Ni-P powder production process

Abstract

The invention relates to an Ni-P powder production method. A process adopts electroplating, stripping and crushing to prepare amorphous alloy powder as a principle, and is characterized by comprisingthe following steps of (1) selecting a metal base and processing a surface to be plated; (2) adopting an electroplating method for preparing a cobalt-nickel-ferrum-phosphor amorphous alloy coating, and adopting a graphite plate or a stainless steel plate as an anode, wherein the current density of an electrode is 0.05 to 0.5A / mm<2>; and titrating a hydrochloric acid solution to enable a Ph value of a plating solution to be smaller than 3, wherein the plating temperature is 50 to 85 DEG C; (3) rolling, bending, shot blasting, and enabling the amorphous alloy coating to fall off from a surface of the metal base; (4) crushing the fallen-off amorphous alloy coating by adopting a ball grinder and a particle crusher, wherein during crushing, the ball grinder and the particle crusher adopt a forced cooling manner or a clearance working manner; and (5) screening to obtain Ni-P amorphous alloy powder with different thicknesses.

Description

technical field [0001] The invention relates to an amorphous alloy powder, in particular to a production process of Ni-P powder. 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 induction and magnetic permeabilit...

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