CN112952253A - Processing technology of aluminum alloy battery tray of passenger vehicle - Google Patents
Processing technology of aluminum alloy battery tray of passenger vehicle Download PDFInfo
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- CN112952253A CN112952253A CN202110109855.8A CN202110109855A CN112952253A CN 112952253 A CN112952253 A CN 112952253A CN 202110109855 A CN202110109855 A CN 202110109855A CN 112952253 A CN112952253 A CN 112952253A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 37
- 238000005516 engineering process Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000001125 extrusion Methods 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 238000007872 degassing Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000000155 melt Substances 0.000 claims abstract description 6
- 238000007670 refining Methods 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 67
- 238000000576 coating method Methods 0.000 claims description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 238000005406 washing Methods 0.000 claims description 35
- 230000032683 aging Effects 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 21
- 239000000956 alloy Substances 0.000 claims description 20
- QNVRIHYSUZMSGM-UHFFFAOYSA-N hexan-2-ol Chemical compound CCCCC(C)O QNVRIHYSUZMSGM-UHFFFAOYSA-N 0.000 claims description 20
- 230000003471 anti-radiation Effects 0.000 claims description 16
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 15
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 15
- 239000003963 antioxidant agent Substances 0.000 claims description 15
- 230000003078 antioxidant effect Effects 0.000 claims description 15
- 239000003822 epoxy resin Substances 0.000 claims description 15
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 239000002114 nanocomposite Substances 0.000 claims description 14
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 238000005238 degreasing Methods 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 11
- 238000005524 ceramic coating Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000000265 homogenisation Methods 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 10
- 238000005728 strengthening Methods 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910019752 Mg2Si Inorganic materials 0.000 claims description 5
- 230000002421 anti-septic effect Effects 0.000 claims description 5
- 230000003750 conditioning effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 5
- QXLPXWSKPNOQLE-UHFFFAOYSA-N methylpentynol Chemical compound CCC(C)(O)C#C QXLPXWSKPNOQLE-UHFFFAOYSA-N 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 239000003345 natural gas Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 claims description 5
- 238000000108 ultra-filtration Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011651 chromium Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000003562 lightweight material Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention belongs to the technical field of battery tray processing, and particularly relates to a processing technology of an aluminum alloy battery tray of a passenger vehicle, which comprises the following steps: casting: adding the prepared raw materials into a smelting furnace according to the process requirements for melting, and effectively removing impurity slag and gas in the melt by means of degassing, deslagging and refining; the isothermal extrusion is realized by combining an extrusion process for realizing isothermal extrusion with a gradient heating process through variable speed regulation, the temperature of an aluminum bar which is heated before extrusion is gradually reduced along the axis direction from front to back to form a temperature gradient, isothermal extrusion is realized, the surface temperature of a heated and processed product core is uniform, the surface color is bright, the mechanical property deviation is small, metal deformation caused by high-temperature and high-pressure thermal friction of a die is reduced and avoided, the current situation that the head and tail size deviation of a long product after extrusion is large is effectively improved, the basic consistency of the surface temperature during section bar discharging can be ensured, and the product quality is greatly improved.
Description
Technical Field
The invention belongs to the technical field of battery tray processing, and particularly relates to a processing technology of an aluminum alloy battery tray of a passenger vehicle.
Background
The application of the aluminum in new energy automobile parts mainly comprises automobile bodies, hubs, chassis, anti-collision beams, floors, power batteries, seats and the like. At present, new energy automobiles mostly adopt aluminum alloy sections to manufacture power battery trays of electric automobiles, and the lightweight degree of the new energy automobiles is further improved. The aluminum alloy has the advantages of small density (2.73g/cm3), good corrosion resistance and excellent plasticity in application in automobile light weight, and has incomparable superiority with other light weight materials in aspects of production cost, part quality, material utilization, manufacturing technology, mechanical property, sustainable development and the like, so the aluminum alloy becomes a preferred light weight material in the automobile industry.
The battery of new energy automobile is very important part, and the battery passes through the battery tray to be installed on new energy automobile's frame usually, and because the tray that the metal was made, the quality is heavier, is unfavorable for realizing whole car lightweight.
Therefore, the technical field provides a processing technology of an aluminum alloy battery tray for a passenger car, so as to solve the problems in the background.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a processing technology of an aluminum alloy battery tray for a passenger vehicle, which has the characteristics of simple technology, uniform surface temperature of a heated and processed product core, bright surface color, small mechanical property deviation and high product quality.
In order to achieve the purpose, the invention provides the following technical scheme: the aluminum alloy battery tray for the passenger vehicle is prepared from the following raw materials in percentage by mass: 1.12 to 1.20 percent of Si, 0.75 to 0.80 percent of Mg0.13 to 0.180 percent of Cu0.13, 0.22 to 0.270 percent of Fe0.66 to 0.80 percent of Mn0.07 to 0.09 percent of Cr0.07, 0.01 to 0.03 percent of Zn0.02 to 0.05 percent of Ti0.02 to 0.002 percent of Ca and Na, and the balance of A.
A processing technology of an aluminum alloy battery tray of a passenger car comprises the following steps:
s1, casting: adding the prepared raw materials into a smelting furnace according to the process requirements for smelting, effectively removing impurity slag and gas in the melt by means of degassing and deslagging refining, and cooling and casting the smelted molten aluminum into an aluminum alloy ingot by a deep well casting system;
s2, homogenization: placing the aluminum alloy cast ingot at 580-585 ℃ for high-temperature homogenization treatment, and heating for 9-11 h;
s3, cooling: cooling with strong water to 111-114 ℃;
s4, heating: shearing the ingot into a short aluminum bar with the length of 550-700 mm by a hot shearing device, sending the short aluminum bar into a natural gas aluminum bar heating furnace for preheating, and then sending the short aluminum bar into an extruder for extrusion molding, wherein the temperature of the extruded section bar is 515-525 ℃, heating areas in four stages are arranged in the extruder, the first stage is set to be 500 ℃, the second stage is set to be 450 ℃, the third stage is set to be 400 ℃, and the fourth stage is set to be 300 ℃;
s5, stretching: stretching and straightening the extruded section according to the deformation of 3-5 percent;
s6, double-stage aging heat treatment process: adopting a two-stage aging heat treatment process for the section bar after the tension straightening processing; the method comprises the following steps of (1) carrying out first-stage low-temperature pre-aging treatment, heating at 125-130 ℃ for 1-3 h, keeping the temperature for 4-5 h, adjusting the temperature to be increased to 166-170 ℃, heating for 0.6-0.9 h, keeping the temperature for 7-8 h, and carrying out second-stage peak aging treatment, so that after the section is subjected to two-stage aging treatment, aging strengthening phases are fully and uniformly precipitated, and the mechanical property requirement of the alloy is improved;
s7, surface treatment: spraying a layer of anti-radiation coating on the surface of the tray, and putting the sprayed plastic uptake box into an oven for drying or naturally airing;
s8, antiseptic treatment: and performing surface anticorrosion treatment on the tray workpiece to obtain the automobile battery tray.
Preferably, the radiation-resistant paint in step S7 includes the following raw materials: epoxy resin, antimony oxide, methyl amyl alcohol, sodium dodecyl sulfate and an antioxidant.
Preferably, the radiation-resistant coating comprises the following raw materials in parts by weight: 105-115 parts of epoxy resin, 4-5 parts of antimony oxide, 25-30 parts of methylpentanol, 12-15 parts of sodium dodecyl sulfate and 1.1-1.3 parts of antioxidant
Preferably, the radiation-resistant coating is obtained by the following steps: and fully mixing the epoxy resin, the antimony oxide and the methyl amyl alcohol, adding the sodium dodecyl sulfate and the antioxidant, and mixing again to obtain the anti-radiation coating.
