CN106191554B - A kind of generator's cover - Google Patents
A kind of generator's cover Download PDFInfo
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- CN106191554B CN106191554B CN201610512119.6A CN201610512119A CN106191554B CN 106191554 B CN106191554 B CN 106191554B CN 201610512119 A CN201610512119 A CN 201610512119A CN 106191554 B CN106191554 B CN 106191554B
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000007747 plating Methods 0.000 claims abstract description 46
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 42
- 230000032683 aging Effects 0.000 claims abstract description 19
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 33
- 239000011651 chromium Substances 0.000 claims description 33
- 238000005406 washing Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 229910052796 boron Inorganic materials 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 229910052748 manganese Inorganic materials 0.000 claims description 13
- 229910052706 scandium Inorganic materials 0.000 claims description 13
- 229910052719 titanium Inorganic materials 0.000 claims description 13
- 229910052725 zinc Inorganic materials 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 11
- 229910052727 yttrium Inorganic materials 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 8
- 238000005238 degreasing Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 238000003483 aging Methods 0.000 abstract description 16
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- 239000000956 alloy Substances 0.000 abstract description 4
- 238000009713 electroplating Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 239000011248 coating agent Substances 0.000 description 18
- 238000000576 coating method Methods 0.000 description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 239000011701 zinc Substances 0.000 description 12
- 239000010949 copper Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007714 electro crystallization reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/08—Deposition of black chromium, e.g. hexavalent chromium, CrVI
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/02—Casings or enclosures characterised by the material thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Power Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The present invention relates to a kind of generator's cover, belong to technical field of alloy material.It is Si7.5 8.8%, Mg0.25 0.4% that the generator's cover, which includes the chrome plating of body and body surface, aluminium alloy component made of aluminium alloy, Mn0.75 1.0%, Cu0.5 2.5%, Zn1.1 2.0%, Fe1.1 1.6%, Ni0.05 0.2%, Sc0.04 0.08%, Y0.005 0.025%, Ti0.05 0.25%, B0.05 0.12%, and Si/Fe：57, surplus Al, the thickness of chrome plating is 10 25 μm.Generator's cover body is made of the rational aluminium alloy of compatibility, and body increases the electroplating technology of current density one by one by point 4 steps and five stepped agings are handled, and improves hardness, intensity, wearability, the corrosion resistance of generator's cover.
Description
Technical field
The present invention relates to a kind of generator's cover, belong to technical field of alloy material.
Background technology
Generator is the plant equipment into electric energy by the energy conversion of other forms, and electric generators for automobile is the main of automobile
Power supply, its function are in normal working of engine, to all power supply for electrical equipment in addition to starter motor, while give battery
Charging；Usual generator front and back end is that drive end bearing bracket and rear end cap are assembled together, and drive end bearing bracket and rear end cap play support rotor, determined
The effect of son, rectifier and brush assembly of electric.Can the quality of generator's cover performance normal work and its service life to it
Influence it is very big.Therefore this requires generator's cover not only to have good mechanical properties and mechanical property, and has well
Heat resistance, corrosion resistance, thermal diffusivity etc..
The content of the invention
The invention aims to provide a kind of better mechanical property, wear-resistant, corrosion resistant generator's cover.
The above-mentioned purpose of the present invention can be realized by following technical proposal：A kind of generator's cover, the generator end
Lid includes the chrome plating of body and body surface, described aluminium alloy component and mass percent made of aluminium alloy
For：Si：7.5-8.8%, Mg：0.25-0.4%, Mn：0.75-1.0%, Cu：0.5-2.5%, Zn：1.1-2.0%, Fe：1.1-
1.6%, Ni：0.05-0.2%, Sc：0.04-0.08%, Y：0.005-0.025%, Ti：0.05-0.25%, B：0.05-
0.12%, and Si/Fe：5-7, surplus are Al and inevitable impurity, and the thickness of described chrome plating is 10-25 μm.
