A kind of high performance neodymium iron boron material and preparation method thereof

Abstract

The invention relates to the technical field of rare earth permanent magnet materials, in particular to a high-performance NdFeB material and a preparation method thereof. The magnet is prepared from the following raw materials: magnesium-neodymium alloy, zirconium-tin alloy, iron-cobalt alloy, boron-copper alloy, Ferro-cerium alloy, ferro-zinc alloy, ferro-molybdenum alloy, iron-silicon alloy, iron powder, calcium sulfate, manganese carbonate. The magnetic material of the present invention constitutes a composite crystal with higher adhesion, so that the material has more excellent magnetic properties, effectively prevents the increase of pores caused by surface wear during magnet processing, further reduces the performance of the magnet, and then improves the continuous use effect of the magnet in unfavorable environments. Especially in a high temperature environment, the magnetic properties of the magnet decay more slowly, significantly improve the impact resistance of the magnet, strengthen the mechanical properties of the magnet, and reduce the mechanical damage of the magnet in the assembly and use of various accessories.

Description

technical field [0001] The invention relates to the technical field of rare earth permanent magnet materials, in particular to a high-performance NdFeB material and a preparation method thereof. Background technique [0002] NdFeB magnetic material is an alloy composed of praseodymium neodymium metal and boron iron, also known as magnetic steel. NdFeB permanent magnet materials are widely used in emerging technical fields such as wind power generation, new energy vehicles, and maglev trains due to their excellent magnetic properties. As a technology invented at the same time as the sintering process, the thermal deformation process has been highly regarded by the majority of scientific researchers. Attention, it can be used to prepare full-density anisotropic NdFeB permanent magnets. It has many advantages such as simple preparation process, low energy consumption, high material utilization rate, good environmental stability, near-final forming and low temperature, and short...

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Problems solved by technology

[0003] There are many studies on NdFeB magnetic materials in the prior art, such as a kind of NdFeB magnetic material and its preparation method whose patent number is CN201811247522.6, using praseodymium neodymium alloy, dysprosium iron alloy, boron iron alloy, niobium iron alloy, yttrium iron alloy, Nano-silica, gallium, alumina, antioxidants, and iron make the coercivity of NdFeB magnetic materials higher, but the performance of magnet materials fluctuates greatly in extreme environments, especially in high-temperature environments; another example is the patent No. CN201711387664.8 is a nanocrystalline thermally deformed NdFeB permanent magnet and its preparation method, mainly using the element FeCoNiM1M2, wherein M1 and M2 are Cu, Al, Cr, Mn, Ga, Zn, Sn, Mg, Si, One or more of B, and M1 and M2 are different, making the magnet doped with high plasticity, medium strength and good soft magnetic properties, but the wear resistance of magnetic materials is poor, and there are many limiting factors in actual use

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