CN115679139A - High-strength aluminum alloy plate for sheet metal process and preparation method thereof - Google Patents
High-strength aluminum alloy plate for sheet metal process and preparation method thereof Download PDFInfo
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- CN115679139A CN115679139A CN202211319882.9A CN202211319882A CN115679139A CN 115679139 A CN115679139 A CN 115679139A CN 202211319882 A CN202211319882 A CN 202211319882A CN 115679139 A CN115679139 A CN 115679139A
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- silica sol
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 34
- 239000002184 metal Substances 0.000 title claims abstract description 34
- 230000008569 process Effects 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 30
- 230000003647 oxidation Effects 0.000 claims abstract description 28
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 28
- 238000007670 refining Methods 0.000 claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- DJPURDPSZFLWGC-UHFFFAOYSA-N alumanylidyneborane Chemical compound [Al]#B DJPURDPSZFLWGC-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003792 electrolyte Substances 0.000 claims abstract description 18
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 14
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 14
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 13
- 239000003607 modifier Substances 0.000 claims abstract description 13
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 13
- 238000001354 calcination Methods 0.000 claims abstract description 12
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 10
- 238000004108 freeze drying Methods 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 6
- 239000008367 deionised water Substances 0.000 claims description 30
- 229910021641 deionized water Inorganic materials 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 230000032683 aging Effects 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 20
- 239000006104 solid solution Substances 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 229920000858 Cyclodextrin Polymers 0.000 claims description 14
- 239000001116 FEMA 4028 Substances 0.000 claims description 14
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims description 14
- 235000011175 beta-cyclodextrine Nutrition 0.000 claims description 14
- 229960004853 betadex Drugs 0.000 claims description 14
- 239000002120 nanofilm Substances 0.000 claims description 13
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 12
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 12
- 239000002518 antifoaming agent Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 11
- 229920002635 polyurethane Polymers 0.000 claims description 11
- 239000004814 polyurethane Substances 0.000 claims description 11
- 229910000077 silane Inorganic materials 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000012452 mother liquor Substances 0.000 claims description 10
- 238000009987 spinning Methods 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 8
- 229910000542 Sc alloy Inorganic materials 0.000 claims description 7
- LUKDNTKUBVKBMZ-UHFFFAOYSA-N aluminum scandium Chemical compound [Al].[Sc] LUKDNTKUBVKBMZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 claims description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- 239000002585 base Substances 0.000 claims description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004327 boric acid Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 238000007710 freezing Methods 0.000 claims description 5
- 230000008014 freezing Effects 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 238000003837 high-temperature calcination Methods 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 5
- 239000010413 mother solution Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 229910052706 scandium Inorganic materials 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 239000002121 nanofiber Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
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- 230000000052 comparative effect Effects 0.000 description 15
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000000956 alloy Substances 0.000 description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 230000005496 eutectics Effects 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 9
- 229910021389 graphene Inorganic materials 0.000 description 7
- 239000010407 anodic oxide Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- NHBRUUFBSBSTHM-UHFFFAOYSA-N n'-[2-(3-trimethoxysilylpropylamino)ethyl]ethane-1,2-diamine Chemical group CO[Si](OC)(OC)CCCNCCNCCN NHBRUUFBSBSTHM-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000033444 hydroxylation Effects 0.000 description 3
- 238000005805 hydroxylation reaction Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 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 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
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- -1 hydroxyl graphene Chemical compound 0.000 description 2
- 230000000640 hydroxylating effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- PXGZUMCOTGAVEC-UHFFFAOYSA-N 3-[dimethoxy(penta-1,4-dien-3-yloxy)silyl]propane-1,1,1-triamine Chemical compound C(=C)C(O[Si](OC)(OC)CCC(N)(N)N)C=C PXGZUMCOTGAVEC-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 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
- 230000009471 action Effects 0.000 description 1
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- 238000010892 electric spark Methods 0.000 description 1
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
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Landscapes
- Laminated Bodies (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to the technical field of aluminum alloy, in particular to a high-strength aluminum alloy plate for a sheet metal process and a preparation method thereof; adopting Sc and Te to jointly modify, and controlling the mass ratio of Sc to Te and the introduction amount of a modifier; the refining agent is an environment-friendly smokeless type refining agent; the aluminum alloy plate is subjected to anodic oxidation and then hole sealing, so that the corrosion resistance of the aluminum alloy plate is improved, the appearance of the aluminum alloy plate is beautified, and the service life of the aluminum alloy plate is prolonged; sodium hydroxide and sodium silicate are used as an anodic oxidation electrolyte, and polyacrylic acid is added into the anodic oxidation electrolyte; the method comprises the steps of introducing hydroxylated graphene and modified silica sol into hole sealing liquid, taking polyvinyl alcohol as a construction element of an electrostatic spinning silica nanofiber membrane, taking aluminum boron silica sol as an adhesive, assembling by combining a sol dipping-layer-by-layer stacking method to obtain a framework three-dimensional structure with a layered characteristic, and performing freeze drying and calcining treatment to obtain the modified silica sol with high-strength and super-elasticity characteristics.
Description
Technical Field
The invention relates to the technical field of aluminum alloy, in particular to a high-strength aluminum alloy plate for a sheet metal process and a preparation method thereof.
Background
Sheet metal with the characteristics of conductivity, low cost, easy large-scale mass production and the like is widely applied to the fields of electronic communication, automobiles, apparatuses and the like, for example, the sheet metal is a necessary component part in a computer mobile phone, and the sheet metal process generally refers to a cold processing process for a metal sheet with the thickness of less than 6 mm. Generally, four important steps of sheet metal working are shearing, punching/cutting, folding/rolling, welding and surface treatment.
