CN109183115A - A kind of surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation - Google Patents
A kind of surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation Download PDFInfo
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- CN109183115A CN109183115A CN201811221262.5A CN201811221262A CN109183115A CN 109183115 A CN109183115 A CN 109183115A CN 201811221262 A CN201811221262 A CN 201811221262A CN 109183115 A CN109183115 A CN 109183115A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 66
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 title claims abstract description 33
- 238000005524 ceramic coating Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 50
- 239000003792 electrolyte Substances 0.000 claims abstract description 43
- 230000003647 oxidation Effects 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 238000011010 flushing procedure Methods 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000000654 additive Substances 0.000 claims description 16
- 230000000996 additive effect Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- CMOAHYOGLLEOGO-UHFFFAOYSA-N oxozirconium;dihydrochloride Chemical compound Cl.Cl.[Zr]=O CMOAHYOGLLEOGO-UHFFFAOYSA-N 0.000 claims description 7
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 claims description 6
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 6
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims 1
- 239000004327 boric acid Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 238000009472 formulation Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000003746 surface roughness Effects 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000001488 sodium phosphate Substances 0.000 description 3
- 229910000162 sodium phosphate Inorganic materials 0.000 description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000007743 anodising Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 235000019795 sodium metasilicate Nutrition 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000007545 Vickers hardness test Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910003158 γ-Al2O3 Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/026—Anodisation with spark discharge
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/024—Anodisation under pulsed or modulated current or potential
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses the preparation methods that a kind of surface is covered with the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation, belong to field of metal surface treatment technology.Surface of the present invention is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation comprising steps of aluminium alloy is placed in the electrolyte being contained in rustless steel container, using aluminium alloy as anode, rustless steel container is cathode, apply Bi-Directional Pulsed Voltage Technique by the differential arc oxidation pulse power, and current density and oxidization time progress oxidation reaction are controlled, until complete oxidation；Aluminium alloy is taken out later, it is dry after flushing, finally obtain the aluminium alloy that surface is covered with superhard ceramic coating formed by micro-arc oxidation.Inventive formulation science, simple process, realize the superhard characteristic of aluminium alloy revolving part surface by micro-arc oxidation film, extend the service life of aluminium alloy revolving part.
Description
Technical field
The present invention relates to the preparation methods that a kind of surface is covered with the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation, belong to metal watch
Surface treatment technical field.
Background technique
Tradition revolving part generally uses potassium steel as main material at present, potassium steel simple production process, quality be easily controllable,
Advantage of lower cost occupies important status in wear-resistant material.But the density of potassium steel is big, Energy in use is high,
Can deform processing hardening and deformation-induced martensitic transformation when by severe impact and powerful external force, furthermore its wearability
All constrain the service life of revolving part.It can be seen that needing to find a kind of novel light alloy material.
Aluminium alloy density is low, but intensity is relatively high, near or above high-quality steel；Since its plasticity is good, can be processed into various
Profile；It with excellent electric conductivity, thermal conductivity and corrosion stability, therefore is widely used in industry, usage amount is only second to steel.But
It is that aluminium alloy is insufficient compared to its surface strength of potassium steel.
Improving its surface hardness and wearability by surface Hardening Treatment becomes in recent years using aluminium alloy production revolving part
The new developing direction in field.Differential arc oxidation is a kind of special anodic oxidation, is to improve the non-ferrous metals such as aluminium alloy at this stage
One of surface hardness the most effective means.
Therefore, in view of the above-mentioned problems, the present invention is provided with the aluminium alloy that a kind of surface is covered with superhard ceramic coating formed by micro-arc oxidation
Preparation method.
Summary of the invention
The object of the present invention is to provide the preparation method that a kind of surface is covered with the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation, with
Solve the problems, such as that aluminum alloy product surface hardness is low in the prior art.
The purpose of the present invention is what is be achieved through the following technical solutions: a kind of surface is covered with superhard ceramic coating formed by micro-arc oxidation
The preparation method of aluminium alloy is sun with aluminium alloy comprising steps of aluminium alloy is placed in the electrolyte being contained in rustless steel container
Pole, rustless steel container are cathode, apply Bi-Directional Pulsed Voltage Technique by the differential arc oxidation pulse power, and control current density and oxygen
Change time progress oxidation reaction, until complete oxidation；Aluminium alloy is taken out later, it is dry after flushing, it finally obtains surface and is covered with
The aluminium alloy of superhard ceramic coating formed by micro-arc oxidation.
