CN114411026A - Charging pile aluminum alloy plate for new energy vehicle and preparation method thereof - Google Patents

Charging pile aluminum alloy plate for new energy vehicle and preparation method thereof Download PDF

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CN114411026A
CN114411026A CN202111580403.4A CN202111580403A CN114411026A CN 114411026 A CN114411026 A CN 114411026A CN 202111580403 A CN202111580403 A CN 202111580403A CN 114411026 A CN114411026 A CN 114411026A
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aluminum alloy
alloy plate
charging pile
temperature
furnace
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CN114411026B (en
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曲江锋
李国锋
姚明辉
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Henan Taihong New Material Co ltd
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Henan Taihong New Material Co ltd
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    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
    • 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
    • C22F1/057—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 copper as the next major constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Chemical & Material Sciences (AREA)
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  • Physics & Mathematics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a charging pile aluminum alloy plate for a new energy vehicle and a preparation method thereof. The aluminum alloy plate comprises the following elements and the content of the elements is less than or equal to 0.1% of Si, 0.15-0.18% of Fe, 0.21-0.23% of Cu, less than or equal to 0.01% of Mn, less than or equal to 0.01% of Mg, less than or equal to 0.01% of Cr, less than or equal to 0.01% of Zn, 0.01-0.15% of Ti and the balance of Al. Adding raw materials of an aluminum ingot, an Al-Cu75 ingot, a pure magnesium ingot, an Al-Cr75 alloy ingot, a Zn alloy ingot and a 5Ti-1B titanium boron wire into a smelting furnace for smelting, sequentially refining and casting alloy liquid obtained after smelting, and sequentially sawing and milling the head and the surface of the obtained cast ingot, soaking, heating and hot rolling and annealing to obtain the product of the charging pile aluminum alloy plate. The aluminum alloy product for the charging pile, which is high in strength, smooth, free of holes and slag in the interior, high in conductivity and high in stability, is prepared by the method.

Description

Charging pile aluminum alloy plate for new energy vehicle and preparation method thereof
The technical field is as follows:
the invention belongs to the technical field of aluminum alloy, and particularly relates to a charging pile aluminum alloy plate for a new energy vehicle and a preparation method thereof.
Secondly, background art:
under the big background of global energy crisis and serious environmental crisis, China actively promotes the application and development of new energy vehicles, and electric vehicles as green vehicles with wide development prospect can be popularized extremely rapidly in future and have extremely huge market prospect in the future. The charging pile is used as an important matched infrastructure charging facility necessary for developing the electric automobile, and has very important social benefit and economic benefit.
The charging pile is used as an energy supply device of the electric automobile, is similar to an oiling machine in a gas station, can be installed in parking lots or charging stations of public buildings and residential quarters, and is used for charging various electric automobiles meeting the charging connection standard. The intelligent charging pile responds to the call of national energy conservation, environmental protection and green travel, provides two charging modes of slow charging and quick charging for vast users, and various types of charging piles such as portable, wall-hanging and floor-type charging piles comprise an intelligent 7kw alternating-current charging pile, and an intelligent 60kw/120kw direct-current integrated charging pile meets the market requirements of rapid, economic and intelligent operation management in the new energy automobile industry. The quick, efficient, safe and reasonable electricity supply to the power battery is realized, and the electricity purchasing terminal can be used for timing, electricity metering and money metering charging; simultaneously, for efficiency and the practicality that improves public charging stake, have a function that fills more.
Thirdly, the invention content:
the technical problem to be solved by the invention is as follows: according to the requirements of rapid development of new energy automobiles on charging piles at present, the invention provides a charging pile aluminum alloy plate for the new energy automobiles and a preparation method thereof. According to the technical scheme, the aluminum alloy for the charging pile, which is high in strength, smooth, free of holes and slag inside and high in conductivity and stability, is prepared through the working procedures of smelting, casting, surface milling, homogenizing heat treatment, heating, hot rough rolling and annealing.
