Method for manufacturing soft-magnetic alloy powder

A manufacturing method and technology for soft magnetic alloys, applied in the field of precision alloys, can solve the problems of difficulty in ensuring the consistency of powder properties, increased preparation costs, small production scale, etc., so as to reduce the chance of high-temperature oxidation, shorten the heat treatment time, and improve the magnetic properties. Effect

Active Publication Date: 2005-10-05
CENT IRON & STEEL RES INST
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  • Summary
  • 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 and the cost is high. It is difficult to ensure the consistency of the powder properties produced in a large scale.

Method used

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Examples

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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, stand still 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. After the molten steel reaches the pouring temperature, start casting. During casting, the molten steel passes through the The tundish with heating device reaches the cooling roll surface to control the flow rate of the molten steel to maintain the thickness...

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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 Applications(China)
IPC IPC(8): B22F9/04
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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