Method for improving binding force of plating layer of neodymium-iron-boron magnet and neodymium-iron-boron magnet electroplating piece

Abstract

The invention discloses a method for improving the binding force of a plating layer of a neodymium-iron-boron magnet and a neodymium-iron-boron magnet electroplating piece. The method comprises the steps that firstly, a neodymium-iron-boron semi-finished product workblank is subjected to multi-thread slicing to obtain neodymium-iron-boron semi-finished product slices, then the neodymium-iron-boronsemi-finished product slices are subjected to chamfering, deoiling, washing, acid pickling, ultrasonic wave washing, excitation and washing, and finally the neodymium-iron-boron semi-finished productslices are subjected to electroplating treatment, so that the neodymium-iron-boron magnet electroplating piece is obtained. The method provided by the invention improves the bonding force of the plating layer of the neodymium-iron-boron magnet and the corrosion resistance of the magnet, has high production efficiency and low production cost, and can be applied to automatic production.

Description

Technical field [0001] The invention belongs to the field of electroplating technology, and specifically relates to a method for improving the bonding force of the coating of a neodymium iron boron magnet and a neodymium iron boron magnet electroplating piece. Background technique [0002] The sintered neodymium iron boron magnets known as the "magnet king" are widely used in various fields of new energy vehicles, smart homes and smart communications due to their excellent magnetic properties. But sintered NdFeB material is a kind of active alloy material, its material is loose and porous, it is very easy to be oxidized and corroded. [0003] Electroplating is a very widely used protective method in the NdFeB industry. Common electroplating methods include electroplating zinc and electroplating nickel, copper and nickel. With the development of NdFeB manufacturing technology, higher requirements are put forward for the protective coating of sintered NdFeB materials, which not only...

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Problems solved by technology

[0004] In the prior art, the NdFeB protective coating production process often adopts the NdFeB semi-finished small pieces in sequence through bonding, multi-wire cutting, inserting and cooking tooling, ultrasonic cleaning, cooking cleaning, drying, end surface grinding, After drying treatment, the surface of the NdFeB semi-finished small pieces after multi-wire cutting is smooth in the subsequent end face grinding process, and the flat NdFeB semi-finished small pieces are then electroplated to obtain NdFeB magnet electroplated parts with a protective coating. However, this treatment method is relatively cumbersome, the processing efficiency is low, and the processing cost is high. At the same time, the bonding force between the NdFeB magnet and the coating in the NdFeB magnet electroplated parts is poor.

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