By body, to coating surface direction, its hardness number gradually rises in the chromium coating of generator's cover of the present invention, in gradient
Change, the present invention further improve the thickness control of chrome plating the bond strength of coating and body between 10-25 μm, so as to
The combination property of coating can be improved, such as wearability, corrosion resistance.And in the generator's cover of the present invention, body is common
On the basis of aluminium alloy, appropriate Sc, Y, Ti, B are added, and improves Mg, Mn content, Cu, Zn, Fe content is reduced, passes through
Caused synergy between these compositions, the generator's cover body with good mechanical property and mechanical performance is obtained,
The wearability, corrosion resistance and heat resistance of generator's cover are significantly improved, and then improves the service life of generator's cover.
In generator's cover bulk aluminum of the present invention, iron and silicon form β-FeSiAl3、Fe2Si2Al9Phase.When iron and
Silicon ratio is improper, as Si/Fe be more than 7, casting generator's cover can be caused to crack, if iron content it is too high i.e. Si/Fe be less than
5, then casting generator's cover can be made to produce fragility.Intensity of aluminum alloy improves as Mn contents increase, but its too high levels meeting
Produce frangible compounds MnA16, cracking is easily produced in following process, the present invention properly increases Mn contents and both ensures aluminium alloy
Intensity have preferable plasticity again, also improve the corrosion resistance of aluminium alloy.Because it with the addition of 0.75-1.0%'s in the present invention
Mn, Mg content can be reduced, so improving Mg content in the present invention in right amount to reinforced aluminium alloy, reduce the heat of aluminium alloy
Tendency is split, further improves the decay resistance of aluminium alloy.But Mg too high levels, otherwise pass through in the aluminium alloy of the present invention
Follow-up processing does not have invigoration effect.Present invention reduces Zn content, by making jointly with other elements, such as Mn, Cu
With improving the tensile strength, yield strength and corrosion resistance of aluminium alloy.Ti and B has the effect for enabling aluminum alloy to crystal structure refinement
Fruit, and micro crystal structure can improve the intensity of aluminium alloy, the present invention contains 0.05-0.25%Ti and 0.05- simultaneously
0.12%B can further refine the effect of crystal structure, and B can also effectively improve the intensity and extension property of aluminium alloy in addition, and
So that aluminium alloy has preferable fatigue resistance and hot property, aluminium alloy cosmetic bug is filled up.Also add in aluminium alloy of the present invention
Enter Y and scandium, refine crystal structure, aluminum alloy organization's crystal grain is gradually refined, and tensile strength and elongation gradually step up.Scandium is in aluminium
There is magnesium-yttrium-transition metal and rare earth metal this two metalloid simultaneously in alloy, can not only significantly refine cast alloy crystalline substance
Grain, recrystallization temperature is improved so as to improve the intensity of aluminium alloy and toughness, and can significantly improve the heat resistance, against corrosion of aluminium alloy
Property and heat endurance.
Preferably, described aluminium alloy component and mass percent are：Si：7.8-8.5%, Mg：0.28-
0.35%, Mn：0.8-0.92%, Cu：0.8-2.2%, Zn：1.5-1.8%, Fe：1.2-1.5%, Ni：0.08-0.15%,
Sc：0.05-0.08%, Y：0.01-0.022%, Ti：0.08-0.20%, B：0.06-0.10%, and Si/Fe：5-7, surplus are
Al and inevitable impurity.
In above-mentioned generator's cover, described chrome plating is formed by the following method：Body is carried out successively organic
Solvent oil removing, alkali cleaning oil removing, washing, acid etching, washing, preplating, washing, electrodeposited chromium, washing, Ageing Treatment form chrome plating.
Preferably, the composition and ratio of electroplate liquid during electrodeposited chromium are CrO3:150-200g/L, H2SO4:1.5-2.0g/
L, Cr3+：1.2-3.2g/L, CrO3:H2SO4=95:100-100:105.