Preferably, in the step S4, the cast rod is extruded in an isothermal extrusion mode by adopting variable speed regulation, so that the surface temperature of the extruded section reaches 545-555 ℃ after the extruded section is subjected to demolding molding; the forced cooling mode is that the alloy enters a circulating flow water tank with the water temperature of 50 +/-3 ℃ at the speed of 300 +/-5 ℃/min to carry out online solution and water quenching treatment, so that the Mg2Si strengthening phase in the alloy material is dissolved into a matrix in the maximum quantity.
Preferably, the anticorrosion treatment in step S8 is oxidation and electrophoretic coating treatment, and specifically, after the tray workpiece is subjected to anodic oxidation treatment, the tray workpiece is chemically degreased by hanging, is subjected to primary double-lattice cold water washing, is subjected to pre-degreasing and primary degreasing, is subjected to secondary double-lattice cold water washing, is subjected to primary water washing again, is converted into a skin membrane after surface conditioning, is subjected to secondary water washing and tertiary water washing again, is subjected to pure water washing again, is subjected to draining, is subjected to electrophoretic coating, is subjected to ultrafiltration circulating water washing again, is cooled after draining and drying, and is hung obliquely.
Preferably, a compact coating is formed on the surface of the tray workpiece through the electrophoretic coating treatment, and the coating is a high-temperature-resistant insulating heat-conducting coating.
Preferably, the coating is a single component and is an alcohol system inorganic nano composite ceramic coating.
Compared with the prior art, the invention has the beneficial effects that:
1. the extrusion process for realizing isothermal extrusion by adopting variable speed regulation and control is combined with a gradient heating process, the temperature of the aluminum bar which is heated before extrusion is gradually reduced along the axial direction from front to back to form a temperature gradient, so that isothermal extrusion is realized, the surface temperature of the heated and processed product core is uniform, the surface color is bright, the mechanical property deviation is small, metal deformation caused by the die bearing high-temperature high-pressure thermal friction is reduced and avoided, the current situation that the head and tail size deviation of the extruded long product is large is effectively improved, the basic consistency of the surface temperature during section bar discharging can be ensured, and the product quality is greatly improved;
2. the content of related elements in the alloy is integrated, the percentage of alloy element components such as silicon Si, magnesium Mg, iron Fe, copper Cu, manganese Mn, chromium Cr, zinc Zn, titanium Ti and the like is increased, and the comprehensive properties such as tensile strength, yield strength, elongation, hardness and the like of the high-strength aluminum alloy material for the automobile battery tray are improved;
3. the anti-radiation coating is sprayed on the surface of the tray, so that the anti-radiation capability of the tray is improved, cathode electrophoresis coating is carried out on the outer surface of a workpiece, a compact coating is formed on the surface of the workpiece, the coating is a high-temperature-resistant insulating heat-conducting coating, the coating is a single component and is an alcohol system inorganic nano composite ceramic coating, a nano ceramic dispersion process technology is adopted, the dispersion is more uniform and stable, the treatment of a bonding interface between nano micro particles is efficient and stable, and the better bonding strength between the nano composite ceramic coating and a base material is ensured, so that the performance is more excellent and stable; the formula of the nano composite ceramic is compounded, so that the function of the nano composite ceramic coating is controllable; the nano composite ceramic coating presents a good micro-nano structure, the nano composite ceramic particles completely wrap the micron composite ceramic particles, gaps among the micron composite ceramic particles are filled with the nano composite ceramic particles to form a compact coating, and the nano composite ceramic particles penetrate through the surface of the filling and repairing base material, so that a large amount of stable metal ceramic intermediate phase can be formed more easily, flame resistance or high-temperature airflow direct scouring can be completely achieved, the problem of flame retardance of magnesium alloy materials is solved, the nano composite ceramic coating is suitable for holding batteries, and can be further applied and popularized in the fields of automobiles, aerospace and the like;
4. the invention carries out double improvement on the aspects of formula and process, not only essentially improves the overall performance of the battery tray, but also leads the manufactured battery tray to be more suitable for containing batteries by means of external coating, thus manufacturing an environment suitable for storing the batteries.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the processing flow structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
Example 1
Referring to fig. 1, the present invention provides the following technical solutions: the aluminum alloy battery tray for the passenger vehicle is prepared from the following raw materials in percentage by mass: si 1.12%, Mg0.75%, Cu0.13%, Fe0.22%, Mn0.66%, Cr0.07%, Zn0.01%, Ti0.02%, Ca + Na/< 0.002%, the rest is A.