Further, the electrolyte includes basic electrolyte and additive, and basic electrolyte includes water and hydroxide
It is one or more of in sodium, silicate, borate and phosphate；Additive include water and zirconium oxychloride, yttrium nitrate, cerous nitrate,
One or more of butyl titanate.
Further, the concentration of basic electrolyte is 5~25g/L, and the concentration of additive is 0.5~4g/L.
Further, the pH value of electrolyte is 5~8.
Further, Bi-Directional Pulsed Voltage Technique frequency is 100~400Hz, and forward voltage amplitude is 250-400V, and pulsewidth is
0.6ms, negative voltage amplitude are 450-700V, pulsewidth 0.4ms.
Further, the current density that oxidation reaction is controlled by the differential arc oxidation pulse power is 0.5~20A/dm2。
Further, the time of oxidation reaction is 30~150min.
Further, drying condition is to spontaneously dry or dry at 80~100 DEG C.
Further, model LY11, LY12 of the aluminium alloy, LC4,2A70, ZL205, LY16,2024,5083 or
It is any in 6063.
It is covered with by the surface that the preparation method that surface is covered with the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation obtains superhard micro-
The aluminium alloy of arc oxide ceramic membrane.
The present invention has the advantage that compared with prior art
1, the amplitude of the anode pulse voltage applied will be significantly less than conventional micro-arc oxidation process and form microplasma
Critical sparking voltage required by arc discharge, but it is higher than the voltage of common anode oxidation, belong to anodic oxidation farad voltage belt.
Be conducive to form microplasma in faraday's voltage belt of general anodic oxidation in this way and generate α-Al2O3Phase transformation promotes film
Micro-structure chemical stability has feasibility, to realize the excellent wearability of aluminum alloy differential arc oxidation film and superhard.
2, the cathode pulse voltage applied will much higher than the pulse voltage that conventional micro-arc oxidation process is applied, it can be achieved that
Minimum, intermittent cathode dash current, and discharge frequency is very high.In this way, since aluminium/oxidation film/solution interface has
N-P Joint Properties and have rectified action, when Faradaic current from aoxidize become reduction current, the contact with to pole metal is that ohm connects
When touching, cathodic reduction electric current will be made to be easy to pass through, aluminium surface oxidation film can make fenestra bottom because of cathode current effect in cycles
The barrier layer in portion occurs reduction and is thinned and reduces film resistance.In terms of macroscopic perspective, cathodization pulse shock effect can reduce micro-
Discharge breakdown anode voltage occurs for plasma, oxidation current can be made to reduce, as long as the selection of cathodization pulse electrical parameter is proper,
The Jiao Erre because of film resistance generation can be effectively reduced and make interface heat since the precipitation of a large amount of hydrogen is quickly spread, to subtract
The breakdown strength and chemolysis speed of the microplasma of few aluminium surface porous oxide film, reduce the porosity of film.So that shape
At electric discharge duct spontaneously uniformity, avoid the generation or the hair that lead to local microcell macropore due to current distribution is uneven
Exhibition, so that the densification of discharge channel different zones, homogenization, so that the electric discharge of the anodizing process of different microcells is finely controllable,
Realize the rigid energy of the height of aluminum alloy differential arc oxidation film.
3, the Bi-Directional Pulsed Voltage Technique applied can also control the conversion of differential of the arc eruption strength and sintering strength, inhibit micro-
The arc light when impacting oxidation of plasma erupts phenomenon, applies energy rationally and effectively for Al2O3Inversion of phases, optimization
Two kinds of crystalline state syntrophism conversion processes.Utilize α-Al2O3Adjust the chemical stability of micro-structure, γ-Al2O3Adjust micro-structure
Architectural characteristic, control its growth distribution state, adjusting seed size size, crystal lattice orientation, different crystal phases state, can have in this way
Interaction between effect ground regulation densification ordered structure and inversion of phases, while acquisition has compactness, uniformity and stabilization
Property phase structure, be sufficiently sintered and completing to realize the microstructure of aluminum alloy differential arc oxidation film to while stablizing phase transition
It is fine controllable.
4. this method is realized by applying Bi-Directional Pulsed Voltage Technique during aluminum alloy differential arc oxidation.Technique of the invention
Simply, the superhard characteristic for realizing aluminium alloy revolving part surface by micro-arc oxidation film, extends the service life of aluminium alloy revolving part.
