Amorphous alloy strip and preparation method thereof

A technology of amorphous alloys and strips, applied in the field of transformers, can solve the problems of reducing the critical size of amorphous alloys, affecting the yield of amorphous alloy strips, and losing application value

Inactive Publication Date: 2017-06-20
SICHUAN FUXI ELECTRIC POWER EQUIP MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These active elements are easily oxidized during the forming process of the amorphous alloy, thus forming countless heterogeneous nuclei inside the formed amorphous alloy stri

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A master alloy containing 10% by mass of Si, 4% of B, 3% of C, 2% of Nb and the balance of Fe was put into a vacuum crucible. After the crucible is closed, an inert gas represented by argon is input into the interior. The inert gas should be input from the bottom of the crucible, pass through the interior, and then output from the top of the crucible. At the same time, start to heat the crucible, and keep the vacuum inside the crucible at 500 Pa. When heating, it should be heated slowly and counted from the start of heating. The heating temperature is 500°C for 0-10 minutes, 1100°C for 10-25 minutes, and 1370°C for the remaining time. The whole heating process should last for 30 minutes. Finally, under vacuum conditions, a finished amorphous alloy strip with a thickness of 0.020 mm and a width of 150 mm was prepared by a single-roll method.

[0023] A small amount of C element is added to the amorphous alloy strip, and the addition of C element can not only consume the...

Embodiment 2

[0026] A master alloy containing 15% by mass of Si, 6% of B, 5% of C, 4% of Nb and the balance of Fe was put into a vacuum crucible. After the crucible is closed, an inert gas represented by argon is input into the interior. The inert gas should be input from the bottom of the crucible, pass through the interior, and then output from the top of the crucible. At the same time, start to heat the crucible, and keep the vacuum inside the crucible at 750pa. When heating, it should be heated slowly, counting from the start of heating, the heating temperature is 500°C for 0-10 minutes, 1100°C for 10-25 minutes, and 1370°C for the remaining time, and the whole heating process should last for 35 minutes. Finally, under vacuum conditions, a finished amorphous alloy strip with a thickness of 0.020 mm and a width of 270 mm was prepared by a single-roll method.

Embodiment 3

[0028] A master alloy containing 12% by mass of Si, 4.5% of B, 5% of C, 3% of Nb and the balance of Fe was put into a vacuum crucible. After the crucible is closed, an inert gas represented by argon is input into the interior. The inert gas should be input from the bottom of the crucible, pass through the interior, and then output from the top of the crucible. At the same time, start to heat the crucible, and keep the vacuum inside the crucible at 1000pa. When heating, it should be heated slowly, counting from the start of heating, the heating temperature is 500°C for 0-10 minutes, 1100°C for 10-25 minutes, and 1370°C for the remaining time, and the whole heating process should last for 40 minutes. Finally, under vacuum conditions, a finished amorphous alloy strip with a thickness of 0.035 mm and a width of 270 mm was prepared by a single-roll method.

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Abstract

The invention discloses an amorphous alloy strip and a preparation method thereof. The amorphous alloy strip comprises the following components by mass percent: 10-15% of Si, 4-6% of B, 3-5% of C, 2-4% of Nb and the balance Fe. The preparation method of the amorphous alloy strip comprises the following steps: (1) Si, B, C, Nb and Fe at the corresponding mass percent are put into a crucible: (2) an inert gas is input to the crucible from the bottom of the crucible, passes through the interior of the crucible, then reaches the top of the crucible and is output, the internal vacuum degree of the crucible is kept constant, and slow heating is carried out till a mother alloy in the crucible is in a molten state; and (3) under a vacuum condition, the amorphous alloy strip is prepared by adopting a singlestick process. The amorphous alloy strip is mainly applied to an amorphous alloy transformer, the occurring probability of heterogeneous nucleation can be reduced, and a yield of the amorphous alloy strip is raised.

Description

technical field [0001] The invention relates to the field of transformers, in particular to an amorphous alloy strip suitable for making transformer iron cores and a preparation method for the amorphous alloy strip. Background technique [0002] At present, the amorphous alloy strips suitable for making transformer iron cores present an atomic arrangement structure with short-range order and long-range disorder. The amorphous alloy iron core has the advantages of high strength and high elastic limit, and more importantly, compared with the traditional silicon steel sheet type iron core, its no-load loss can be reduced by 70% to 80%, thereby saving a lot of electric energy. [0003] However, a small amount of active elements, such as magnesium, aluminum, zirconium, titanium, etc., are usually contained in the master alloy for the preparation of amorphous alloys. These active elements are easily oxidized during the forming process of the amorphous alloy, thus forming countles...

Claims

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Application Information

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IPC IPC(8): C22C45/02B22D11/06H01F1/153
CPCC22C45/02B22D11/0611C22C33/003H01F1/15308H01F1/15341
Inventor 郭建国
Owner SICHUAN FUXI ELECTRIC POWER EQUIP MFG CO LTD
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