A processing technology of an aluminum alloy battery tray of a passenger car comprises the following steps:
s1, casting: adding the prepared raw materials into a smelting furnace according to the process requirements for smelting, effectively removing impurity slag and gas in the melt by means of degassing and deslagging refining, and cooling and casting the smelted molten aluminum into an aluminum alloy ingot by a deep well casting system;
s2, homogenization: placing the aluminum alloy ingot at 580 ℃ for high-temperature homogenization treatment, and heating for 9 hours;
s3, cooling: cooling with strong water to 111 deg.C;
s4, heating: shearing the ingot into a short aluminum bar with the length of 550mm by a hot shearing device, sending the short aluminum bar into a natural gas aluminum bar heating furnace for preheating, and then sending the short aluminum bar into an extruder for extrusion molding, wherein the temperature of an extruded section bar is 515 ℃, heating areas in four stages are arranged in the extruder, the first stage is set to be 500 ℃, the second stage is set to be 450 ℃, the third stage is set to be 400 ℃, and the fourth stage is set to be 300 ℃;
s5, stretching: stretching and straightening the extruded section according to the deformation of 3-5 percent;
s6, double-stage aging heat treatment process: adopting a two-stage aging heat treatment process for the section bar after the tension straightening processing; the first stage of low-temperature pre-aging treatment is carried out, after the temperature is raised for 1h at 125 ℃ and kept for 4h, the temperature is adjusted to be raised to 166 ℃ and raised for 0.6h and kept for 7h, and the second stage of peak value aging treatment is carried out, so that after the section is subjected to the two-stage aging treatment, aging strengthening phases are fully and uniformly precipitated, and the mechanical property requirement of the alloy is improved;
s7, surface treatment: spraying a layer of anti-radiation coating on the surface of the tray, and putting the sprayed plastic uptake box into an oven for drying or naturally airing;
s8, antiseptic treatment: and performing surface anticorrosion treatment on the tray workpiece to obtain the automobile battery tray.
Specifically, in step S7, the anti-radiation coating includes the following raw materials: epoxy resin, antimony oxide, methyl amyl alcohol, sodium dodecyl sulfate and an antioxidant.
Specifically, the radiation-resistant coating comprises the following raw materials in parts by weight: 105 parts of epoxy resin, 4 parts of antimony oxide, 25 parts of methylpentanol, 12 parts of sodium dodecyl sulfate and 1.1 parts of antioxidant
Specifically, the radiation-resistant coating is obtained by the following steps: and fully mixing the epoxy resin, the antimony oxide and the methyl amyl alcohol, adding the sodium dodecyl sulfate and the antioxidant, and mixing again to obtain the anti-radiation coating.
Specifically, in step S4, a variable speed regulation is adopted to realize isothermal extrusion, so that the surface temperature of the extruded section reaches 545 ℃ after the extruded section is subjected to demolding molding; the forced cooling mode is that the alloy enters a circulating flow water tank with the water temperature of 50 +/-3 ℃ at the speed of 300 +/-5 ℃/min to carry out online solution and water quenching treatment, so that the Mg2Si strengthening phase in the alloy material is dissolved into a matrix in the maximum quantity.
