Fe-based amorphous alloy ribbon

A technology of amorphous alloys and atoms, applied in the field of Fe-based amorphous alloy strips, which can solve the problems of brittle strips, inability to stably produce Fe-based amorphous alloy strips, surface crystallization and thermal stability decline, etc. question

Active Publication Date: 2006-01-18
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, embrittlement, surface crystallization, and decreased thermal stability are serious problems in Fe-based amorphous alloy ribbons with an Fe content of 81 at% or less
Although adding C and P can increase the saturation flux density, the resulting ribbons are too brittle to easily form them into transformers
[0005] As mentioned above, although efforts have been made to increase the saturation magnetic flux density of Fe-based amorphous alloy ribbons, due to reasons such as embrittlement, surface crystallization, and decrease in squareness ratio, Fe that meets the requirements of Based amorphous alloy strip: the B measured on the annular iron core of the Fe-based amorphous alloy strip 80 is 1.55T or above, while the core loss W 14 / 50 0.28W / g or more

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Composition of 200g as Fe 82 Si 2 B 14 C 2 The alloy is melted in a high-frequency electric furnace and sprayed through the furnace nozzle onto a copper roll rotating at 25 to 30m / s, while CO is blown from behind the nozzle 2 gas to produce Fe-based amorphous alloy ribbons with widths of 5 mm, 10 mm, and 20 mm and thicknesses of 23 to 25 μm. Each Fe-based amorphous alloy ribbon has a C-segregation layer at a depth of 2 to 20 nm from the surface. To minimize core loss, the Fe-based amorphous alloy ribbon was annealed at 300 to 400 °C. Change blown CO 2 Gas velocity, the properties of Fe-based amorphous alloy ribbons were measured. The results are shown in Table 1.

[0034] Measure B on a monolithic sample S and B 80 , and measure the core loss W 13 / 50 and W 14 / 50 , where W 13 / 50 is the core loss at 1.3T magnetic flux density and 50Hz frequency, W 14 / 50 It is the core loss at 1.4T magnetic flux density and 50Hz frequency.

[0035] Such as image 3 As shown ...

Embodiment 2

[0047] In the same manner as in Example 1, 200 g of an alloy melt having the composition shown in Table 3 was rapidly quenched to form a Fe-based amorphous alloy ribbon with a width of 5 mm and a thickness of 23 to 25 μm. The properties of each Fe-based amorphous alloy ribbon are listed in Table 3. B 80 High Fe-based amorphous alloy ribbons can maintain low core loss at high operating flux densities. Elemental analysis was performed in the depth direction of sample 8 from the roll contact surface thereof. The result is as Figure 5 shown. The average surface roughness Ra of samples 7 to 22 was 0.38.

[0048] sample

[0049] sample

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Abstract

An Fe-based amorphous alloy ribbon having a composition comprising FeaSibBcCd and inevitable impurities, wherein a is 76 to 83.5 atomic %, b is 12 atomic % or less, c is 8 to 18 atomic %, and d is 0.01 to 3 atomic %, the concentration distribution of C measured radially from both surfaces to the inside of said Fe-based amorphous alloy ribbon having a peak within a depth of 2 to 20 nm.

Description

technical field [0001] The invention relates to an Fe-based amorphous alloy strip, which has high magnetic flux density and low iron core loss, and is suitable for transformers, engines, generators, choke coils, magnetic sensors and the like. Background technique [0002] Fe-based amorphous alloy ribbons have attracted great interest for their use in transformer cores due to their excellent soft magnetic properties, especially low core loss. Especially amorphous Fe-Si-B alloy ribbons with high magnetic flux density BS and excellent thermal stability are used for magnetic cores of transformers. However, the Fe-based amorphous alloy ribbon is not as good as the current silicon steel sheet commonly used as a transformer core in terms of saturation flux density. Therefore, development studies have been initiated to provide Fe-based amorphous alloy ribbons with a high saturation magnetic flux density. In order to increase the saturation magnetic flux density, various attempts h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02
Inventor 小川雄一直江昌武吉泽克仁
Owner HITACHI METALS LTD
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