Method for depositing functionally-graded nano-multilayer coating on surface of steel workpiece and product comprising functionally-graded nano-multilayer coating

A functionally gradient and nano-multilayer technology, applied in coating, metal material coating process, ion implantation plating, etc. Increased control difficulty and other issues, to overcome the effect of insufficient density of the film structure

Active Publication Date: 2016-05-11
ZHUHAI ROSSINI WATCH IND
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing (Cr, Al, Si) N and (Cr, Si) (C, N) thin films are still prepared using a single ion plating process, which is bound to cause large particle contamination on the surface of the cathode arc ion plating to make the film surface rough Technical defects such as high density and low ionization rate of magnetron sputtering ion plating lead to insufficient density of film structure
Although, there have been researches to prepare (Cr, Al, Si)N or (Cr, Si) (C, N) thin films by cathodic arc ion plating and DC reactive magnetron sputtering (see for example: YoungSuHong et al., EffectsofCrinterlayeronmechanicalandtribologicalpropertiesofCr -Al-Si-Nnanocompositecoating[J]TransactionsofNonferrousMetalsSocietyofChina,2011,21:62-67;Jun-HaJeon等人,EffectsofSiadditiononthecharacteristicevolutionandsynthesesofnanocompositeCr-Si-C-Ncoatingspreparedbyahybridcoatingsystem[J]Surface&CoatingsTechnology,2005,200:1635-1639),但由于其采用 Mutually independent Cr, Al, Si targets and CH 4 Gas source, it is easy to increase the difficulty of controlling the stoichiometric ratio of doping elements Al, Si and C, and bring unnecessary safety hazards
[0007] Cathodic arc ion plating CrN film (3 ~ 5μm) has a surface hardness of about HV1000 ~ 1500, which has good wear resistance and scratch resistance. However, for watch appearance parts, its inherent large particles will inevitably affect the coating. Surface finish and decorative color (the appearance of CrN coating is darker, so its visual effect is not good)

Method used

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  • Method for depositing functionally-graded nano-multilayer coating on surface of steel workpiece and product comprising functionally-graded nano-multilayer coating
  • Method for depositing functionally-graded nano-multilayer coating on surface of steel workpiece and product comprising functionally-graded nano-multilayer coating
  • Method for depositing functionally-graded nano-multilayer coating on surface of steel workpiece and product comprising functionally-graded nano-multilayer coating

Examples

Experimental program
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Effect test

Embodiment 1

[0144] 1) Pretreatment of stainless steel workpieces: At room temperature, place the polished stainless steel watch exterior parts in an ultrasonic cleaner filled with environmentally friendly water-based metal cleaning fluid for surface cleaning and degreasing; then put the cleaned workpieces into ethanol solution for dehydration treatment After drying.

[0145] 2) Ion cleaning of the surface of the workpiece: (1) Place the polished stainless steel watch exterior parts in the reactor and keep the vacuum in the reactor at 9.0×10 -3 Pa; (2) Start the Ta-HCD electron gun and the heating device in the furnace and control the current to 80A after the Ta-HCD electron gun is arcing. The plasma arc of the Ta-HCD source directly irradiates the surface of the workpiece until the temperature in the vacuum chamber reaches 120°C; (3) Keep the vacuum in the reactor at 9.0×10 -3 Pa, adjust the Ta-HCD electron gun current to 100A and apply a pulse negative bias to the workpiece to -100V; (4) Sta...

Embodiment 2

[0157] 1) Pretreatment of stainless steel workpieces: At room temperature, place the polished stainless steel watch exterior parts in an ultrasonic cleaner filled with environmentally friendly water-based metal cleaning fluid for surface cleaning and degreasing; then put the cleaned workpieces into ethanol solution for dehydration treatment After drying.

[0158] 2) Ion cleaning of the surface of the workpiece: (1) Place the polished stainless steel watch exterior parts in the reactor and keep the vacuum in the reactor at 5.0×10 -3 Pa; (2) Start the Ta-HCD electron gun and the heating device in the furnace and control the current to 80A after the Ta-HCD electron gun is arcing. The plasma arc of the Ta-HCD source directly irradiates the surface of the workpiece until the temperature in the vacuum chamber reaches 120°C; (3) Keep the vacuum in the reactor at 5.0×10 -3 Pa, adjust the Ta-HCD electron gun current to 100A and apply a pulse negative bias to the workpiece to -100V; (4) Sta...

Embodiment 3

[0171] 1) Pretreatment of stainless steel workpieces: At room temperature, place the polished stainless steel watch exterior parts in an ultrasonic cleaner filled with environmentally friendly water-based metal cleaning fluid for surface cleaning and degreasing; then put the cleaned workpieces into ethanol solution for dehydration treatment After drying.

[0172] 2) Ion cleaning of the surface of the workpiece: (1) Place the polished stainless steel watch exterior parts in the reactor and keep the vacuum in the reactor at 7.0×10 -3 Pa; (2) Start the Ta-HCD electron gun and the heating device in the furnace and control the current to 80A after the Ta-HCD electron gun is arcing. The plasma arc of the Ta-HCD source directly irradiates the surface of the workpiece until the temperature in the vacuum chamber reaches 120°C; (3) Keep the vacuum in the reactor at 7.0×10 -3 Pa, adjust the Ta-HCD electron gun current to 100A, and apply a pulse negative bias to the workpiece to -100V; (4) St...

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Abstract

The invention relates to a method for depositing a functionally-graded nano-multilayer coating on the surface of a steel workpiece and a product comprising the functionally-graded nano-multilayer coating and particularly discloses the method for depositing the functionally-graded nano-multilayer coating on the surface of the steel workpiece and the functionally-graded nano-multilayer coating deposited on the surface of the steel workpiece. The invention further relates to the product. The product comprises the steel workpiece and the functionally-graded nano-multilayer coating which is deposited on the surface of the steel workpiece and can cover at least part of the surface of the steel workpiece. The functionally-graded nano-multilayer coating comprises a Cr base layer deposited on the surface of the steel workpiece, a CrN transition layer deposited on the Cr base layer, a Cr(C,N) gradient layer deposited on the CrN transition layer, and a (Cr,Al,Si)(C,N) surface layer deposited on the Cr(C,N) gradient layer. Gray black and gun black are the main colors of the functionally-graded nano-multilayer coating; the overall thickness of the functionally-graded nano-multilayer coating is 3-5 microns; and the surface hardness value reaches HV 2400-3600. The functionally-graded nano-multilayer coating has the high degree of finish, high combining strength and high surface hardness and is good in wear resistance and corrosion resistance.

Description

Technical field [0001] The invention relates to a method for depositing a functionally graded nano multilayer coating on the surface of a steel workpiece and the functionally graded nano multilayer coating deposited on the surface of a steel workpiece. The present invention also relates to a product comprising the steel workpiece and the functionally graded nano multilayer coating deposited on the surface of the steel workpiece and covering at least a part of the surface of the steel workpiece. Background technique [0002] The traditional method of forming a wear-resistant, corrosion-resistant and oxidation-resistant coating on the surface of steel workpieces, especially stainless steel workpieces, is to electroplate hard chromium on the surface, but the hexavalent chromium produced during electroplating will seriously pollute the environment, so it is gradually being vacuum ionized ( IonPlating) Nitride coating instead. The CrN (chromium nitride) coating has the advantages of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/35C23C14/16C23C14/06
CPCC23C14/0641C23C14/0664C23C14/16C23C14/325C23C14/352C23C14/354
Inventor 赵可沦刘海华王永宁
Owner ZHUHAI ROSSINI WATCH IND
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