The aluminum alloy plate prevents parts from rusting through surface treatment, beautifies the appearance of the product, and plays a role in prolonging the service life of the parts and the like. The post-treatment mainly comprises paint spraying, plastic spraying, antirust layer plating and the like. With the expansion of the application range of the sheet metal, people put forward higher requirements on the aluminum alloy sheet used in the sheet metal process.
Disclosure of Invention
The invention aims to provide a high-strength aluminum alloy plate for a sheet metal process and a preparation method thereof, and aims to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
a preparation method of a high-strength aluminum alloy plate for a sheet metal process comprises the following steps:
s1: taking ZL114A as an aluminum alloy plate base material, adding a modifier at 715-720 ℃ and stirring;
s2: heating to 720-730 ℃, adding a refining agent, keeping the temperature for 15-20min, standing for 30-40min, and pouring under differential pressure to obtain a molded aluminum alloy plate;
s3: carrying out solid solution aging treatment on the formed aluminum alloy plate, and grinding and polishing to obtain an aluminum alloy plate body;
s4: firstly, putting an aluminum alloy plate body into electrolyte for anodic oxidation;
s5: preparing hole sealing liquid by using hydroxylated graphene, beta-cyclodextrin, modified silica sol, polyamino silane, waterborne polyurethane, a defoaming agent and deionized water;
s6: and (3) immersing the aluminum alloy plate body subjected to anodic oxidation into hole sealing liquid for hole sealing, draining, blowing by using high-pressure air, and drying to obtain the high-strength aluminum alloy plate for the sheet metal process.
The ZL114A alloy has the advantages of small specific gravity, high specific stiffness, high specific strength, excellent casting performance and the like, so that the ZL114A alloy is used as a base material of a high-strength aluminum alloy plate for a sheet metal process in the invention, but the ZL114A alloy has high silicon content, and the performance of the alloy performance is restricted by flaky eutectic silicon, so that the appearance of eutectic silicon is changed by modification treatment of the ZL114A alloy, and the mechanical property of the alloy is improved.
In the prior industrial production, the sodium salt modification and the strontium modification are commonly adopted to improve the performance of the ZL114A alloy, but the sodium salt modification is short-acting modification, while the strontium modification is long-acting modification but has large air suction tendency and can influence the overall performance of the alloy, and the Sc and Te are jointly modified to improve the performance of the ZL114A alloy.
Further, the modifier is obtained by compounding aluminum scandium alloy and aluminum telluride, wherein the mass ratio of Sc elements to Te elements is 1.5:1, wherein the mass ratio of Sc element to the formed aluminum alloy plate is 0.2-0.4%.
By controlling the mass ratio of Sc to Te and the introduction amount of the modifier, the mechanical property of the aluminum alloy is greatly improved on the basis of refining eutectic silicon. In the process of Sc and Te deterioration, sc can form a heterogeneous nucleation core of eutectic silicon in the aluminum melt, the sensitivity of the mechanical property of the ZL114A alloy to the cooling speed is reduced, particularly, the elongation of the ZL114A alloy is greatly improved under the condition of low cooling speed, secondary and tertiary dendrites of the ZL114A alloy can be degraded by adding Sc, and an eutectic Si phase is in a fine fibrous shape. Te is used for preventing the lateral growth of Si, enriching the front edge of the Si phase and selectively adsorbing to enable the growth of the eutectic silicon to generate branches, thereby refining the eutectic silicon.
Furthermore, the refining agent is an environment-friendly refining agent, and the mass ratio of the refining agent to the formed aluminum alloy plate is 0.05-0.09%.
According to the invention, the aluminum alloy plate is subjected to anodic oxidation and then hole sealing, so that the corrosion resistance of the aluminum alloy plate is improved, the appearance of the aluminum alloy plate is beautified, and the service life of parts is prolonged.
Further, the working conditions of the anodic oxidation are as follows: the time is 10-15min, the temperature is 30-35 ℃, and the current density is 15mA/cm2; the electrolyte used for anodic oxidation is: deionized water is used as a solvent, wherein the concentration of sodium hydroxide is 36g/L, the concentration of sodium silicate is 102g/L, the concentration of terephthalic acid is 2.4g/L, and the concentration of polyacrylic acid is 6mL/L.
According to the invention, sodium hydroxide and sodium silicate are used as the electrolyte for anodic oxidation, and polyacrylic acid is added into the electrolyte, so that the number of holes in an anodic oxidation film is reduced, the distribution of micropores is more uniform, and the film layer is smoother. Because the polyacrylic acid has good arc suppression capability, destructive electric sparks can be effectively suppressed, the number of micropores in an oxide film is reduced, and the condition of coherent holes is eliminated; in addition, polyacrylic acid is added into the electrolyte, the film forming voltage can be increased, the fluidity of the melt is increased due to the increase of the temperature, the number of micropores is reduced, the pore diameter is reduced, and the film layer is smoother.
Further, the hole sealing liquid comprises the following components in parts by weight: 0.05-0.1 part of hydroxylated graphene, 2-5 parts of beta-cyclodextrin, 4-10 parts of modified silica sol, 1-3 parts of polyaminosilane, 25-35 parts of waterborne polyurethane, 0.5-1 part of defoaming agent and 1-5 parts of deionized water.
