Soft magnetic thin strip, process for production of the same, magnetic parts, and amorphous thin strip

A manufacturing method and a technology of magnetic components, which are applied in the direction of magnetic materials, magnetic objects, and the magnetism of inorganic materials, can solve the problems of large magnetostriction, characteristic deterioration, and high noise, and achieve the purpose of inhibiting grain growth, reducing hysteresis loss, Effect of Low Core Loss

Inactive Publication Date: 2010-03-03
PROTERIAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in Fe-based amorphous soft magnetic alloys, the saturation magnetic flux density is determined by taking into account the interatomic distance, the coordination number, and the Fe concentration, and 1.65 T is roughly the upper limit physically.
In addition, Fe-based amorphous soft magnetic alloys have the problem of deterioration of characteristics due to stress due to large magnetostriction, and the problem of high noise in applications such as superimposition of current in the audio frequency band.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The alloy melt heated to 1300°C with the composition shown in Table 1 was sprayed onto a Cu-Be alloy roll with an outer diameter of 300mm rotating at a peripheral speed of 30 / s to produce an amorphous ribbon. The fabricated amorphous thin film has a bandwidth of 5 mm and a thickness of about 21 μm. As a result of X-ray diffraction and transmission electron microscope (TEM) observation, less than 1% of crystallites of 30 μm or less were precipitated in the amorphous phase. Both can be bent at 180 degrees and punched with tools such as metal molds.

[0063] The temperature of these amorphous thin strips is raised rapidly, and the average temperature rise rate above 300°C is more than 100°C / min. After being kept at 450°C for 10 minutes, it is rapidly cooled to room temperature. The heating rate at 350°C is about 170°C / min. Table 1 shows the coercive force and maximum magnetic permeability data of the soft magnetic ribbon subjected to this heat treatment. In any composit...

Embodiment 2

[0067] The alloy melt heated to 1300°C with the composition shown in Table 2 was sprayed onto a Cu-Be alloy roll with an outer diameter of 300mm rotating at a peripheral speed of 30 / s to produce an amorphous ribbon. The fabricated amorphous thin film has a bandwidth of 5 mm and a thickness of about 21 μm. As a result of X-ray diffraction and transmission electron microscope (TEM) observation, less than 1% of crystallites of 30 μm or less were precipitated in the amorphous phase. In addition, the amorphous strips can be bent at 180 degrees, and can be punched with tools such as metal molds.

[0068] These veneer-shaped samples were rapidly heated to an average rate of 100°C / min above 300°C, kept at 450°C for 10 minutes, and then rapidly cooled to room temperature. The heating rate at 350°C is about 170°C / min. The data of coercive force and maximum magnetic permeability are recorded in Table 2. In any composition B 8000 All are above 1.7T. In addition, even in an alloy with...

Embodiment 3

[0073] The alloy melt heated to 1300°C with the composition shown in Table 3 was sprayed onto a Cu—Be alloy roll with an outer diameter of 300 mm rotating at a peripheral speed of 30 / s to produce an amorphous ribbon. The fabricated amorphous thin film has a bandwidth of 5 mm and a thickness of about 21 μm. As a result of X-ray diffraction and transmission electron microscope (TEM) observation, less than 1% of crystallites of 30 μm or less were precipitated in the amorphous phase. Both can be bent at 180 degrees, and can be punched with tools such as metal molds.

[0074] These veneer-shaped samples were rapidly heated to an average rate of 100°C / min above 300°C, kept at 450°C for 10 minutes, and then rapidly cooled to room temperature. The heating rate at 350°C is about 170°C / min. Coercivity H C , Saturation magnetic flux density B s (B 8000 value of B s ) data for each alloy is recorded in Table 3. Any composition under B s All are above 1.7T. In addition, even in an...

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Abstract

The invention provides a soft magnetic thin strip which contains nanoscale fine grains and exhibits a high saturation magnetic flux density and excellent soft magnetic characteristics; a process for production of the same; magnetic parts; and an amorphous thin strip to be used in the production. In the invention, an amorphous thin strip is used, which is represented by the composition formula: Fe100-x-y-zAxMyXz-aPa (wherein A is at least one element selected from between Cu and Au; M is at least one element selected from among Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Mn; X is at least one elementselected from between B and Si; and x, y, z and a (in terms of atomic percentage) satisfy the relationships: 0.5<=x<=1.5, 0<=y<=2.5, 10<=z<=23, and 0.35<=a<=10 respectively) and permits 180 DEG bending. The amorphous thin strip can give through heat treatment a soft magnetic thin strip having a structure wherein grains of body-centered cubic structure having an average grain size of 60nm or beloware distributed in an amorphous phase with a grain volume fraction of 30% or above.

Description

technical field [0001] The present invention relates to pulse power magnetic components used in various transformers, reactors, choke coils, noise suppression components, laser power supplies, accelerators, etc., pulse transformers for communication, motor cores, generators, magnetic sensors, antenna magnets, etc. Cores, current sensors, magnetic shields, electromagnetic wave absorbing sheets, yoke materials, etc. contain nanoscale fine grains with high saturation magnetic flux density and exhibit excellent soft magnetic properties, especially those that exhibit excellent AC magnetic properties Soft magnetic thin strip, its manufacturing method and magnetic part. Furthermore, the present invention also relates to an amorphous ribbon used in the production of a soft magnetic ribbon. Background technique [0002] High saturation flux density and excellent AC magnetic properties used in various transformers, reactors, choke coils, noise suppression components, laser power supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00B22D11/06C22C38/00C22C45/02H01F1/153H01F1/16
CPCH01F1/15325C22C38/02H01F1/15308C22C33/003C22C45/02C22C38/16H01F1/15333
Inventor 太田元基吉泽克仁
Owner PROTERIAL LTD
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