In order to solve the problems, the invention adopts the technical scheme that:
the invention provides a charging pile aluminum alloy plate for a new energy vehicle, which comprises the following elements in percentage by mass: less than or equal to 0.1 percent of Si, 0.15 to 0.18 percent of Fe, 0.21 to 0.23 percent of Cu, less than or equal to 0.01 percent of Mn, less than or equal to 0.01 percent of Mg, less than or equal to 0.01 percent of Cr, less than or equal to 0.01 percent of Zn, 0.01 to 0.15 percent of Ti, and the balance of Al.
In addition, the preparation method of the charging pile aluminum alloy plate for the new energy vehicle is provided, and comprises the following steps:
a. smelting: adding an aluminum ingot with the purity of 99.85%, an additive Al-Cu75 with the Cu content of 75% by mass, a pure magnesium ingot with the purity of 99.98%, an additive Al-Cr75 with the Cr content of 75% by mass, a Zn alloy ingot with the purity of 99.98% and a 5Ti-1B titanium boron wire into a smelting furnace, heating to 720-760 ℃ for smelting, wherein the smelting time is 4.5-5.5 hours; refining is carried out after smelting, smelting is carried out for 0.5-1 h after refining, smelting in the smelting furnace is completed, alloy liquid is obtained, and the obtained alloy liquid meets the content requirements of all elements in the charging pile aluminum alloy plate;
b. refining: b, placing the alloy liquid obtained in the step a into a standing furnace for refining, wherein the refining temperature is 720-740 ℃, the refining time is 30-50 min, removing floating slag after refining, standing for 20-40 min, and finishing smelting in the standing furnace after standing;
c. casting: b, introducing the alloy liquid refined in the step b into a primary filtering device for filtering, introducing the alloy liquid into an online degassing device for online degassing after primary filtering, and then sequentially performing secondary filtering and tertiary filtering to remove aluminum slag with the diameter less than or equal to 0.005 mm; casting the filtered alloy liquid, controlling the casting temperature to be 695-715 ℃ and the casting time to be 1.5-2.0 h, and obtaining a cast ingot after casting;
d. sawing a head and milling a surface: sawing and milling the obtained cast ingot, wherein the length of the saw head is 180mm, the milling amount of the large surface on one side is more than or equal to 15mm, the milling amount of the small surface on one side is more than or equal to 12mm, and the thickness difference of two sides of the cast ingot is less than or equal to 3 mm;
e. soaking treatment: carrying out soaking treatment on the cast ingot obtained after surface milling;
f. hot rolling: placing the aluminum alloy subjected to soaking treatment to room temperature, then carrying out soaking treatment on the cast ingot, carrying out hot rough rolling after treatment, and lubricating and cooling by using an emulsion to obtain an aluminum alloy plate;
g. annealing: naturally cooling the obtained aluminum alloy plate to room temperature, then carrying out annealing treatment, discharging the treated aluminum alloy plate out of the furnace, and naturally cooling to obtain the product of the charging pile aluminum alloy plate.
According to the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, in the refining process in the step a, a raw material composition is prepared by adopting a raw material formula which is 1: 9, refining the nitrogen-chlorine mixed gas at the refining temperature of 720-760 ℃ for 25-35 min.
According to the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, in the refining process in the step b, the raw materials are prepared by the following steps of: 9, refining the nitrogen-chlorine mixed gas.
According to the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, in the step c, the precision of the filter plate of the primary filter device is 50 PPi; carrying out online degassing on the alloy liquid by using high-purity argon with the purity of 99.999%, wherein the rotating speed of a graphite rotor during online degassing is 440-480 r/min, and the hydrogen content after online degassing is less than or equal to 0.15ml/100 gAl; the precision of the filter plate of the secondary filtration is 60PPi, and the device adopted by the tertiary filtration is a 22-tube tubular filtration device.
According to the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, in the soaking treatment in the step e, the furnace gas constant temperature is 490 ℃, the furnace temperature reaches 490 ℃, heat preservation is started, the temperature is maintained for 2.5 hours, the furnace gas temperature is changed to 455 ℃ after the heat preservation time is reached, the heat preservation is started when the measured metal temperature reaches 455 ℃, the temperature is maintained for 5 hours, and when the measured metal temperature is stabilized at 450-460 ℃, the aluminum alloy plate is taken out of the furnace and is naturally cooled.
