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A kind of chromium-based coating film and preparation method thereof

A technology of coating chamber and chromium target, which is applied in the field of chromium-based coating and its preparation, can solve the problems of gravure plate wear-resistant layer with many surface defects, surface prone to micro-cracks, difficult thickness uniformity, etc., to improve surface atomic activity , less surface defects, simple and easy operation

Active Publication Date: 2015-10-21
CHINA BANKNOTE PRINTING & MINTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the gravure plate wear-resistant layer prepared by magnetron sputtering method in the prior art has many surface defects, microcracks are prone to appear on the surface, it is difficult to achieve thickness uniformity in a large area, and When the coating needs to be removed in the later stage, the operation is complicated and time-consuming, so as to provide a chromium-based coating with less surface defects and good wear resistance and its preparation method

Method used

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  • A kind of chromium-based coating film and preparation method thereof
  • A kind of chromium-based coating film and preparation method thereof
  • A kind of chromium-based coating film and preparation method thereof

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Embodiment 1

[0034] The present embodiment provides a kind of gravure plate chrome-based coating film, and it is made of Cr-Cr 2 N two-phase compound layer composition, in the two-phase compound layer, Cr and Cr 2 The molar ratio of N is 16:3, which is formed by plating as follows:

[0035](1) In the coating chamber, nitrogen gas and inert working gas argon gas are simultaneously introduced at the flow rates of 90sccm and 110sccm respectively, and magnetron sputtering is used to pass through four pairs of twin chromium columns that are columnar and parallel to each other with a length of 1.5m. Targeting is set on the cooling roller and is plated on the nickel-based gravure metal substrate base material that rotates with the cooling roller, the plating time is 30min, and the plating temperature is 25-100°C (chrome plating process It is the heating process of chromium, so the chromium plating temperature is not a constant value, but a range); the area of ​​the nickel-based gravure metal sub...

Embodiment 2

[0047] This embodiment provides a gravure wear-resistant layer, which includes a Cr transition layer, a chromium-based coating and a Cr smoothing layer, wherein the Cr transition layer is located between the chromium-based coating and the surface of the substrate, and the The Cr smoothing layer is located outside the chromium-based coating, that is, on the side away from the substrate; the thickness ratio of the Cr transition layer, the chromium-based coating, and the Cr smoothing layer is 0.6:10:0.2.

[0048] Wherein, the chromium-based coating is composed of Cr-Cr 2 N two-phase compound layer composition, in the two-phase compound layer, Cr and Cr 2 The molar ratio of N is 10:1, which is formed by plating as follows:

[0049] (1) In the coating chamber, nitrogen and inert working gas argon are introduced at the flow rates of 70sccm and 130sccm at the same time, and the magnetron sputtering method is used to pass through three pairs of twin chromium columns that are columnar...

Embodiment 3

[0055] This embodiment provides a gravure wear-resistant layer, which includes a Cr transition layer, a chromium-based coating and a Cr smoothing layer, wherein the Cr transition layer is located between the chromium-based coating and the surface of the substrate, and the The Cr smoothing layer is located outside the chromium-based coating, that is, on the side away from the substrate; the thickness ratio of the Cr transition layer, the chromium-based coating, and the Cr smoothing layer is 0.2:5.3:0.6.

[0056] Wherein, the chromium-based coating is composed of Cr-Cr 2 The N two-phase compound layer consists of Cr-Cr 2 N two-phase compound layer composition, in the two-phase compound layer, Cr and Cr 2 The molar ratio of N is 17:1, and it is formed by plating as follows:

[0057] (1) In the coating chamber, nitrogen and inert working gas argon are introduced at the same time at flow rates of 30sccm and 170sccm, respectively, and magnetron sputtering is used to pass through f...

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Abstract

The invention relates to a chrome-based coating film and a preparation method thereof. For the structure, the chrome-based coating film comprises a Cr-Cr2N two-phase compound layer, thus being beneficial to releasing the internal stress of the coating film, reducing the internal stress and lowering the possibility of generating defects on the surface of the coating film, and being plated with uniform thickness in a large area range. The chrome-based coating film prepared by the method has fewer surface defects, has no micro cracks, can be plated with uniform thickness in an extra large area range, and also has characteristics of high hardness, wear resistance and corrosion resistance; furthermore, when needing to be cleared in later period, the chrome-based coating films on the surface of a metal substrate and in the pattern of the metal substrate can be completely cleared in short time, thus being simple and easy to operate.

Description

technical field [0001] The invention relates to a chromium-based coating and a preparation method thereof, belonging to the technical field of printing plate production. Background technique [0002] Compared with the ordinary printing process, gravure printing is widely used in the production of printed banknotes, valuable securities and anti-counterfeiting products because it can make the printed matter have a special "concave-convex touch". In order to increase the surface wear resistance, printing durability and service life of the gravure plate, it is usually necessary to electroplate a chromium layer with a thickness of about 10 μm on the surface of the base material of the gravure plate. In the prior art, after engraving patterns on the gravure metal base material (such as nickel, copper, iron, etc.), the electroplating process is used to plate chromium on the above gravure metal base material, thereby forming a gravure The surface of the printing plate has a wear-re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/06
Inventor 刘永江刘雪敬李晓伟潘峰王雪
Owner CHINA BANKNOTE PRINTING & MINTING
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