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A kind of co-based amorphous alloy powder and preparation process thereof

A technology of amorphous alloy and preparation process, applied in the field of amorphous alloy powder, can solve the problems of high production cost, difficult powder processing, affecting device performance, etc., and achieves the effect of meeting performance requirements, improving preparation speed, and reducing equipment investment

Active Publication Date: 2018-10-23
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of water atomization, the obtained powder is easy to form oxides and has a high oxygen content. Furthermore, when the molten metal solidifies, the generated water vapor will cover the surface of the molten metal. The existence of this water vapor film will lead to The cooling strength of the molten core metal is reduced, so that the central part of the powder cannot obtain an amorphous structure, which affects device performance
Due to the limited cooling intensity, the aerosol method can only prepare amorphous alloy powder with strong amorphous forming ability, and the production cost is high
The advantage of the direct crushing method is that the selectivity to the material is not strong, and the material utilization rate is high, but the embrittlement annealing of the amorphous thin strip is required, and it is easy to cause uneven crystallization transformation inside the thin strip due to uneven annealing, and in the After crushing, it is easy to produce powder particles with sharp angles, which brings difficulties to the subsequent processing of powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of embodiment 1 Co-P amorphous alloy powder

[0029] In this embodiment, the Co content of the amorphous alloy powder is 92.3wt%, and the P content is 7.7wt% of the composite coating.

[0030] Its preparation process comprises the following steps:

[0031] (1) Pretreatment of the surface of the metal substrate: the metal substrate is made of No. 45 steel plate, the surface of the plated substrate is machined, and then cleaned in 20wt% sodium hydroxide solution for 10 minutes to remove grease;

[0032] (2) Electroplating solution composition: cobalt chloride 0.3mol / L, cobalt sulfate 2mol / L, boric acid 40g / L, sodium hypophosphite 0.65mol / L, tartaric acid 0.8g / L, saccharin 0.4g / L, water balance;

[0033] (3) Preparation of amorphous alloy coating: the pretreated plated parts are connected to the cathode of the electroplating tank, the anode is made of graphite, the electroplating solution is stirred, the hydrochloric acid solution is titrated to make the P...

Embodiment 2

[0037] The preparation of embodiment 2 Co-Fe-P amorphous alloy powder

[0038] In the preparation of the Co-Fe-P amorphous alloy powder in this example, the Co content of the powder is 79.6 wt%, the Fe content is 13.2 wt%, and the P content is 7.2 wt%.

[0039] Its preparation process comprises the following steps:

[0040] (1) Pretreatment of the surface of the metal substrate: the metal substrate is made of No. 45 steel plate, the surface of the plated substrate is machined, and then cleaned in 20wt% sodium hydroxide solution for 10 minutes to remove grease;

[0041] (2) Plating solution composition: 0.2mol / L cobalt chloride, 1.8mol / L nickel sulfate, 0.35mol / L ferrous chloride, 50ml / L phosphoric acid, 0.65mol / L phosphorous acid, 1g / L potassium iodide, 1g tartaric acid / L, ammonium p-toluenesulfonate 0.6g / L, water balance;

[0042] (3) Preparation of amorphous alloy coating: the pretreated metal substrate is connected to the cathode of the electroplating tank, the anode is ...

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PUM

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Abstract

The invention discloses Co base amorphous alloy powder and a preparation process thereof. The Co base amorphous alloy powder comprises a specific component of Co of 40-95 wt%; and alloy elements are elements capable of electrically depositing with Co, such as one or combinations of more elements in P, Ni, Fe, Cr, Mo, W and Re. The preparation process comprises the following steps: (1) a plated surface of a metal substrate is pretreated; (2) electroplating liquid is prepared from 0.5-3 mol / L (preferably 1.5-2 mol / L) of cobalt sulfate, cobalt chloride or a mixture of the two, 0.2-0.8 mol / L of acid, 0.5-5 g / L of complexing agent, 0.2-2 mol / L of alloy element additives, 0-2 g / L of additives, and the balance of water; (3) an amorphous alloy plating layer is prepared; (4) the amorphous alloy plating layer is stripped by a mechanical or physical method; (5) the ball milling is performed for amorphous alloy particles; and (6) Co base amorphous alloy powder with different particle sizes is screened.

Description

technical field [0001] The invention relates to an amorphous alloy powder, in particular to a Co-based amorphous alloy powder and a preparation process thereof. Background technique [0002] With the development of electronic power and communication industry, electronic components are developing in the direction of miniaturization, high frequency and high current. [0003] development, and the requirements for the electromagnetic compatibility performance of electronic equipment are getting higher and higher. The traditional amorphous strip iron core, soft ferrite [0004] And metal magnetic powder cores cannot meet the demand, and the application is limited. Mainly manifested in: (1) The amorphous strip core works at high frequency [0005] (2) Soft ferrite has low high-frequency loss, but its saturation magnetic induction and permeability are low, which cannot meet the development needs of miniaturization and high current; (3) Metal magnetic powder cores have problems s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/04B22F1/00B22F9/04C25D3/56
CPCB22F1/0003B22F9/002B22F9/04B22F2009/043C22C45/04C25D3/562
Inventor 罗奕兵胡传钱雨生
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY