CN110344001A - A kind of carbon steel surface corrosion-resistant erosion graded metal coating and preparation method thereof - Google Patents
A kind of carbon steel surface corrosion-resistant erosion graded metal coating and preparation method thereof Download PDFInfo
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- CN110344001A CN110344001A CN201910758253.8A CN201910758253A CN110344001A CN 110344001 A CN110344001 A CN 110344001A CN 201910758253 A CN201910758253 A CN 201910758253A CN 110344001 A CN110344001 A CN 110344001A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
- C23C14/325—Electric arc evaporation
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/028—Including graded layers in composition or in physical properties, e.g. density, porosity, grain size
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Abstract
The present invention relates to a kind of carbon steel surface corrosion-resistant erosion graded metal coatings and preparation method thereof, using carbon steel as basis material, using pure Ti and Cr80Ni20 (mass ratio) alloy as target, Ti/TiCrNi/CrNiFe gradient coating is prepared using arc-added glow plating technology.It is target first with Cr80Ni20 alloy, using argon gas as working gas, seeps CrNi on carbon steel surface, prepare CrNiFe gradient coating；Then it is target with pure Ti, using argon gas as working gas, plates Ti after Ti is seeped on the basis of CrNiFe coating, prepare Ti/TiCrNi gradient coating.Ti/TiCrNi/CrNiFe gradient coating prepared by the present invention, overall thickness are in typical metallurgical bonding, and its structure, ingredient and the equal gradient of thermophysical property with matrix between 113-236 μm.Neutral salt spray corrosion test test result showed graded metal coating lacing film after 180 days, and surface is without obvious corrosion phenomena.Coating prepared by the present invention can provide permanently effective anti-marine corrosion protection for carbon steel, have important strategic importance to the reliability of carbon steel part military service and safety under marine environment is improved.
Description
Technical field
The invention belongs to field of metal material surface treatment, and in particular to a kind of carbon steel surface corrosion-resistant erosion graded metal coating
And preparation method thereof.
Background technique
Disclosing the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without certainty
It is considered as recognizing or implying in any form that information composition has become existing skill well known to persons skilled in the art
Art.
The exploration and development of marine field be unable to do without advanced marine engineering equipment.To develop advanced ocean engineering
Equipment, must just pay attention to military service performance of the marine engineering equipment under marine environment, guarantee the quality of marine engineering equipment.Carbon steel
The mechanics of materials and physical and chemical performance are good, and price is low, are widely used in marine engineering equipment field.But carbon steel material
Corrosion resistance is poor, and serious corrosion damage is subject under marine environment, leads to the big of marine engineering equipment medium carbon steel component life
Width shortens.With deeply developing for marine resources, harsh marine environment proposes the reliability of marine engineering equipment and safety
Higher requirement is gone out.Titanium has excellent corrosion resistance in the seawater, especially has very strong anti-corruption to chloride ion
Erosion ability, therefore titanium is widely used in offshore oil drilling platform, the marine fields such as sea water desalination.But titanium is at high cost, because
This can significantly improve the cost of equipment using titanium component.
But depend merely on material itself, it is difficult to meet the requirement of offshore equipment component corrosion resistance and low cost under marine environment.
Therefore, corrosion-resistant finishes is designed and developed, the main solution for breaking through Conventional marine engineer equipment metal material performance boundary is become
Approach has important strategic importance to the reliability and safety that improve equipment military service.
Currently, being mainly electroplated in the method that steel material surface prepares corrosion-resistant coating, ion plating, plasma spray technology.But
The coating of electroplating technology preparation is thin, film-substrate cohesion is poor, and electroplate liquid will cause serious environmental pollution.Plasma spray technology is deposited
It is in coarse sheet in spraying layer tissue, uneven components, performance is unstable, and spray coating porosity is higher, crackle is more.Gas
The film layer of phase deposition technique preparation is thin, usually only several microns, and binding force is poor between film layer and matrix, in severe military service ring
It easily falls off under border, is difficult to provide effective protection for a long time.Chemical vapor deposition has titanium alloy compressor blade relatively strong
Corrosivity.In addition, being still to restrict the technology of preparing to be applied to reality for the preparation problem of complex contour, serious shielding component
The critical issue of equipment.The coating of laser surface treating technology preparation, crackle are still the key factor for restricting its practical application.
