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Method for manufacturing soft-magnetic alloy powder

A manufacturing method and technology of soft magnetic alloys, which are applied to magnetic materials, magnetic objects, and the magnetism of inorganic materials, can solve problems such as difficulty in ensuring the consistency of powder properties in large-scale manufacturing, increased preparation costs, and small production scales. Opportunity for high-temperature oxidation, shortening of heat treatment time, and effects of improving magnetic properties

Active Publication Date: 2008-11-12
CENT IRON & STEEL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to the need for high-temperature crystallization treatment to increase the preparation cost, the production scale is also limited by the rapid quenching amorphous strip preparation process, the production scale is small, the cost is high, and it is difficult to ensure the consistency of powder properties in large-scale production

Method used

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  • Method for manufacturing soft-magnetic alloy powder
  • Method for manufacturing soft-magnetic alloy powder
  • Method for manufacturing soft-magnetic alloy powder

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Embodiment Construction

[0030] Using the manufacturing method of the present invention, three batches of soft magnetic alloy powders were produced. The alloy grades and chemical compositions of the three batches of soft magnetic alloy powders are shown in Table 1. The batching is carried out according to its chemical composition, and then the batching is put into the melting furnace for melting. The type of melting furnace and the melting atmosphere selected are shown in Table 2. After the alloy is melted, let it stand for 3 minutes, and then send electricity to the melting furnace to heat the molten steel. At the same time, adjust the speed of the cooling roll according to the linear speed of the cooling roll surface set by the process conditions. Through the tundish with heating device to reach the surface of the cooling roll, the flow rate of molten steel is controlled to maintain the thickness of the rapidly solidified crystalline flake alloy and the cooling strength of the molten steel. The molte...

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Abstract

The production method of soft magnetic alloy powder includes the following steps: smelting soft magnetic mother alloy, making molten metal be quickly coagulated into crystalline sheet alloy, breaking the sheet alloy to obtain alloy powder, and making the alloy powder undergo the processes of activation, annealing treatment and passivation treatment. Said soft magnetic alloy powder is low in oxygen content, stable in property and good in magnetic powder core performance.

Description

technical field [0001] The invention belongs to the field of precision alloys and relates to a method for manufacturing soft magnetic alloy powder. Background technique [0002] Soft magnetic alloy powder is the key material of inductance filter, frequency modulation choke coil and switching power supply core in communication, radar, television, power supply and other technologies. The performance and manufacturing cost of magnetic powder directly affect the performance and cost of electronic equipment. Therefore, the magnetic powder preparation process with stable performance, low manufacturing cost, low coercive force, high magnetic permeability and high quality factor is the key to the application of magnetic powder. [0003] The manufacturing methods of existing soft magnetic alloy powder are generally molten alloy ingot crushing method, molten alloy atomization method, molten alloy rapid quenching amorphous strip crystallization powder making method, etc. Some of these ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08H01F1/147H01F1/16B22F9/04
Inventor 张洪平赵栋梁王新林刘刚赵中伟全白云张羊换祁炎
Owner CENT IRON & STEEL RES INST
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