A low-cost corrosion-resistant single crystal magnetic powder, and a preparation method and application thereof
A corrosion-resistant, low-cost technology, applied in the field of low-cost corrosion-resistant single crystal magnetic powder and its preparation, can solve the problems of tight supply of Sm element, limited global production, and reduce the coercive force of magnetic powder, etc., and achieve the effect of simple operation
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[0031] The method for preparing the above-mentioned low-cost corrosion-resistant single-crystal magnetic powder may include, for example, the following steps: preparing nitride raw material magnetic powder, and then performing galvanizing treatment.
[0032] Wherein, preparing the nitride raw material magnetic powder may comprise the following steps:
[0033] The master alloy is melted and cast into ingots. Specifically, using metal elements Sm, R1, T, M1 and Cu as raw materials, according to the chemical formula ratio (Sm 1-α R1 α ) a T 100-a-b-c-d-v M1 b Cu c For batching, the master alloy is melted by induction under the protection of argon, and the melt is cast into cast pieces by using a water-cooled copper roller with a speed of 2-20m / s.
[0034] In some embodiments, when the quick-setting ingot technology is used to prepare the cast sheet, for example, the surface linear velocity range of the copper roller can be controlled at 2-20m / s, and the thickness of the obt...
Embodiment 1
[0058] With a purity of 99.9% pure Sm, pure Ce, pure Fe, pure Zr and pure Cu metals as raw materials, according to the following chemical formula ingredients: (Sm 0.4 Ce 0.6 ) 11.58 Fe 86.42 Zr 1.00 Cu 1.00 (at%). Since Sm is easy to volatilize, an extra 10% is added on the basis of the theoretical value as compensation.
[0059] The prepared metal raw materials are put into an induction melting furnace and smelted in high-purity Ar. Induction heating is used to heat the alloy until the raw materials are completely melted and uniform. At this time, the temperature of the melt is about 1550°C. The speed of water-cooled copper rolls is used to prepare quick-setting cast sheets. The surface speed of the copper rolls is 10m / s.
[0060] The cast piece was placed in a corundum crucible, and the first heat treatment was performed for 20-30 minutes under the protection of argon at 800-1000°C (specifically corresponding to the heat treatment conditions of the master alloy in Tabl...
Embodiment 2
[0072] With a purity of 99.9% pure Sm, pure Ce, pure Fe, pure Zr and pure Cu metals as raw materials, according to the following chemical formula ingredients: (Sm 0.6 Ce 0.4 ) 11.58 Fe 86.42 Zr 1.00 Cu 1.00 (at%). Since Sm is easy to volatilize, an extra 10% is added on the basis of the theoretical value as compensation.
[0073]The prepared metal raw materials are put into an induction melting furnace and smelted in high-purity Ar. Induction heating is used to heat the alloy until the raw materials are completely melted and uniform. At this time, the temperature of the melt is about 1550°C. The speed of water-cooled copper rolls is used to prepare quick-setting cast sheets. The surface speed of the copper rolls is 10m / s.
[0074] The cast piece was placed in a corundum crucible, and the first heat treatment was performed for 20-30 minutes under the protection of argon at 800-1000°C (specifically corresponding to the heat treatment conditions of the master alloy in Table...
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