CN106191956A - The surface treatment method of a kind of aluminium alloy and corresponding aluminium alloy - Google Patents
The surface treatment method of a kind of aluminium alloy and corresponding aluminium alloy Download PDFInfo
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- CN106191956A CN106191956A CN201610748224.XA CN201610748224A CN106191956A CN 106191956 A CN106191956 A CN 106191956A CN 201610748224 A CN201610748224 A CN 201610748224A CN 106191956 A CN106191956 A CN 106191956A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
-
- 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
- C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids
-
- 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
- C25D11/14—Producing integrally coloured layers
-
- 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
- C25D11/18—After-treatment, e.g. pore-sealing
Abstract
The application relates to the technical field of surface of aluminium alloy, specifically, relates to the surface treatment method of a kind of aluminium alloy and corresponding aluminium alloy.Described method at least comprises the following steps: step one, Al alloy parts is carried out hard anodizing；Step 2, the Al alloy parts after hard anodizing is dyeed；Step 3, to dyeing after Al alloy parts carry out sealing of hole；Step 4, the Al alloy parts after sealing of hole is carried out waxing polishing；And step 5, the Al alloy parts after waxing polishing is carried out MRF.Described method can enable aluminum alloy to surface and realize the appearance of full light glassy surface.
Description
Technical field
The application relates to the technical field of surface of aluminium alloy, specifically, relates to the surface process side of a kind of aluminium alloy
Method and corresponding aluminium alloy.
Background technology
Aluminium alloy is aoxidized under acid solution and suitable voltage, porous anodic alumina can be obtained.Its
Production technology generally comprises: mechanical polishing chemical treatment remove some alloy surface copper component clean deoil (right
In the most anodized part, anodization the most again, is to remove original anodization table with alkali or special agent
Layer) to put in dilute sulfuric acid and be energized as anode, the oxide layer generating surface porosity is (thin for white translucent
Film) dyeing fixing (heat or make the hole of surface oxide layer close with chromatedsolution).
In the sufacing of aluminum, anodic oxidation is most widely used with most successful technology, be also research and develop the most deep
With the most comprehensive technology.Anodizing of aluminium film has a series of superior performance, can meet diversified demand, therefore
It is described as a kind of omnipotent surface protection film of aluminum.Specifically, it has characteristics that 1) corrosion resistance.Aluminium anode oxide film can
Not corroded with effectively protection aluminum substrate, anode oxide film is obviously more preferable than the properties of oxide-film of self-assembling formation, thickness and sealing of hole
Quality directly affects serviceability.2) hardness and wearability.The hardness ratio aluminum substrate of aluminium anode oxide film is much higher, matrix hard
Degree is HV100, the hardness of common anode oxide-film about HV300, and hardness oxide-film can reach HV500.Wearability and hardness
Relation is consistent.3) ornamental.Aluminium anode oxide film can protect the metallic luster of polished surface, and anode oxide film can also contaminate
Normal complexion colours, it is thus achieved that and keep colourful outward appearance.4) organic coating and electrodeposited coating tack.Aluminium anode oxide film is aluminum table
Face accepts a kind of method of organic coating and electrodeposited coating, and it is effectively improved adhesive force and the corrosion resistance of surface layer.5) electric insulation
Property.Aluminum is good conductor, and aluminium anode oxide film is high-resistance dielectric film.Breakdown voltage is more than 30V/mm, special preparation
High dielectric film is even up to about 200V/mm.6) transparency.The transparency of aluminium anode oxide film own is the highest, and the purity of aluminum is the highest,
Then transparency is the highest.The transparency is all had an impact by purity and the alloying component of aluminum alloy materials.7) functional.Utilize anodic oxidation
The porous of film, deposits functional particle in micropore, can obtain various functional material.Functional part the most under development
Function has function solenoid, catalysis, sensing function and separation function etc..
