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Nano crystal soft magnetic alloy superthin belt and mfg method thereof

A nanocrystalline soft magnetic and ultra-thin ribbon technology, which is applied in the direction of magnetic materials, magnetic objects, and inorganic materials, can solve problems such as poor fluidity of molten alloys, increased material costs, and difficult preparation of original amorphous ribbons, reducing production. Effects of cost, increased liquidity, broad research and market application prospects

Inactive Publication Date: 2003-10-22
TONGJI UNIV
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Problems solved by technology

Although Finemet alloy has excellent soft magnetic properties, but because the alloy contains expensive Nb, the cost of the material is increased, and the viscosity of molten steel is high, the higher the Nb content, the worse the fluidity of the molten alloy, and the original amorphous ribbon is not easy to prepare

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  • Nano crystal soft magnetic alloy superthin belt and mfg method thereof

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Embodiment Construction

[0024] The preparation process of the soft magnetic alloy ultra-thin strip is as described above. During vacuum smelting, the vacuum degree is 6×10 -3 Pa, the smelting temperature is 1000°C, and the master alloy is prepared. In the preparation of the amorphous ribbon, a single-roll quenching device is used, as shown in Fig. 1 . The shielding gas is Ar, the pressure is 500Pa, and the linear speed of the roller is 40-70m / s, and the thickness of the obtained nanocrystalline ultra-thin ribbon is 14 microns, and the width is 20 mm. When the annealing temperature is 540°C, the content of nanocrystals in the ultrathin ribbon is 63.2%, and when the annealing temperature is 600°C, the content of nanocrystals is 73.9%. Its magnetic properties are as follows:

[0025] Saturation flux density: B 30 = 1.4T; B 10 =1.3T,B s Up to 1.7T

[0026] Magnetic permeability: μ i =3.8×10 4

[0027] Coercivity: H c =0.12Oe=9.6A / m

[0028] Iron loss: P 10 / 400 = 1.9097w / kg; P 2 / 100K ...

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Abstract

This invention relates to a new type nanometer crystal Fe-Zr-Nb-Si-Al-Cu series soft magnetic alloy super thin band and its process technology in which, the mother alloy is smelted by vacuum IF induction oven, an amorphous band is processed by a single quick cooling device to be processed by magnetic field heating at last to get the needed product with good soft magnet performance and iron core made by the super thin band improves its magnetic performance greatly.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a novel nanocrystalline Fe-Zr-Nb-Si-Al-Cu system soft magnetic alloy ultra-thin strip and a preparation process thereof. Background technique [0002] The typical composition of traditional nanocrystalline soft magnetic alloys is Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 , the grade is Finemet. Although Finemet alloy has excellent soft magnetic properties, but because the alloy contains expensive Nb, the cost of the material is increased, and the viscosity of molten steel is high, the higher the Nb content, the worse the fluidity of the molten alloy, and the original amorphous ribbon is not easy to prepare . Contents of the invention [0003] The object of the present invention is to provide a novel nanocrystalline soft magnetic alloy ultra-thin strip with excellent soft magnetic properties and lower production cost and its preparation process. [0004] The nanoc...

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Application Information

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IPC IPC(8): B22D11/06C21D1/00C22C38/14H01F1/147H01F1/16
Inventor 严彪唐人剑陆伟杨磊殷俊林
Owner TONGJI UNIV
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