Samarium-cobalt-iron-copper-zirconium alloy for magnetic material and preparation method of samarium-cobalt-iron-copper-zirconium alloy

A magnetic material, copper-zirconium alloy technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of large fluctuation of samarium-cobalt-iron-copper-zirconium alloy composition, influence of samarium-cobalt magnet performance consistency, and large difference in properties, etc. , to achieve the effect of low cost and solid waste products, good product market prospects, and stable ingredients

Inactive Publication Date: 2019-10-25
苏州航大新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Its process technology of existing method, preparation samarium cobalt copper zirconium alloy has the following deficiencies: 1. The existing metal samarium preparation technology is to prepare by reducing samarium oxide with rare earth metal, and its technological process is long, and cost is on the high side
2. Metal samarium and cobalt, iron, copper, zirconium and other single metals have large differences in basic physical properties such as melting point, vapor pressure, density, etc., and the composition fluctuation and composition segregation of the smelted alloy are obvious. Large, it has a great influence on the performance consistency of the prepared samarium cobalt magnet
3. Due to the relatively high oxygen content of harmful impurity elements in single metals such as cobalt and zirconium (O>0.2%), the oxygen content in the samarium cobalt iron copper zirconium alloy prepared by this method is relatively high, and the samarium cobalt prepared by this alloy magnets, which have a large negative impact on their performance

Method used

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preparation example Construction

[0021] The preparation technology for preparing samarium-cobalt-iron-zirconium-copper alloy includes the following processes in turn:

[0022] 1. Graphite is used as the electrolytic cell, which doubles as the anode, and the cobalt-iron-zirconium-copper alloy is used as the self-consumable cathode, and an alloy collector is set under the cathode; the collector can be one of alumina and magnesia.

[0023] 2. The electrolyte in the electrolytic cell is composed of samarium fluoride, lithium fluoride, barium fluoride and mixed fluoride. The raw material for electrolysis is samarium oxide, which is dissolved in a molten salt electrolyte composed of samarium fluoride, lithium fluoride, and barium fluoride mixed fluoride, and electrolyzed by direct current to obtain a samarium-cobalt-iron-copper-zirconium alloy.

[0024] 3. The consumable cathode for electrolysis is made of cobalt, iron, copper and zirconium pure metals of corresponding purity in a vacuum intermediate frequency indu...

Embodiment 1

[0027] The preparation of the cobalt-iron-copper-zirconium self-consumable cathode in this embodiment uses pure metals of cobalt, iron, copper, and zirconium with a purity greater than 99.8% as raw materials, and according to the composition ratio of the cobalt-iron-copper-zirconium to be prepared for the self-consumable cathode, in a medium-frequency vacuum Melting is carried out in an induction furnace. During the melting process, argon is used as a protective gas, and the crucible is a magnesia crucible. After the metal is melted, it is kept warm for 5 minutes, and the molten alloy is poured into a cylindrical ingot mold to cast an ingot. The composition of the cobalt-iron-zirconium-copper alloy ingot obtained after smelting is shown in Table 1. The ingot is used as a consumable cathode for the preparation of samarium cobalt iron zirconium copper alloy.

[0028] Table 1 Composition analysis results of cobalt-iron-zirconium-copper alloy (wt%)

[0029] element co...

Embodiment 2

[0034] The preparation method of the cobalt-iron-zirconium-copper consumable cathode in this example is the same as that in Example 1. The preparation of the cobalt-iron-copper-zirconium consumable cathode uses cobalt, iron, copper, and zirconium pure metals with a purity greater than 99.8% as raw materials. According to the composition ratio of the cobalt-iron-copper-zirconium alloy to be prepared for the self-consumable cathode, the composition of the cobalt-iron-copper-zirconium alloy ingot obtained after smelting is shown in Table 3. The ingot is used as a consumable cathode for the preparation of samarium cobalt iron copper zirconium alloy.

[0035] Table 3 Cobalt-iron-zirconium-copper alloy composition analysis results (wt%)

[0036] element co Fe Cu Zr mn Mg Si O C Element 70 19 6 3.9 0.035 0.021 0.025 0.16 0.02

[0037] A circular graphite electrolytic cell of Φ120mm×140 mm is used. The graphite cell doubles as the anode. Th...

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Abstract

The invention discloses a preparation method of a samarium-cobalt-iron-copper-zirconium alloy for a magnetic material. The alloy is prepared from components including 60-95 wt% of samarium, 2-40 wt% of cobalt and the balance iron, copper and zirconium, wherein the percent of Fe is smaller than or equal to 2-40 wt%, the percent of Cu is smaller than or equal to 1-7 wt%, and the percent of Zr is smaller than or equal to 1-6 wt%. The samarium-cobalt-iron-copper-zirconium alloy is prepared with a method of electrolyzing samarium oxide with fluoride molten salt. A cathode for electrolysis is prepared in the manner that pure metal of cobalt, iron, copper and zirconium with corresponding purity is subjected to melting alloying and ingot casting. The samarium-cobalt-iron-copper-zirconium alloy prepared with the method has the beneficial effects that the components are stable and uniform, and the impurity content is low, and is a high-quality novel raw material for preparing the high-performance samarium-cobalt magnetic material.

Description

technical field [0001] The invention relates to a rare earth alloy material, which relates to a samarium-cobalt-iron-copper-zirconium alloy and a preparation method thereof. Background technique [0002] Samarium cobalt magnetic material is a kind of rare earth permanent magnet material with high coercive force, high Curie temperature, good temperature stability and corrosion resistance prepared by powder metallurgy method. It has become an indispensable and important metal functional material in the fields of modern aerospace, national defense and military industry, microwave devices, communications, medical equipment, and motors. The market outlook continues to improve. [0003] With the continuous improvement of the performance and cost performance of samarium cobalt magnetic materials in the field of application and market demand, higher requirements are put forward for its preparation technology and product performance. In order to meet the needs of users, a lot of re...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C22C28/00C25C3/36C25C7/02
CPCC22C28/00C25C3/36C25C7/025
Inventor蒋成保康达庄张天丽张恒刘敬华邱鑫鑫
Owner苏州航大新材料科技有限公司