Furthermore, the polyamino silane is diethylenetriaminopropyltrimethoxysilane, the smoothness of the surface of the film formed after hole sealing can be improved by adding the diethylenetriaminopropyltrimethoxysilane into the hole sealing liquid, the number of cracks and residual discharge micropores after hole sealing is effectively reduced, and the bonding force between the sealing liquid and the anodic oxide film is effectively improved through the synergistic effect of the polyamino silane and the beta-cyclodextrin.
Due to the fact that the hydroxylated graphene is introduced into the hole sealing liquid, the ultra-large specific surface area of the hydroxylated graphene can effectively block corrosive media, and therefore corrosion of the aluminum alloy can be effectively delayed. And the hydroxyl on the surface of the hydroxyl graphene, the hydroxyl on the surface of the nano silicon dioxide in the modified silicon dioxide sol and the hydroxyl in the polyamino silane can be subjected to dehydration condensation reaction, so that the strength of the sealing film is greatly improved. The hydroxylation graphene has oxidizability and a secondary passivation effect on the aluminum alloy, so that the anode oxide film has self-repairability, and the hydroxylation graphene has good permeability and can repair defects in the aluminum alloy anode oxide film. The wear resistance and scratch resistance of the aluminum alloy anode oxide film can be improved by using the hydroxyl graphene.
Further, the working conditions of differential pressure casting are as follows: pouring temperature is 695-715 ℃, liquid rising rate is 35-45mm/s, mold filling rate is 45-55mm/s, pressure maintaining differential pressure is 80-95kPa, and pressure maintaining time is 4-8min; the working conditions of the solution aging treatment are as follows: the solid solution temperature is set to be 535-545 ℃, the solid solution time is 16-20h, the aging temperature is 165-175 ℃, and the aging heat preservation time is 5-7h.
Further, the working conditions of drying are as follows: drying for 10-15min at 80-100 ℃, wherein the working conditions of hole sealing are as follows: the pH is 8-8.5, the temperature is 25-30 deg.C, and the immersion time is 30-45s.
Further, the preparation of the modified silica sol comprises the following steps:
1) Mixing aluminum chloride, boric acid, ethyl orthosilicate and deionized water, stirring for 4 hours to obtain an aluminum boron silica sol mother liquor, and adding the deionized water to prepare the aluminum boron silica sol mother liquor with the concentration of 0.5-1 wt%;
2) Mixing deionized water and polyvinyl alcohol, adding silica sol, stirring to obtain a polyvinyl alcohol spinning solution, and performing electrostatic spinning to obtain a pretreatment membrane;
3) Drying the pretreatment film and then calcining to obtain a flexible ceramic nano film;
4) Equally cutting the flexible ceramic nano-film into pieces, sequentially putting the pieces into an aluminum boron silica sol mother solution with the concentration of 0.5-1wt% for soaking for 20-30min, sequentially taking out the pieces, stacking the flexible ceramic nano-film layer by layer, performing quick freezing on the stacked layered blocks by using liquid nitrogen, performing freeze-drying treatment for 30h, and calcining at high temperature to obtain the modified silica sol.
According to the invention, the silicon dioxide sol is introduced, the strength of a sealing membrane is improved while the high-temperature resistance of the aluminum alloy is improved by the synergistic hydroxylation of graphene, but the application of the existing silicon dioxide sol is generally limited by the defects of large brittleness, easy collapse of the structure under the action of external force, insufficient mechanical properties and the like. The obtained modified silica sol has a special interlayer structure and an effective bonding network, so that the compression resilience and high temperature resistance of the surface of the aluminum alloy are improved.
Further, the working conditions of electrostatic spinning are as follows: the spinning voltage is 10kV, the receiving distance is 20cm, the advancing speed is 0.5mL/h, and the electrostatic spinning time is 1h.
Further, the working conditions of 3) the calcination treatment are as follows: heating to 205 deg.C, keeping the temperature for 25min, and heating to 790 deg.C at 5 deg.C/min; 4) The working conditions of the high-temperature calcination are as follows: heating to 890 deg.C at 5 deg.C/min, and maintaining for 40-50min.
The invention has the beneficial effects that:
the invention provides a high-strength aluminum alloy plate for a sheet metal process and a preparation method thereof, and the high-strength aluminum alloy plate with high heat resistance, high strength and good corrosion resistance is prepared and used as the high-strength aluminum alloy plate for the sheet metal process.
The performance of the ZL114A alloy is improved by adopting the combined modification of Sc and Te; by controlling the mass ratio of Sc to Te and the introduction amount of a modifier, the mechanical property of the aluminum alloy is greatly improved on the basis of refining eutectic silicon.
The refining agent is an environment-friendly smokeless type refining agent, has no adverse effect on human bodies, equipment and environment, has strong capability of removing gas and impurities, can obviously reduce the existence degree of impurities and pinholes in castings, does not contain fluorine, sodium and calcium elements, can remove sodium and calcium elements in a proper amount, and has better slag aluminum separability.
The aluminum alloy plate is subjected to anodic oxidation and then hole sealing, so that the corrosion resistance of the aluminum alloy plate is improved, the appearance of the aluminum alloy plate is beautified, and the service life of parts is prolonged. Sodium hydroxide and sodium silicate are used as the electrolyte for anodic oxidation, polyacrylic acid is added into the electrolyte, the number of holes in an anodic oxidation film is reduced, the distribution of micropores is more uniform, and a film layer is smoother.
