Process of preparation of Fe alloy amorphous powder by using electroplating method

Abstract

Disclosed is a production method of Co-Fe-Ni-P powder. The technical principle is that alloy amorphous powder is made by electroplating and stripping and crushing. The production method is characterized in that the production method includes the following steps that (1), a metal base plate is selected and the surface of a plated surface is treated; (2), an electroplating method is used to preparecobalt-nickel-iron-phosphorus amorphous alloy cladding layer; the positive pole adopts a graphite plate or a stainless steel plate; the electric current density of the electrode is 0.05-0.5 A / mm<2>; and hydrochloric acid solution is titrated so that the cladding solution Ph value is less than 3, and the cladding temperature is 40-85 DEG C; (3), methods of rolling, bending and shot peening and thelike are used to make the amorphous alloy cladding layer to fall off from the surface of the metal base plate; (4), the fell off amorphous alloy cladding layer is crushed by using methods of a ball grinding machine, a particle crushing machine and the like; during crushing, the ball grinding machine and the particle crushing machine can adopt a forced cooling method and an interval working method;and (5), the Co-Fe-Ni-P amorphous alloy powder in different crudeness or fineness are sieved.

Description

technical field [0001] The invention relates to an amorphous alloy powder, in particular to a process for preparing Fe alloy amorphous powder by electroplating. 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 can no longer meet the demand. The performance defects of ordinary magnetic materials are mainly manifested in: (1) The eddy current induced by the amorphous strip iron core causes a large loss during high frequency operation, which limits its application in the high frequency field; (2) The soft magnetic ferrite has low high frequency loss , but the saturation magnetic in...

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