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Deplating method for carbon-based thin film on surface of metal workpiece

A technology for metal workpieces and workpiece surfaces, which is applied in the field of removing surface vapor deposition coatings to achieve the effect of avoiding corrosion damage and smoothing the surface

Active Publication Date: 2016-08-10
广州今泰科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is only aimed at the rapid stripping of the carbon-based coating on the surface, and there is almost no etching for the local area without carbon-based coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Decoating treatment after the diamond coating is prepared by the hot wire on the surface of the M2 steel test piece

[0028] An M2 steel test piece with a diamond coating about 2 microns thick on the surface, the sample is black, and the size is 100mmx30mmx2mm. It is known that the diamond coating is prepared by the hot wire method, and it is necessary to completely remove the coating to obtain a sample with a smooth surface.

[0029] A method for deplating a carbon-based thin film on a metal workpiece surface, comprising the following steps:

[0030] 1) Put the M2 steel test piece with surface coating into the aqueous solution containing 5wt% commercially available "Qiqiang" metal degreasing cleaning agent, after boiling for about 5 minutes, rinse the test piece with clean city water and dry it Dry; hang the M2 steel test piece with surface coating on the jig and put it into the vacuum system.

[0031] 2) Close the door of the vacuum chamber, and start the ...

Embodiment 2

[0034] Embodiment 2: The fading treatment after the diamond-like coating is prepared on the surface of the 316L watch case

[0035] The 316L case with a diameter of 38mm is coated with a matrix / Cr / CrC / a‐C:H diamond-like coating, in which the surface diamond-like coating is 1.2 microns, and the metal and its carbide transition layer is 1.2 microns. Due to the preparation of the coating, the coating is partially peeled off, the surface is black-gray, and occasionally there are white spots that can be seen by visual inspection. It is necessary to remove the treated coating and then re-coat it.

[0036] A method for deplating a carbon-based thin film on a metal workpiece surface, comprising the following steps:

[0037] 1) Put the watch case into an aqueous solution containing 5wt% commercially available "Qiqiang" metal degreasing agent, boil for about 5 minutes, rinse the test piece with clean city water and dry it; hang the watch case on Put the vacuum system on the jig;

[00...

Embodiment 3

[0041] Embodiment 3: the stripping treatment of Ti / TiN / AlTiN / graphite coating prepared on the surface of H13 steel test piece

[0042] The surface preparation structure of the H13 steel test piece with a size of 100mmx30mmx2mm is Cr / CrN / AlTiN / graphite coating, the thickness of the black graphite coating on the surface is 0.8 microns, and the thickness of the transition coating is 2 microns; the edge is wiped with 1500 water sandpaper drop, exposing the substrate.

[0043] A method for deplating a carbon-based thin film on a metal workpiece surface, comprising the following steps:

[0044] 1) Put the test piece into an aqueous solution containing 5wt% of the commercially available "Qiqiang" metal degreasing agent, boil for about 5 minutes, rinse the test piece with clean city water and dry it; hang the test piece on the Put the vacuum system on the special jig;

[0045] 2) Close the door of the vacuum chamber, and start the workpiece holder to rotate; the vacuum chamber is pu...

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PUM

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Abstract

The invention discloses a deplating method for a carbon-based thin film on the surface of a metal workpiece. Oily pollutants on the surface of the steel-substrate workpiece are removed firstly; then the pretreated workpiece is fixed to a workpiece rack in a vacuum chamber of a vacuum coating system containing a hollow cathode ion source, a gas inlet pipeline for guiding in working gas is mounted, and oxygen plasma is obtained when oxygen is led in; and the surface of the sample is bombarded by the oxygen plasma generated by the ion source, and then the workpiece separated from the carbon-based coating is soaked in a faintly-acid soak solution and then cleanly rinsed. The carbon-based coating can be completely stripped off in the oxygen plasma bombarding process, and the stripping speed can reach 0.5-1.0 micron / h; due to oxidation protection in the carbon-based surface layer stripping process, the positions where the coating is abraded or stripped are protected, and excessive etching of the positions cannot be caused by the proper oxygen ion density and energy.

Description

technical field [0001] The invention relates to a stripping method, in particular to a treatment method for completely stripping the coatings after depositing diamond-like, diamond and graphite-based coatings on the metal surface, and is a method for stripping the surface vapor deposition coatings. Background technique [0002] Because carbon-based materials have extremely low friction coefficients, high thermal conductivity, and diamond coatings and diamond-like coatings also have high hardness, they are widely used in the surface coating of key basic elements (cutting tools, molds) in the advanced manufacturing field. layer, to improve the service life of the tool and mold and the efficiency of processing and manufacturing, and to increase the technical added value of the tool and mold. The carbon-based coating on the surface of the workpiece needs to be removed in the following two cases: 1) The quality of the coating is unqualified during the coating preparation process;...

Claims

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Application Information

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IPC IPC(8): C23G5/00C23G1/18C23G1/02
CPCC23G1/02C23G1/18C23G5/00
Inventor 彭继华苏东艺谭笛
Owner 广州今泰科技股份有限公司
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