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Deformable permanent magnet alloy, deformable permanent magnet alloy thin strip and preparation method thereof

A permanent magnet alloy, thin strip technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of unfavorable practical application of materials, insufficient coercivity, easy surface oxidation, etc., to achieve easy realization, coercivity Large and smooth effect

Active Publication Date: 2017-08-29
山东麦格智芯机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the 1980s, China began to study copper-nickel-iron permanent magnet alloys. Its basic magnetic properties are: Br=0.4~0.6T, Hc=3.2~6.4kA / m, and its coercive force is very low, so it cannot be applied.
Later, after increasing the Cu content to about 80%, the coercive force can be increased to more than 500Oe, but the coercive force is still not high enough, and the surface of the material is easy to oxidize after a period of time, which is extremely unfavorable for the practical application of the material

Method used

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  • Deformable permanent magnet alloy, deformable permanent magnet alloy thin strip and preparation method thereof
  • Deformable permanent magnet alloy, deformable permanent magnet alloy thin strip and preparation method thereof
  • Deformable permanent magnet alloy, deformable permanent magnet alloy thin strip and preparation method thereof

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Embodiment 1

[0023] This embodiment provides a method for preparing a deformable permanent magnetic alloy thin strip, and the deformable permanent magnetic alloy thin strip prepared by the preparation method. Described preparation method comprises the steps:

[0024] Step S1, weighing each alloy composition according to the following proportions:

[0025]

[0026] In the prior art, copper-nickel-iron alloy is a common permanent magnetic alloy. In this embodiment, a small amount of Cr is added on the basis of the above-mentioned components, and various components are adjusted accordingly. The addition of Cr, on the one hand, can effectively increase the oxidation resistance of the alloy, and at the same time increase the coercive force of the permanent magnet alloy to a certain extent.

[0027] In step S2, vacuum induction melting is performed on the above-mentioned weighted metal components, and cast into a copper-nickel-iron-chromium alloy ingot.

[0028] The purpose of vacuum induct...

Embodiment 2

[0036] This embodiment provides a deformable permanent magnetic alloy thin strip prepared by the method of Embodiment 1, and describes the preparation process in detail. According to the material composition Cu 65%, Ni 20%, Fe 10%, Cr 5%. Cast into a copper-nickel-iron-chromium alloy ingot by vacuum induction melting. The alloy ingot was forged by extrusion cold forging. Then hot rolling is carried out at 600°C to make a 0.1mm alloy thin strip. Finally, it was tempered at 500° C. for 0.5 hour to obtain sample No. 1 of the prepared permanent magnetic alloy thin strip.

[0037] According to the magnetic test, the coercive force of the prepared alloy thin strip No. 1 is as high as 680Oe, and it still maintains a metallic luster without being oxidized after being placed in the air for one year.

Embodiment 3

[0039] This embodiment also provides a thin strip of deformable permanent magnetic alloy prepared by the method of Embodiment 1, and describes the preparation process in detail. According to the material composition Cu 68%, Ni 19%, Fe 8%, Cr 5%. Cast into a copper-nickel-iron-chromium alloy ingot by vacuum induction melting. The alloy ingot was forged at 950°C. Then it was hot rolled at 900°C to form a 0.2mm alloy thin strip. Finally, it was tempered at 600° C. for 1 hour to obtain sample No. 2 of the prepared permanent magnetic alloy thin strip.

[0040] According to the magnetic test, the coercive force of the prepared alloy thin strip No. 2 is as high as 720Oe, and it still maintains a metallic luster without being oxidized after being placed in the air for one year.

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Abstract

The invention provides deformable permanent magnet alloy, a deformable permanent magnet alloy thin strip and a preparation method thereof. The deformable permanent magnet alloy comprises the following components in percentage by weight: 65-75 percent of Cu, 15-20 percent of Ni, 7-10 percent of Fe and 1-5 percent of Cr. The preparation method of the deformable permanent magnet alloy thin strip comprises the following steps: weighing the alloy components according to the weight ratio, performing vacuum induction melting on raw materials and casting into a copper-nickel-iron-chromium alloy ingot; forging the alloy ingot; hot-rolling the cast alloy ingot at a temperature of 600-900 DEG C and preparing into the alloy thin strip of 0.1-0.3 mm; tempering the alloy thin strip for 0.5-2 hours at a temperature of 500-650 DEG C. Through the design of the alloy components, a small quantity of Cr is added, so that the oxidation resistance of a permanent magnet material is increased, and meanwhile, the coercive force is increased to a certain degree; the thin strip is prepared through the forging, hot-rolling and tempering processes, so that the processes are simplified, the implantation is easy, and the preparation cost is low.

Description

technical field [0001] The invention belongs to the field of magnetic materials and preparation, in particular to a deformable permanent magnet alloy and a preparation method thereof. Background technique [0002] Permanent magnet alloy is a kind of magnetic alloy that can still retain high remanence when the external magnetic field is removed after being magnetized. It not only has high hardness and mechanical properties, but also has strong anti-demagnetization ability, high Coercive force is usually used in electromechanical equipment such as permanent magnet motors, acoustic wave transducers, magnetic machinery, microwave devices, sensors and electrical signal converters, medical electronic instruments and bioengineering such as nuclear magnetic resonance imaging devices, etc. aspect. [0003] The treatment of permanent magnetic alloys usually includes deformation processing, heat treatment, casting and so on. Copper-nickel-iron permanent magnet alloy is a kind of defo...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22F1/08H01F1/047
CPCC22C9/06C22F1/08H01F1/047
Inventor 于泠然
Owner 山东麦格智芯机电科技有限公司
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