Metal surface PVD (Physical Vapor Deposition) decorative coating method

Abstract

The invention discloses a metal surface PVD decorative coating method, which includes a preparation method for decorative coating as single-tone coating and a preparation method for decorative coating as composite-tone coating. The method adopts the PVD method to respectively deposit the two types of colored coating layers on a pure metal coating layer, the thickness of the last layer of coating is controlled to be not greater than 0.02Mu m, so that the last layer of coating is translucent, as a result, the previous layer of coating layer can be seen through the last layer of coating, and thereby the effect of a target color is achieved when the different colored coating layers are deposited to be superposed. Because of the method, the PVD decorative coating process becomes simple and easy to carry out, and practical operation can be easily controlled; moreover, the phenomena of color shading and color ununiformity in products can be effectively improved, consequently, the PVD yield is effectively increased, and the color difference in the same batch of products is small; the production efficiency is high, the load in the capability of equipment is decreased, energy consumption is reduced, the production period is shortened, and the demand of customers can be rapidly satisfied.

Description

technical field [0001] The invention relates to metal surface treatment, in particular to a PVD decorative coating method on the metal surface. Background technique [0002] PVD (Physical Vapor Deposition), that is, physical vapor deposition, refers to the use of gas discharge to evaporate the metal target and ionize both the evaporated material and the gas under vacuum conditions, and use the acceleration of the electric field to make the evaporated material and its reaction products deposited on the workpiece. PVD basic methods: vacuum evaporation, sputtering, ion plating (hollow cathode ion plating, hot cathode ion plating, arc ion plating, active reactive ion plating, radio frequency ion plating, DC discharge ion plating). [0003] PVD decorative coating is a kind of optical film, and the main cause of color is the interference of light. PVD decorative coating needs to select the target type, material and gas (such as nitrogen, oxygen, acetylene, argon, etc.), after de...

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Problems solved by technology

[0006] Among them, the process of composite tint film is difficult, and it needs to add a variety of gases to participate in the reaction. The color forming process is complex and unstable, and the color difference is large, and the single-tone film process also has the problem of large yin and yang colors of the product, and large color differences between products in the same furnace. , leading to a very low yield rate of products produced by the current process, which requires multiple reworks, resulting in low production efficiency, increased equipment production load, increased power energy consumption, increased production costs, and prolonged production periods, which cannot quickly meet customer order needs.