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Soft magnetic powder, powder magnetic core, magnetic component and method for producing powder magnetic core

A technology of a powder magnetic core and a manufacturing method, which is applied in the directions of magnetic core/yoke, transformer/inductor magnetic core, transformer/inductor components, etc., can solve the problems of complicated process, poor formability, and difficulty in making spherical powder. , to achieve the effect of high cooling performance and excellent mass production

Active Publication Date: 2020-03-10
TOKIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, when the soft magnetic powder is produced from the thin strip of the soft magnetic alloy of Patent Document 1, there are problems in that a pulverization process is required, the process becomes complicated, and it is difficult to produce spherical powder, resulting in poor formability.

Method used

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  • Soft magnetic powder, powder magnetic core, magnetic component and method for producing powder magnetic core
  • Soft magnetic powder, powder magnetic core, magnetic component and method for producing powder magnetic core
  • Soft magnetic powder, powder magnetic core, magnetic component and method for producing powder magnetic core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12 and comparative example 1～8

[0074] As raw materials for the soft magnetic powders of Examples 1 to 12 and Comparative Examples 1 to 8 described in Table 1 below, industrial pure iron, ferrosilicon, ferrous iron, ferroboron, and electrolytic copper were prepared. The raw materials were weighed so as to have the alloy compositions of Examples 1 to 12 and Comparative Examples 1 to 8 described in Table 1, and were melted by high-frequency melting in an argon atmosphere to prepare alloy melts. Next, after gas atomizing the produced alloy melt, it was quenched with cooling water to produce soft magnetic powder with an average particle diameter of 50 μm. The appearance of the state of the rust generated on the surface of the produced soft magnetic powder was observed. The precipitation phase of the produced soft magnetic powder was evaluated by X-ray diffraction (XRD: X-ray diffraction), and the ratio of the amorphous phase was calculated. In addition, the produced soft magnetic powder was heat-treated at the h...

Embodiment 13～25 and comparative example 9、10

[0089] As raw materials for the soft magnetic powders of Examples 13 to 25 and Comparative Examples 9 and 10 described in Table 3 below, industrial pure iron, ferrosilicon, ferrous iron, ferroboron, and electrolytic copper were prepared. The raw materials were weighed so as to have the alloy compositions of Examples 13 to 25 and Comparative Examples 9 and 10 described in Table 3, and were melted by high-frequency melting in an argon atmosphere to prepare alloy melts. Next, after gas atomizing the produced alloy melt, it was quenched with cooling water to produce soft magnetic powder with an average particle diameter of 50 μm. The appearance of the state of the rust generated on the surface of the produced soft magnetic powder was observed. The precipitation phase of the produced soft magnetic powder was evaluated by X-ray diffraction (XRD: X-ray diffraction), and the ratio of the amorphous phase was calculated. In addition, the produced soft magnetic powder was heat-treated at...

Embodiment 26～36

[0100] As raw materials for the soft magnetic powders of Examples 26 to 36 described in Table 5 below, industrial pure iron, ferrosilicon, ferrous iron, ferroboron, electrolytic copper, ferrochromium, carbon iron, niobium, molybdenum, Co, Ni, tin, zinc, Mn. The raw materials were weighed so as to have the alloy compositions of Examples 26 to 36 described in Table 5, and were melted by high-frequency melting in an argon atmosphere to prepare alloy melts. Next, after gas atomizing the produced alloy melt, it was quenched with cooling water to produce soft magnetic powder with an average particle diameter of 50 μm. The appearance of the rust generated on the surface of the produced soft magnetic powder was observed. The precipitation phase of the produced soft magnetic powder was evaluated by X-ray diffraction (XRD: X-ray diffraction), and the ratio of the amorphous phase was calculated. In addition, the produced soft magnetic powder was heat-treated at the heat treatment temper...

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Abstract

The present invention provides a kind of soft magnetic powder, except unavoidable impurity, is composed of Fe a Si b B c P d Cr e m r express. In the above composition formula, M is one or more elements selected from V, Mn, Co, Ni, Cu, Zn, 0at%≤b≤6at%, 4at%≤c≤10at%, 5at%≤d ≤12at%, 0at%<e, 0.4at%≤f<6at%, and a+b+c+d+e+f=100at%.

Description

Technical field [0001] The present invention relates to soft magnetic powder suitable for use in magnetic parts such as powder magnetic cores. Background technique [0002] Patent Document 1 discloses a soft magnetic alloy composed of Fe, Si, B, and Cu. The soft magnetic alloy of Patent Document 1 is produced into a thin ribbon by quenching an alloy melt having a predetermined element composition by a roll quenching method. In addition, Patent Document 2 discloses a soft magnetic powder. As Example 5, its elemental composition is in Fe bal Si 10 B 11 P 5 Cr 0.5 It contains 0.09% by mass of Cu. In the manufacturing process of the soft magnetic powder of Patent Document 2, the water atomization method is adopted as the quenching method. [0003] Prior art literature [0004] Patent literature [0005] Patent Document 1: Japanese Patent Application Publication No. 2011-149045; [0006] Patent Document 2: Japanese Patent Application Laid-Open No. 2009-174034. Summary of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/24C21D6/00C22C38/00C22C45/02H01F1/153H01F27/24H01F41/02B22F1/05B22F1/08B22F1/10
CPCC22C38/02C22C38/28C22C38/60H01F3/08H01F27/2847H01F27/2852H01F27/292H01F41/0246C22C38/20H01F27/255C22C38/32H01F1/15308H01F1/15333B22F5/106C22C2202/02B22F3/10B22F3/02C22C33/0264B22F9/082B22F9/002B22F2999/00B22F1/05B22F1/07B22F1/10B22F3/00B22F1/09B22F1/08C22C38/18H01F1/153H01F27/24H01F1/14733C22C2200/04C22C38/34C22C45/02B22F3/24
Inventor 浦田显理千叶美帆
Owner TOKIN CORP
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