The hydroxylated graphene is introduced into the hole sealing liquid, so that the strength, the wear resistance and the scratch resistance of the sealing film are greatly improved, and the corrosion of the aluminum alloy is effectively delayed. And the oxidability of the hydroxylated graphene has a secondary passivation effect on the aluminum alloy, so that the anodic oxide film has self-repairability.
The preparation method comprises the steps of introducing silica sol, improving the strength of a sealing film while synergistically hydroxylating graphene, improving the high-temperature resistance of aluminum alloy, assembling a three-dimensional skeleton structure with the layered characteristic by taking polyvinyl alcohol as a construction element of an electrostatic spinning silica nanofiber film and taking aluminum boron silica sol as an adhesive in combination with a sol dipping-layer-by-layer stacking method, and obtaining the layered silica gel with high-strength and super-elasticity characteristics through freeze drying and calcining. The obtained modified silica sol has a special interlayer structure and an effective bonding network, so that the compression resilience and high temperature resistance of the surface of the aluminum alloy are improved.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if the present invention is embodied in relation to directional indications such as up, down, left, right, front, rear, \8230; \8230, the directional indications are merely used to explain the relative positional relationship between the components, the motion situation, etc. in a particular posture, if the particular posture is changed, the directional indications are changed accordingly. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The technical solutions of the present invention are further described in detail with reference to specific examples, which should be understood that the following examples are only illustrative of the present invention and are not intended to limit the present invention.
Example 1
A preparation method of a high-strength aluminum alloy plate for a sheet metal process comprises the following steps:
s1: taking ZL114A as an aluminum alloy plate base material, adding a modifier at 715 ℃ and stirring;
the modifier is obtained by compounding aluminum scandium alloy and aluminum telluride, wherein the mass ratio of Sc element to Te element is 1.5:1, wherein the mass ratio of Sc element to the formed aluminum alloy plate is 0.2%;
s2: heating to 720 ℃, adding a refining agent, keeping the temperature for 15min, standing for 30min, and pouring under differential pressure to obtain a molded aluminum alloy plate;
the refining agent is an environment-friendly refining agent, and the mass ratio of the refining agent to the formed aluminum alloy plate is 0.05 percent;
the working conditions of differential pressure casting are as follows: the pouring temperature is 695 ℃, the liquid rising rate is 35mm/s, the mold filling rate is 45mm/s, the pressure maintaining differential pressure is 80kPa, and the pressure maintaining time is 8min;
s3: carrying out solid solution aging treatment on the formed aluminum alloy plate, and grinding and polishing to obtain an aluminum alloy plate body;
the working conditions of the solution aging treatment are as follows: the solid solution temperature is set to 535 ℃, the solid solution time is 20 hours, the aging temperature is 165 ℃, and the aging heat preservation time is 7 hours;
s4: firstly, putting an aluminum alloy plate body into electrolyte for anodic oxidation;
the working conditions of the anodic oxidation are as follows: the time is 10min, the temperature is 35 ℃, and the current density is 15mA/cm 2 (ii) a The electrolyte used for anodic oxidation is: deionized water is used as a solvent, wherein 36g/L of sodium hydroxide, 102g/L of sodium silicate, 2.4g/L of terephthalic acid and 6mL/L of polyacrylic acid are contained;
s5: preparing hole sealing liquid by using hydroxylated graphene, beta-cyclodextrin, modified silica sol, polyamino silane, waterborne polyurethane, a defoaming agent and deionized water;
the hole sealing liquid comprises the following components in parts by mass: 0.05 part of hydroxylated graphene, 2 parts of beta-cyclodextrin, 4 parts of modified silica sol, 1 part of polyamino silane, 25 parts of waterborne polyurethane, 0.5 part of defoaming agent and 1 part of deionized water; (1 g per portion)
The preparation of the modified silica sol comprises the following steps:
1) Mixing 0.39g of aluminum chloride, 0.02g of boric acid, 1.52g of ethyl orthosilicate and 20mL of deionized water, stirring for 4 hours to obtain an aluminum boron silica sol mother liquor, and adding the deionized water to prepare the aluminum boron silica sol mother liquor with the concentration of 0.5 wt%;
2) Mixing 90g of deionized water and 10g of polyvinyl alcohol, adding 100g of silica sol, stirring to obtain a polyvinyl alcohol spinning solution, and performing electrostatic spinning to obtain a pretreatment membrane;
the working conditions of electrostatic spinning are as follows: the spinning voltage is 10kV, the receiving distance is 20cm, the advancing speed is 0.5mL/h, and the electrostatic spinning time is 1h;
3) Drying the pretreatment membrane, calcining, heating to 205 ℃, keeping the temperature for 25min, and then heating to 790 ℃ at the speed of 5 ℃/min to obtain a flexible ceramic nano membrane;
4) Equally cutting the flexible ceramic nano-film into pieces, sequentially putting the pieces into an aluminum boron silica sol mother solution with the concentration of 0.5wt% for soaking for 20min, sequentially taking out the pieces, stacking the flexible ceramic nano-film layer by layer, quickly freezing and molding the stacked layered blocks by using liquid nitrogen, carrying out freeze-drying treatment for 30h, carrying out high-temperature calcination, heating to 890 ℃ at the speed of 5 ℃/min, and carrying out heat preservation for 40min to obtain modified silica sol;
s6: immersing the anodized aluminum alloy plate body into hole sealing liquid for hole sealing, draining, blowing by using high-pressure air, and drying to obtain the high-strength aluminum alloy plate for the sheet metal process;
the working conditions of drying are as follows: drying for 15min at the temperature of 80 ℃, wherein the working conditions of hole sealing are as follows: the pH was 8, the temperature 25 ℃ and the immersion time 45s.