5. zirconium oxychloride and butyl titanate compound additive can hydrolyze to form ZrO in the solution2And TiO2Nano particle,
In micro-arc oxidation films forming process, ZrO is acted on by bipolar pulse2And TiO2Nano particle can be in aluminium oxide ceramics film layer
The middle superhard phase for forming even dispersion, and then increase substantially the hardness of ceramic film.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Differential arc oxidation be by the combination of electrolyte and corresponding electrical parameter, the metals such as aluminium, magnesium, titanium and its alloy surface according to
The TRANSIENT HIGH TEMPERATURE high pressure effect generated by arc discharge, growth in situ go out the ceramic film based on substrate metal oxide.
The faraday region that working region is aoxidized by common anode is introduced into electrion region by micro-arc oxidation process, gram
The defect for having taken hard anodizing greatly improves the comprehensive performance of film layer.Differential arc oxidation film layer is firmly combined with matrix,
Compact structure, toughness is high, has the characteristics such as good wear-resisting, corrosion-resistant, high temperature impact resistance and electrical isolation.
Aluminium alloy is acted on by electrion in the electrolytic solution, and one layer of Surface Creation is metallurgically combined with matrix
Ceramic layer based on aluminium oxide, high rigidity, high impedance and the high stability of pottery meet the anti-seawater corrosion of aluminium alloy, high warm
Lose and improve wear-resisting Deng performance requirements.The oxidation binding force of membrane is excellent, and hardness, wearability and intensity are higher.
The technology has the characteristics that easy to operate and film layer function is controllable, and simple process, and environmental pollution is small, is green
Ep-type material process for treating surface.
Surface of the invention is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation comprising steps of including step
It is rapid: aluminium alloy to be placed in the electrolyte being contained in rustless steel container, using aluminium alloy as anode, rustless steel container is cathode, is led to
It crosses the differential arc oxidation pulse power and applies Bi-Directional Pulsed Voltage Technique, and control current density and oxidization time progress oxidation reaction, directly
To complete oxidation；Aluminium alloy is taken out later, it is dry after flushing, finally obtain the aluminium that surface is covered with superhard ceramic coating formed by micro-arc oxidation
Alloy.
Preferably, the electrolyte includes basic electrolyte and additive, basic electrolyte include water and sodium hydroxide,
It is one or more of in silicate, borate and phosphate；Additive includes water and zirconium oxychloride, yttrium nitrate, cerous nitrate, metatitanic acid
One or more of four butyl esters.
Preferably, the concentration of basic electrolyte is 5~25g/L, and the concentration of additive is 0.5~4g/L；Basic electrolyte
Concentration be electrolyte quality and water volume ratio；The concentration of additive is the ratio of the quality of additive and the volume of water
Value.The pH value of electrolyte is 5~8, adjusts pH value of solution by sour (hydrochloric acid) or alkali (sodium hydroxide).
Preferably, Bi-Directional Pulsed Voltage Technique frequency is 100~400Hz, and forward voltage amplitude is 250-400V, and pulsewidth is
0.6ms, negative voltage amplitude are 450-700V, pulsewidth 0.4ms.
Preferably, the current density that oxidation reaction is controlled by the differential arc oxidation pulse power is 0.5~20A/dm2, oxygen
The time for changing reaction is 30~150min.
Preferably, drying condition is to spontaneously dry or dry at 80~100 DEG C.
Model LY11, LY12 of the aluminium alloy, LC4,2A70, appoint in ZL205, LY16,2024,5083 or 6063
One.
Embodiment 1
Material for test: LY12,100 × 100mm of size, Al alloy parts surface is placed in electrolyte as anode, stainless
Steel is as cathode.Electrolyte ratio: basic electrolyte concentration are as follows: sodium hydroxide 4.5g/L, sodium metasilicate 3.6g/L, Boratex
6.8g/L；Auxiliary additive concentration are as follows: zirconium oxychloride 0.3g/L, cerous nitrate 0.9g/l, electrolyte ph are 5~8.Using Du
IV type great power pulse power source of Er Kaote is 260Hz, forward voltage amplitude to the square wave pulse voltage frequency that circuit applies is electrolysed
For 360V, pulsewidth 0.6ms, negative voltage amplitude is 520V, pulsewidth 0.4ms；Duty ratio are as follows: positive duty ratio 10% is born
To duty ratio 10%.Current density 3A/dm2, oxidization time 80min, 25 DEG C of electrolyte temperature.