According to the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, during soaking treatment in the step f, the obtained cast ingot is put into a push type heating furnace, the furnace gas is set to be 450 ℃, the metal temperature reaches 390-400 ℃, the heat is preserved for 4-8 hours, the furnace gas is set to be 450 ℃, and the metal temperature reaches 415-425 ℃ before discharging and rolling.
According to the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, in the step f, hot rough rolling is carried out on the hot rolled aluminum alloy plate by adopting a 1+1 hot continuous rolling mill, the hot rough rolling is cogging at 415-425 ℃, the rough rolling is carried out by 13-15 reversible rolling passes, the rolling thickness of each pass is 25-50 mm, and the thickness of a rough rolled finished product is 23-50 mm; the final rolling temperature after the hot rough rolling is 300-330 ℃;
the emulsion pressure adopted by the hot rough rolling is 0.35-0.45 Mpa, the emulsion temperature during the hot rough rolling is 60-65 ℃, and the mass concentration is 4.0-5.0%.
According to the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, in the step g, a box type resistance furnace is adopted for annealing treatment, the constant temperature of the furnace gas is 180 ℃, and the temperature of metal reaches 160-170 ℃ and is kept for 180 min.
The invention has the following positive beneficial effects:
1. according to the technical scheme, in the casting process, an efficient and convenient degassing and deslagging method is adopted, and degassing and three-stage filtration are performed simultaneously in the casting process, so that the content of hydrogen in the obtained alloy liquid is effectively reduced, the oxidizing slag is completely removed, the content of impurities in aluminum is controlled within 0.005mm, and the internal defects of the aluminum alloy for the charging pile 1070 caused by the generation of holes and pinholes are effectively prevented.
2. The thick aluminum alloy plate for the charging pile prepared by the technical scheme of the invention has no holes and slag inclusion, the internal flaw detection of the thick plate with the thickness of 22-50 mm reaches A-AA level, the defects of internal holes, slag inclusion and the like are completely avoided, and the smooth propulsion of the aluminum alloy industry for the charging pile can be completely met; the charging pile manufactured by the invention has the advantages of uniform forming relieved teeth, quick, efficient and safe charging, long service life and the like.
3. In the preparation process of the aluminum alloy plate of the charging pile for the new energy vehicle, the segregation of ingot components is effectively eliminated, the internal stress of the ingot is reduced, and the chemical components are uniform through a well-controlled soaking process; the hot rolling adopts 13-15 times of large reduction rolling to completely crush internal grains, so that internal defects such as large grains and loose tissues are eliminated, and finally the obtained thick plate product for the charging pile is greatly improved.
4. The performance of 1070 alloy H112 prepared by the invention in a H112 state is uniform and has great relation with low-temperature stabilization treatment, the annealing by adopting a box type resistance furnace has the advantages of high temperature rise speed, small temperature difference of each area in the furnace, uniform heating of the product and the like, and the performance of the annealed product is uniform, thereby completely meeting the relevant use requirements of the aluminum alloy for the charging pile.
5. The H112-state finished product of the aluminum alloy material for the charging pile, which is prepared by the invention, has the advantages of tensile strength of 65-90 Mpa, elongation rate of more than 45%, yield strength of more than 50Mpa, Babbitt hardness of 35-45, uniform performance and hardness, and capability of effectively improving the uniformity of a shovel tooth of the charging pile and the stability of the charging process.
Fourthly, the specific implementation mode:
the invention is further illustrated by the following examples, which do not limit the scope of the invention.
Example 1:
the charging pile aluminum alloy plate for the new energy vehicle comprises the following elements in percentage by mass: 0.07% of Si, 0.16% of Fe, 0.22% of Cu, 0.005% of Mn, 0.008% of Mg, 0.008% of Cr, 0.007% of Zn, 0.018% of Ti and the balance of Al.
Example 2:
the charging pile aluminum alloy plate for the new energy vehicle comprises the following elements in percentage by mass: 0.05% of Si, 0.15% of Fe, 0.21% of Cu, 0.008% of Mn, 0.006% of Mg, 0.009% of Cr, 0.008% of Zn, 0.1% of Ti and the balance of Al.
Example 3:
the charging pile aluminum alloy plate for the new energy vehicle comprises the following elements in percentage by mass: 0.06% of Si, 0.17% of Fe, 0.21% of Cu, 0.009% of Mn, 0.007% of Mg, 0.007% of Cr, 0.006% of Zn, 0.08% of Ti and the balance of Al.