Anodic oxidation is aluminum and the most frequently used process of surface treatment of aluminium alloy, but the anodized surface commonly used at present
Gloss is dumb light, it is impossible to realize the luster effect of the full light in surface.
In consideration of it, special, the application is proposed.
Summary of the invention
The primary and foremost purpose of the application is to propose the surface treatment method of a kind of aluminium alloy.
Second purpose of the application is to propose the aluminium alloy that described processing method obtains.
In order to complete the purpose of the application, the technical scheme of employing is:
A kind of surface treatment method of aluminium alloy, described method at least comprises the following steps:
Step one, Al alloy parts is carried out hard anodizing；
Step 2, the Al alloy parts after hard anodizing is dyeed；
Step 3, to dyeing after Al alloy parts carry out sealing of hole；
Step 4, the Al alloy parts after sealing of hole is carried out waxing polishing；And
Step 5, the Al alloy parts after waxing polishing is carried out MRF.
Preferably, in step one, described hard anodizing use the mix acid liquor of sulphuric acid and oxalic acid as electrolyte, its
Middle sulfuric acid concentration is 120-150g/L, and concentration of oxalic acid is 10-15g/L.
Preferably, in step 2, the voltage of described hard anodizing is 40-75V, and electric current density is 3.0-4.0A/
mm2, anodizing tank temperature is 8-11 DEG C, and the hard anodizing time is 40-70min.
Preferably, described in more than thick 25 μm of the horniness anode oxide film that obtains, more than Vickers hardness 350HV.
Preferably, in step 2, the aqueous solution of azo dye is used to dye.
Preferably, described azo dye is 1:8-10 with the mass ratio of water, and dyeing temperature is 70-80 DEG C, and dyeing time is
30-700s。
Preferably, in step 3, the aqueous solution without nickel hole sealing agent is used to carry out sealing of hole.
Preferably, the concentration of described hole sealing agent is 8-10g/L, and sealing of hole temperature is 85-100 DEG C, and the sealing of hole time is that 30-50 divides
Clock.
Preferably, in step 4, using little white beeswax is buffing wax, uses cloth wheel or blanket wheel to be polished, polishes round
Speed is 2500-3500rad/min, and polishing time is 3-5min.
Preferably, in step 5, described MRF is carried out in magnetic flow liquid, and described magnetic flow liquid is for containing being magnetic
The suspension of granule, base fluid and stabilizer.Wherein magnetic-particle is iron powder, and granularity is 1-10 μm, and iron-holder is more than 97%, effectively
Pcrmeability is more than 3；Base fluid is the mixed liquor of alkoxyl alcohol and deionized water；Stabilizer is surfactant, its selected from phosphate ester,
At least one in fatty acid, span, tween.In magnetic flow liquid, the mass fraction of alkoxyl alcohol is 30%-60%, iron powder
Mass fraction is 30%-60%, and the mass fraction of surfactant is 3%-8%, and remaining is deionized water.
Preferably, MRF rotating speed is 4500-5500rad/min, and polishing time is 3-5min.
The application further relates to the Al alloy parts that described processing method obtains.
The technical scheme of the application at least has a following beneficial effect:
The application relates to the surface treatment method of a kind of aluminium alloy, and described method uses hard anodizing, dyes, seals
Hole, the waxing processing step such as light, MRF, enable aluminum alloy to surface of the work and realize the appearance of full light glassy surface.
Detailed description of the invention
Below in conjunction with specific embodiment, the application is expanded on further.Should be understood that these embodiments are merely to illustrate the application
Rather than restriction scope of the present application.
The application relates to the surface treatment method of a kind of aluminium alloy, and the method enables aluminum alloy to surface of the work and obtains full light gloss
Appearance, effectively promote the outward appearance competitiveness of aluminum alloy material.
