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Soft magnetic alloy thin strip, manufacturing method thereof, and magnetic component having soft magnetic alloy thin strip

A soft magnetic alloy, thin strip technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of higher insulation, lower saturation magnetic flux density, too thick oxide film, etc., to achieve excellent insulation, Effects of high saturation magnetic flux density and low core loss

Active Publication Date: 2011-12-14
PROTERIAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no example of heat treatment in the atmosphere
If an Fe-based alloy thin strip in which fine crystal grains with an average particle size of 30 nm or less are precipitated in an amorphous state with a volume fraction of less than 30% is heat-treated in the atmosphere, the oxide film formed on the surface becomes too thick and the insulation becomes high. , there will be a problem that the so-called primary saturation flux density tends to decrease

Method used

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  • Soft magnetic alloy thin strip, manufacturing method thereof, and magnetic component having soft magnetic alloy thin strip
  • Soft magnetic alloy thin strip, manufacturing method thereof, and magnetic component having soft magnetic alloy thin strip
  • Soft magnetic alloy thin strip, manufacturing method thereof, and magnetic component having soft magnetic alloy thin strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] The alloy melt with the composition shown in Table 1 was rapidly cooled in the atmosphere by a single roll method, and the temperature when it was peeled off from the roll surface was changed to obtain fine crystal nuclei with an average particle size of 30 nm or less in the amorphous phase at a density of 2 A thin ribbon of primary microcrystalline alloy with a width of 5 mm and a thickness of 16 to 25 μm with a dispersed structure of ~25% volume fraction. The peeling temperature of the primary microcrystalline alloy ribbon was measured by the following method.

[0101] The initial microcrystalline alloy strip was placed in a furnace with an oxygen concentration of 10% in a nitrogen atmosphere, the temperature was raised at an average of 120°C / min, and the nanocrystallization heat treatment was carried out under the conditions of maintaining the maximum temperature of 450°C for 5 minutes . The average particle size and volume fraction of the fine crystal grains in the...

Embodiment 2

[0145] Except that the peeling temperature was 300°C, the method was the same as in Example 1, and Fe bal. Ni 1 Cu 1 Nb 1 Si 4 B 12 The alloy melt (sample 3-1) has the same composition (Fe bal. Cu 1 Nb 1 Si 4 B 12 ) alloy melts (sample 3-2), soft magnetic alloy ribbons having a structure in which fine crystal grains with an average particle diameter of 60 nm or less are dispersed in an amorphous phase at a volume fraction of 50% or more were produced. The concentration distributions of Fe, Ni, B, Si, Cu, Nb and O from the free surface to the inside of each ribbon were measured by GDOES. The measurement results of sample 3-1 are shown in FIG. 5 , and the measurement results of sample 3-2 are shown in FIG. 6 . The origin in FIGS. 5 and 6 corresponds to the surface of the sample.

[0146] In Sample 3-1, the boundary between the oxide film and the nanocrystalline layer was around 40 nm, and a high B concentration amorphous layer with the highest B concentration existed ...

Embodiment 3

[0148] Except that the exfoliation temperature was 300° C., by the same method as in Example 1, fine crystal grains having an average grain size of 60 nm or less in the amorphous phase were produced from the alloy melt having the composition shown in Table 5. A soft magnetic alloy strip with a dispersed structure with a volume fraction of more than 50%. For each soft magnetic alloy ribbon, the depth at which the concentration of B reaches the highest was measured. In addition, the core loss (P 10 / 1k ). The results are shown in Table 5.

[0149] [table 5]

[0150]

[0151] As can be seen from Table 5, the high B-concentration amorphous layer has a depth in the range of 30 to 100 nm. Furthermore, the core loss (P 10 / 1k ) can be controlled at less than 5W / kg.

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Abstract

Disclosed is a method for producing a soft magnetic alloy thin strip which has a composition represented by Fe100-x-y-zAxByXz (wherein A represents Cu and / or Au; X represents at least one element selected from among Si, S, C, P, Al, Ge, Ga and Be; and x, y and z respectively represent the numbers expressing the atom% of the elements and satisfying 0 < x = 5, 10 = y = 22, 1 = z = 10 and x + y + z = 25), and comprises a matrix wherein fine crystal grains having an average grain size of 60 nm or less are dispersed at a volume fraction of 50% or more. In the soft magnetic alloy thin strip, a part of the oxide coating film formed on the surface is a layer that has a B concentration lower than the average B concentration of the matrix. In the method for producing a soft magnetic alloy thin strip, (1) an initial microcrystalline alloy thin strip, which has a matrix wherein fine crystal nuclei having an average grain size of 30 nm or less are dispersed in an amorphous phase at a volume fraction of more than 0% but less than 30%, is formed by jetting and quenching an alloy melt having the above-described composition on a rotating cooling roll, and then (2) the initial microcrystalline alloy thin strip is subjected to a heat treatment in an atmosphere having an oxygen concentration of 6-18%.

Description

technical field [0001] The present invention relates to a soft magnetic alloy thin strip not only having high saturation magnetic flux density and low magnetic core loss but also excellent insulation, corrosion resistance and toughness, its manufacturing method, and a magnetic part having the soft magnetic alloy thin strip. Background technique [0002] Silicon steel, ferrite, amorphous alloy, Fe based nanocrystalline alloys, etc. Silicon steel is inexpensive and has a high magnetic flux density, but has a large core loss for high-frequency applications, and it is difficult to form it as thin as an amorphous ribbon. Ferrite has a low saturation magnetic flux density, so it is easily magnetically saturated in high-power applications with high operating magnetic flux density. Co-based amorphous alloys are expensive, and for a practical composition, the saturation magnetic flux density is as low as 1T or less. Therefore, if used for high-power applications, the parts become l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/153C21D6/00C22C38/00C22C45/02H01F1/18H01F27/24
CPCC22C38/02H01F1/15391C22C38/32B82Y25/00B82Y30/00H01F1/153C21D8/1211C21D1/76C21D8/1244C22C38/16C21D1/74C21D2201/03H01F1/15333
Inventor 太田元基吉泽克仁
Owner PROTERIAL LTD
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