Superhard performance can be achieved in the aluminum alloy differential arc oxidation film of the embodiment, and wherein oxide thickness is according to GB/T
33826-2017 " nano film thickness measures contact pin type contourgraph method in glass substrate " is tested, oxidation film surface roughness
According to GB/T 1031-2009 " Geometry Product Specification (GPS) surface configuration method surface roughness parameter and its numerical value "
It is tested, oxidation film surface Vickers hardness is according to GB/T4340.1-1999 " Vickers Hardness Test part 1: test side
Method " it is tested.Specific index is as follows: 28~31 μm of film thickness, 0.01 μm of surface roughness Ra, and hardness Hv 1100.
Embodiment 2
Material for test: 5083,100 × 100mm of size, Al alloy parts surface is placed in electrolyte as anode, stainless
Steel is as cathode.Electrolyte ratio: basic electrolyte salinity are as follows: sodium hydroxide 2.5g/L, sodium metasilicate 4.5g/L, sodium phosphate
6g/L；Auxiliary additive concentration are as follows: zirconium oxychloride 0.1g/L, yttrium nitrate 0.2g/l, butyl titanate 0.5g/l, electrolyte pH
Value is 5~8.Use Dole examine the square wave pulse voltage frequency that special IV type great power pulse power source applies to electrolysis circuit for
270Hz, forward voltage amplitude are 350V, and pulsewidth 0.6ms, negative voltage amplitude is 580V, pulsewidth 0.4ms；Duty ratio are as follows:
Positive duty ratio 10%, negative sense duty ratio 10%.Current density 0.5-10A/dm2, oxidization time 90min, electrolyte temperature 30
℃。
Superhard performance can be achieved in the aluminum alloy differential arc oxidation film of the embodiment, and specific index is as follows: 31~33 μ of film thickness
M, 0.01 μm of surface roughness Ra, hardness Hv 1300.
Embodiment 3
Material for test: LC4,100 × 100mm of size, Al alloy parts surface are placed in electrolyte as anode, stainless steel
As cathode.Electrolyte ratio: basic electrolyte salinity are as follows: sodium hydroxide 7g/L, Boratex 6.8g/L, sodium phosphate 7.5g/
L；Auxiliary additive concentration are as follows: cerous nitrate 1.2g/l, yttrium nitrate 0.6g/l, butyl titanate 1.5g/l, electrolyte ph be 5~
8.Dole is used to examine square wave pulse voltage frequency that special IV type great power pulse power source applies to electrolysis circuit as 150Hz, forward direction
Voltage magnitude is 250V, and pulsewidth 0.6ms, negative voltage amplitude is 610V, pulsewidth 0.4ms；Duty ratio are as follows: positive duty ratio
10%, negative sense duty ratio 20%.Current density is controlled in 16A/dm2, oxidization time 100min, 35 DEG C of electrolyte temperature.
Superhard performance can be achieved in the aluminum alloy differential arc oxidation film of the embodiment, and specific index is as follows: 21~27 μ of film thickness
M, 0.01 μm of surface roughness Ra, hardness Hv 1700.
Embodiment 4
Material for test: 2A70,100 × 100mm of size, Al alloy parts surface is placed in electrolyte as anode, stainless
Steel is as cathode.Electrolyte ratio: basic electrolyte salinity are as follows: sodium hydroxide 6.8g/L, Boratex 8.2g/L, sodium phosphate
7.7g/L；Auxiliary additive concentration are as follows: zirconium oxychloride 0.6g/l, cerous nitrate 1.1g/l, yttrium nitrate 0.9g/l, butyl titanate
0.5g/l, electrolyte ph are 5~8.The square wave arteries and veins that special IV type great power pulse power source applies to electrolysis circuit is examined using Dole
Rushing electric voltage frequency is 300Hz, and forward voltage amplitude is 360V, and pulsewidth 0.6ms, negative voltage amplitude is 630V, and pulsewidth is
0.4ms；Duty ratio are as follows: positive duty ratio 10%, negative sense duty ratio 30%.Current density is controlled in 15A/dm2, oxidization time
120min, 40 DEG C of electrolyte temperature.
