Method for manufacturing super-magnetic conducting nanocrystalline alloy and nanocrystalline alloy

A technology of nanocrystalline alloys and manufacturing methods, which is applied in the field of nanocrystalline alloys and can solve problems such as the influence of alloy properties that are not mentioned

Inactive Publication Date: 2008-09-03
北京冶科电子器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alloy has been industrialized at home and abroad, but the content of the patent does not mention the influence of the oxide content in the alloy on its performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The chemical composition of the master alloy is Fe73.1Cu1.0Nb3.1Si13.6B9.2 (at%); firstly, the master alloy is prepared by smelting in a vacuum furnace, and the vacuum degree is 0.020×10 -6 MPa, when the temperature reaches 1400°C, add 0.1% (wt%) C to deoxidize, cool down and deflate after refining, and cast ingots. Secondly, the master alloy is remelted under the protection of perlite mold slag, and deoxidizers such as silicon calcium powder are added at the same time to deoxidize again, and the slag is removed before tapping. Finally, under the protection of argon, after 25-30PPIAl 2 o 3 The ceramic filter is used to filter the molten steel, and the quenched amorphous nanocrystalline alloy strip is made by single-roll quenching. The width of the tape is 40mm, the thickness is 30μm, and the specification of the winding magnetic core is 25 / 30×40mm. Adopt the best heat treatment process under vacuum state at 545~550℃×1h for treatment, after treatment, cool in the furn...

Embodiment 2

[0014] The chemical composition of the master alloy is Fe73.3Cu0.9Nb3.2Si13.7B8.9 (at%); the smelting of the master alloy adopts a vacuum furnace with a vacuum degree of 0.018×10 -6 MPa, when the temperature reaches 1430°C, add 0.1% (wt%) C to deoxidize, cool down and deflate after refining, and cast into ingots. Secondly, the master alloy is remelted under the protection of perlite mold slag, and deoxidizers such as silicon calcium powder are added at the same time to deoxidize again, and the slag is removed before tapping. Finally, under the protection of argon, after 25-30PPIAl 2 o 3 The ceramic filter is used to filter the molten steel, and the quenched amorphous nanocrystalline alloy strip is made by single-roll quenching. The width of the tape is 25mm, the thickness is 30μm, the specification of the winding magnetic core is 25 / 30×25mm, and the best heat treatment process is used to treat it in a vacuum state at 545-550℃×1h. The magnetic permeability of the core is μ ...

Embodiment 3

[0016] The chemical composition of the master alloy is Fe73.4Cu1.2Nb3.0Si13.4B9.0, (at%); the smelting of the master alloy adopts a vacuum furnace with a vacuum degree of 0.011×10 -6 MPa, when the temperature reaches 1430°C, add 0.1% (wt%) C to deoxidize, cool down and deflate after refining, and cast ingots. Remelt under the protection of perlite mold slag, and at the same time add silicon-calcium powder deoxidizer for secondary deoxidation, and remove slag before tapping. Finally, under the protection of argon, after 25-30PPI Al 2 o 3 The ceramic filter is used to filter the molten steel, and the quenched amorphous nanocrystalline alloy strip is made by single-roll quenching. The width of the strip is 10mm, the thickness is 30μm, and the core size is 16 / 21×10mm. The best heat treatment process is used to treat it under vacuum at 545-550℃×1h. Magnetic permeability μ 50Hz (H=5mOe)=65×10 4 , μ 1kHz (H=5mOe)=27×10 4 . Detected SiO 2 =0.022%, B 2 o 3 = 0.017% (wt%).

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Abstract

The invention relates to a manufacture method for super magnetic conductive nanocrystal alloy, wherein a master alloy includes 72.5 to 74.5 at% of Fe, 0.5 to 1.5 at% of Cu, 2.5 to 3.5 at% of Nb, 12.5 to 14.5 at% of Si and 8 to 10 at% of B. The method comprises the following steps: the master alloy is prepared by vacuum furnace smelting, the vacuum degree is less than 0.026*10<-6>MPa; when the temperature reaches to 1400 DEG C to 1450 DEG C, C is added to the vacuum furnace for deoxidation and refined, the temperature is lowered to deflate, and an ingot is cast; under argon protection, quenched amorphous nanocrystal alloy is formed by single roller fast cooling through a nozzle packet; the nozzle packet is provided with 25-30PPI Al2O3 ceramic filter to filter steel liquid, making SiO2 less than 0.026% (wt%) and B2O3 less than 0.019% (wt%). The magnetic conductivity mu of the iron core of the super magnetic conductive nanocrystal alloy manufactured by the method satisfies the following conditions: mu50Hz (H=5mOe) >=60*10<4>, and mu1kHz (H=5mOe)>=20*10<4>.

Description

technical field [0001] The invention relates to a method for manufacturing an ultrahigh magnetic permeability nanocrystalline alloy and the nanocrystalline alloy. Background technique [0002] High magnetic permeability nanocrystalline alloy is a patent invented by Yoshizawa Katsuhito of Hitachi Metals Co., Ltd. in 1989 (Shao 64-31922). This patent discloses nanocrystalline alloys with various elements added, and the best composition is Fe73. (at%), μ1kHz (H=5mOe) reaches 101000 after heat treatment with the best technology. The alloy has been industrialized at home and abroad, but the content of the patent does not mention the influence of the oxide content in the alloy on its performance. In the study of permalloy, special emphasis is placed on the influence of inclusion (impurity) content on its magnetic permeability. The size of the coercive force Hc of the alloy is an important parameter that marks the soft magnetic properties of the alloy. The coercive force Hc mark...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C38/16
Inventor 郭祥林张继超王姝李丽娜郭莉
Owner 北京冶科电子器材有限公司
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