In order to be further ensured that the uniformity of coating, in plating, anode surface will be scrubbed often, ensure well conducting.By
In in Cr-plating Bath, upper strata bubble is more, and resistance is larger, anode can be made it is upper big, under small cone, it is molten to compensate
The conductive difference of liquid levels.Frequent analysis and regulation Cr-plating Bath is also needed to ensure each component content of plating solution all optimal in plating
In the range of.Three price too high levels can cause plating solution performance to deteriorate in liquor is electroplated, and resistance increase, deposition velocity reduces,
Covering power and dispersibility decline, coating is greyish white, it is coarse can problem.
Preferably, 35-55 DEG C of operating temperature during electrodeposited chromium, cathode-anode plate relative moving speed is 8-15m/min, sun
Pole etch 10-15s, cathode-current density 50-100A/dm2, plating time 0.8-2h.
At the same temperature, rise with the increase current efficiency of current density.When at a certain temperature, current density reaches
To after certain value, current efficiency substantially constant is constant.Such as, when solution temperature is 50 DEG C, current density is less than 120A/dm2Area
Between, as current density is from 40A/dm2Increase to 120A/dm2When, corresponding current efficiency then increases to 75% from 48%, but works as
Current density is from 120A/dm2Increase to 200A/dm2When, current efficiency then increases to 75.1% change extremely unobvious from 75%.
It is less than 50A/dm in current density2, as solution temperature rises, current efficiency is decreased obviously, between 35-55 DEG C, solution temperature
Degree rises 10 DEG C, and current efficiency declines 3.1%, when temperature is more than 55 DEG C, often rises 10 DEG C, and current efficiency only declines 0.5%,
But decline unobvious in high current density section, current efficiency.Therefore, the present invention preferably current density 50-100A/dm2。
Further preferably, cathode-current density gradually rises, and is specially：Pass through 50- in 20min inner cathodes current density
60A/dm2、60-70A/dm2、70-85A/dm2、85-100A/dm24 steps are divided to increase to 100A/dm one by one2Current density.Because
Generator's cover body surface of the present invention easily forms one layer of thin and compact oxide-film in a short period of time, on this film
During chromium plating, it is difficult to obtain the coating good with parent metal adhesion, so must take it is special to method for electrically.
Still further preferably, 5 stages of the Ageing Treatment point, the treatment temperature of first stage is 160 DEG C, second stage
Treatment temperature be 170 DEG C, the treatment temperature of phase III is 180 DEG C, and the treatment temperature of fourth stage is 190 DEG C, the 5th rank
The treatment temperature of section is 200 DEG C, and the processing time per the stage is 0.5-0.8h.
Ageing Treatment can eliminate the internal stress formed between coating and matrix, improve the combination between coating and matrix
Power.It is well known that if aging temperature is too high, the hardness of workpiece can be made reduce, because the process that electrodeposited coating is formed is
The electrocrystallization process carried out at a lower temperature, the room formed in this course, interstitial atom (such as H atom) point lack
The threading defect densities such as sunken, dislocation are all very high, while intercrystalline a large amount of crystal boundaries, and existing noncrystal, can cause coating
There is very high hardness.Therefore, chromium coating of the present invention is by the Ageing Treatment in above-mentioned five stage, make the chrome plating after plating it is bright,
It is smooth, fine and closely woven, surface without peeling, come off phenomena such as, significantly improve the hardness, wearability and corrosion resistance of chrome plating.
Compared with prior art, the present invention has advantages below：
1st, the body of generator's cover of the present invention is made up of the rational aluminium alloy of compatibility, certain in body surface electroplating thickness
Chrome plating, increase substantially the combination property of generator's cover, especially improve the hardness of generator's cover, wearability and resistance to
Corrosivity.