Superhard performance can be achieved in the aluminum alloy differential arc oxidation film of the embodiment, and specific index is as follows: 22~25 μ of film thickness
M, 0.01 μm of surface roughness Ra, hardness Hv 1950.
The present invention is cooperated by specific external electrical parameters and related mating optimization electrolyte, for the reality of application
Situation realizes the preparation of the superhard ceramic coating formed by micro-arc oxidation in aluminium alloy revolving part surface.In the differential arc oxidation of aluminum alloy surface preparation
Film main performance is as follows: 20~150 μm of film thickness, hardness Hv 1100~1950, surface roughness Ra≤0.02 μm.
The present invention is realized using super differential arc oxidation method prepares superhard ceramic coating formed by micro-arc oxidation on aluminium alloy revolving part surface.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. the preparation method that a kind of surface is covered with the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation, which is characterized in that comprising steps of
Aluminium alloy is placed in the electrolyte being contained in rustless steel container, using aluminium alloy as anode, rustless steel container is cathode, is led to
It crosses the differential arc oxidation pulse power and applies Bi-Directional Pulsed Voltage Technique, and control current density and oxidization time progress oxidation reaction, directly
To complete oxidation；
Aluminium alloy is taken out later, it is dry after flushing, finally obtain the aluminium alloy that surface is covered with superhard ceramic coating formed by micro-arc oxidation.
2. surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation according to claim 1, feature exists
In the electrolyte includes basic electrolyte and additive, and basic electrolyte includes water and sodium hydroxide, silicate, boric acid
It is one or more of in salt and phosphate；Additive include water and zirconium oxychloride, yttrium nitrate, cerous nitrate, in butyl titanate
It is one or more of.
3. surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation according to claim 2, feature exists
In the concentration of basic electrolyte is 5~25g/L, and the concentration of additive is 0.5~4g/L.
4. surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation according to claim 2, feature exists
In the pH value for adjusting electrolyte is 5~8.
5. surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation according to claim 4, feature exists
In Bi-Directional Pulsed Voltage Technique frequency is 100~400Hz, and forward voltage amplitude is 250-400V, pulsewidth 0.6ms, negative voltage
Amplitude is 450-700V, pulsewidth 0.4ms.
6. surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation according to claim 5, feature exists
In the current density for controlling oxidation reaction by the differential arc oxidation pulse power is 0.5~20A/dm2。
7. surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation according to claim 6, feature exists
In the time of oxidation reaction is 30~150min.
8. surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation according to claim 7, feature exists
In drying condition is to spontaneously dry or dry at 80~100 DEG C.
9. surface is covered with the preparation method of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation according to claim 8, feature exists
It is any in the model LY11, LY12, LC4,2A70, ZL205, LY16,2024,5083 or 6063 of, the aluminium alloy.
10. being covered with the preparation side of the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation by the described in any item surfaces claim 1-9
The surface that method obtains is covered with the aluminium alloy of superhard ceramic coating formed by micro-arc oxidation.
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| CN113089052A (en) * | 2021-03-29 | 2021-07-09 | 长安大学 | High-strength high-toughness film layer of magnesium alloy and preparation method thereof |
| CN113737242A (en) * | 2021-08-17 | 2021-12-03 | 中国科学院工程热物理研究所 | A kind of preparation method of nanometer ceramic film layer on the surface of aluminum alloy workpiece |
| CN114540914A (en) * | 2022-03-11 | 2022-05-27 | 西安理工大学 | Method for preparing megaohm-level high-impedance ceramic layer on surface of aluminum alloy in situ |
| CN115896893A (en) * | 2022-11-10 | 2023-04-04 | 南京工业大学 | Composite coating with high thermal conductivity and good insulation suitable for aluminum substrate surface and preparation method |
| CN116043305A (en) * | 2023-02-01 | 2023-05-02 | 大连大学 | Micro-arc oxidation ceramic film layer with high surface hardness and high wear resistance of vortex disc of vortex compressor and preparation method thereof |
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| CN115896893A (en) * | 2022-11-10 | 2023-04-04 | 南京工业大学 | Composite coating with high thermal conductivity and good insulation suitable for aluminum substrate surface and preparation method |
| CN116043305A (en) * | 2023-02-01 | 2023-05-02 | 大连大学 | Micro-arc oxidation ceramic film layer with high surface hardness and high wear resistance of vortex disc of vortex compressor and preparation method thereof |
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