Specifically, the anticorrosion treatment in step S8 is oxidation and electrophoretic coating treatment, and specifically, after the tray workpiece is subjected to anodic oxidation treatment, the tray workpiece is chemically degreased by hanging, and is subjected to primary double-lattice cold water washing, then is subjected to pre-degreasing and primary degreasing, is subjected to secondary double-lattice cold water washing, is subjected to primary water washing again, is converted into a skin membrane after surface conditioning, is subjected to secondary water washing and tertiary water washing again, is subjected to pure water washing again, is subjected to draining, is subjected to electrophoretic coating, is subjected to ultrafiltration circulating water washing again, is cooled after draining and drying, and is then hung obliquely.
Specifically, a compact coating is formed on the surface of the tray workpiece through electrophoretic coating treatment, and the coating is a high-temperature-resistant insulating heat-conducting coating.
Specifically, the coating is a single component and is an alcohol system inorganic nano composite ceramic coating.
Example 2
Referring to fig. 1, the present invention provides the following technical solutions: the aluminum alloy battery tray for the passenger vehicle is prepared from the following raw materials in percentage by mass: si 1.15%, Mg0.78%, Cu0.15%, Fe0.25%, Mn0.7%, Cr0.08%, Zn0.02%, Ti0.04%, Ca + Na/< 0.002%, the rest is A.
A processing technology of an aluminum alloy battery tray of a passenger car comprises the following steps:
s1, casting: adding the prepared raw materials into a smelting furnace according to the process requirements for smelting, effectively removing impurity slag and gas in the melt by means of degassing and deslagging refining, and cooling and casting the smelted molten aluminum into an aluminum alloy ingot by a deep well casting system;
s2, homogenization: placing the aluminum alloy ingot at 583 ℃ for high-temperature homogenization treatment, and heating for 10 h;
s3, cooling: cooling with strong water to 113 deg.C;
s4, heating: shearing the ingot into short aluminum bars with the length of 600mm by a hot shearing device, sending the short aluminum bars into a natural gas aluminum bar heating furnace for preheating, and then sending the short aluminum bars into an extruder for extrusion molding, wherein the temperature of an extruded section bar is 520 ℃, heating areas in four stages are arranged in the extruder, the first stage is set to be 500 ℃, the second stage is set to be 450 ℃, the third stage is set to be 400 ℃, and the fourth stage is set to be 300 ℃;
s5, stretching: stretching and straightening the extruded section according to the deformation of 4 percent;
s6, double-stage aging heat treatment process: adopting a two-stage aging heat treatment process for the section bar after the tension straightening processing; the first stage of low-temperature pre-aging treatment is carried out, after the temperature is raised for 2h at 128 ℃ and is kept for 3h, the temperature is adjusted to be raised to 168 ℃, the temperature is raised for 0.8h and is kept for 9h, and the second stage of peak value aging treatment is carried out, so that after the section is subjected to the two-stage aging treatment, aging strengthening phases are fully and uniformly precipitated, and the mechanical property requirement of the alloy is improved;
s7, surface treatment: spraying a layer of anti-radiation coating on the surface of the tray, and putting the sprayed plastic uptake box into an oven for drying or naturally airing;
s8, antiseptic treatment: and performing surface anticorrosion treatment on the tray workpiece to obtain the automobile battery tray.
Specifically, in step S7, the anti-radiation coating includes the following raw materials: epoxy resin, antimony oxide, methyl amyl alcohol, sodium dodecyl sulfate and an antioxidant.
Specifically, the radiation-resistant coating comprises the following raw materials in parts by weight: 110 parts of epoxy resin, 6 parts of antimony oxide, 28 parts of methylpentanol, 14 parts of sodium dodecyl sulfate and 1.2 parts of antioxidant
Specifically, the radiation-resistant coating is obtained by the following steps: and fully mixing the epoxy resin, the antimony oxide and the methyl amyl alcohol, adding the sodium dodecyl sulfate and the antioxidant, and mixing again to obtain the anti-radiation coating.