Example 4:
the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, disclosed by the embodiment 1 of the invention, comprises the following detailed steps:
a. smelting: adding an aluminum ingot with the purity of 99.85 percent, an additive Al-Cu75 with the Cu content of 75 percent by mass, a pure magnesium ingot with the purity of 99.98 percent, an additive Al-Cr75 with the Cr content of 75 percent by mass, a Zn alloy ingot with the purity of 99.98 percent and a 5Ti-1B titanium boron wire into a smelting furnace, and then heating to 740 ℃ for smelting for 5 hours; refining for 30min (refining operation is carried out by adopting nitrogen-chlorine mixed gas with the volume ratio of 1: 9) at the temperature condition after smelting, continuously smelting for 0.5h after refining, finishing smelting in a smelting furnace, and obtaining alloy liquid, wherein the obtained alloy liquid meets the content requirements of all elements in the charging pile aluminum alloy plate in the embodiment 1;
b. refining: b, placing the alloy liquid obtained in the step a into a standing furnace for refining at the refining temperature of 730-740 ℃ for 45min (refining operation is carried out by adopting nitrogen-chlorine mixed gas with the volume ratio of 1: 9), removing floating slag after refining, standing for 30min, and finishing smelting in the standing furnace after standing;
c. casting: b, introducing the alloy liquid refined in the step b into a primary filtering device for filtering, introducing the alloy liquid into an online degassing device for online degassing after primary filtering, and then sequentially performing secondary filtering and tertiary filtering to remove aluminum slag with the diameter less than or equal to 0.005 mm; casting the alloy liquid obtained after filtering to obtain a cast ingot with the thickness of 620mm and the width of 1330 mm;
the precision of a filter plate of the primary filter device is 50 PPi; carrying out online degassing on the alloy liquid by using high-purity argon with the purity of 99.999%, wherein the rotating speed of a graphite rotor during online degassing is 450-460 r/min, and the hydrogen content after online degassing is less than or equal to 0.15ml/100 gAl; the precision of the filter plate of the secondary filtration is 60PPi, and the device adopted by the tertiary filtration is a 22-tube type filtration device;
in the casting process, the casting temperature is controlled to be 715 ℃, the casting time is 2.0h, the casting water temperature is 30 ℃, and the casting water pressure is 0.6kg/cm2Casting speed of 40mm/min, casting water flow 200m3/h；
d. Sawing a head and milling a surface: sawing and milling the obtained cast ingot, wherein the length of the saw head is 180mm, the milling amount of the large surface on one side is 15mm, the milling amount of the small surface on one side is 17mm, and the thickness difference of the two sides of the cast ingot is less than or equal to 3 mm;
e. soaking treatment: carrying out soaking treatment on the cast ingot obtained after surface milling;
during soaking treatment, the furnace gas constant temperature is 490 ℃, the furnace temperature is 490 ℃, heat preservation is started when the furnace temperature reaches 490 ℃, heat preservation is carried out for 2.5 hours, the furnace gas temperature is changed to 455 ℃ after the heat preservation time is reached, heat preservation is started when the measured metal temperature is 455 ℃, heat preservation is carried out for 5 hours, and when the measured metal temperature is stabilized at 450-460 ℃, the furnace is taken out for natural cooling;
f. hot rolling: placing the aluminum alloy subjected to soaking treatment to room temperature, then carrying out soaking treatment on the cast ingot, carrying out hot rough rolling after treatment, and lubricating and cooling by using an emulsion to obtain an aluminum alloy plate;
during soaking treatment, the obtained cast ingot is put into a push type heating furnace, the furnace gas temperature is set to 450 ℃, the metal temperature reaches 395 ℃, the temperature is kept for 6 hours, the furnace gas temperature is set to 450 ℃, and the metal temperature reaches 420 ℃, and then the cast ingot is taken out of the furnace for rolling;
the hot rolling is carried out by adopting a 1+1 hot continuous rolling mill for hot rough rolling, the hot rough rolling is cogging under the condition of 420 ℃, the rough rolling is carried out by 14-pass reversible rolling, the pass distribution is 590 → 550 → 510 → 470 → 430 → 380 → 340 → 260 → 220 → 180 → 140 → 104 → 74 → 46mm, the 12 th pass of rolling is followed by head cutting and edge rolling, and the finished product is sliced according to the thickness 46 x 1296 and 7200 mm; the thickness of the rough rolling finished product is 46 mm; the finishing temperature after the hot rough rolling is 310 ℃;
the emulsion pressure adopted by the hot rough rolling is 0.40Mpa, the emulsion temperature during the hot rough rolling is 62 ℃, and the mass concentration is 4.5%;
g. annealing: naturally cooling the obtained aluminum alloy plate to room temperature, then carrying out annealing treatment (annealing treatment is carried out by adopting a box type resistance furnace, the constant temperature of furnace gas is 180 ℃, the metal temperature reaches 165 ℃, and keeping the temperature for 180min), discharging the aluminum alloy plate out of the furnace after treatment, and naturally cooling to obtain the product of the charging pile aluminum alloy plate.
