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Iron cobalt-based low temperature coefficient permanent magnet material

A low temperature coefficient, permanent magnet material technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve problems such as unfavorable improvement of the magnetic energy product of the magnet, and achieve the effect of excellent temperature stability

Active Publication Date: 2017-05-31
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology can improve the mechanical properties of SmCo magnets, it is not conducive to improving the magnetic energy product of the magnets.

Method used

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  • Iron cobalt-based low temperature coefficient permanent magnet material
  • Iron cobalt-based low temperature coefficient permanent magnet material
  • Iron cobalt-based low temperature coefficient permanent magnet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The concrete embodiment of iron-cobalt base low temperature coefficient permanent magnet material described in the present invention is described as follows:

[0017] Table 1 has listed the chemical composition of iron-cobalt base low temperature coefficient permanent magnet material embodiment

[0018]

[0019] The content of oxygen is not listed in the ingredient list, but in the examples, the oxygen content is effectively controlled according to the process requirements, and the control ratio is 100-3000ppm.

[0020] In the embodiment, elements such as Tb, Nb, and Cr are not listed, but this does not affect the use and effect of these elements in the present invention.

[0021] Table 2 has listed the typical magnetic properties of iron-cobalt base low temperature coefficient permanent magnet material embodiment

[0022]

[0023] The composition of the iron-cobalt-based permanent magnet materials in Examples 1 to 5 has a temperature coefficient of remanence (0-...

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Abstract

The invention discloses an iron cobalt-based low temperature coefficient permanent magnet material, and belongs to the technical field of permanent magnet materials. The iron cobalt-based low temperature coefficient permanent magnet material is prepared from, by weight, 5-38 parts of Co, 0.9-1.2 parts of B, 10-32 parts of LRE, 0-22 parts of HRE, 0-1 part of Al, 0-0.8 part of Cu, 0-0.8 part of SM, 0.01-0.3 part of O, and the balance Fe. The iron cobalt-based low temperature coefficient permanent magnet material has the advantages that the obtained permanent magnet material presents high indoor temperature comprehensive magnetic performance, has a low residual magnetism temperature coefficient and a coercive force temperature coefficient at the same time, and shows excellent corrosion resistant performance.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet materials, and in particular provides an iron-cobalt-based permanent magnet material with low temperature coefficient, which is suitable for the field of permanent magnet materials requiring both high magnetic performance and good temperature stability. Background technique [0002] Rare earth permanent magnet materials have the performance advantages of high magnetic energy product and high coercive force, and have been widely used in various fields of the national economy. Among them, the maximum magnetic energy product of NdFeB rare earth permanent magnet materials can reach more than 54MGOe, and it is a well-deserved magnet king. However, its Curie temperature is relatively low, generally not exceeding 360°C, its temperature stability is relatively poor (the remanence temperature coefficient is between -0.09~-0.12% / °C), and it is easy to oxidize and corrode. Although the samarium cob...

Claims

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Application Information

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IPC IPC(8): H01F1/055C22C38/10C22C38/16C22C38/32C22C38/06C22C38/14C22C30/02
CPCC22C30/02C22C38/002C22C38/005C22C38/06C22C38/10C22C38/14C22C38/16C22C38/32H01F1/055
Inventor 董生智李卫韩瑞陈红升魏中华张晓伟何响俊
Owner CENT IRON & STEEL RES INST
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