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Magnetic hardening FeGa alloy and preparation method thereof

A technology of alloy and magnetic field strength, applied in the manufacture/assembly of magnetostrictive devices, material selection for magnetostrictive devices, device material selection, etc., can solve the problems of high temperature failure, high demagnetization rate, closing and opening current Higher problems, to achieve low demagnetization rate, improve reliability, and reduce the effect of opening and closing current

Active Publication Date: 2014-05-21
张国成 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanism using NdFeB alloy as the permanent magnet has problems such as high closing and opening current, easy failure at high temperature, and high demagnetization rate.

Method used

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  • Magnetic hardening FeGa alloy and preparation method thereof
  • Magnetic hardening FeGa alloy and preparation method thereof
  • Magnetic hardening FeGa alloy and preparation method thereof

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preparation example Construction

[0037]Under the prior art, different heat treatment methods for iron-based alloys can form different types of magnetic hardening alloys such as quenched steel type, α / γ phase transformation type, metastable phase decomposition type and precipitation type. The inventors of the present invention have found that micro-alloying and directional casting to prepare oriented FeGa alloys, and finally magnetizing with superconducting strong magnets is another new way of magnetic hardening of FeGa alloys. Directional casting can obtain unidirectionally grown crystals whose growth direction is consistent with the principal stress direction, eliminate transverse grain boundaries, improve the unidirectional mechanical strength of the alloy, and more importantly, lay a solid foundation for subsequent magnetization and magnetic retention. Base. Concrete preparation method comprises the following steps:

[0038] (1) Smelting and casting: First weigh Ga, C, Mn and Fe and other raw materials an...

Embodiment 1

[0043] Raw materials such as Fe, Ga, Mn, C with a purity greater than 99.9% are weighed with an electronic balance, according to the mass percentage Ga: 1.00wt%, C: 0.46wt%, Mn: 0.68wt%, and the Fe balance is weighed and placed into the water-cooled copper crucible in the vacuum induction furnace, and adjust the vacuum degree of the vacuum chamber to 4×10 -3 Pa, introduce high-purity argon as a protective gas, adjust the heating power to completely melt the raw materials, then rapidly solidify them into alloy ingots in a water-cooled copper crucible, and then turn over the alloy ingots for melting. The composition is uniform, and then cast into a mold with a water-cooled copper bottom for directional casting into a FeGa alloy billet.

[0044] Put the FeGa alloy billet into the vacuum heat treatment furnace, and adjust the vacuum degree of the vacuum chamber to (2~4)×10 -3 Pa, and then pass inert gas such as argon as protective gas, the pressure is 5×10 4 Pa, in a protective ...

Embodiment 2

[0049] Firstly weigh Fe, Ga, Mn, C and other raw materials with a purity greater than 99.9% with an electronic balance, according to the mass percentage Ga: 10.00wt%, C: 0.45wt%, Mn: 0.72wt%, after weighing the Fe balance Put it into a water-cooled copper crucible in a vacuum induction furnace, and adjust the vacuum degree of the vacuum chamber to 3×10 -3 Pa, and then pass inert gas such as high-purity argon as a protective gas, adjust the heating power to completely melt the raw material, then make it quickly solidify into an alloy ingot in a water-cooled copper crucible, and then turn over the alloy ingot for melting, so repeatedly smelting for 4 Make the composition of the alloy uniform for the first time, and then cast it into a mold with a water-cooled copper bottom to form a FeGa alloy billet.

[0050] Put the FeGa alloy billet into the vacuum heat treatment furnace, and adjust the vacuum degree of the vacuum chamber to (2~4)×10 -3 Pa, and then pass inert gas such as ar...

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Abstract

The invention relates to a magnetic hardening FeGa alloy and a preparation method thereof. The alloy comprises the following components and elements in percentage by mass: 0.1-22.65wt% of Ga, 0.40-0.50wt% of C, 0.50-1.0wt% of Mn and the balance of Fe. The preparation method comprises the following steps: (1) smelting and casting, namely, performing vacuum induction melting on the raw materials Ga, C, Mn and Fe, and directly casting the raw materials into a FeGa alloy blank; (2) annealing, namely, raising the temperature of the FeGa alloy blank in the speed of 80-90 DEG C / hour in a vacuum thermal treatment furnace to be 1050-1100 DEG C, keeping the temperature for 8-10 hours, cooling down along with the furnace till be 300 DEG C, and discharging the FeGa alloy blank outside the furnace; (3) performing superconductive magnetizing, namely, repeatedly magnetizing the annealed FeGa alloy blank in a superconductive permanent magnet. The alloy disclosed by the invention simultaneously has the magnetostrictive characteristics and rectangular magnetic properties, and is applicable to magnetic operation mechanisms of high-voltage circuit breakers.

Description

technical field [0001] The present invention relates to a magnetically hardened FeGa alloy and a preparation method thereof, more specifically, relates to a FeGa alloy having both magnetostrictive properties and moment magnetic properties and a preparation method capable of producing the alloy. This technology can be applied to electric power Magnetic operating mechanism for equipment high voltage circuit breakers. Background technique [0002] Permanent magnet materials are an important class of functional materials. Simply put, permanent magnet materials are materials that can maintain constant magnetic properties once magnetized. At present, there are four types of permanent magnet materials widely used in industry and modern science and technology: (1) cast Al-Ni series and Al-Ni-Co series permanent magnet materials, referred to as cast permanent magnet materials; (2) ferrite permanent magnet materials Magnetic materials; (3) rare earth permanent magnet materials; (4) o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C33/04H01L41/20H01L41/47H10N35/01H10N35/85
Inventor 张国成张兆先
Owner 张国成
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