Example 5:
the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, provided by the embodiment 2, comprises the following detailed steps:
a. smelting: adding an aluminum ingot with the purity of 99.85 percent, an additive Al-Cu75 with the Cu content of 75 percent by mass, a pure magnesium ingot with the purity of 99.98 percent, an additive Al-Cr75 with the Cr content of 75 percent by mass, a Zn alloy ingot with the purity of 99.98 percent and a 5Ti-1B titanium boron wire into a smelting furnace, and then heating to 740 ℃ for smelting for 5 hours; refining for 30min (refining operation is carried out by adopting nitrogen-chlorine mixed gas with the volume ratio of 1: 9) at the temperature condition after smelting, continuously smelting for 0.5h after refining, finishing smelting in a smelting furnace, and obtaining alloy liquid, wherein the obtained alloy liquid meets the content requirements of all elements in the charging pile aluminum alloy plate in the embodiment 2;
b. refining: b, placing the alloy liquid obtained in the step a into a standing furnace for refining at the refining temperature of 730-740 ℃ for 45min (refining operation is carried out by adopting nitrogen-chlorine mixed gas with the volume ratio of 1: 9), removing floating slag after refining, standing for 30min, and finishing smelting in the standing furnace after standing;
c. casting: b, introducing the alloy liquid refined in the step b into a primary filtering device for filtering, introducing the alloy liquid into an online degassing device for online degassing after primary filtering, and then sequentially performing secondary filtering and tertiary filtering to remove aluminum slag with the diameter less than or equal to 0.005 mm; casting the alloy liquid obtained after filtering to obtain a cast ingot with the thickness of 620mm and the width of 1330 mm;
the precision of a filter plate of the primary filter device is 50 PPi; carrying out online degassing on the alloy liquid by using high-purity argon with the purity of 99.999%, wherein the rotating speed of a graphite rotor during online degassing is 450-460 r/min, and the hydrogen content after online degassing is less than or equal to 0.15ml/100 gAl; the precision of the filter plate of the secondary filtration is 60PPi, and the device adopted by the tertiary filtration is a 22-tube type filtration device;
in the casting process, the casting temperature is controlled to be 710 ℃, the casting time is 1.8h, the casting water temperature is 30 ℃, and the casting water pressure is 0.6kg/cm2The casting speed is 40mm/min,Casting water flow of 200m3/h；
d. Sawing a head and milling a surface: sawing and milling the obtained cast ingot, wherein the length of the saw head is 180mm, the milling amount of the large surface on one side is 15mm, the milling amount of the small surface on one side is 17mm, and the thickness difference of the two sides of the cast ingot is less than or equal to 3 mm;
e. soaking treatment: carrying out soaking treatment on the cast ingot obtained after surface milling;
during soaking treatment, the furnace gas constant temperature is 490 ℃, the furnace temperature is 490 ℃, heat preservation is started when the furnace temperature reaches 490 ℃, heat preservation is carried out for 2.5 hours, the furnace gas temperature is changed to 455 ℃ after the heat preservation time is reached, heat preservation is started when the measured metal temperature is 455 ℃, heat preservation is carried out for 5 hours, and when the measured metal temperature is stabilized at 450-460 ℃, the furnace is taken out for natural cooling;
f. hot rolling: placing the aluminum alloy subjected to soaking treatment to room temperature, then carrying out soaking treatment on the cast ingot, carrying out hot rough rolling after treatment, and lubricating and cooling by using an emulsion to obtain an aluminum alloy plate;
during soaking treatment, the obtained cast ingot is put into a push type heating furnace, the furnace gas temperature is set to 450 ℃, the metal temperature reaches 395 ℃, the temperature is kept for 6 hours, the furnace gas temperature is set to 450 ℃, and the metal temperature reaches 420 ℃, and then the cast ingot is taken out of the furnace for rolling;