Specifically, in step S4, a variable speed regulation is adopted to realize isothermal extrusion, so that the surface temperature of the extruded section reaches 550 ℃ after the extruded section is subjected to demolding molding; the forced cooling mode is that the alloy enters a circulating flow water tank with the water temperature of 50 +/-3 ℃ at the speed of 300 +/-5 ℃/min to carry out online solution and water quenching treatment, so that the Mg2Si strengthening phase in the alloy material is dissolved into a matrix in the maximum quantity.
Specifically, the anticorrosion treatment in step S8 is oxidation and electrophoretic coating treatment, and specifically, after the tray workpiece is subjected to anodic oxidation treatment, the tray workpiece is chemically degreased by hanging, and is subjected to primary double-lattice cold water washing, then is subjected to pre-degreasing and primary degreasing, is subjected to secondary double-lattice cold water washing, is subjected to primary water washing again, is converted into a skin membrane after surface conditioning, is subjected to secondary water washing and tertiary water washing again, is subjected to pure water washing again, is subjected to draining, is subjected to electrophoretic coating, is subjected to ultrafiltration circulating water washing again, is cooled after draining and drying, and is then hung obliquely.
Specifically, a compact coating is formed on the surface of the tray workpiece through electrophoretic coating treatment, and the coating is a high-temperature-resistant insulating heat-conducting coating.
Specifically, the coating is a single component and is an alcohol system inorganic nano composite ceramic coating.
Example 3
Referring to fig. 1, the present invention provides the following technical solutions: the aluminum alloy battery tray for the passenger vehicle is prepared from the following raw materials in percentage by mass: si 1.20%, Mg0.80%, Cu0.180%, Fe0.270%, Mn0.80%, Cr0.09%, Zn0.03%, Ti0.05%, Ca + Na/< 0.002%, and the balance of A.
A processing technology of an aluminum alloy battery tray of a passenger car comprises the following steps:
s1, casting: adding the prepared raw materials into a smelting furnace according to the process requirements for smelting, effectively removing impurity slag and gas in the melt by means of degassing and deslagging refining, and cooling and casting the smelted molten aluminum into an aluminum alloy ingot by a deep well casting system;
s2, homogenization: placing the aluminum alloy cast ingot at 585 ℃ for high-temperature homogenization treatment, and heating for 11 h;
s3, cooling: cooling with strong water to 114 deg.C;
s4, heating: shearing the ingot into short aluminum bars with the length of 700mm by a hot shearing device, sending the short aluminum bars into a natural gas aluminum bar heating furnace for preheating, and then sending the short aluminum bars into an extruder for extrusion molding, wherein the temperature of an extruded section bar is 525 ℃, heating areas in four stages are arranged in the extruder, the first stage is set to be 500 ℃, the second stage is set to be 450 ℃, the third stage is set to be 400 ℃, and the fourth stage is set to be 300 ℃;
s5, stretching: stretching and straightening the extruded section according to the deformation of 5 percent;
s6, double-stage aging heat treatment process: adopting a two-stage aging heat treatment process for the section bar after the tension straightening processing; the first stage of low-temperature pre-aging treatment, namely heating at 130 ℃ for 3h and preserving heat for 5h, then adjusting the temperature to be increased to 170 ℃, heating for 0.9h and preserving heat for 8h to perform the second stage of peak aging treatment, so that after the section is subjected to the two-stage aging treatment, aging strengthening phases are fully and uniformly precipitated to improve the mechanical property requirement of the alloy;
s7, surface treatment: spraying a layer of anti-radiation coating on the surface of the tray, and putting the sprayed plastic uptake box into an oven for drying or naturally airing;
s8, antiseptic treatment: and performing surface anticorrosion treatment on the tray workpiece to obtain the automobile battery tray.
Specifically, in step S7, the anti-radiation coating includes the following raw materials: epoxy resin, antimony oxide, methyl amyl alcohol, sodium dodecyl sulfate and an antioxidant.
Specifically, the radiation-resistant coating comprises the following raw materials in parts by weight: 115 parts of epoxy resin, 5 parts of antimony oxide, 30 parts of methylpentanol, 15 parts of sodium dodecyl sulfate and 1.3 parts of antioxidant
Specifically, the radiation-resistant coating is obtained by the following steps: and fully mixing the epoxy resin, the antimony oxide and the methyl amyl alcohol, adding the sodium dodecyl sulfate and the antioxidant, and mixing again to obtain the anti-radiation coating.
Specifically, in step S4, a variable speed regulation is adopted to realize isothermal extrusion, so that the surface temperature of the extruded section reaches 555 ℃ after the extruded section is subjected to demolding molding; the forced cooling mode is that the alloy enters a circulating flow water tank with the water temperature of 50 +/-3 ℃ at the speed of 300 +/-5 ℃/min to carry out online solution and water quenching treatment, so that the Mg2Si strengthening phase in the alloy material is dissolved into a matrix in the maximum quantity.
Specifically, the anticorrosion treatment in step S8 is oxidation and electrophoretic coating treatment, and specifically, after the tray workpiece is subjected to anodic oxidation treatment, the tray workpiece is chemically degreased by hanging, and is subjected to primary double-lattice cold water washing, then is subjected to pre-degreasing and primary degreasing, is subjected to secondary double-lattice cold water washing, is subjected to primary water washing again, is converted into a skin membrane after surface conditioning, is subjected to secondary water washing and tertiary water washing again, is subjected to pure water washing again, is subjected to draining, is subjected to electrophoretic coating, is subjected to ultrafiltration circulating water washing again, is cooled after draining and drying, and is then hung obliquely.
Specifically, a compact coating is formed on the surface of the tray workpiece through electrophoretic coating treatment, and the coating is a high-temperature-resistant insulating heat-conducting coating.
Specifically, the coating is a single component and is an alcohol system inorganic nano composite ceramic coating.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The phrase "comprising a defined element does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a passenger car aluminum alloy battery tray which characterized in that: the alloy is prepared from the following raw materials in percentage by mass: 1.12 to 1.20 percent of Si, 0.75 to 0.80 percent of Mg0.13 to 0.180 percent of Cu0.13, 0.22 to 0.270 percent of Fe0.66 to 0.80 percent of Mn0.07 to 0.09 percent of Cr0.07, 0.01 to 0.03 percent of Zn0.02 to 0.05 percent of Ti0.02 to 0.002 percent of Ca and Na, and the balance of A.
2. The processing technology of the aluminum alloy battery tray for the passenger car as claimed in claim 1, is characterized in that: the method comprises the following steps:
s1, casting: adding the prepared raw materials into a smelting furnace according to the process requirements for smelting, effectively removing impurity slag and gas in the melt by means of degassing and deslagging refining, and cooling and casting the smelted molten aluminum into an aluminum alloy ingot by a deep well casting system;
s2, homogenization: placing the aluminum alloy cast ingot at 580-585 ℃ for high-temperature homogenization treatment, and heating for 9-11 h;
s3, cooling: cooling with strong water to 111-114 ℃;
s4, heating: shearing the ingot into a short aluminum bar with the length of 550-700 mm by a hot shearing device, sending the short aluminum bar into a natural gas aluminum bar heating furnace for preheating, and then sending the short aluminum bar into an extruder for extrusion molding, wherein the temperature of the extruded section bar is 515-525 ℃, heating areas in four stages are arranged in the extruder, the first stage is set to be 500 ℃, the second stage is set to be 450 ℃, the third stage is set to be 400 ℃, and the fourth stage is set to be 300 ℃;
s5, stretching: stretching and straightening the extruded section according to the deformation of 3-5 percent;
s6, double-stage aging heat treatment: adopting a two-stage aging heat treatment process for the section bar after the tension straightening processing; the method comprises the following steps of (1) carrying out first-stage low-temperature pre-aging treatment, heating at 125-130 ℃ for 1-3 h, keeping the temperature for 4-5 h, adjusting the temperature to be increased to 166-170 ℃, heating for 0.6-0.9 h, keeping the temperature for 7-8 h, and carrying out second-stage peak aging treatment, so that after the section is subjected to two-stage aging treatment, aging strengthening phases are fully and uniformly precipitated, and the mechanical property requirement of the alloy is improved;
s7, surface treatment: spraying a layer of anti-radiation coating on the surface of the tray, and putting the sprayed plastic uptake box into an oven for drying or naturally airing;
s8, antiseptic treatment: and performing surface anticorrosion treatment on the tray workpiece to obtain the automobile battery tray.
3. The processing technology of the aluminum alloy battery tray for the passenger car as claimed in claim 2, wherein the processing technology comprises the following steps: the anti-radiation coating in the step S7 comprises the following raw materials: epoxy resin, antimony oxide, methyl amyl alcohol, sodium dodecyl sulfate and an antioxidant.
4. The processing technology of the aluminum alloy battery tray for the passenger car as claimed in claim 3, wherein the processing technology comprises the following steps: the radiation-resistant coating comprises the following raw materials in parts by weight: 105-115 parts of epoxy resin, 4-5 parts of antimony oxide, 25-30 parts of methylpentanol, 12-15 parts of sodium dodecyl sulfate and 1.1-1.3 parts of antioxidant.
5. The processing technology of the aluminum alloy battery tray for the passenger car as claimed in claim 4, wherein the processing technology comprises the following steps: the radiation-resistant coating is obtained by the following steps: and fully mixing the epoxy resin, the antimony oxide and the methyl amyl alcohol, adding the sodium dodecyl sulfate and the antioxidant, and mixing again to obtain the anti-radiation coating.
6. The processing technology of the aluminum alloy battery tray for the passenger car as claimed in claim 2, wherein the processing technology comprises the following steps: step S4, extruding the cast rod in an isothermal extrusion mode by adopting variable speed regulation, so that the surface temperature of the extruded section reaches 545-555 ℃ after the extruded section is subjected to demolding molding; the forced cooling mode is that the alloy enters a circulating flow water tank with the water temperature of 50 +/-3 ℃ at the speed of 300 +/-5 ℃/min to carry out online solution and water quenching treatment, so that the Mg2Si strengthening phase in the alloy material is dissolved into a matrix in the maximum quantity.
7. The processing technology of the aluminum alloy battery tray for the passenger car as claimed in claim 2, wherein the processing technology comprises the following steps: the anticorrosion treatment in the step S8 is oxidation and electrophoretic coating treatment, and specifically comprises the steps of carrying out anodic oxidation treatment on a tray workpiece, hanging the tray workpiece for chemical degreasing, carrying out primary double-lattice cold water washing, then carrying out pre-degreasing and primary degreasing, carrying out secondary double-lattice cold water washing, carrying out primary water washing again, forming a skin after surface conditioning, carrying out secondary water washing and tertiary water washing again, carrying out pure water washing again, carrying out electrophoretic coating after water draining, carrying out ultrafiltration circulating water washing again, cooling after water draining and drying, and then hanging the tray workpiece obliquely.
8. The processing technology of the aluminum alloy battery tray for the passenger car as claimed in claim 7, wherein the processing technology comprises the following steps: and a compact coating is formed on the surface of the tray workpiece through the electrophoretic coating treatment, and the coating is a high-temperature-resistant insulating heat-conducting coating.
9. The processing technology of the aluminum alloy battery tray for the passenger car as claimed in claim 8, wherein the processing technology comprises the following steps: the coating is a single component and is an alcohol system inorganic nano composite ceramic coating.
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| CN114273862A (en) * | 2021-12-28 | 2022-04-05 | 东北大学 | Integrally-formed aluminum alloy battery tray and manufacturing method thereof |
| WO2023028995A1 (en) * | 2021-09-03 | 2023-03-09 | 江苏恒义工业技术有限公司 | Method for processing short-flow electric automobile battery tray |
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Application publication date: 20210611 |