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A rhenium-containing high remanence high coercive force material and its preparation method

A high-coercivity, high-remanence technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of inability to guarantee the refinement of the as-cast microstructure, low remanence, and low coercivity, etc. The effect of industrialized production, good performance and low production cost

Inactive Publication Date: 2015-11-18
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The permanent magnet obtained by the above invention has a coercive force of 12.8-29.3kOe and a remanent magnetism of 11.41-14.5kGS. The coercive force and remanent magnetism are relatively low, and the casting method adopted at the same time cannot guarantee the refinement of the as-cast structure of the material

Method used

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  • A rhenium-containing high remanence high coercive force material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the rhenium-containing high remanence high coercive force material of the present invention, the specific steps are as follows:

[0026] (1) According to the above weight percentages, Pr3%, Nd21%, Ni0.5%, Al0.5%, B1%, Si0.5%, Tm1%, Pb0.4%, Re0.4%, and the rest are Fe. Ingredients; wherein the purity of Pr, Nd, Ni, Al, B, Si, Tm, Pb, Re and Fe is greater than 99.9%;

[0027] (2) Melting the raw materials in a vacuum induction furnace at a melting temperature of 1510°C and standing for 2 minutes to obtain a master alloy liquid;

[0028] (3) Cast the master alloy liquid onto the roller below the taphole of the induction furnace. The master alloy liquid meets the rotating roller and is dragged by the rim of the roller to form a casting belt; the diameter of the roller is 600cm, and the roller The rotational speed of the rim is 18m / s, the thickness of the casting belt is about 50μm, and the width is about 10mm;

[0029] (4) Cool the cast strip nat...

Embodiment 2

[0034] The preparation method of the rhenium-containing high remanence high coercive force material of the present invention, the specific steps are as follows:

[0035] (1) According to the above weight percentages, Pr6%, Nd24%, Ni1%, Al1%, B3%, Si1%, Tm3%, Pb0.6%, Re0.6%, and the rest are Fe for batching; among them, Pr and Nd , Ni, Al, B, Si, Tm, Pb, Re and Fe have a purity greater than 99.9%;

[0036] (2) Melting the raw materials in a vacuum induction furnace at a melting temperature of 1520°C and standing for 3 minutes to obtain a master alloy liquid;

[0037] (3) Cast the master alloy liquid onto the roller below the taphole of the induction furnace. The master alloy liquid meets the rotating roller and is dragged by the rim of the roller to form a casting belt. The diameter of the roller is 600cm. The rotational speed of the rim is 19m / s; the thickness of the casting belt is about 80μm, and the width is about 20mm;

[0038] (4) Cool the cast strip naturally for 8 min...

Embodiment 3

[0043] The preparation method of the rhenium-containing high remanence high coercive force material of the present invention, the specific steps are as follows:

[0044] (1) According to the above weight percentages, Pr4%, Nd23%, Ni0.7%, Al0.8%, B2%, Si0.9%, Tm2%, Pb0.5%, Re0.5%, and the rest are Fe. Ingredients; wherein the purity of Pr, Nd, Ni, Al, B, Si, Tm, Pb, Re and Fe is greater than 99.9%;

[0045] (2) Melting the raw materials in a vacuum induction furnace at a melting temperature of 1530°C and standing for 4 minutes to obtain a master alloy liquid;

[0046](3) Cast the master alloy liquid onto the roller below the taphole of the induction furnace. The master alloy liquid meets the rotating roller and is dragged by the rim of the roller to form a casting belt. The diameter of the roller is 600cm. The rotational speed of the rim is 20m / s; the thickness of the casting belt is about 100μm, and the width is about 30mm;

[0047] (4) Cool the cast strip naturally for 10 m...

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Abstract

The invention belongs to the field of metal materials and particularly relates to a high residual magnetism and high coercive force material containing rhenium and a preparation method thereof. The material has high coercive force and high residual magnetism. The preparation method is simple in technology, low in production cost and suitable for industrial production. The material comprises, by weight, 3-6% of Pr, 21-24% of Nd, 0.5-1% of Ni, 0.5-1% of Al, 1-3% of B, 0.5-1% of Si, 1-3% of Tm, 0.4-0.6% of Pb, 0.4-0.6% of Re and the balance Fe.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a rhenium-containing high remanence high coercivity material and a preparation method thereof. Background technique [0002] Application No. CN201310160446.6 discloses a double-alloy NdFeB rare earth permanent magnet material and its manufacturing method. The Al alloy composed of heavy rare earth Dy, Tb, Ho and Gd and the light rare earth La, Ce, Pr and Nd are smelted respectively. A2 alloy, and according to the ratio of A1 / A2=0-0.5, under the protection of nitrogen, use a two-dimensional or three-dimensional mixer for mixing; after mixing, make powder in the jet mill, and further collect the fine powder, and The powder and fine powder are added to the two-dimensional or three-dimensional mixer for mixing under the protection of nitrogen gas. After mixing, the magnetic powder is sent to the magnetic field press under the protection of nitrogen gas for molding. After sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057C22C38/60
Inventor 张群王玲赵浩峰邱奕婷陆阳平徐小雪王冰柯维雄赵佳玉何晓蕾宋超赵圣哲李凯希储昭卫谢艳春邹一杰
Owner NANJING UNIV OF INFORMATION SCI & TECH
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