024] (1) According to the composition of NdCu alloy, Nd is obtained by vacuum induction melting 70 Cu 30 alloy ingot;
[0025] (2) Broken the Nd under the protection of argon 70 Cu 30 Alloy ingots are ground and sieved to obtain NdCu alloy powders with a particle size below 90um;
[0026] Using this doping raw material, the anisotropic Nd 2 Fe 14 B complex phase permanent magnet block material, as follows:
[0027] (1) Hot pressing process: put the quantitative amount of the doped raw material into the cemented carbide mold,...
Embodiment 2
[0030] In this embodiment, the same doping raw materials as in Embodiment 1 are used.
[0031] Using this doping raw material, the anisotropic Nd 2 Fe 14 B complex phase permanent magnet block material, as follows:
[0032] (1) is exactly the same as the step (1) of embodiment 2;
[0033] (2) It is basically the same as step (2) of Example 2, the only difference is that the deformation rate along the pressure direction v=2um / s is controlled under the condition of 600°C to carry out hot pressing deformation to the predetermined size, and the double Composite permanent magnet block material.
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