Specifically, described method at least comprises the following steps:
Step one, Al alloy parts (may be simply referred to as " aluminum component " afterwards) is carried out hard anodizing；
Step 2, the aluminum component after hard anodizing is dyeed；
Step 3, to dyeing after aluminum component carry out sealing of hole；
Step 4, the aluminum component after sealing of hole is carried out waxing polishing；And
Step 5, the aluminum component after waxing polishing is carried out MRF.
As a kind of improvement of the application processing method, need aluminium workpiece surface is carried out before step one mechanical pretreatment and
Anodic oxidation pre-treatment.
Wherein mechanical pretreatment is broadly divided into " mirror ultrafinish " and " sandblasting " two steps, and concrete operations mode is as follows:
Mirror ultrafinish is to be applied in by polishing fluid on soft cloth wheel, blanket wheel or polyurethane (PU) skin wheel, utilizes mechanical rotation
Make soft cloth wheel, blanket wheel or PU skin wheel friction aluminium workpiece surface, it is thus achieved that as bright as a sixpence finishing process.Specifically, minute surface grinds
Mill can be carried out on full-automatic mirror grinding machine, first carries out rough polishing by coarse and irregular surface correction molding, then carries out mirror
Face is ground, by atomic for aluminium workpiece surface little uneven polishing.Mirror ultrafinish Main Function is the numerical control knife removing aluminium workpiece surface residual
Tool processing knife mark, burr, concavo-convex, make aluminium workpiece surface obtain the surface of minute surface rank light.Mirror ultrafinish can make aluminium workpiece surface
Thinning 0.03mm.
" sandblasting " is that dry sand stream or other abrasive particles are sprayed onto aluminium workpiece surface by the compressed air using elite, thus removes surface
Defect, presents a kind of operational approach in uniformity unglazed sand face.Sandblasting primarily serve remove aluminium workpiece surface burr and
Its defect dirt, improve the effect such as Al-alloy mechanical properties.Sand grains used is generally corundum, alumina particle, zirconium oxide
Grain, bead etc..The application uses zirconia particles to carry out sandblasting, zirconia particles granularity can be selected for 120#, 150#, 170#,
205#, sandblasting atmospheric pressure is 2.5-3.0Kg.
After mechanical pretreatment completes, owing to the initial surface of aluminum component generally there are natural oxide film, greasy dirt and other pollution
Thing, therefore needed aluminium workpiece surface is carried out anodic oxidation pre-treatment before carrying out anodic oxidation.Anodic oxidation pre-treatment is main
Including following step: 1, acid defat；2, alkali cleaning；3, ash disposal neutralizes；4, ultrasonic washing；5, chemical polishing；
Wherein, the purpose of acid defat is the pollutant such as oils and fats and the dust of removing aluminium workpiece surface, makes alkali cleaning ratio below
More uniform, to improve the quality of anode oxide film.Acid defat is carried out at normal temperatures, is in the acidity as base with sulphuric acid and phosphoric acid
Carrying out defat in solution, wherein phosphoric acid content in an acidic solution is 30～40g/L, and sulphuric acid content in an acidic solution is
7～10g/L, acid degreasing time is 3～5 minutes.
The purpose of alkali cleaning is to remove the dirty of aluminium workpiece surface and natural oxide film further, to manifest pure Metal Substrate
Body, for realizing homogeneous conductive subsequently in anode oxidation process, generates uniform anode oxide film and lays good surface foundation.Alkali
Washing is to put into aluminum component to carry out etch reaction in the alkaline solution with sodium hydroxide as main constituent, and wherein sodium hydroxide is molten in alkalescence
Content in liquid is 40-55g/L, and alkali cleaning temperature is 40-50 DEG C, and the alkali cleaning time is 2-5 minute.
The purpose that ash disposal neutralizes is the impurity layer removing and remaining in aluminium workpiece surface after alkali cleaning, being mainly composed of of this impurity layer
Intermetallic compound and the alkali cleaning products thereof such as copper insoluble in alkaline solution, ferrum, silicon, to prevent them to follow-up anodizing tank
The pollution of liquid.It is to use certain density salpeter solution as in ash disposal and tank liquor that ash disposal neutralizes, and generally uses the mass fraction to be
The salpeter solution of 10%-25%, at normal temperatures dipping 1-3 minute.