the hot rolling is carried out by adopting a 1+1 hot continuous rolling mill for hot rough rolling, the hot rough rolling is cogging at the temperature of 420 ℃, 15 passes of rough rolling are carried out, the reversible rolling pass is divided into 590 → 550 → 510 → 470 → 430 → 380 → 340 → 260 → 220 → 182 → 147 → 112 → 82 → 52 → 22mm, the head cutting and the edge rolling are carried out after the 12 th pass of rolling, and the finished product is sliced in thickness, wherein the specification is 46 x 1296 and 7200 mm; the thickness of the rough rolling finished product is 22 mm; the finishing temperature after the hot rough rolling is 320 ℃;
the emulsion pressure adopted by the hot rough rolling is 0.40Mpa, the emulsion temperature during the hot rough rolling is 62 ℃, and the mass concentration is 4.5%;
g. annealing: naturally cooling the obtained aluminum alloy plate to room temperature, then carrying out annealing treatment (annealing treatment is carried out by adopting a box type resistance furnace, the constant temperature of furnace gas is 180 ℃, the metal temperature reaches 160 ℃, and the temperature is kept for 180min), discharging the aluminum alloy plate out of the furnace after treatment, and naturally cooling to obtain the product of the charging pile aluminum alloy plate.
Example 6:
the preparation method of the charging pile aluminum alloy plate for the new energy vehicle, provided by the embodiment 3, comprises the following detailed steps:
a. smelting: adding an aluminum ingot with the purity of 99.85 percent, an additive Al-Cu75 with the Cu content of 75 percent by mass, a pure magnesium ingot with the purity of 99.98 percent, an additive Al-Cr75 with the Cr content of 75 percent by mass, a Zn alloy ingot with the purity of 99.98 percent and a 5Ti-1B titanium boron wire into a smelting furnace, and then heating to 740 ℃ for smelting for 5 hours; refining for 30min (refining operation is carried out by adopting nitrogen-chlorine mixed gas with the volume ratio of 1: 9) at the temperature condition after smelting, continuously smelting for 0.5h after refining, finishing smelting in a smelting furnace, and obtaining alloy liquid, wherein the obtained alloy liquid meets the content requirements of all elements in the charging pile aluminum alloy plate in the embodiment 3;
b. refining: b, placing the alloy liquid obtained in the step a into a standing furnace for refining at the refining temperature of 730-740 ℃ for 45min (refining operation is carried out by adopting nitrogen-chlorine mixed gas with the volume ratio of 1: 9), removing floating slag after refining, standing for 30min, and finishing smelting in the standing furnace after standing;
c. casting: b, introducing the alloy liquid refined in the step b into a primary filtering device for filtering, introducing the alloy liquid into an online degassing device for online degassing after primary filtering, and then sequentially performing secondary filtering and tertiary filtering to remove aluminum slag with the diameter less than or equal to 0.005 mm; casting the alloy liquid obtained after filtering to obtain a cast ingot with the thickness of 620mm and the width of 1330 mm;
the precision of a filter plate of the primary filter device is 50 PPi; carrying out online degassing on the alloy liquid by using high-purity argon with the purity of 99.999%, wherein the rotating speed of a graphite rotor during online degassing is 450-460 r/min, and the hydrogen content after online degassing is less than or equal to 0.15ml/100 gAl; the precision of the filter plate of the secondary filtration is 60PPi, and the device adopted by the tertiary filtration is a 22-tube type filtration device;
in the casting process, the casting temperature is controlled to be 700 ℃, the casting time is 1.5h, the casting water temperature is 30 ℃, and the casting water pressure is 0.6kg/cm2The casting speed is 40mm/min, and the casting water flow is 200m3/h；
d. Sawing a head and milling a surface: sawing and milling the obtained cast ingot, wherein the length of the saw head is 180mm, the milling amount of the large surface on one side is 15mm, the milling amount of the small surface on one side is 17mm, and the thickness difference of the two sides of the cast ingot is less than or equal to 3 mm;