Example 2
A preparation method of a high-strength aluminum alloy plate for a sheet metal process comprises the following steps:
s1: taking ZL114A as an aluminum alloy plate base material, adding an alterant at the temperature of 720 ℃ and stirring;
the modifier is obtained by compounding aluminum scandium alloy and aluminum telluride, wherein the mass ratio of Sc element to Te element is 1.5:1, wherein the mass ratio of Sc element to the formed aluminum alloy plate is 0.3 percent;
s2: heating to 725 ℃, adding a refining agent, preserving heat for 18min, standing for 35min, and pouring under differential pressure to obtain a molded aluminum alloy plate;
the refining agent is an environment-friendly refining agent, and the mass ratio of the refining agent to the formed aluminum alloy plate is 0.07%;
the working conditions of differential pressure casting are as follows: the pouring temperature is 710 ℃, the liquid rising speed is 40mm/s, the mold filling speed is 50mm/s, the pressure maintaining pressure difference is 85kPa, and the pressure maintaining time is 6min;
s3: carrying out solid solution aging treatment on the formed aluminum alloy plate, and grinding and polishing to obtain an aluminum alloy plate body;
the working conditions of the solution aging treatment are as follows: the solid solution temperature is set to be 540 ℃, the solid solution time is 18h, the aging temperature is 170 ℃, and the aging heat preservation time is 6h;
s4: firstly, putting an aluminum alloy plate body into electrolyte for anodic oxidation;
the working conditions of the anodic oxidation are as follows: the time is 12min, the temperature is 33 ℃, and the current density is 15mA/cm 2 (ii) a The electrolyte used for anodic oxidation is: deionized water is used as a solvent, wherein the concentration of sodium hydroxide is 36g/L, the concentration of sodium silicate is 102g/L, the concentration of terephthalic acid is 2.4g/L, and the concentration of polyacrylic acid is 6mL/L;
s5: preparing hole sealing liquid by using hydroxylated graphene, beta-cyclodextrin, modified silica sol, polyamino silane, waterborne polyurethane, a defoaming agent and deionized water;
the hole sealing liquid comprises the following components in parts by mass: 0.07 part of hydroxylated graphene, 4 parts of beta-cyclodextrin, 8 parts of modified silica sol, 2 parts of polyaminosilane, 30 parts of waterborne polyurethane, 0.6 part of defoaming agent and 3 parts of deionized water; (1 g per portion)
The preparation of the modified silica sol comprises the following steps:
1) Mixing 0.39g of aluminum chloride, 0.02g of boric acid, 1.52g of ethyl orthosilicate and 20mL of deionized water, stirring for 4 hours to obtain an aluminum boron silica sol mother liquor, and adding the deionized water to prepare the aluminum boron silica sol mother liquor with the concentration of 0.8 wt%;
2) Mixing 90g of deionized water and 10g of polyvinyl alcohol, adding 100g of silica sol, stirring to obtain a polyvinyl alcohol spinning solution, and performing electrostatic spinning to obtain a pretreatment membrane;
the working conditions of electrostatic spinning are as follows: the spinning voltage is 10kV, the receiving distance is 20cm, the advancing speed is 0.5mL/h, and the electrostatic spinning time is 1h;
3) Drying the pretreatment membrane, calcining, heating to 205 ℃, keeping the temperature for 25min, and then heating to 790 ℃ at the speed of 5 ℃/min to obtain a flexible ceramic nano membrane;
4) Equally cutting the flexible ceramic nano-film into pieces, sequentially putting the pieces into an aluminum boron silica sol mother solution with the concentration of 0.8wt% for soaking for 25min, sequentially taking out the pieces, stacking the flexible ceramic nano-film layer by layer, quickly freezing and molding the stacked layered blocks by using liquid nitrogen, carrying out freeze-drying treatment for 30h, carrying out high-temperature calcination, heating to 890 ℃ at the speed of 5 ℃/min, and carrying out heat preservation for 45min to obtain modified silica sol;
s6: immersing the anodized aluminum alloy plate body into hole sealing liquid for hole sealing, draining, blowing by using high-pressure air, and drying to obtain the high-strength aluminum alloy plate for the sheet metal process;
the working conditions of drying are as follows: drying for 12min at 90 ℃, wherein the working conditions of hole sealing are as follows: the pH was 8.3, the temperature 28 ℃ and the immersion time 40s.
