Method and device for preparing gradient plating layer through laser-assisted electro-deposition

Abstract

The invention discloses a method and device for preparing a gradient plating layer through laser-assisted electro-deposition. The method comprises the steps that electro-deposition of a deposition layer is performed on a workpiece substrate through pulse laser and electrochemical reaction, meanwhile, the deposition layer on the surface of the workpiece substrate is remelted through the heat of the pulse laser, a uniformly-distributed remelting layer is obtained, then residual heat is used for inducing electroplating, and the plating layer is obtained on the surface of the remelting layer. According to the method, a three-layer gradient structure of base material-remelting layer-plating layer can be synchronously prepared, an interface between a plating layer material and a base material is eliminated, combination of the plating layer and a base body is facilitated, the plating layer stripping phenomenon is improved, and meanwhile, the surface performance of the workpiece substrate can be guaranteed. In addition, the device can realize relative movement between the laser beam and the workpiece substrate, so that instantaneous remelting can be initiated on the surface of the workpiece by the aid of the heat accumulation effect of multiple pulse laser beams.

Description

technical field [0001] The invention relates to the technical field of composite special processing, in particular to a method and device for preparing gradient coatings by laser-assisted electrodeposition, which is suitable for the preparation of high-performance surface coatings. Background technique [0002] The essence of electrodeposition technology is a reduction reaction, which is mainly applied to the surface coating of workpieces to modify and modify them to improve surface properties. A single electrodeposition technology will have low deposition rate, poor uniformity of deposition layer and defects such as pinholes, pitting and internal stress during the manufacturing process. Laser-assisted electrodeposition technology uses the high energy density of the laser beam to assist the electrochemical reaction process in the electrodeposition process, which can increase the deposition rate and improve the coating performance. [0003] There are certain studies on the p...

AI Technical Summary

Problems solved by technology

Although changing a single electrochemical parameter can obtain a coating with better functionality and dense surface, but there are many parameter variable groups, which reduces production efficiency and increases costs in industrial production.

For the coating, the ideal gradient coating should achieve a complete gradient change in composition and structure from the substrate to the surface of the coating, but the existing methods for preparing gradient coatings do not have high bonding strength with the substrate, and are less affected by external forces in practical applications. Easy to peel off

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