The purpose of ultrasonic washing is thoroughly to remove in ash disposal and the salpeter solution of rear aluminium workpiece surface residual, general ultrasonic cleaning
Twice, every all over about 2-3 minute.
The purpose of chemical polishing is to remove the slight mold mark of aluminium workpiece surface, the friction wiped in scuffing striped, mechanical polishing
Striped, thermal transformation layer etc., make coarse surface tend to smooth and obtain the surface of approximation bright in mirror surface.Chemical polishing uses by phosphorus
Three acid chemical polishing solutions of acid, sulphuric acid and nitric acid composition, are characterized in that phosphoric acid relative amount is relatively low and sulphuric acid relative amount is higher,
Polish temperature is higher, and aluminium workpiece surface impurity can be more effectively removed in relatively conventional chemical polishing, obtains the purest brighter surface effect
Really.In three acid chemical polishing solutions, the concentration of phosphoric acid is 25-30g/L, and the concentration of sulphuric acid is 30-35g/L, and the concentration of nitric acid is 7-
10g/L, chemical polishing temperature is 90-100 DEG C, and the time is the 15-30 second.
After mechanical pretreatment and anodic oxidation pre-treatment complete, aluminum component is carried out hard anodizing.At the application
A kind of improvement of reason method, this hard anodizing is with aluminum component as anode, and graphite cake is negative electrode, with sulphuric acid and the mixing of oxalic acid
Acid is electrolyte, utilizes electrolysis to make aluminium workpiece surface form the process of porous alumina film layer.Preferably, in mix acid liquor
Sulfuric acid concentration is 120-150g/L, and concentration of oxalic acid is 10-15g/L.The voltage of hard anodizing is 40-75V, and electric current density is
3.0-4.0A/mm2, anodizing tank temperature is 8-11 DEG C, and the hard anodizing time is 40-70min.Hard anodizing
During use magnetic stirrer electrolyte.More than thick 25 μm of the horniness anode oxide film obtained, Vickers hardness 350HV.
Compared with common anode oxidation, hard anodizing can increase hardness and the thickness of the oxide-film obtained, and raw
The oxide-film adhesive force that becomes strong (oxide-film of formation has 50% infiltration inside aluminium alloy, and 50% is attached to aluminum alloy surface, in
Two-way growth), insulating properties and wearability are good.In the application, using hard anodizing is the oxidation higher in order to obtain hardness
Film layer, after carrying out follow-up anode film layer polishing, reaches full light luster effect.
As a kind of improvement of the application processing method, according to required color, the aluminum component after hard anodizing is entered
Row dyeing processes, and dyeing theory is that the physical absorption of dyestuff toner is coloured by porous Al alloy oxidation film layer, used herein
Azo dye dyes, and concrete grammar is to be mixed with the mass ratio of 1:8-10 with deionization pure water by the color of object toner of needs
Close, temperature is heated to 70-80 DEG C, then the aluminum component after hard anodizing is immersed in this azo dye solution and dye.Dye
The color time sets according to color effects, typically in the 30-700 second.Azo dye is the class that azo group two ends connect aryl
Organic compound, is fabric clothing most widely used class synthetic dyestuffs in dyeing and printing process, for multiple natural and conjunction
Become dyeing and the stamp of fiber, be also used for the coloring of paint, plastics, rubber etc..Common azo dye kind has tonyred, benzene
Amine is yellow.
As a kind of improvement of the application processing method, the aluminum component after dyeing is placed in the solution containing hole sealing agent and carries out
High temperature hole sealing processes.The purpose of sealing of hole is that hole sealing agent and hydrate are immersed to have been filled with the anodic alumina films layer of dyestuff toner
In, the hole in pellumina is carried out sealing treatment, the internal aluminium of isolation and the further reaction of other material in air.Envelope
Hole agent is broadly divided into organic sealing agent and inorganic sealing hole agent.Wherein organic sealing agent is selected from vinyl, phenolic aldehyde, modified model epoxy
Resin and polyurethane etc., mostly they be the sealing of hole for steel substrate zinc or aluminized coating, and operating temperature is the highest, is in aerial oxygen
The environment such as change, industrial atmosphere, sea water.For high-temperature oxydation medium, then with asphaltic base aluminium paste, aluminum silicone resin and some silicic acid
The inorganic sealing hole agent such as salt, chromate, maximum operating temperature is up to 980 DEG C.The Main Basis selecting hole sealing agent is residing medium
Corrosion condition and operating temperature.Owing to nickel salt sealer in early days is containing Ni2+、F-, to human body and environmental toxic evil effect, the application
Middle use is without nickel hole sealing agent.Preferably, the concentration of hole sealing agent is 8-10g/L, and sealing of hole temperature is 85-100 DEG C, and the sealing of hole time is
30-50 minute.
As a kind of improvement of the application processing method, carry out the aluminum component through hard anodizing the sealing of hole that dyes beating
Wax polishing.The purpose of waxing polishing is by hard anodic oxidation coating surface finish, tentatively obtaining the surface effect with full light gloss
Really.Buffing wax is alkalescence grinding agent, and selecting little white beeswax is buffing wax, uses cloth wheel or blanket wheel to be polished, polishes round
Speed is 2500-3500 rpm, and polishing time is 3-5 minute.
As a kind of improvement of the application processing method, the aluminum component after waxing polishing is carried out MRF.Magnetorheological
The definition of effect is: magnetic flow liquid is flowable liquid when being not added with magnetic field, and under the effect of high-intensity magnetic field, its rheological behavior
There occurs transformation drastically, show as the character of similar solid, when removing magnetic field, recover again the phenomenon of its flow behavior.Magnetorheological
Polishing technology utilizes Magnetorheologicai polishing liquid rheology occurring in gradient magnetic and formed have the viscous flexibility moulding behavior just
There is between " small abrasive nose " and workpiece quick relative motion, make surface of the work be subject to the biggest shearing force, so that workpiece table
Face obtains polishing brightness effect.
MRF it is critical only that magnetic flow liquid, it is the suspension including magnetic-particle, base fluid and stabilizer.Base
Liquid can be water or organic solvent, corresponding use stabilizer of different nature.In this application, magnetic-particle is iron powder, granularity
For 1-10 μm, its iron-holder is more than 97%, and Effective permeability is more than 3；Base fluid is the mixed liquor of alkoxyl alcohol and deionized water；Surely
Determining agent is surfactant, its at least one in phosphate ester, fatty acid, span, tween.Alkoxyl in magnetic flow liquid
The mass fraction of alcohol is 30%-60%, and the mass fraction of iron powder is 30%-60%, and the mass fraction of surfactant is 3%-
8%, remaining is deionized water.MRF rotating speed is 4500-5500rad/min, and polishing time is 3-5min.Magnetorheological throwing
Light can obtain the most smooth brighter luster effect in surface on the aluminum component after waxing polishing.
The application further relates to the Al alloy parts that described processing method obtains, and this Al alloy parts sequentially passes through hard anode
Oxidation, waxing polishing and MRF, the effect of available surface full light gloss, promote the outward appearance competitiveness of aluminium.
Embodiment 1～4
Aluminum component through mechanical pretreatment and anodic oxidation pre-treatment is carried out hard anodizing.Use sulphuric acid and oxalic acid
Mix acid liquor as electrolyte, wherein sulfuric acid concentration is 120-150g/L, and concentration of oxalic acid is 10-15g/L.Hard anodizing
Voltage be 40-75V, electric current density is 3.0-4.0A/mm2, anodizing tank temperature is 8-11 DEG C, during hard anodizing
Between be 40-70min.In embodiment 1～4, experiment parameter and the anodic oxidation film thickness of hard anodizing are as shown in table 1.
Table 1
Table 1 illustrates, anodic oxidation film thickness just became with voltage, electric current density, cell body temperature and hard anodizing time
Dependency relation.Use the scheme of the application, thickness dense anodic oxide film more than 25 μm can be obtained in aluminum alloy surface.
Next the aluminum component after hard anodizing is dyeed and sealing of hole.The aqueous solution using azo dye contaminates
Color, azo dye is 1:8-10 with the mass ratio of water, and dyeing temperature is 70-80 DEG C, and dyeing time is 30-700s.Sealing of hole uses
The aqueous solution of hole sealing agent without nickel is carried out, and the concentration of hole sealing agent is 8-10g/L, and sealing of hole temperature is 85-100 DEG C, and the sealing of hole time is 30-
50 minutes.The experiment parameter of dyeing and sealing of hole is as shown in table 2.
Table 2
After staining procedure terminates, the aluminium workpiece surface of embodiment 1～4 is the most uniformly painted.After sealing of hole step terminates, with wet
Cloth wiping aluminium material surface is without dyestuff penetration.
Next the aluminum component after sealing of hole is carried out waxing polishing.Using little white beeswax is buffing wax, uses cloth wheel or blanket wheel
Being polished, buff wheel rotating speed is 2500-3500rad/min, and polishing time is 3-5min.The experiment parameter of waxing polishing such as table
Shown in 3.
Table 3
After waxing polishing, the aluminium workpiece surface smooth finish of embodiment 1～4, tentatively present the surface effect with full light gloss
Really.
Next the aluminum component of waxing polishing is carried out MRF.Magnetic flow liquid is containing magnetic-particle, base fluid and steady
Determining the suspension of agent, wherein magnetic-particle is iron powder, and granularity is 1-10 μm, and iron-holder is more than 97%, and Effective permeability is more than 3；
Base fluid is the mixed liquor of alkoxyl alcohol and water, selects ethylene glycol monobutyl ether and the mixed liquor of deionized water in embodiment；Stabilizer
For surfactant, its at least one in phosphate ester, fatty acid, span, tween, embodiment is selected sorbester p18.?
In magnetic flow liquid, the mass fraction of alkoxyl alcohol is 30%-60%, and the mass fraction of iron powder is 30%-60%, surfactant
Mass fraction be 3%-8%, remaining is deionized water.MRF rotating speed is 4500-5500rad/min, polishing time
For 3-5min.The experiment parameter of MRF is as shown in table 4.
Table 4
After MRF terminates, the aluminium workpiece surface of embodiment 1～4 obtains the exquisitely carved sense just like glass-mirror and level
Sense, can reach the effect of full light gloss.
Comparative example 1
Aluminum component through mechanical pretreatment and anodic oxidation pre-treatment is carried out successively hard anodizing, dyes and seal
Hole, experiment parameter, with embodiment 1, carries out mirror finish, aluminium workpiece surface light, but lustrous surface is sub-aluminium workpiece surface after terminating
Light, it is impossible to realize the full light effect in surface.
Comparative example 2～5
Aluminum component through mechanical pretreatment and anodic oxidation pre-treatment is carried out anodic oxidation.Use sulphuric acid as electrolysis
Liquid, wherein sulfuric acid concentration is 150-200g/L.Anodised voltage is 11-13V, and electric current density is 0.8-1.0A/mm2, sun
Pole oxidation trough temperature is 18-22 DEG C, and anodizing time is 30-40min.Follow-up dyeing, sealing of hole, wax throwing and magnetorheological throwing
Photoreduction process is with embodiment 1.The experiment parameter of comparative example 2～5 Anodic Oxidation and anodic oxidation film thickness such as table 5 institute obtained
Show.
