Production process for nickel alloy amorphous powder based on electric brushing plating

Abstract

The invention discloses a production process for nickel alloy amorphous powder based on electric brushing plating. The nickel alloy amorphous powder based on electric brushing plating comprises 40-82wt% of nickel, 8-30 wt% of cobalt, 5-15 wt% of iron and 5-15 wt% of phosphorus, and the powder is of an amorphous structure. The production process is characterized by comprising the steps that (1), ametal substrate is selected, and derusting and degreasing treatment is carried out on a to-be-plated surface; (2), the nickel alloy amorphous coating is prepared, wherein the nickel alloy amorphous coating is prepared by adopting an electric brushing plating method, an anode adopts a graphite plate or a stainless steel plate, the current density of the electrode is 0.5-5 A / mm<2> (preferably 1.5-3A / mm<2>), the relative movement speed of the electrode is 5-20 m / min (preferably 10-15 m / min), a hydrochloric acid or sulfuric acid solution is dropwise added to make the Ph value of a plating solution be less than 3, and the plating temperature is 40-75 DEG C; (3), the amorphous coating is enabled to fall off from the surface of the metal substrate by adopting a rolling method; (4), the fallen amorphous coating is crushed in the modes of a ball mill, a particle crusher and the like; and (5), the nickel alloy amorphous powder with the different degree of finish is screen out by adopting a screen.

Description

technical field [0001] The invention relates to an amorphous alloy powder, in particular to a production process based on brush-plating nickel alloy amorphous 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 magne...

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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