Example 3
A preparation method of a high-strength aluminum alloy plate for a sheet metal process comprises the following steps:
s1: taking ZL114A as an aluminum alloy plate base material, adding a modifier at 720 ℃ and stirring;
the modifier is obtained by compounding aluminum scandium alloy and aluminum telluride, wherein the mass ratio of Sc element to Te element is 1.5:1, wherein the mass ratio of Sc element to the formed aluminum alloy plate is 0.4%;
s2: heating to 730 ℃, adding a refining agent, preserving heat for 20min, standing for 40min, and pouring under differential pressure to obtain a molded aluminum alloy plate;
the refining agent is an environment-friendly refining agent, and the mass ratio of the refining agent to the formed aluminum alloy plate is 0.09%;
the working conditions of differential pressure casting are as follows: the pouring temperature is 715 ℃, the liquid rising speed is 45mm/s, the mold filling speed is 55mm/s, the pressure maintaining pressure difference is 95kPa, and the pressure maintaining time is 8min;
s3: carrying out solid solution aging treatment on the formed aluminum alloy plate, and grinding and polishing to obtain an aluminum alloy plate body;
the working conditions of the solid solution aging treatment are as follows: the solid solution temperature is set to be 545 ℃, the solid solution time is 16h, the aging temperature is 175 ℃, and the aging heat preservation time is 5h;
s4: firstly, putting an aluminum alloy plate body into electrolyte for anodic oxidation;
the working conditions of the anodic oxidation are as follows: the time is 15min, the temperature is 30 ℃, and the current density is 15mA/cm 2 (ii) a The electrolyte used for anodic oxidation is: deionized water is used as a solvent, wherein the concentration of sodium hydroxide is 36g/L, the concentration of sodium silicate is 102g/L, the concentration of terephthalic acid is 2.4g/L, and the concentration of polyacrylic acid is 6mL/L;
s5: preparing hole sealing liquid by using hydroxylated graphene, beta-cyclodextrin, modified silica sol, polyamino silane, waterborne polyurethane, a defoaming agent and deionized water;
the hole sealing liquid comprises the following components in parts by mass: 0.1 part of hydroxylated graphene, 5 parts of beta-cyclodextrin, 10 parts of modified silica sol, 3 parts of polyaminosilane, 35 parts of waterborne polyurethane, 1 part of defoaming agent and 5 parts of deionized water; (1 g per portion)
The preparation of the modified silica sol comprises the following steps:
1) Mixing 0.39g of aluminum chloride, 0.02g of boric acid, 1.52g of tetraethoxysilane and 20mL of deionized water, stirring for 4 hours to obtain an aluminum boron silica sol mother liquor, and adding deionized water to prepare the aluminum boron silica sol mother liquor with the concentration of 1 wt%;
2) Mixing 90g of deionized water and 10g of polyvinyl alcohol, adding 100g of silica sol, stirring to obtain a polyvinyl alcohol spinning solution, and performing electrostatic spinning to obtain a pretreatment membrane;
the working conditions of electrostatic spinning are as follows: the spinning voltage is 10kV, the receiving distance is 20cm, the advancing speed is 0.5mL/h, and the electrostatic spinning time is 1h;
3) Drying the pretreatment membrane, calcining, heating to 205 ℃, keeping the temperature for 25min, and then heating to 790 ℃ at the speed of 5 ℃/min to obtain a flexible ceramic nano membrane;
4) Equally cutting the flexible ceramic nano-film into pieces, sequentially putting the pieces into an aluminum boron silica sol mother solution with the concentration of 1wt% for soaking for 30min, sequentially taking out the pieces, stacking the flexible ceramic nano-film layer by layer, carrying out quick freezing molding on the stacked layered blocks by using liquid nitrogen, carrying out freeze-drying treatment for 30h, carrying out high-temperature calcination, heating to 890 ℃ at the speed of 5 ℃/min, and carrying out heat preservation for 50min to obtain modified silica sol;
s6: immersing the anodized aluminum alloy plate body into hole sealing liquid for hole sealing, draining, blowing by high-pressure air, and drying to obtain a high-strength aluminum alloy plate for the sheet metal process;
the working conditions of drying are as follows: drying for 10min at 100 ℃, wherein the working conditions of hole sealing are as follows: the pH was 8.5, the temperature was 30 ℃ and the immersion time was 30s.
Comparative example 1
Example 3 was used as a control, and no aluminum telluride was added, and the other steps were normal.
Comparative example 2
Example 3 was used as a control, and no aluminum-scandium alloy was added, and the other steps were normal.
Comparative example 3
Taking the example 2 as a control group, the mass ratio of Sc element to Te element is 2:1, other procedures are normal.
Comparative example 4
The control group of example 3 was not anodized, and the other steps were normal.
Comparative example 5
Taking example 3 as a control group, polyacrylic acid was not added in the anodic oxidation, and other processes were normal.
Comparative example 6
Example 3 was used as a control, no hydroxylated graphene was added, and the other steps were normal.
Comparative example 7
Example 3 was used as a control, and no β -cyclodextrin was added, and the other steps were normal.
Comparative example 8
Example 3 was used as a control, no polyaminosilane was added, and the other steps were normal.
Comparative example 9
The modified silica sol was replaced with the silica sol in example 3 as a control, and the other steps were normal.
The number of layers of the bulk flexible ceramic nanofilms stacked one on top of another in the above examples and comparative examples was 20.
The used raw material sources are as follows:
ZL114A: 7% of silicon, 0.55% of magnesium, 0.16% of titanium, 0.05% of iron and the balance of aluminum; aluminum scandium alloy (2%): huainan, kedi chemical technology, inc.; aluminum telluride (12043-29-7): hubei Jusheng science and technology, inc.; environment-friendly refining agent 1102: mount Foshan Saibenge casting technology, inc.; sodium hydroxide, sodium silicate, aluminum chloride, boric acid, ethyl orthosilicate, analytically pure: a pharmaceutical group reagent; hydroxylated graphene 7782-42-5: shanghai Aladdin Biotechnology GmbH; polyaminosilane (divinyltriaminopropyltrimethoxysilane) NQ-62: hubei Chengfeng chemical Co., ltd; aqueous polyurethane W909580, polyvinyl alcohol P816862, beta-cyclodextrin C871851, terephthalic acid P816020, polyacrylic acid P815683: shanghai Maxin Biochemical technologies, inc.; antifoaming agent (F-13 antifoaming agent): shanghai chain Collection chemical Co., ltd; silica sol 14808-60-7: wuhan eosin Biotechnology Ltd.