Table 5
After MRF terminates, the aluminium workpiece surface light of comparative example 2～5, but lustrous surface is uneven and there is part
Polishing scratch, it is impossible to realize the full light effect in surface.
Contrasted with comparative example 1 by embodiment, the surface treatment method of the aluminium alloy that the application provides, owing to adding
Wax is thrown and MRF process, can enable aluminum alloy to surface of the work and realize the appearance of full light glassy surface, effectively promotes aluminum
The outward appearance competitiveness of alloy material.Being contrasted with comparative example 2～5 by embodiment, hard anodizing process can increase many
The thickness of porous aluminum oxide film and hardness, obtain the brightest surface in follow-up polishing process.
Although the application is open as above with preferred embodiment, but is not for limiting claim.Any this area skill
Art personnel, on the premise of conceiving without departing from the application, can make some possible variations and amendment, therefore the application
Protection domain should be defined in the range of standard with claim.
Claims (10)
1. the surface treatment method of an aluminium alloy, it is characterised in that described method at least comprises the following steps:
Step one, Al alloy parts is carried out hard anodizing；
Step 2, the Al alloy parts after hard anodizing is dyeed；
Step 3, to dyeing after Al alloy parts carry out sealing of hole；
Step 4, the Al alloy parts after sealing of hole is carried out waxing polishing；And
Step 5, the Al alloy parts after waxing polishing is carried out MRF.
Method the most according to claim 1, it is characterised in that
In step one, described hard anodizing use the mix acid liquor of sulphuric acid and oxalic acid as electrolyte, wherein sulfuric acid concentration
For 120-150g/L, concentration of oxalic acid is 10-15g/L；The voltage of described hard anodizing is 40-75V, and electric current density is 3.0-
4.0A/mm2, anodizing tank temperature is 8-11 DEG C, and the hard anodizing time is 40-70min.
Method the most according to claim 1, it is characterised in that in step 2, uses the aqueous solution of azo dye to contaminate
Color；Described azo dye is 1:8-10 with the mass ratio of water, and dyeing temperature is 70-80 DEG C, and dyeing time is 30-700s.
Method the most according to claim 1, it is characterised in that in step 3, uses the aqueous solution without nickel hole sealing agent to carry out
Sealing of hole；The concentration of described hole sealing agent is 8-10g/L, and sealing of hole temperature is 85-100 DEG C, and the sealing of hole time is 30-50 minute.
Method the most according to claim 1, it is characterised in that in step 4, using little white beeswax is buffing wax, cloth wheel or hair
Bob is polished, and buff wheel rotating speed is 2500-3500rad/min, and polishing time is 3-5min.
Method the most according to claim 1, it is characterised in that in step 5, described MRF is in magnetic flow liquid
Carrying out, described magnetic flow liquid is the suspension containing magnetic-particle, base fluid and stabilizer.
Method the most according to claim 6, it is characterised in that described magnetic-particle is iron powder, granularity is 1-10 μm, iron content
Amount is more than 97%, and Effective permeability is more than 3；Described base fluid is the mixed liquor of alkoxyl alcohol and deionized water；Described stabilizer selects
At least one in phosphate ester, fatty acid, span, tween.
Method the most according to claim 7, it is characterised in that the mass fraction of alkoxyl alcohol is in described magnetic flow liquid
30%-60%, the mass fraction of iron powder is 30%-60%, and the mass fraction of surfactant is 3%-8%, remaining for go from
Sub-water.
Method the most according to claim 1, it is characterised in that in step 5, MRF rotating speed is 4500-
5500rad/min, polishing time is 3-5min.