2nd, in generator's cover of the invention, body adds appropriate Sc, Y, Ti, B on the basis of common aluminum alloy,
And Mg, Mn content are improved, Cu, Zn, Fe content are reduced, by caused synergy between these compositions, is significantly improved
Wearability, corrosion resistance and the heat resistance of generator's cover, and then improve the service life of generator's cover.
3rd, generator's cover body surface of the present invention is by electroplating suitable electroplate liquid, and it is special to method for electrically to take, and points 4
Step increases current density one by one, is handled using five stepped agings, improves coating and parent metal adhesion, further improves wear-resisting
Hardness, intensity, wearability, the corrosion resistance of axle, then improve the service life of generator's cover.
Embodiment
It is the specific embodiment of the present invention below, technical scheme is further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1
A kind of generator's cover, the generator's cover include the chromium of body and body surface made of aluminium alloy and plated
Layer, described aluminium alloy component and mass percent are：Si：8.2%, Mg：0.32%, Mn：0.86%, Cu：1.4%,
Zn：1.6%, Fe：1.3%, Ni：0.12%, Sc：0.06%, Y：0.016%, Ti：0.015%, B：0.08%, surplus Al
And inevitable impurity.The thickness of described chrome plating is 15 μm, and chrome plating is formed by the following method：Body is entered successively
Row Solvent degreasing, alkali cleaning oil removing, washing, acid etching, washing, preplating, washing, electrodeposited chromium, washing, Ageing Treatment form chromium plating
Layer.Wherein, the composition of electroplate liquid during electrodeposited chromium and ratio are CrO3:150-200g/L, H2SO4:1.5-2.0g/L, Cr3+：
1.2-3.2g/L, CrO3:H2SO4=95:100-100:105；45 DEG C of operating temperature during electrodeposited chromium, cathode-anode plate relative movement
Speed is 12m/min, anodic souring 12s, plating time 1.5h, and cathode-current density gradually rises, and is specially：In 20min
Cathode-current density passes through 50-60A/dm2、60-70A/dm2、70-85A/dm2、85-100A/dm24 steps are divided to increase to one by one
100A/dm2Current density；In 5 stages of the Ageing Treatment point, the treatment temperature of first stage is 160 DEG C, second stage
Treatment temperature is 170 DEG C, and the treatment temperature of phase III is 180 DEG C, and the treatment temperature of fourth stage is 190 DEG C, the 5th stage
Treatment temperature be 200 DEG C, be 0.5-0.8h per processing time in stage.
Embodiment 2
A kind of generator's cover, the generator's cover include the chromium of body and body surface made of aluminium alloy and plated
Layer, described aluminium alloy component and mass percent are：Si：7.8%, Mg：0.35%, Mn：0.8%, Cu：2.2%,
Zn：1.5%, Fe：1.5%, Ni：0.08%, Sc：0.08%, Y：0.01%, Ti：0.20%, B：0.06%, surplus be Al and
Inevitable impurity.The thickness of described chrome plating is 18 μm, and chrome plating is formed by the following method：Body is carried out successively
Solvent degreasing, alkali cleaning oil removing, washing, acid etching, washing, preplating, washing, electrodeposited chromium, washing, Ageing Treatment form chromium plating
Layer.Wherein, the composition of electroplate liquid during electrodeposited chromium and ratio are CrO3:150-200g/L, H2SO4:1.5-2.0g/L, Cr3+：
1.2-3.2g/L, CrO3:H2SO4=95:100-100:105；40 DEG C of operating temperature during electrodeposited chromium, cathode-anode plate relative movement
Speed is 14m/min, anodic souring 11s, plating time 1.0h, and cathode-current density gradually rises, and is specially：In 20min
Cathode-current density passes through 50-60A/dm2、60-70A/dm2、70-85A/dm2、85-100A/dm24 steps are divided to increase to one by one
100A/dm2Current density；In 5 stages of the Ageing Treatment point, the treatment temperature of first stage is 160 DEG C, second stage
Treatment temperature is 170 DEG C, and the treatment temperature of phase III is 180 DEG C, and the treatment temperature of fourth stage is 190 DEG C, the 5th stage
Treatment temperature be 200 DEG C, be 0.5-0.8h per processing time in stage.