Summary of the invention
In order to overcome the above problem, the present invention provides a kind of carbon steel surface corrosion-resistant erosion graded metal coating and its preparation sides
Method is seeped using pure Ti and Cr80Ni20 (mass ratio) alloy as target using arc-added glow using carbon steel Q235 as basis material
Coating technology prepares Ti/TiCrNi/CrNiFe gradient coating on carbon steel surface.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
A kind of carbon steel surface corrosion-resistant erosion graded metal coating, comprising:
It is supported on the CrNiFe gradient layer on carbon steel surface；
The TiCrNi gradient layer being supported on Cr-NiFe gradient layer；
And it is supported on the Ti gradient layer on TiCrNi gradient layer.
Research is found: since solid solubility of the Ti in steel is limited, being not suitable for directly in carbon steel surface plating Ti.Therefore, originally
Application first seeps Cr, Ni on carbon steel surface, then seeps Ti again, using the gradient of transition layer structure, ingredient and thermophysical property,
Make Ti/TiCrNi/CrNiFe gradient coating in conjunction with matrix more closely, it is corrosion-resistant stronger.
Research is found: with the increase of coating layer thickness, corrosion resistance enhances, but after coating layer thickness reaches a certain level,
The thickness for continuing increase coating promotes the corrosion resistance of coating little.Therefore, in some embodiments, the coating total thickness
Degree is 113-236 μm.The problem of prepared coating has excellent corrosion resistance, effectively prevents spalling failure uses
Service life is long.
There is preferable corrosion resistance and basal body binding force, this Shen in order to make to obtain Ti/TiCrNi/CrNiFe gradient coating
Please the thickness of each gradient layer is optimized, in some embodiments, surface Ti Thickness of Gradient Layer is 8-25 μm；TiCrNi ladder
Layer is spent with a thickness of 46-75 μm；When CrNiFe Thickness of Gradient Layer is 54-136 μm, prepared graded metal coating corrosion resistance is most
By force, long service life.
The present invention also provides a kind of preparation methods of carbon steel surface corrosion-resistant erosion graded metal coating, comprising:
Cr-Ni is seeped using arc-added glow plating technology on carbon steel surface, forms CrNiFe gradient coating；
Plate Ti after Ti is first seeped on CrNiFe gradient coating surface, sequentially form TiCrNi gradient layer and Ti gradient layer to get.
Arc-added glow plating technology is to introduce cold cathode arc source in double-layer glow ion penetration plating appts, aura is put
Electricity and arc discharge combine, and setting auxiliary source electrode, is imitated using glow discharge hollow cathode around processed workpiece
Workpiece should be made to be brought rapidly up, it is both heating source and infiltration element assists supply source.Gold is set on vacuum vessel wall simultaneously
Belong to cathode arc target source, is ignited arc source using vacuum arc discharge, constantly launch high-energy, high density, high ionization level
Ion stream to be seeped, under the action of workpiece back bias voltage accelerate reach workpiece surface.By diffusion and ion bombardment effects, ion
It quickly penetrates into workpiece surface and forms infiltration layer or plating binder course in workpiece surface.It is seeped since arc-added glow plating technology has
Speed is exceedingly fast, workpiece shapes are unrestricted, can the various metals of plating and alloying element etc., between cementation coating and matrix be in typical smelting
Gold combines, junction component gradient gradual change, thus has apparent technical advantage.Meanwhile arc-added glow plating technology does not need
Additional heat source does not have any pollution to environment, belongs to green, environmental protection, energy-efficient process for treating surface.
In some embodiments, the specific steps for seeping Cr-Ni are as follows: using Cr80Ni20 alloy as target, be with argon gas
Working gas, grid bias power supply are 850~900V, are maintained at workpiece temperature between 1060-1100 DEG C；Arc 50~60A of target current,
50~60min of working time.At this point, the intensity of glow discharge sputtering is larger, ion current density is higher, active atomic concentration is high, absorbs
Rate is higher.
