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Aluminum-nickel-cobalt permanent magnet alloy with low temperature coefficient and preparation method of alloy

A low temperature coefficient, permanent magnetic alloy technology, applied in the field of permanent magnetic alloy, can solve the problem of inapplicable temperature coefficient, achieve excellent grain orientation, expand application, and improve temperature stability

Active Publication Date: 2013-08-28
CENT IRON & STEEL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The magnetic mechanism of AlNiCo permanent magnet materials is not the same as that of rare earth permanent magnet materials, so this method of adding heavy rare earth elements is not suitable for reducing its temperature coefficient. patents and literature

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  • Aluminum-nickel-cobalt permanent magnet alloy with low temperature coefficient and preparation method of alloy
  • Aluminum-nickel-cobalt permanent magnet alloy with low temperature coefficient and preparation method of alloy
  • Aluminum-nickel-cobalt permanent magnet alloy with low temperature coefficient and preparation method of alloy

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[0029] Hereinafter, exemplary embodiments of the present invention will be described in detail. This invention may, however, be embodied in many different forms and should not be limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the exemplary embodiments to those skilled in the art.

[0030] A high-performance alnico permanent magnet alloy with a low temperature coefficient of the present invention, the chemical composition of the alnico permanent magnet alloy includes: Co30%-34%, Ni11.5%-14.5%, Cu2. 4% to 4.5%, Ti4% to 6.2%, Al5.4% to 7.5%, C0.02% to 0.1%, S0.05% to 0.4%, Si0.05% to 0.2%, and the balance is Fe.

[0031] The content of Co in the AlNiCo permanent magnet alloy is not higher than 34%, and the content of Ti is not higher than 6.2%. The AlNiCo permanent magnet alloy is a casting oriented alloy, and its crystal structure i...

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Abstract

The invention belongs to the technical field of preparation of permanent magnet alloy and in particular relates to an aluminum-nickel-cobalt permanent magnet alloy with a low temperature coefficient and a preparation method of the alloy. The aluminum-nickel-cobalt permanent magnet alloy with the low temperature coefficient comprises the following chemical components in percentage by weight: 30%-34% of Co, 11.5%-14.5% of Ni, 2.4%-4.5% of Cu, 4%-6.2% of Ti, 5.4%-7.5% of Al, 0.02%-0.1% of C, 0.05%-0.4% of S, 0.05%-0.2% of Si and the balance being Fe. According to the aluminum-nickel-cobalt permanent magnet alloy disclosed by the invention, the AlNiCO permanent magnet alloy has excellent grain orientation by strictly controlling smelting and casting process conditions and magnetic field thermal treatment conditions. Under the condition that the magnetism does not change much, the absolute value of temperature coefficient of remanence is greatly lowered, wherein the temperature coefficient of remanence alpha is (-)0.4*10<-4> / DEG C to (-)0.6*10<-4> / DEG C at 25 DEG C-120 DEG C, and the temperature coefficient of remanence alpha is (-)0.6*10<-4> / DEG C-0.8*10<-4> / DEG C at 25 DEG C-180 DEG C.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet alloys, in particular to a low temperature coefficient alnico permanent magnet alloy and a preparation method thereof. Background technique [0002] AlNiCo permanent magnet material has the highest Curie temperature (1133K) and very low remanence reversible temperature coefficient (better than -0.02% / ℃) among permanent magnet materials, and its working temperature can reach above 873K, precisely because of its It has very excellent temperature stability and is widely used in some precision magnetic devices (such as gyroscopes and accelerometers in inertial navigation systems, microwave tubes, traveling wave tubes and other high-precision instruments). [0003] At present, most of the patents on low temperature coefficient permanent magnet materials are concentrated on rare earth permanent magnet materials. [0004] For example, the Chinese invention patent, publication number CN1151517C,...

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Application Information

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IPC IPC(8): C22C30/02H01F1/01B22D27/04C22F3/00
Inventor 李卫刘涛郭朝晖朱明刚
Owner CENT IRON & STEEL RES INST
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