And (4) performance testing:
referring to GB/T1771-2007 test for salt spray resistance, cutting the materials into 150mm multiplied by 100mm multiplied by 1mm, the temperature in a salt spray box is 35 ℃, the concentration of the collected sodium chloride is 60g/L, and the pH value is 7.2; referring to GB/T228.1-2010, testing the mechanical properties at normal temperature (25 ℃) and high temperature (150 ℃) by adopting a digital display tensile testing machine, wherein the tensile speed is 1.5mm/min, a sample is cut into a rod shape, the thickness is 2mm, and the average value is obtained by three times of stretching; the results obtained are shown in table 1;
TABLE 1
The invention provides a high-strength aluminum alloy plate for a sheet metal process and a preparation method thereof, and the aluminum alloy plate with high heat resistance, high strength and good corrosion resistance is prepared.
Comparing the example 3 with the comparative examples 1, 2 and 3, the Sc and Te are adopted to jointly modify the performance of the ZL114A alloy; by controlling the mass ratio of Sc to Te and the introduction amount of a modifier, the mechanical property of the aluminum alloy is greatly improved on the basis of refining eutectic silicon.
Comparing example 3 with comparative examples 4 and 5, it can be seen that sodium hydroxide and sodium silicate are used as the anodic oxidation electrolyte, and polyacrylic acid is added to reduce the number of pores in the anodic oxide film, so that the micropores are distributed more uniformly and the film layer is smoother.
Comparing the example 3 with the comparative example 6, it can be seen that the introduction of the hydroxylated graphene into the hole sealing liquid greatly improves the strength, wear resistance and scratch resistance of the sealing film, thereby effectively delaying the corrosion of the aluminum alloy. And the oxidability of the hydroxylated graphene has a secondary passivation effect on the aluminum alloy, so that the anodic oxide film has self-repairability.
Comparing the example 3 with the comparative examples 7 and 8, it can be seen that, furthermore, the polyamino silane is diethylenetriaminopropyltrimethoxysilane, the addition of the diethylenetriaminopropyltrimethoxysilane into the hole sealing liquid can improve the smoothness of the surface of the film formed after hole sealing, effectively reduce the number of cracks and residual discharge micropores after hole sealing and obviously reduce the number of cracks and residual discharge micropores, and effectively improve the binding force between the sealing liquid and the anodic oxide film through the synergistic effect of the polyamino silane and the beta-cyclodextrin.
Comparing the example 3 with the comparative example 9, it can be seen that the introduction of the silica sol improves the strength of the sealing film and improves the high temperature resistance of the aluminum alloy while synergistically hydroxylating the graphene, the invention takes the polyvinyl alcohol as the building element of the electrostatic spinning silica nanofiber film, uses the aluminum boron silica sol as the adhesive, combines the sol dipping-layer-by-layer stacking method to assemble the three-dimensional skeleton structure with the layered characteristic, and obtains the layered silica gel with the high-strength and super-elasticity characteristic through freeze drying and calcining. The obtained modified silica sol has a special interlayer structure and an effective bonding network, so that the compression resilience and high temperature resistance of the surface of the aluminum alloy are improved.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications, equivalents and applications made by the present invention or directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A preparation method of a high-strength aluminum alloy plate for a sheet metal process is characterized by comprising the following steps:
s1: taking ZL114A as an aluminum alloy plate base material, adding a modifier at 715-720 ℃ and stirring;
s2: heating to 720-730 deg.C, adding refining agent, keeping the temperature for 15-20min, standing for 30-40min, and pouring under differential pressure to obtain molded aluminum alloy plate;
s3: carrying out solid solution aging treatment on the formed aluminum alloy plate, and grinding and polishing to obtain an aluminum alloy plate body;
s4: firstly, putting an aluminum alloy plate body into electrolyte for anodic oxidation;
s5: preparing hole sealing liquid by using hydroxylated graphene, beta-cyclodextrin, modified silica sol, polyamino silane, waterborne polyurethane, a defoaming agent and deionized water;
s6: and (3) immersing the aluminum alloy plate body subjected to anodic oxidation into hole sealing liquid for hole sealing, draining, blowing by using high-pressure air, and drying to obtain the high-strength aluminum alloy plate for the sheet metal process.
2. The method for preparing the high-strength aluminum alloy plate for the sheet metal process according to claim 1, wherein the modifier is obtained by compounding aluminum scandium alloy and aluminum telluride, and the mass ratio of Sc elements to Te elements is 1.5:1, wherein the mass ratio of Sc element to the formed aluminum alloy plate is 0.2-0.4%.
3. The manufacturing method of a high-strength aluminum alloy sheet for sheet metal process as set forth in claim 1, wherein the mass ratio of the refining agent to the formed aluminum alloy sheet is 0.05-0.09%.
4. The method for preparing the high-strength aluminum alloy plate for the sheet metal process according to claim 1, wherein the hole sealing liquid comprises the following components in parts by mass: 0.05-0.1 part of hydroxylated graphene, 2-5 parts of beta-cyclodextrin, 4-10 parts of modified silica sol, 1-3 parts of polyaminosilane, 25-35 parts of waterborne polyurethane, 0.5-1 part of defoaming agent and 1-5 parts of deionized water.
5. The method of manufacturing a high-strength aluminum alloy sheet for a sheet metal process according to claim 1, wherein the operating conditions of the differential pressure casting are: pouring temperature is 695-715 ℃, liquid rising rate is 35-45mm/s, mold filling rate is 45-55mm/s, pressure maintaining differential pressure is 80-95kPa, and pressure maintaining time is 4-8min; the working conditions of the solid solution aging treatment are as follows: the solid solution temperature is 535-545 ℃, the solid solution time is 16-20h, the aging temperature is 165-175 ℃, and the aging heat preservation time is 5-7h.