In some embodiments, the specific steps of Ti are plated after the first infiltration Ti are as follows: using Ti as target, ar pressure 15-
18Pa, bias mains voltage are 850~860V, are maintained at workpiece temperature between 900~950 DEG C, arc 50~60A of target current,
40~50min of working time.By increasing the air pressure of argon gas, the intensity of glow discharge sputtering and the quantity of active atomic are increased, benefit
Higher surface alloy concentration and diffuser efficiency are kept in workpiece.
In some embodiments, after forming TiCrNi gradient layer and Ti gradient layer, arc target power supply is closed, duty ratio is adjusted to 10
~12%, bias mains voltage is adjusted to 0V, and gas pressure intensity maintains 15-20Pa, gas circuit, 60~70min are closed after 30~40min
After close recirculated water, close power supply.Prepared graded metal coating structure is uniform, corrosion-resistant and good mechanical properties.
When operating distance is too far, conveying atom is big to energy needed for workpiece surface, is unfavorable for the conveying of atom, plating
Layer is thin, when operating distance is too close, although the surface for having a large amount of atom that can be splashed to workpiece, when there is also reverse sputterings for workpiece
Phenomenon has slackened the energy of ion, makes it that can not be adsorbed to matrix surface, therefore, in some embodiments, the workpiece with
The operating distance of target is 70-80mm, and ion sputtering efficiency highest, cementation coating quality are more excellent at this time.
The present invention also provides the carbon steel surface corrosion-resistants of any above-mentioned method preparation to lose graded metal coating.
The present invention also provides application of the carbon steel of the above-mentioned coating of any one in manufacture marine engineering equipment.
The beneficial effects of the present invention are:
(1) Ti/TiCrNi/CrNiFe graded metal coating prepared by the present invention not only has excellent corrosion resisting property, but also has
The generation of interfacial stress gradient and crackle is effectively reduced to effect, better reliability overcomes existing carbon steel surface plating Ti
The problem of easy spalling failure, obtains preferable protection effect.
(2) the application seeps Ti, Cr, Ni mistake in conjunction with carbon steel by the advantage and disadvantage of the existing coat preparing technology of analysis of system
Cheng Zhong, different solid-solution characteristics and diffusion feature, grope by large scale experiment, are prepared by arc-added glow plating technology
Gradient coating with excellent corrosion resistance, basal body binding force and service life, the coating gradients transition layer structure, ingredient
With the equal gradient of thermophysical property, the generation of interfacial stress gradient and crackle, reliability and corrosion resistant can be effectively reduced
Erosion is more preferable.
(3) operating method of the application it is simple, it is at low cost, have universality, be easy to large-scale production.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the carbon steel surface corrosion-resistant erosion graded metal coating preparation principle schematic diagram of embodiment 1；
Fig. 2 is the carbon steel surface corrosion-resistant erosion graded metal coating composition distribution curve of embodiment 1.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used in this application have logical with the application person of an ordinary skill in the technical field
The identical meanings understood.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Not strong for current carbon steel corrosion resistance as background technique is introduced, coating production is complicated, at high cost
The problem of.Therefore, the present invention proposes a kind of carbon steel surface corrosion-resistant erosion graded metal coating,
The carbon steel is structural carbon steel；
The graded metal coating is multi-layer compound structure, and the multi-layer compound structure surface layer is gradient function table
Layer, is the double-deck gradient transitional lay between functional layer and carbon steel surface；
The gradient function surface layer is surface Ti layers；
The double-deck gradient transitional lay is that top is TiCrNi gradient layer, and lower part is CrNiFe gradient layer.
Preferably, graded metal total coating thickness is between 113-236 μm, surface Ti layers with a thickness of 8-25 μm, TiCrNi
Thickness of Gradient Layer is 46-75 μm, and CrNiFe Thickness of Gradient Layer is 54-136 μm；
Gradient coating is one of technical advantage of the application, and the thickness of gradient coating is main and argon gas pressure, cathode
Bias, arc target current are related, and argon gas pressure is higher, cathode bias is higher, and workpiece surface temperature is higher, and arc target current is got over
Height, the ion infiltration source provided is more, and the gradient coating thickness of formation is bigger.
Preferably, surface Ti layers and TiCrNi gradient layer, TiCrNi gradient layer and CrNiFe gradient layer, CrNiFe gradient layer
It is metallurgical bonding between matrix；
Preferably, graded metal coating composition gradual change feature in gradient.
The application method is suitable for ordinary carbon steel and low-alloy steel, such as: Q235 steel, 45 steel etc..
The present invention also provides a kind of preparation methods of carbon steel surface corrosion-resistant erosion graded metal coating, comprising:
1) use carbon steel for substrate work-piece, workpiece after ultrasonic cleaning, is dried by polishing, deoiling, in acetone soln
Machine drying, is placed in plasma surface metallurgic experimental furnace, and carbon steel and target distance are in 70-80mm；
2) circulation is opened, vacuum system is opened.Equipment is evacuated to vacuum degree better than 0.1Pa；
3) high-purity argon gas is passed through in equipment to 2-3Pa, cathode bias 400-500V, duty ratio 30%-40%, scavenger
Part；
4) high-purity argon gas is passed through to 20-25Pa, cathode bias 900-950V, duty ratio 70%-80%, carbon steel work-piece temperature
Control is at 1000-1100 DEG C；
5) Cr80Ni20 target, arc target current 50-60A, working time 30-50min are opened；
6) Cr80Ni20 target is closed, high-purity argon gas is adjusted to 15-20Pa, cathode bias 850-900V, duty ratio 70%-
80%, carbon steel work-piece temperature is controlled at 850-950 DEG C；
7) Ti target, arc target current 50-60A, working time 30-40min are opened；
8) duty ratio is down to 10%, and bias mains voltage is adjusted to 0V, closes grid bias power supply, continues to be passed through argon gas, pressure
It is maintained at 15-20Pa, to avoid the oxidation of workpiece；
9) inflation system is closed after 30min, vacuum system is closed after 60min, closes circulation.
Preferably, Cr80Ni20 target described in step 5), composition proportion are Cr:Ni=80:20 (mass ratio), vacuum induction
Method of smelting preparation.
Preferably, Ti target described in step 7), purity Ti > 99.995%, the preparation of vacuum induction melting method.
Preferably, neutral salt spray corrosion test test result showed graded metal coating lacing film after 180 days, and surface is without bright
Aobvious corrosion phenomena.
A kind of carbon steel surface corrosion-resistant erosion graded metal coating, the carbon steel are structural carbon steel.
The graded metal coating is multi-layer compound structure, and the multi-layer compound structure surface layer is gradient function table
Layer, is the double-deck gradient transitional lay between functional layer and carbon steel surface.
The gradient function surface layer is surface Ti layers；
The double-deck gradient transitional lay is that top is TiCrNi gradient layer, and lower part is CrNiFe gradient layer.
Preferably,
1) graded metal total coating thickness is between 113-236 μm, surface Ti layers with a thickness of 8-25 μm, TiCrNi gradient layer
With a thickness of 46-75 μm, CrNiFe Thickness of Gradient Layer is 54-136 μm；
2) surface Ti layers and TiCrNi gradient layer, TiCrNi gradient layer and CrNiFe gradient layer, CrNiFe gradient layer and base
It is metallurgical bonding between body；
3) graded metal coating composition gradual change feature in gradient.
A kind of preparation method of carbon steel surface corrosion-resistant erosion graded metal coating, comprising:
1) use carbon steel for substrate work-piece, workpiece after ultrasonic cleaning, is dried by polishing, deoiling, in acetone soln
Machine drying, is placed in plasma surface metallurgic experimental furnace, and carbon steel and target distance are in 70-80mm；
2) circulation is opened, vacuum system is opened.Equipment is evacuated to vacuum degree better than 0.1Pa；
3) high-purity argon gas is passed through in equipment to 2-3Pa, cathode bias 400-500V, duty ratio 30%-40%, scavenger
Part；
4) high-purity argon gas is passed through to 20-25Pa, cathode bias 900-950V, duty ratio 70%-80%, carbon steel work-piece temperature
Control is at 1000-1100 DEG C；
5) Cr80Ni20 target, arc target current 50-60A, working time 30-50min are opened；
6) Cr80Ni20 target is closed, high-purity argon gas is adjusted to 15-20Pa, cathode bias 850-900V, duty ratio 70%-
80%, carbon steel work-piece temperature is controlled at 850-950 DEG C；
7) Ti target, arc target current 50-60A, working time 30-40min are opened；
8) duty ratio is down to 10%, and bias mains voltage is adjusted to 0V, closes grid bias power supply, continues to be passed through argon gas, pressure
It is maintained at 15-20Pa, to avoid the oxidation of workpiece；
9) inflation system is closed after 30min, vacuum system is closed after 60min, closes circulation.
(4) Cr80Ni20 target described in step 5), composition proportion are Cr:Ni=80:20 (mass ratio), vacuum induction melting
Method preparation.
(5) Ti target described in step 6), purity Ti > 99.995%, the preparation of vacuum induction melting method.
(6) neutral salt spray corrosion test test result showed graded metal coating lacing film after 180 days, and surface is without obvious rust
Lose phenomenon.
It is illustrated below by way of technical solution of the specific embodiment to the application.
Embodiment 1
A kind of carbon steel surface corrosion-resistant erosion graded metal coating, is prepared using arc-added glow plating technology, the specific steps are as follows:
The polishing of Q235 carbon steel work-piece surface removes oxidation film, uses acetone soln and auxiliary ultrasonic vibration is with cleaning workpiece surface oil
Then dirt is dried up with hair dryer.Workpiece is hung on the cathode of plasma surface metallurgic experimental furnace, and makes workpiece and target
Operating distance is maintained at 70mm.Start recirculated water and vacuum system, makes the pressure in equipment lower than 0.1Pa.Start inflation system,
High-purity argon gas is filled in equipment to 2Pa.Cathode bias power supply, bias voltage 450V are opened, duty ratio 30% carries out workpiece aura
Cleaning.High-purity argon gas is filled with after cleaning, in equipment to 25Pa, bias mains voltage is adjusted to 900V, protects workpiece temperature
It holds between 1060-1100 DEG C.CrNi arc target power supply is opened, arc target current 60A, working time 50min prepare CrNiFe gradient
Layer (as shown in Figure 1a).It is then shut off Cr80Ni20 alloy target power supply, high-purity argon gas pressure is adjusted to 18Pa, bias plasma in equipment
Source voltage is adjusted to 850V, is maintained at workpiece temperature between 900~950 DEG C, opens Ti target power supply, arc target current 60A, work
Time 40min prepares TiCrNi gradient layer and surface Ti layers (as shown in Figure 1 b).Arc target power supply is closed, duty ratio is adjusted to 10%,
Bias mains voltage is adjusted to 0V, and gas pressure intensity maintains 20Pa to prevent workpiece from aoxidizing, and gas circuit is closed after 30min, is closed after 60min
Closed loop water closes power supply.The overall thickness of graded metal coating is about 236 μm, and wherein surface Ti layers with a thickness of 25 μm, TiCrNi
Thickness of Gradient Layer is 75 μm, and CrNiFe Thickness of Gradient Layer is 136 μm, each ingredient gradual change feature (as shown in Figure 2) in gradient.
Embodiment 2
A kind of carbon steel surface corrosion-resistant erosion graded metal coating, is prepared using arc-added glow plating technology, the specific steps are as follows:
The polishing of Q235 carbon steel work-piece surface removes oxidation film, uses acetone soln and auxiliary ultrasonic vibration is with cleaning workpiece surface oil
Then dirt is dried up with hair dryer.Workpiece is hung on the cathode of plasma surface metallurgic experimental furnace, and makes workpiece and target
Operating distance is maintained at 80mm.Start recirculated water and vacuum system, makes the pressure in equipment lower than 0.1Pa.Start inflation system,
High-purity argon gas is filled in equipment to 2Pa.Cathode bias power supply, bias voltage 450V are opened, duty ratio 30% carries out workpiece aura
Cleaning.High-purity argon gas is filled with after cleaning, in equipment to 25Pa, bias mains voltage is adjusted to 900V, protects workpiece temperature
It holds at 1080 DEG C or so.CrNi arc target power supply is opened, arc target current 50A, working time 30min prepare CrNiFe gradient layer.So
Cr80Ni20 alloy target power supply is closed afterwards, high-purity argon gas pressure is adjusted to 18Pa in equipment, and bias mains voltage is adjusted to 850V,
It is maintained at workpiece temperature between 900~950 DEG C, opens Ti target power supply, arc target current 50A, working time 30min, preparation
TiCrNi gradient layer and surface Ti layers.Arc target power supply is closed, duty ratio is adjusted to 10%, and bias mains voltage is adjusted to 0V, gas pressure
20Pa is maintained to prevent workpiece from aoxidizing by force, gas circuit is closed after 30min, recirculated water is closed after 60min, closes power supply.Gradient gold
The overall thickness for belonging to coating is about 123 μm, and wherein surface Ti layer with a thickness of 11 μm, and TiCrNi Thickness of Gradient Layer is 50 μm, CrNiFe
Thickness of Gradient Layer is 62 μm, each ingredient gradual change feature in gradient.
Embodiment 3
A kind of carbon steel surface corrosion-resistant erosion graded metal coating, is prepared using arc-added glow plating technology, the specific steps are as follows:
The polishing of Q235 carbon steel work-piece surface removes oxidation film, uses acetone soln and auxiliary ultrasonic vibration is with cleaning workpiece surface oil
Then dirt is dried up with hair dryer.Workpiece is hung on the cathode of plasma surface metallurgic experimental furnace, and makes workpiece and target
Operating distance is maintained at 70mm.Start recirculated water and vacuum system, makes the pressure in equipment lower than 0.1Pa.Start inflation system,
High-purity argon gas is filled in equipment to 2Pa.Cathode bias power supply, bias voltage 450V are opened, duty ratio 30% carries out workpiece aura
Cleaning.High-purity argon gas is filled with after cleaning, in equipment to 22Pa, bias mains voltage is adjusted to 900V, protects workpiece temperature
It holds between 1000-1040 DEG C.CrNi arc target power supply is opened, arc target current 60A, working time 40min prepare CrNiFe gradient
Layer.Be then shut off Cr80Ni20 alloy target power supply, high-purity argon gas pressure is adjusted to 20Pa in equipment, bias mains voltage adjust to
850V is maintained at workpiece temperature between 950~980 DEG C, opens Ti target power supply, arc target current 60A, working time 40min, system
Standby TiCrNi gradient layer and surface Ti layers.Arc target power supply is closed, duty ratio is adjusted to 10%, and bias mains voltage is adjusted to 0V, gas
Pressure maintains 20Pa to prevent workpiece from aoxidizing, and gas circuit is closed after 30min, and recirculated water is closed after 60min, closes power supply.Gradient
The overall thickness of metal coating is about 214 μm, and wherein surface Ti layers with a thickness of 22 μm, and TiCrNi Thickness of Gradient Layer is 73 μm,
CrNiFe Thickness of Gradient Layer is 119 μm, each ingredient gradual change feature in gradient.
Embodiment 4
A kind of carbon steel surface corrosion-resistant erosion graded metal coating, is prepared using arc-added glow plating technology, the specific steps are as follows:
The polishing of Q235 carbon steel work-piece surface removes oxidation film, uses acetone soln and auxiliary ultrasonic vibration is with cleaning workpiece surface oil
Then dirt is dried up with hair dryer.Workpiece is hung on the cathode of plasma surface metallurgic experimental furnace, and makes workpiece and target
Operating distance is maintained at 70mm.Start recirculated water and vacuum system, makes the pressure in equipment lower than 0.1Pa.Start inflation system,
High-purity argon gas is filled in equipment to 2Pa.Cathode bias power supply, bias voltage 450V are opened, duty ratio 30% carries out workpiece aura
Cleaning.High-purity argon gas is filled with after cleaning, in equipment to 25Pa, bias mains voltage is adjusted to 900V, protects workpiece temperature
It holds between 1080-1100 DEG C.CrNi arc target power supply is opened, arc target current 50A, working time 50min prepare CrNiFe gradient
Layer.Be then shut off Cr80Ni20 alloy target power supply, high-purity argon gas pressure is adjusted to 20Pa in equipment, bias mains voltage adjust to
850V is maintained at workpiece temperature between 950~980 DEG C, opens Ti target power supply, arc target current 60A, working time 30min, system
Standby TiCrNi gradient layer and surface Ti layers.Arc target power supply is closed, duty ratio is adjusted to 10%, and bias mains voltage is adjusted to 0V, gas
Pressure maintains 20Pa to prevent workpiece from aoxidizing, and gas circuit is closed after 30min, and recirculated water is closed after 60min, closes power supply.Gradient
The overall thickness of metal coating is about 163 μm, and wherein surface Ti layers with a thickness of 16 μm, and TiCrNi Thickness of Gradient Layer is 58 μm,
CrNiFe Thickness of Gradient Layer is 89 μm, each ingredient gradual change feature in gradient.
According to national standard " artificial atmosphere corrosion test-salt spray test " (GB/T10125-1997), using salt spray test
Case carries out 180 days neutral salt spray corrosion tests, and test result showed graded metal coating lacing film after 180 days, and surface is without obvious
Corrosion phenomena, without obvious surrosion and weightlessness.
Table 1
Finally it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not limited to this hair
It is bright, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still
It can modify to technical solution documented by previous embodiment, or part is equivalently replaced.It is all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.Above-mentioned, although specific embodiments of the present invention have been described, and it is not intended to limit the protection scope of the present invention, institute
Category field technical staff should be understood that based on the technical solutions of the present invention those skilled in the art do not need to pay wound
The various modifications or changes that the property made labour can be made are still within protection scope of the present invention.
Claims (10)
1. a kind of carbon steel surface corrosion-resistant loses graded metal coating characterized by comprising
It is supported on the CrNiFe gradient layer on carbon steel surface；
The TiCrNi gradient layer being supported on Cr-NiFe gradient layer；
And it is supported on the Ti gradient layer on TiCrNi gradient layer.
2. carbon steel surface corrosion-resistant as described in claim 1 loses graded metal coating, which is characterized in that the total coating thickness is
113-236μm。
3. carbon steel surface corrosion-resistant as described in claim 1 loses graded metal coating, which is characterized in that surface Ti Thickness of Gradient Layer
It is 8-25 μm；
Or TiCrNi Thickness of Gradient Layer is 46-75 μm；
Or CrNiFe Thickness of Gradient Layer is 54-136 μm.
4. a kind of preparation method of carbon steel surface corrosion-resistant erosion graded metal coating characterized by comprising
Cr-Ni is seeped using arc-added glow plating technology on carbon steel surface, forms CrNiFe gradient coating；
Plate Ti after Ti is first seeped on CrNiFe gradient coating surface, sequentially form TiCrNi gradient layer and Ti gradient layer to get.
5. method as claimed in claim 4, which is characterized in that the specific steps for seeping Cr-Ni are as follows: with Cr80Ni20 alloy
For target, using argon gas as working gas, grid bias power supply is 850~900V, is maintained at workpiece temperature between 1060-1100 DEG C；
Arc 50~60A of target current, 50~60min of working time.
6. method as claimed in claim 4, which is characterized in that plate the specific steps of Ti after the first infiltration Ti are as follows: using Ti as target
Material, ar pressure 15-18Pa, bias mains voltage are 850~860V, are maintained at workpiece temperature between 900~950 DEG C,
Arc 50~60A of target current, 40~50min of working time.
7. method as claimed in claim 4, which is characterized in that after forming TiCrNi gradient layer and Ti gradient layer, close arc target
Power supply, duty ratio are adjusted to 10~12%, and bias mains voltage is adjusted to 0V, and gas pressure intensity maintains 15-20Pa, after 30~40min
Gas circuit is closed, recirculated water is closed after 60~70min, closes power supply.
8. method as claimed in claim 4, which is characterized in that the operating distance of the workpiece and target is 70-80mm.
9. the carbon steel surface corrosion-resistant of the described in any item method preparations of claim 4-8 loses graded metal coating.
10. the carbon steel with claim 1-3,9 described in any item coatings is manufacturing the application in marine engineering equipment.
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