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Alloy with excellent room-temperature soft magnetic property and mechanical property, and preparation method thereof

A soft magnetic alloy and alloy technology, applied in the direction of magnetic objects, magnetic materials, electrical components, etc., can solve the problem that the soft magnetic properties and mechanical properties of FeCoV-based soft magnetic alloys are not well compatible, so as to facilitate the preparation of larger sizes, Simple preparation process and excellent mechanical properties at room temperature

Inactive Publication Date: 2013-05-22
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the soft magnetic properties and mechanical properties of the existing FeCoV-based soft magnetic alloys are not well compatible, the present invention provides a FeCoVCr alloy and a preparation method thereof

Method used

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  • Alloy with excellent room-temperature soft magnetic property and mechanical property, and preparation method thereof
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  • Alloy with excellent room-temperature soft magnetic property and mechanical property, and preparation method thereof

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preparation example Construction

[0028] The present invention also provides a kind of preparation method of described FeCoVCr soft magnetic alloy, concrete steps are:

[0029] The first step is to select raw materials for proportioning melting, and the melting method is vacuum electric arc furnace melting and argon protection. The raw material ratio is Fe-49Co-2V-xCr, 0<x≤1.0, and the above are atomic percentages.

[0030] The second step is to carry out vacuum diffusion annealing on the smelted alloy, the temperature is ≥900°C, the annealing time is 2-10 hours, and the molten ingot is cooled with the furnace.

[0031] The third step is high-temperature forging, which can eliminate defects such as looseness of the alloy during the smelting process and optimize the microstructure. High temperature forging temperature ≥ 800 ℃.

[0032] In the fourth step, the block material obtained after the high-temperature forging in the third step is subjected to hot rolling for more than three consecutive passes, and the...

Embodiment 1

[0037] Adopt preparation method provided by the invention to prepare Fe-49Co-2V-0.5Cr alloy, concrete steps are as follows:

[0038] The first step is the ratio of raw materials and smelting.

[0039] Take Fe with a purity of 99.99% and Co, V, and Cr with a purity of 99.9% according to the atomic percentage of Fe-49Co-2V-0.5Cr, and conduct arc melting under argon protection. To ensure homogenization, the raw material was remelted 5 times with negligible mass loss.

[0040] The second step is annealing.

[0041] After diffusion annealing at a temperature of 1200°C for 4 hours in vacuum, the alloy was cooled with the furnace.

[0042] The third step is high temperature forging.

[0043] The annealed molten ingot is forged, the forging temperature is 1150° C., and the thickness of the alloy block after forging is 6 mm.

[0044] The fourth step is hot rolling.

[0045] After the block material in the third step is kept at 1000° C. for 1 hour, it is hot-rolled to a thickness of ...

Embodiment 2

[0057] Adopting the method provided by the present invention to prepare Fe-49Co-2V-0.3Cr soft magnetic alloy material, the specific process steps are as follows:

[0058] Fe with a purity of 99.99% and Co, V, and Cr with a purity of 99.9% are proportioned according to the atomic percentage of Fe-49Co-2V-0.3Cr, and are arc smelted under argon protection. To ensure homogenization, the raw material was remelted 5 times with negligible mass loss. Next, after diffusion annealing in vacuum at 1200°C for 4h, the alloy is cooled with the furnace. After that, the molten ingot was forged, the forging temperature was 1150° C., and the thickness after forging was 10 mm. After that, heat-retain at 1000° C. for 1 hour and then hot-roll to 3 mm. After that, cold rolling processing with a deformation amount of 30% was performed. The cold-rolled alloy sheet was subjected to vacuum final heat treatment at different temperatures for 2 hours. The final heat treatment temperatures were 550°C, 6...

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Abstract

The invention discloses alloy with excellent room-temperature soft magnetic property and mechanical property, and a preparation method thereof, and belongs to the technical field of soft magnetic alloy, wherein the alloy is Fe-49Co-2V-xCr, wherein x is smaller than or equal to 1.0 and greater than 0, and is atomic percent; preferably x is smaller than 0.5 and greater than 0; the preparation method comprises the steps of smelting, vacuum diffusing and annealing, high-temperature forging, hot rolling, cold rolling and final heat treatment. The FeCoVCr alloy provided by the invention is excellent in room-temperature mechanical property; the tensile strength can be up to 912MPa; the elongation can be up to 10.9%; the alloy has soft magnetic property; and the coercivity does not exceed 3.58Oe. The alloy is simple in preparation technology, and a large-sized alloy material can be prepared conveniently.

Description

technical field [0001] The invention relates to the technical field of soft magnetic alloys, in particular to a (crystalline) soft magnetic alloy with high saturation magnetic induction, low coercive force, high strength at room temperature and good plasticity and its preparation technology. Background technique [0002] Soft magnetic materials constitute a very important branch of engineering materials because they can be easily magnetized under the condition of applying a weak magnetic field. Generally, soft magnetic alloys are characterized by high initial magnetization and low coercivity. Their magnetic properties are what determine their applications, including power generation, power distribution, solenoids, magnetic shielding, data storage, and microwave communications. Among the soft magnetic materials, the electronic sheet has a relatively leading market share. FeCo-based soft magnetic alloy has become an ideal material for high magnetic flux density products due ...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02C22F1/00H01F1/147
Inventor 毕晓昉单亦姣侯崇强陈慈航
Owner BEIHANG UNIV
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