6. The manufacturing method of a high-strength aluminum alloy sheet for sheet metal process as set forth in claim 1, wherein the drying conditions are: drying for 10-15min at 80-100 ℃, wherein the working conditions of hole sealing are as follows: the pH is 8-8.5, the temperature is 25-30 deg.C, and the immersion time is 30-45s.
7. The method of manufacturing a high-strength aluminum alloy sheet for sheet metal processing according to claim 1, wherein the working conditions of the anodic oxidation are: the time is 10-15min, the temperature is 30-35 deg.C, and the current density is 15mA/cm 2 (ii) a The electrolyte used for anodic oxidation is: deionized water is used as a solvent, wherein 36g/L of sodium hydroxide, 102g/L of sodium silicate, 2.4g/L of terephthalic acid and 6mL/L of polyacrylic acid are contained.
8. The method of manufacturing a high-strength aluminum alloy sheet for a sheet metal process according to claim 1, wherein the preparation of the modified silica sol comprises the steps of:
1) Mixing aluminum chloride, boric acid, ethyl orthosilicate and deionized water, stirring for 4 hours to obtain an aluminum boron silica sol mother liquor, and adding the deionized water to prepare the aluminum boron silica sol mother liquor with the concentration of 0.5-1 wt%;
2) Mixing deionized water and polyvinyl alcohol, adding silicon dioxide sol, stirring to obtain a polyvinyl alcohol spinning solution, and performing electrostatic spinning to obtain a pretreatment membrane;
3) Drying the pretreatment film and then calcining to obtain a flexible ceramic nano film;
4) Equally cutting the flexible ceramic nano-film into pieces, sequentially putting the pieces into an aluminum boron silica sol mother solution with the concentration of 0.5-1wt% for soaking for 20-30min, sequentially taking out the pieces, stacking the flexible ceramic nano-film layer by layer, performing quick freezing on the stacked layered blocks by using liquid nitrogen, performing freeze-drying treatment for 30h, and calcining at high temperature to obtain the modified silica sol.
9. The manufacturing method of a high-strength aluminum alloy sheet for sheet metal process as set forth in claim 8, wherein the working conditions of 3) the calcination treatment are: heating to 205 deg.C, keeping the temperature for 25min, and heating to 790 deg.C at 5 deg.C/min; 4) The working conditions of the high-temperature calcination are as follows: heating to 890 deg.C at 5 deg.C/min, and keeping the temperature for 40-50min.
10. A high-strength aluminum alloy sheet for sheet metal processing, characterized by being processed by the production method according to any one of claims 1 to 9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215630A (en) * | 2013-04-23 | 2013-07-24 | 沈阳理工大学 | Method for sealing aluminum alloy anode oxide film pore by adopting organic-inorganic composite silica sol |
| CN106400085A (en) * | 2016-06-21 | 2017-02-15 | 武汉风帆电化科技股份有限公司 | Hole sealing agent and method for aluminum and aluminum alloy anode oxide film aftertreatment |
| CN108441923A (en) * | 2018-03-23 | 2018-08-24 | 长沙小新新能源科技有限公司 | A kind of hole-sealing technology of magnesium alloy |
| CN111020667A (en) * | 2019-12-31 | 2020-04-17 | 佛山市南海双成金属表面技术有限公司 | Method for pre-sealing hole of anodic oxide film and hole sealing agent |
| CN114672684A (en) * | 2022-03-31 | 2022-06-28 | 江苏恒鑫正宏科技有限公司 | High-strength aluminum alloy section for brake chamber and processing technology thereof |
-
2022
- 2022-10-26 CN CN202211319882.9A patent/CN115679139B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215630A (en) * | 2013-04-23 | 2013-07-24 | 沈阳理工大学 | Method for sealing aluminum alloy anode oxide film pore by adopting organic-inorganic composite silica sol |
| CN106400085A (en) * | 2016-06-21 | 2017-02-15 | 武汉风帆电化科技股份有限公司 | Hole sealing agent and method for aluminum and aluminum alloy anode oxide film aftertreatment |
| CN108441923A (en) * | 2018-03-23 | 2018-08-24 | 长沙小新新能源科技有限公司 | A kind of hole-sealing technology of magnesium alloy |
| CN111020667A (en) * | 2019-12-31 | 2020-04-17 | 佛山市南海双成金属表面技术有限公司 | Method for pre-sealing hole of anodic oxide film and hole sealing agent |
| CN114672684A (en) * | 2022-03-31 | 2022-06-28 | 江苏恒鑫正宏科技有限公司 | High-strength aluminum alloy section for brake chamber and processing technology thereof |
Non-Patent Citations (3)
| Title |
|---|
| "铝及铝合金阳极氧化膜封孔技术机理、应用及研究进展", 《电镀与涂饰》, vol. 41, no. 18, pages 1305 - 1311 * |
| XIN ZHANG: "Super strong, shear resistant, and highly elastic lamellar structured ceramic nanofibrous aerogels for thermal insulation", 《JOURNAL OF MATERIALS CHEMISTRY A》, pages 27416 - 27417 * |
| 付广艳: "聚丙烯酸添加剂对镁合金阳极氧化膜性能的影响", 《材料保护》, vol. 55, no. 9, pages 109 - 113 * |
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