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Preparing method for ball-like metal magnetically soft alloy powder

A metal soft magnetic and alloy powder technology, which is applied in metal processing equipment, magnetic materials, magnetic objects, etc., can solve the problems of large fluctuations in the composition of alloy powder, difficult control of particle shape, and easy puncture of the insulating coating. Achieve the effects of uniform composition without segregation, simplified mechanical crushing process, good insulation coating uniformity and formability

Active Publication Date: 2016-06-29
有研增材技术有限公司
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Problems solved by technology

However, the production efficiency of the gas atomization method is low, the cost is high, and the scope of application is limited; the mechanical crushing method adopts alloy melting, ingot casting and crushing processes to prepare powder, which is simple in process and low in production cost.
However, the composition of the alloy powder fluctuates greatly, the segregation phenomenon of the alloy ingot is serious, the prepared powder has a high oxygen content, and the particle shape is difficult to control and has obvious sharp corners. The sharp corners are easy to pierce the insulating coating during the powder core, which increases the loss of the powder core

Method used

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preparation example Construction

[0029] The spherical-like metal soft magnetic alloy powder of the present invention and its preparation method comprise the following steps:

[0030] (1) The raw materials are weighed and proportioned according to the weight ratio. The alloy components are FeSi6.5, FeSi9.5Al5.5, FeNi50 and FeNi81Mo2: the raw materials are industrial pure iron, polysilicon, refined aluminum, electrolytic nickel and metal molybdenum, and the carbon is controlled , sulfur content in 0.005wt%-0.01wt%;

[0031] (2) Medium frequency induction is used for alloy smelting. After alloy smelting, thin strip continuous casting technology is used to produce alloy cast strips with rapid cooling equipment. The thickness is 0.02-20mm. The internal structure of alloy cast strips is approximately parallel columnar crystals, and its width is 0.2-30μm, the length is about 20-300μm.

[0032] (3) Put the cast strip alloy into a crushing device, and crush it into granular powder under the protection condition of ni...

Embodiment 1

[0037] A kind of spherical FeSiAl alloy powder and preparation method thereof, the method is carried out according to the following steps:

[0038] First, pure iron, polysilicon and refined aluminum are selected as raw materials. The alloy ratio is 85.4wt% for industrial pure iron, 9.1wt% for polysilicon, and 5.5wt% for refined aluminum. The alloy solution is smelted by atmospheric medium frequency, and the smelting power is 500KW. The time is 50 minutes. When the alloy melting temperature is 1480°C, the alloy thick strip is prepared by single-roll continuous casting method, the copper roll speed is 2m / s, the thickness of the prepared alloy strip is 0.5mm, the width is 350mm, and the internal structure is approximately parallel columnar crystals. Its width is 0.2-30 μm and its length is about 20-300 μm. The pulverization process is carried out by a ball mill, the ball-to-material ratio is 10:1, and the ball milling time is 1.5h. The feeding rate of powder spheroidizer and po...

Embodiment 2

[0042] A kind of spherical FeNi50 alloy powder and preparation method thereof, the method is carried out according to the following steps:

[0043] First, pure iron and electrolytic nickel are selected as raw materials, and the alloy ratio is 50wt% of industrial pure iron and 50wt% of electrolytic nickel. The alloy solution is smelted by vacuum intermediate frequency, the vacuum degree of the system is 5-10Pa, the smelting power is 400KW, and the smelting time is 60min. When the alloy melting temperature is 1580°C, the alloy thick strip is prepared by the quick-setting thin strip method, the copper roll speed is 20m / s, the thickness of the prepared alloy strip is 0.05mm, the width is 250mm, and the internal structure is approximately parallel columnar crystals. Its width is 0.2-30 μm and its length is about 20-300 μm. The pulverization process is carried out by a ball mill, the ball-to-material ratio is 5:1, and the ball milling time is 3 hours. The feeding rate of the jet m...

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Abstract

The invention relates to a preparing method for ball-like metal magnetically soft alloy powder, and belongs to the technical field of powder preparing. The method comprises the steps that raw materials of a metal magnetically soft alloy are weighed and mixed according to the weight ratio, intermediate-frequency induction smelting is adopted, and the molten alloy is prepared into an alloy casting strip through a thin-strip continuous casting technology; the alloy casting strip is placed into a crushing device, and the alloy casting strip is crushed into particle powder under the inert gas shielding condition; the crushed powder is placed into a shaping treatment device to be shaped, ball-like powder with the regular shape is obtained, the powder is subjected to annealing heat treatment, and fine powder is prepared through screening and collecting. According to the method, the uniformity of alloy powder components can be obviously improved, meanwhile, the powder wrapping insulating and pressing forming are facilitated through the prepared ball-like single-crystal particle powder, the uniformity degree of a soft magnetism powder core pressing insulating layer and the mechanical strength obtained after pressing forming can be obviously improved, the probability of damage of the insulating layer in the powder pressing forming process is greatly reduced, and accordingly the application field of the soft magnetism powder core is greatly enlarged.

Description

technical field [0001] The invention relates to a method for preparing spherical metal soft magnetic alloy powder, belonging to the technical field of metal and alloy powder preparation. Background technique [0002] Metal magnetic powder cores are an important part of soft magnetic materials. They have special functions of magnetoelectric conversion and energy storage filtering, and are widely used in various circuit designs. In recent years, with the advancement of science and technology, the improvement of environmental protection and energy saving requirements, the development and application of new energy, and the development trend of today's electronic information technology requirements of "high frequency, miniaturization, high precision, and low energy consumption", it has high magnetic The development of metal magnetic powder core products with high conductivity, low loss and high DC bias has a huge application space. [0003] At present, gas atomization method and...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/00H01F1/147
CPCH01F1/147B22F9/04B22F1/065B22F1/142
Inventor 贺会军盛艳伟赵新明赵文东朱学新张金辉尤林刘建刘英杰
Owner 有研增材技术有限公司
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