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Preparation for block amorphous nanometer crystal double-phase composite soft magnetic alloy

An amorphous nanocrystalline and composite soft magnetic technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of shape and size restrictions, complex shapes, etc., achieve low cost, high saturation magnetic induction, and easy industrialization Effect

Inactive Publication Date: 2005-05-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For special motors, the magnetic circuit is required to have a special spatial distribution, so the magnetic core material is usually a block with a complex shape
However, the currently applied amorphous nanocrystalline soft magnetic alloy is usually obtained by melt quenching + amorphous crystallization process, its shape and size are greatly limited, and only thin strips, powders, filaments, etc. can be provided. Shape, can not meet the needs of engineering applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: bulk amorphous nanocrystalline dual-phase composite Fe 85.4 Zr 3.3 Nb 3.3 B 3 Si 3 Al 1 Cu 1 Soft magnetic alloys and their preparation. The preparation process of the bulk alloy is as described above. During vacuum smelting, the vacuum degree is 6×10 -3 Pa, in the preparation of the amorphous strip, the shielding gas is Ar, the line speed of the copper roll is 50m / s, and the thickness of the obtained amorphous strip is 14 microns, and the width is 20 mm. A planetary low-temperature ball mill was used to crush the amorphous ribbon into amorphous powder with a particle size of about 15 microns. The ball milling temperature was -30°C, the rotation speed was 400 r / min, the ball-to-material ratio was 10, and the ball milling time was 15 hours. The high-pressure sintering temperature is 450°C, the sintering pressure is 5.5GPa, and the sintering time is 3min. The size of the obtained bulk amorphous nanocrystalline dual-phase composite alloy is Φ25×10mm,...

Embodiment 2

[0012] Embodiment 2: Bulk amorphous nanocrystalline dual-phase composite Fe 86 Zr 5 Nb 6 B 3 Soft magnetic alloys and their preparation. The preparation process of the bulk alloy is as described above. During vacuum smelting, the vacuum degree is 6×10 -3 Pa, in the preparation of the amorphous strip, the protective gas is Ar, the line speed of the copper roll is 70m / s, and the thickness of the obtained amorphous strip is 11 microns, and the width is 10 mm. A planetary low-temperature ball mill was used to crush the amorphous ribbon into an amorphous powder with a particle size of about 12 microns. The ball milling temperature was -100°C, the rotation speed was 500r / min, the ball-to-material ratio was 15, and the ball milling time was 20h. The high-pressure sintering temperature is 350°C, the sintering pressure is 3.5GPa, and the sintering time is 5min. The size of the obtained bulk amorphous nanocrystalline dual-phase composite alloy is Φ25×10mm, the relative density is ...

Embodiment 3

[0013] Embodiment 3: Bulk amorphous nanocrystalline dual-phase composite Fe 86 Zr 5.5 Nb 5.5 B 3 Soft magnetic alloys and their preparation. The preparation process of the bulk alloy is as described above. During vacuum smelting, the vacuum degree is 6×10 -3 Pa, in the preparation of the amorphous strip, the shielding gas is Ar, the line speed of the copper roll is 60m / s, and the thickness of the obtained amorphous strip is 10 microns, and the width is 10 mm. A planetary low-temperature ball mill was used to crush the amorphous ribbon into an amorphous powder with a particle size of about 10 microns. The ball milling temperature was -5°C, the rotational speed was 450 r / min, the ball-to-material ratio was 20, and the ball milling time was 10 h. The high-pressure sintering temperature is 480°C, the sintering pressure is 5.5GPa, and the sintering time is 3min. The size of the obtained bulk amorphous nanocrystalline dual-phase composite alloy is Φ25×10mm, the relative densit...

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Abstract

The invention was involved in the preparation method of block amorphous nanocrystalline two-phase composite magnetically soft alloy. The soft magnetic alloy was Fe-Zr-Nb alloy. Firstly, mother alloy was melt in the vacuum medium-frequency induction furnace. Secondly, single-roll quench flailing machine was used to produce amorphous ribbon and the non-metal powder was finished by ball milling under low temperature. Thirdly, during the temperature range of the over-cooling zone, product was finished by high-pressure rapid-sintering process. The characteristics of the invention include simple technology, low cost and easy to realize modernization. All the products with high saturation magnetic induction intensity were used in electric engine magnetic core, load distribution voltage changer and electric source of large power switch.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials. In particular, it relates to a method for preparing bulk amorphous and nanocrystalline dual-phase composite soft magnetic alloys. Background technique [0002] In order to meet the requirements of miniaturization and high performance of motors, it is urgent to develop magnetic core materials with high saturation magnetic induction. For a special motor, the magnetic circuit is required to have a special spatial distribution, so the magnetic core material is usually a block with a complex shape. However, the currently applied amorphous nanocrystalline soft magnetic alloy is usually obtained by melt quenching + amorphous crystallization process, its shape and size are greatly limited, and only thin strips, powders, filaments, etc. can be provided. The shape cannot meet the needs of engineering applications. Contents of the invention [0003] The object of the present invention is to ...

Claims

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Application Information

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IPC IPC(8): B22F3/14C22C33/02C22C45/02H01F1/153
Inventor 严彪陆伟卢斌唐人剑殷俊林
Owner TONGJI UNIV
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