Soft magnetic ribbon, magnetic core, magnetic part and process for producing soft magnetic ribbon

A soft magnetic, thin strip technology, applied in the direction of the magnetic core/yoke, the application of the magnetic film to the substrate, the magnetic layer, etc., to achieve the effect of low magnetic flux density

Active Publication Date: 2012-05-30
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the Fe-based amorphous alloy system, the physical upper limit of the saturation magnetic flux density is about 1.68T
In addition, Fe-based amorphous alloys have problems in that they have large magnetostriction and their properties deteriorate due to stress, and they generate high noise in applications where currents in the audio frequency band are superimposed

Method used

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  • Soft magnetic ribbon, magnetic core, magnetic part and process for producing soft magnetic ribbon
  • Soft magnetic ribbon, magnetic core, magnetic part and process for producing soft magnetic ribbon
  • Soft magnetic ribbon, magnetic core, magnetic part and process for producing soft magnetic ribbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (Example 1) Thin ribbons each having a width of 5 mm and a thickness of about 20 μm and each having a composition shown in Table 1 were prepared by a melt quenching method using a single roll. Alloy thin strips were prepared by spraying molten alloy heated to 1300°C onto a Cu—Be alloy roll with an outer diameter of 300 mm rotating at a peripheral speed of 32 m / s. As a result of X-ray diffraction and transmission electron microscope (TEM) observation, it was found that thin ribbons contained structures dispersed in an amorphous phase at a volume fraction of less than 30%. The ribbon is annealed such that the average temperature ramp rate above 300°C is above about 200°C / min. The ribbon was kept at a holding temperature of 450° C. for 10 minutes, and then allowed to cool to obtain a soft magnetic ribbon of the present invention. In each sample there was: a crystalline layer about 20 nm thick on the top surface of the ribbon, an amorphous layer about 30 nm thick inside th...

Embodiment 2

[0062] (Example 2) The soft magnetic thin strip prepared in Example 1 was used to measure the apparent power. figure 2 The relationship between the apparent power and the magnetic flux density of the soft magnetic ribbon of the present invention is shown. In addition, Table 2 shows the apparent power S measured under the conditions of 50 Hz and 1.55T, 1.60T and 1.65T, respectively, for the alloy composition of the soft magnetic ribbon of the present invention (Examples 1-1 to 1-4) 1.55 / 50 , S 1.60 / 50 and S 1.65 / 50 The data. For comparison, the data for grain-oriented silicon steel sheets are also shown. In a wide region of magnetic flux density of about 1.55T to 1.7T, the apparent power properties of the soft magnetic ribbon of the present invention are better than those of Fe-based amorphous materials and grain-oriented silicon steel sheets. These results combined with the results of Example 1 show that the soft magnetic ribbon of the present invention has particularly e...

Embodiment 3

[0064] (Example 3) The soft magnetic strip prepared in Example 1 was used to measure iron loss at frequencies of 400 Hz and 1 kHz. Table 3 shows the iron loss P at 1.0T and 400Hz, and 0.5T and 1kHz of the soft magnetic strip and grain-oriented silicon steel sheet of the present invention, respectively. 1.0 / 400 and P 0.5 / 1k . The difference in iron loss between the material of the invention and the grain-oriented silicon steel plate increases with frequency, indicating that the material of the invention is suitable for high-frequency applications. also, image 3 The results of the magnetic flux density dependence of the iron loss measured by using the soft magnetic thin strips in Examples 1 to 4 for each frequency are shown.

[0065] name composition (characteristics) Amorphous layer presence or absence P 1.0 / 400 (W / kg) P 0.5 / 1k (W / kg) Example 1-1 Fe bal. Cu 1.4 Si 5 B 13 have 2.6 3.6 Example 1-2 Fe bal. Cu 1.4 Si 4 B...

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Abstract

A soft magnetic ribbon that especially in a relatively low magnetic field region of 500 A / m or less, is high in the squareness of magnetic flux density-magnetization curve. There is disclosed a soft magnetic ribbon of 100 [mu]m or less thickness comprising a parent phase structure in which by volume ratio, 30% or more of crystal grains of 60 nm or less (not including 0) crystal grain diameter are dispersed in an amorphous phase and comprising an amorphous layer disposed on the surface side of the parent phase structure. Preferably, the soft magnetic ribbon is represented by the composition formula Fe100-x-yCuxXy (wherein X is at least one element selected from among B, Si, S, C, P, Al, Ge, Ga and Be), in which the atomic percents (%) satisfy the relationships 0<x=5 and 10=y=24.

Description

technical field [0001] The present invention relates to magnetic components with high saturation magnetic flux density and good squareness for various transformers, laser power supplies, pulse power magnetic components for accelerators, various reactors, interference countermeasures, various motors, various generators, etc. A soft magnetic ribbon, and relates to a magnetic core and a magnetic part using the ribbon, and a method for preparing the soft magnetic ribbon. Background technique [0002] Silicon steel, ferrite, amorphous alloys, Fe-based nanocrystalline alloys, etc. are known as magnetic materials with high saturation magnetic flux density and excellent AC electromagnetic properties, which are used in various transformers, reactors / choke coils, interference suppression Components, laser power supplies, pulse power magnetic components for accelerators, various motors, various generators, etc. [0003] The silicon steel sheet is made of cheap material and has a high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/00C21D6/00C22C45/02H01F1/153H01F3/04H01F10/13H01F41/24
Inventor 太田元基吉泽克仁
Owner HITACHI METALS LTD
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