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 po

Method used

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  • Preparing method for ball-like metal magnetically soft alloy powder
  • Preparing method for ball-like metal magnetically soft alloy powder

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Example Embodiment

[0029] The spherical metal soft magnetic alloy powder and the preparation method thereof of the present invention include the following steps:

[0030] (1) Weigh the raw materials according to the weight ratio, each alloy composition is FeSi6.5, FeSi9.5Al5.5, FeNi50 and FeNi81Mo2: raw materials are industrial pure iron, polysilicon, refined aluminum, electrolytic nickel and metallic molybdenum, and control carbon 、The sulfur content is 0.005wt%-0.01wt%;

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

[0032] (3) Put the cast strip alloy into the crushing device and crush it into granular powder under the protection of nitrogen, argon or helium. The processing time is 0.5-5h.

[...

Example Embodiment

[0036] Example 1

[0037] A quasi-spherical FeSiAl alloy powder and a preparation method thereof. The method is carried out in the following steps:

[0038] First, select raw material pure iron, polysilicon and refined aluminum as raw materials. The alloy ratio is 85.4wt% of industrial pure iron, 9.1wt% of polysilicon, and 5.5wt% of refined aluminum. The alloy solution is smelted at atmospheric medium frequency, and the melting power is 500KW. The time is 50min. When the alloy melting temperature is 1480℃, the thick alloy strip is prepared by the single-roll continuous casting method, the copper roller 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 0.2-30μm, and its length is about 20-300μm. The ball-to-material ratio is 10:1 and the ball-milling time is 1.5h. The feeding rate of the powder spheroidizing machine is 500Kg / h, and the processing time is 2h. ...

Example Embodiment

[0041] Example 2

[0042] A spherical FeNi50 alloy powder and a preparation method thereof. The method is carried out in the following steps:

[0043] First, raw material pure iron and electrolytic nickel are selected as raw materials, and the alloy ratio is 50% by weight for industrial pure iron and 50% by weight for electrolytic nickel. The alloy solution is smelted by vacuum intermediate frequency, the system vacuum is 5-10Pa, the melting power is 400KW, and the melting time is 60min. When the alloy melting temperature is 1580℃, the thick alloy strip is prepared by the rapid solidification thin strip method, the copper roller 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 0.2-30μm, and its length is about 20-300μm. The ball-to-material ratio is 5:1 and the ball-milling time is 3h. The feed rate of the jet mill is 400Kg / h, and the treatment time is 3h....

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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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