Embodiment 3
A kind of generator's cover, the generator's cover include the chromium of body and body surface made of aluminium alloy and plated
Layer, described aluminium alloy component and mass percent are：Si：8.5%, Mg：0.28%, Mn：0.92%, Cu：0.8%,
Zn：1.8%, Fe：1.5%, Ni：0.15%, Sc：0.05%, Y：0.022%, Ti：0.08%, B：0.10%, surplus be Al and
Inevitable impurity.The thickness of described chrome plating is 20 μm, and chrome plating is formed by the following method：Body is carried out successively
Solvent degreasing, alkali cleaning oil removing, washing, acid etching, washing, preplating, washing, electrodeposited chromium, washing, Ageing Treatment form chromium plating
Layer.Wherein, the composition of electroplate liquid during electrodeposited chromium and ratio are CrO3:150-200g/L, H2SO4:1.5-2.0g/L, Cr3+：
1.2-3.2g/L, CrO3:H2SO4=95:100-100:105；50 DEG C of operating temperature during electrodeposited chromium, cathode-anode plate relative movement
Speed is 9m/min, anodic souring 14s, plating time 1.6h, and cathode-current density gradually rises, and is specially：It is cloudy in 20min
Electrode current density passes through 50-60A/dm2、60-70A/dm2、70-85A/dm2、85-100A/dm24 steps are divided to increase to 100A/ one by one
dm2Current density；In 5 stages of the Ageing Treatment point, the treatment temperature of first stage is 160 DEG C, the processing of second stage
Temperature is 170 DEG C, and the treatment temperature of phase III is 180 DEG C, and the treatment temperature of fourth stage is 190 DEG C, the place in the 5th stage
It is 200 DEG C to manage temperature, and the processing time per the stage is 0.5-0.8h.
Embodiment 4
A kind of generator's cover, the generator's cover include the chromium of body and body surface made of aluminium alloy and plated
Layer, described aluminium alloy component and mass percent are：Si：7.5%, Mg：0.4%, Mn：0.75%, Cu：2.5%,
Zn：1.1%, Fe：1.2%, Ni：0.05%, Sc：0.08%, Y：0.005%, Ti：0.25%, B：0.05%, surplus be Al and
Inevitable impurity.The thickness of described chrome plating is 10 μm, and chrome plating is formed by the following method：Body is carried out successively
Solvent degreasing, alkali cleaning oil removing, washing, acid etching, washing, preplating, washing, electrodeposited chromium, washing, Ageing Treatment form chromium plating
Layer.Wherein, the composition of electroplate liquid during electrodeposited chromium and ratio are CrO3:150-200g/L, H2SO4:1.5-2.0g/L, Cr3+：
1.2-3.2g/L, CrO3:H2SO4=95:100-100:105；35 DEG C of operating temperature during electrodeposited chromium, cathode-anode plate relative movement
Speed is 8m/min, anodic souring 15s, plating time 2h, and cathode-current density gradually rises, and is specially：In 20min inner cathodes
Current density passes through 50-60A/dm2、60-70A/dm2、70-85A/dm2、85-100A/dm24 steps are divided to increase to 100A/dm one by one2
Current density；In 5 stages of the Ageing Treatment point, the treatment temperature of first stage is 160 DEG C, the treatment temperature of second stage
For 170 DEG C, the treatment temperature of phase III is 180 DEG C, and the treatment temperature of fourth stage is 190 DEG C, the processing temperature in the 5th stage
Spend for 200 DEG C, the processing time per the stage is 0.5-0.8h.
