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Preparation method of sm‑co‑fe‑al‑b amorphous base hard magnetic alloy

A hard magnetic alloy, 1.sm-co-fe-al-b technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problem of not showing hard magnetic or coercive force, and achieve excellent hard magnetic energy, increase the atomic packing density, increase the effect of magnetization

Active Publication Date: 2017-01-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In short, the Sm-Co-Al type amorphous alloys in the prior art, including Sm-Co-Al, Sm-Co-Fe-Al, and Sm-Co-Fe-Al-Cu bulk amorphous alloys, do not show hard magnetism Or the coercive force is very small, it is necessary to develop a new Sm-Co-Al type amorphous base hard magnetic alloy with high coercive force

Method used

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  • Preparation method of sm‑co‑fe‑al‑b amorphous base hard magnetic alloy
  • Preparation method of sm‑co‑fe‑al‑b amorphous base hard magnetic alloy
  • Preparation method of sm‑co‑fe‑al‑b amorphous base hard magnetic alloy

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Embodiment 1

[0036] Sm of Sm-Co-Fe-Al-B amorphous base hard magnetic alloy 15 co 55 Fe 10 Al 15 B 5 The method of making the magnet.

[0037] The first step, raw material preparation:

[0038] According to the element composition formula Sm 15 co 55 Fe 10 Al 15 B 5 The atomic percent composition ratio, weigh the required amount of Sm, Co, Fe, Al and B-Fe alloy containing 19wt% B-81wt% Fe with a purity of ≥ 99.9% by mass to prepare, and add more according to the above The 8wt% Sm of the pure Sm taken by the composition ratio is used as the compensation for the volatilization in the process of smelting and stripping, thus completing the preparation of raw materials;

[0039] The second step is to prepare the master alloy ingot:

[0040] Use the raw material prepared in the first step to melt the master alloy in a vacuum arc melting furnace, and the vacuum degree in the furnace is lower than 5×10 - 2 Pa, make all the metal raw materials completely melted and mixed thoroughly to o...

Embodiment 2

[0045] Sm of Sm-Co-Fe-Al-B amorphous base hard magnetic alloy 15 co 50 Fe 10 Al 20 B 5 The method of making the magnet.

[0046] The first step, raw material preparation:

[0047] According to the element composition formula Sm 15 co 50 Fe 10 al 20 B 5 The atomic percent composition ratio, weigh the required amount of Sm, Co, Fe, Al and B-Fe alloy containing 19wt% B-81wt% Fe with a purity of ≥ 99.9% by mass to prepare, and add more according to the above The 7wt% Sm of the pure Sm taken by the composition ratio is used as the compensation for the volatilization in the process of smelting and stripping, thus completing the preparation of raw materials;

[0048] The second step is to prepare the master alloy ingot:

[0049] Use the raw material prepared in the first step to melt the master alloy in a vacuum induction melting furnace, and the vacuum degree in the furnace is lower than 5×10 - 2 Pa, make all the metal raw materials completely melted and mixed thoroughly ...

Embodiment 3

[0054] Sm of Sm-Co-Fe-Al-B amorphous base hard magnetic alloy 20 co 50 Fe 10 al 13 B 7 The method of making the magnet.

[0055] The first step, raw material preparation:

[0056] According to the element composition formula Sm 20 co 50 Fe 10 al 13 B 7 Atomic percent composition ratio, take the required amount of Sm, Co, Fe, Al and B with a purity of mass percentage ≥ 99.9% for preparation, and add more 5wt% of pure Sm weighed according to the above composition ratio Sm is used as the compensation for the volatilization in the process of smelting and stripping, thus completing the preparation of raw materials;

[0057] The second step is to prepare the master alloy ingot:

[0058] Use the raw material prepared in the first step to melt the master alloy in a vacuum arc melting furnace, and the vacuum degree in the furnace is lower than 5×10 - 2 Pa, make all the metal raw materials completely melted and mixed thoroughly to obtain Sm 20 co 50 Fe 10 al 13 B 7 mas...

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Abstract

The invention discloses a method for preparing Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy, and relates to magnetic materials containing rare-earth metal and magnetic transition metal. The method is for preparing Sm-Co-Fe-Al-B quinary series rapid quenching alloy strips. The method comprises the steps that according to the element composition formula SmxCoyFezAluBv, the atomic percentage of the element component x is 10 to 20, the atomic percentage of the element component y is 50 to 60, the atomic percentage of the element component z is 10 to 15, the atomic percentage of the element component u is 10 to 20, the atomic percentage of the element component v is 5 to 10, and composition proportions meet the formula that x+y+z+u+v=100; and a needed quantity of raw materials are weighed for preparation. The Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy which is of a special cellular structure and obtained through vacuum melting and a melt rapid quenching technology has high coercivity and overcomes the defect that in the prior art, Sm-Co-Al amorphous alloy does not show hard magnetism or has very poor coercivity.

Description

technical field [0001] The technical scheme of the invention relates to a magnetic material containing rare earth metals and magnetic transition metals, specifically a method for preparing a Sm-Co-Fe-Al-B amorphous hard magnetic alloy. Background technique [0002] Amorphous state refers to a state in which atoms in the internal structure of a substance are arranged in a long-range disorder. Since the late 1980s, Inoue (Inoue A., Zhang T., Zhang W., Takeuchi A. Bulk Nd-Fe-Al amorphous alloys with hard magnetic properties [J]. Materials Transactions, JIM, 1996, 37 (2 ):99-108) and Johnson (Johnson W.L., Physics and metallurgy of bulk glassforming alloys, in: The Science Of Alloys For The 21st Century: A Hume-Rothery Symposium Celebration, October 18, 2000-October 20, 2000, Minerals, Metals andMaterials Society, St.Louis, MO, United states, 2000, pp.183-199), Japanese and American researchers, respectively, greatly reduced the critical cooling rate for obtaining an amorphous ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/04C22C1/03B22D11/06H01F1/057
Inventor 孙继兵段秀丽步绍静郭凯崔春翔王美
Owner HEBEI UNIV OF TECH