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Low-permeability, low-power consumption Fe-Si-Al soft magnetic material and production method thereof

A technology of soft magnetic materials and low magnetic permeability, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of high price and cost of gas atomization process, difficult to meet customer needs, and unsuitable for mass production , to achieve the effects of reducing oxygen content, using simple equipment, and reducing crushing time

Active Publication Date: 2015-02-04
德清鑫晨新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional atomization process, the oxygen content of water atomization is high and the loss is large, which makes it difficult to meet the needs of customers; the price and cost of the gas atomization process are high, not suitable for large-scale production, and the products are not competitive; The method of alloy crushing, due to the large size of the alloy block
Long crushing time leads to high heat and long contact time with air, which increases the oxygen content and affects the performance of the product

Method used

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  • Low-permeability, low-power consumption Fe-Si-Al soft magnetic material and production method thereof
  • Low-permeability, low-power consumption Fe-Si-Al soft magnetic material and production method thereof
  • Low-permeability, low-power consumption Fe-Si-Al soft magnetic material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 1% Cr in the process of manufacturing sendust powder (the weight content of Si in the sendust powder material is 9%-10%, the weight content of Al is 5%-6%, and the balance is Fe), and then pass The traditional gas atomization process is used to prepare the new No. 1 sendust powder.

[0031] Take 1000g of No. 1 sendust powder, roast the prepared sendust powder until the temperature reaches 100°C, add 2.5% phosphoric acid diluent for surface treatment, and continue roasting until dry; then soften the sendust Magnetic powder compression molding: the pressure is 20 tons / cm 2 ; and through heat treatment, hydrogen or nitrogen gas is passed into the heat treatment furnace, the temperature is controlled at 750±3°C, and the heat treatment time is 150 minutes; finally, epoxy resin paint is used to coat the surface of the powder core. Obtained 2 sendust products with specifications of Φ26.9 / Φ14.7×11.2 (that is, the outer diameter is 26.9mm, the inner diameter is 14.7mm, and ...

Embodiment 2

[0050] Add 1% Cr (as Example 1) in the process of manufacturing sendust powder, and then pass through a similar amorphous rapid cooling process, that is, in the powder making process, the strip is made by using the high-speed cooling method of the strip machine, and the cooling rate is 10 5 ℃ / second; and the ordinary crushing method to obtain the new No. 2 sendust powder.

[0051] Take 1000g of No. 2 sendust powder, press the sendust powder into a size of Φ26.9 / Φ14.7×11.2 according to the process steps of Example 1 (that is, the outer diameter is 26.9mm, the inner diameter is 14.7mm, and the height is 11.2mm) Specifications of 2 sendust products. Other conditions remain unchanged.

[0052] (1) f﹑L﹑Q test

[0053] The copper wire is Φ0.5mm, the number of coil turns is 26 turns, and its magnetic performance parameters are shown in Table 5

[0054] table 5

[0055]

[0056] (2) Power loss test

[0057] The copper wire is Φ0.8mm, the number of coil turns is 34 turns, and its...

Embodiment 3

[0069] Add 1% Cr (as Example 1) in the process of manufacturing sendust powder, and then pass through a similar amorphous rapid cooling process, that is, in the powder making process, the strip is made by using the high-speed cooling method of the strip machine, and the cooling rate is 10 4 ~10 6 °C / sec; and through mechanical crushing under the protection of the atmosphere, it is made into flat sendust powder.

[0070] Take 1000g of No. 3 sendust powder, press the sendust powder into a specification of Φ26.9 / Φ14.7×11.2 according to the process steps of Example 1 (that is, the outer diameter is 26.9mm, the inner diameter is 14.7mm, and the height is 11.2mm ) specifications of 2 sendust products.

[0071] Other conditions remain unchanged.

[0072] (1) f﹑L﹑Q test

[0073] The copper wire is Φ0.5mm, the number of coil turns is 26 turns, and its magnetic performance parameters are shown in Table 9

[0074] Table 9

[0075]

[0076] (2) Power loss test

[0077] The copper...

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Abstract

The invention relates to a production method for a magnetic material, in particular to a low-permeability, low-power consumption Fe-Si-Al soft magnetic material and a production method thereof. The production method for the low-permeability, low-power consumption Fe-Si-Al soft magnetic material includes the following steps: (1) In the process of producing Fe-Si-Al powder, a melt-spinning machine rapid cooling method is adopted to produce a strip, and flat Fe-Si-Al powder is produced by atmosphere-protected mechanical crushing; (2) when the produced Fe-Si-Al powder is roasted until the temperature reaches 80 DEG C to 120 DEG C, phosphoric acid diluent is added for surface treatment, and the Fe-Si-Al powder then continues to be roasted to become dry; (3) the Fe-Si-Al alloy soft magnetic powder is pressed to be shaped; (4) in heat treatment, hydrogen or nitrogen is filled into a heat treatment furnace; (5) epoxy resin paint is applied on the surface of the soft magnetic material. The invention has the advantages that: the oxygen content of the powder is greatly decreased, the grain size of the product is reduced, consequently, the loss of the Fe-Si-Al product is reduced, and the properties of the product are enhanced.

Description

technical field [0001] The invention relates to a method for manufacturing magnetic materials, in particular to a soft magnetic material with low magnetic permeability and low power consumption and a preparation method thereof. Background technique [0002] At present, with the reform of energy technology, magnetic materials are developing rapidly. Among so many magnetic materials, sendust materials are widely used in small and medium-sized devices due to their high magnetic induction intensity, low loss and high cost performance. . However, due to the high loss caused by the powder making process, or the excellent performance but low production volume, there are basically no large-scale manufacturers found. In view of the rapid development trend of magnetic materials, the product loss is low, the process is simple, and it can be mass-produced. Milling process is already an urgent need. [0003] For this reason, the Chinese invention patent application (application number:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22D11/06C22C38/06C22C38/34C22C38/40H01F1/147
Inventor 柯昕
Owner 德清鑫晨新材料有限公司
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