Embodiment 5
A kind of generator's cover, the generator's cover include the chromium of body and body surface made of aluminium alloy and plated
Layer, described aluminium alloy component and mass percent are：Si：8.8%, Mg：0.25%, Mn：1.0%, Cu：0.5%,
Zn：2.0%, Fe：1.6%, Ni：0.2%, Sc：0.04%, Y：0.025%, Ti：0.05%, B：0.12%, surplus be Al and
Inevitable impurity.The thickness of described chrome plating is 25 μm, and chrome plating is formed by the following method：Body is carried out successively
Solvent degreasing, alkali cleaning oil removing, washing, acid etching, washing, preplating, washing, electrodeposited chromium, washing, Ageing Treatment form chromium plating
Layer.Wherein, the composition of electroplate liquid during electrodeposited chromium and ratio are CrO3:150-200g/L, H2SO4:1.5-2.0g/L, Cr3+：
1.2-3.2g/L, CrO3:H2SO4=95:100-100:105；55 DEG C of operating temperature during electrodeposited chromium, cathode-anode plate relative movement
Speed is 15m/min, anodic souring 10s, plating time 0.8h, and cathode-current density gradually rises, and is specially：In 20min
Cathode-current density passes through 50-60A/dm2、60-70A/dm2、70-85A/dm2、85-100A/dm24 steps are divided to increase to one by one
100A/dm2Current density；In 5 stages of the Ageing Treatment point, the treatment temperature of first stage is 160 DEG C, second stage
Treatment temperature is 170 DEG C, and the treatment temperature of phase III is 180 DEG C, and the treatment temperature of fourth stage is 190 DEG C, the 5th stage
Treatment temperature be 200 DEG C, be 0.5-0.8h per processing time in stage.
Comparative example 1
Common common generator's cover in the prior art.
Comparative example 2
The generator's cover made of aluminium alloy as described in Example 1, but surface is without coating.
Comparative example 3
Generator's cover body is made with aluminium alloy common in the prior art, is existed with method as described in example 1 above
Body surface forms coating, identical in processing method such as embodiment 1, is not repeated herein.
The techniques such as Solvent degreasing, alkali cleaning oil removing, acid etching, preplating described in above-described embodiment are except special instruction
, common process essentially of the prior art, as preplating includes leaching zinc, zinc-plated processing, second leaching zinc, preplating for the first time
The common process such as copper, nickel plating.
Generator's cover made of embodiment 1-5 and comparative example 1-3 is tested, hardness, wear extent, adhesion and
Corrosion proof test result is as shown in table 1.
Load added by hardness test is 9.8N, load time 10s, is as a result the average value of 5 determination datas.
Adhesion：The 5-6 bars parallel lines away from 1mm to each other are marked on generator's cover sample surfaces, as deep as matrix gold
Category, then the 5-6 bars parallel lines vertical with this are marked, check for coating peeling, peeling phenomenon in straight line infall.
Corrosion resistance：Generator's cover sample is placed in salt spray test chamber with a vertical 15-30 DEG C of angle, temperature is
35 ± 1 DEG C, humidity is more than 95.With the 5% brine sparge 24h that pH value is 6.5, stop 48h, take out and carry out visual examination, see sample
Whether corrosion phenomenon is whether there is, and whether quality of coating reaches corrosion-resistant standard.
Table 1：Embodiment 1-5 and comparative example 1-3 generator's cover the performance test results
In summary, generator's cover body of the present invention is made up of the rational aluminium alloy of compatibility, passes through electricity in body surface
Plate suitable electroplate liquid, the chrome plating after plating is bright, smooth, fine and closely woven, surface without peeling, come off phenomena such as, significantly improve chromium
The hardness of coating, and then improve hardness, wearability, the corrosion resistance of generator's cover.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but simultaneously
Do not deviate by the spirit of the present invention or surmount scope defined in appended claims.