10. the Al alloy parts that a method according to any one of claim 1 to 9 obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610748224.XA CN106191956B (en) | 2016-08-29 | 2016-08-29 | The surface treatment method and corresponding aluminium alloy of a kind of aluminium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610748224.XA CN106191956B (en) | 2016-08-29 | 2016-08-29 | The surface treatment method and corresponding aluminium alloy of a kind of aluminium alloy |
Publications (2)
| Publication Number | Publication Date |
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Cited By (12)
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| CN106868565A (en) * | 2016-12-29 | 2017-06-20 | 广东长盈精密技术有限公司 | The oxidation treatment method of 7 line aluminium alloys |
| CN107059088A (en) * | 2017-03-29 | 2017-08-18 | 深圳天珑无线科技有限公司 | Housing and preparation method thereof, electronic installation |
| CN107142510A (en) * | 2017-05-03 | 2017-09-08 | 深圳天珑无线科技有限公司 | The surface treatment method and its aluminum or aluminum alloy workpiece of a kind of aluminum or aluminum alloy |
| CN108251879A (en) * | 2018-03-01 | 2018-07-06 | 中船重工西安东仪科工集团有限公司 | The aluminum alloy part anode oxidation coloration method for sealing being used in marine environment |
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| CN109848759A (en) * | 2018-12-27 | 2019-06-07 | 苏州卡利肯新光讯科技有限公司 | A kind of process of surface treatment of aluminium alloy |
| CN110523715A (en) * | 2019-08-28 | 2019-12-03 | 中国人民解放军国防科技大学 | Method and device for ultrafast laser cleaning of surface of aluminum alloy reflector |
| CN111704840A (en) * | 2020-06-22 | 2020-09-25 | 深圳市铱讯科技有限公司 | Hole sealing method, hole sealing piece and device |
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| CN106868565A (en) * | 2016-12-29 | 2017-06-20 | 广东长盈精密技术有限公司 | The oxidation treatment method of 7 line aluminium alloys |
| CN106868565B (en) * | 2016-12-29 | 2019-05-10 | 广东长盈精密技术有限公司 | The oxidation treatment method of 7 line aluminium alloys |
| CN107059088B (en) * | 2017-03-29 | 2019-09-24 | 泉州台商投资区长芳设计有限公司 | Shell and preparation method thereof, electronic device |
| CN107059088A (en) * | 2017-03-29 | 2017-08-18 | 深圳天珑无线科技有限公司 | Housing and preparation method thereof, electronic installation |
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| CN109848759A (en) * | 2018-12-27 | 2019-06-07 | 苏州卡利肯新光讯科技有限公司 | A kind of process of surface treatment of aluminium alloy |
| CN110523715A (en) * | 2019-08-28 | 2019-12-03 | 中国人民解放军国防科技大学 | Method and device for ultrafast laser cleaning of surface of aluminum alloy reflector |
| WO2021092852A1 (en) * | 2019-11-14 | 2021-05-20 | Hewlett-Packard Development Company, L.P. | High gloss ceramic finish enclosures |
| CN111805305A (en) * | 2019-11-29 | 2020-10-23 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for machining part with deep hole chromium layer |
| CN111704840A (en) * | 2020-06-22 | 2020-09-25 | 深圳市铱讯科技有限公司 | Hole sealing method, hole sealing piece and device |
| CN111704840B (en) * | 2020-06-22 | 2022-07-15 | 深圳市铱讯科技有限公司 | Hole sealing method, hole sealing piece and device |
| CN111922646A (en) * | 2020-08-07 | 2020-11-13 | 东莞市生旺铝制品有限公司 | Aluminum alloy hanging buckle and preparation method thereof |
| CN111922646B (en) * | 2020-08-07 | 2022-04-05 | 东莞市生旺铝制品有限公司 | Integrated aluminum alloy hanging buckle with round corners at edges and preparation method thereof |
| CN113635141A (en) * | 2021-07-12 | 2021-11-12 | 劢析科学仪器(苏州)有限公司 | Method for manufacturing reflector |
| CN113635141B (en) * | 2021-07-12 | 2022-11-08 | 劢析科学仪器(苏州)有限公司 | Method for manufacturing reflector |
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