It is skilled to this area although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (4)
1. a kind of generator's cover, it is characterised in that the generator's cover includes body and this body surface made of aluminium alloy
The chrome plating in face, described aluminium alloy component and mass percent are：Si：7.5-8.8%, Mg：0.25-0.4%, Mn：
0.75-1.0%, Cu：0.5-2.5%, Zn：1.1-2.0%, Fe：1.1-1.6%, Ni：0.05-0.2%, Sc：0.04-
0.08%, Y：0.005-0.025%, Ti：0.05-0.25%, B：0.05-0.12%, and Si/Fe：5-7, surplus is for Al and not
Evitable impurity, the thickness of described chrome plating is 10-25 μm.
2. generator's cover according to claim 1, it is characterised in that described aluminium alloy component and quality percentage
Than for：Si：7.8-8.5%, Mg：0.28-0.35%, Mn：0.8-0.92%, Cu：0.8-2.2%, Zn：1.5-1.8%, Fe：
1.2-1.5%, Ni：0.08-0.15%, Sc：0.05-0.08%, Y：0.01-0.022%, Ti：0.08-0.20%, B：0.06-
0.10%, and Si/Fe：5-7, surplus are Al and inevitable impurity.
3. generator's cover according to claim 1 or 2, it is characterised in that described chrome plating shape by the following method
Into：Body is carried out successively Solvent degreasing, alkali cleaning oil removing, washing, acid etching, washing, preplating, washing, electrodeposited chromium, washing,
Ageing Treatment forms chrome plating.
4. generator's cover according to claim 3, it is characterised in that 5 stages of the Ageing Treatment point, first stage
Treatment temperature be 160 DEG C, the treatment temperature of second stage is 170 DEG C, and the treatment temperature of phase III is 180 DEG C, fourth order
The treatment temperature of section is 190 DEG C, and the treatment temperature in the 5th stage is 200 DEG C, and the processing time per the stage is 0.5-0.8h.
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| IT201700065300A1 (en) * | 2017-06-13 | 2018-12-13 | Carpanelli Motori Elett S P A | ELECTRIC MOTOR. |
| CN111893353B (en) * | 2020-08-10 | 2021-07-06 | 广东省材料与加工研究所 | High-strength heat-resistant aluminum alloy material and preparation method thereof |
| CN111945087B (en) * | 2020-09-02 | 2022-04-19 | 盐城工业职业技术学院 | Processing heat treatment process of aluminum alloy extruded section |
| CN112542912B (en) * | 2020-12-22 | 2021-10-15 | 石狮市星盛五金制品有限公司 | Motor end cover and preparation process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108461A (en) * | 2009-12-23 | 2011-06-29 | 贵阳广航铸造有限公司 | Aluminum die-casting alloy suitable for anodic oxidation treatment and preparation method thereof |
| CN103526084A (en) * | 2013-09-29 | 2014-01-22 | 宁波东浩铸业有限公司 | Silicone oil clutch and making method thereof |
| CN104498782A (en) * | 2015-01-04 | 2015-04-08 | 宁波东浩铸业有限公司 | Automobile generator end cover and preparation method thereof |
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| US7666353B2 (en) * | 2003-05-02 | 2010-02-23 | Brunswick Corp | Aluminum-silicon alloy having reduced microporosity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108461A (en) * | 2009-12-23 | 2011-06-29 | 贵阳广航铸造有限公司 | Aluminum die-casting alloy suitable for anodic oxidation treatment and preparation method thereof |
| CN103526084A (en) * | 2013-09-29 | 2014-01-22 | 宁波东浩铸业有限公司 | Silicone oil clutch and making method thereof |
| CN104498782A (en) * | 2015-01-04 | 2015-04-08 | 宁波东浩铸业有限公司 | Automobile generator end cover and preparation method thereof |
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Denomination of invention: A generator end cover Effective date of registration: 20231123 Granted publication date: 20171201 Pledgee: Ningbo Yinzhou Rural Commercial Bank Co.,Ltd. Dongwu sub branch Pledgor: NINGBO DONGHAO DIE-CASTING Co.,Ltd. Registration number: Y2023330002769 |