e. soaking treatment: carrying out soaking treatment on the cast ingot obtained after surface milling;
during soaking treatment, the furnace gas constant temperature is 490 ℃, the furnace temperature is 490 ℃, heat preservation is started when the furnace temperature reaches 490 ℃, heat preservation is carried out for 2.5 hours, the furnace gas temperature is changed to 455 ℃ after the heat preservation time is reached, heat preservation is started when the measured metal temperature is 455 ℃, heat preservation is carried out for 5 hours, and when the measured metal temperature is stabilized at 450-460 ℃, the furnace is taken out for natural cooling;
f. hot rolling: placing the aluminum alloy subjected to soaking treatment to room temperature, then carrying out soaking treatment on the cast ingot, carrying out hot rough rolling after treatment, and lubricating and cooling by using an emulsion to obtain an aluminum alloy plate;
during soaking treatment, the obtained cast ingot is put into a push type heating furnace, the furnace gas temperature is set to 450 ℃, the metal temperature reaches 395 ℃, the temperature is kept for 6 hours, the furnace gas temperature is set to 450 ℃, and the metal temperature reaches 420 ℃, and then the cast ingot is taken out of the furnace for rolling;
the hot rolling is carried out by adopting a 1+1 hot continuous rolling mill for hot rough rolling, the hot rough rolling is cogging at the temperature of 420 ℃, 15 passes of rough rolling are carried out, the reversible rolling pass is distributed into 590 → 550 → 510 → 470 → 430 → 380 → 340 → 260 → 220 → 182 → 147 → 112 → 82 → 52 → 32mm, the head cutting and the edge rolling are carried out after the 12 th pass of rolling, and the finished product is sliced in thickness, wherein the specification is 46 x 1296 and 7200 mm; the thickness of the rough rolling finished product is 32 mm; the finishing temperature after the hot rough rolling is 315 ℃;
the emulsion pressure adopted by the hot rough rolling is 0.40Mpa, the emulsion temperature during the hot rough rolling is 62 ℃, and the mass concentration is 4.5%;
g. annealing: naturally cooling the obtained aluminum alloy plate to room temperature, then carrying out annealing treatment (annealing treatment is carried out by adopting a box type resistance furnace, the constant temperature of furnace gas is 180 ℃, the metal temperature reaches 170 ℃, and heat preservation is carried out for 180min), discharging the aluminum alloy plate after treatment, and naturally cooling to obtain the product of the charging pile aluminum alloy plate.
The data of the relevant performance tests of the products prepared in the above-mentioned examples of the invention are detailed in table 1.
TABLE 1 relevant Performance test data for products prepared in accordance with the examples of the present invention
Figure BDA0003425879860000121

Claims (9)

1. The utility model provides an automobile-used electric pile aluminum alloy plate that fills of new forms of energy which characterized in that fills electric pile aluminum alloy plate in each element and its mass percent content is: less than or equal to 0.1 percent of Si, 0.15 to 0.18 percent of Fe, 0.21 to 0.23 percent of Cu, less than or equal to 0.01 percent of Mn, less than or equal to 0.01 percent of Mg, less than or equal to 0.01 percent of Cr, less than or equal to 0.01 percent of Zn, 0.01 to 0.15 percent of Ti, and the balance of Al.
2. The preparation method of the charging pile aluminum alloy plate for the new energy vehicle is characterized by comprising the following steps:
a. smelting: adding an aluminum ingot with the purity of 99.85%, an additive Al-Cu75 with the Cu content of 75% by mass, a pure magnesium ingot with the purity of 99.98%, an additive Al-Cr75 with the Cr content of 75% by mass, a Zn alloy ingot with the purity of 99.98% and a 5Ti-1B titanium boron wire into a smelting furnace, heating to 720-760 ℃ for smelting, wherein the smelting time is 4.5-5.5 hours; refining is carried out after smelting, smelting is carried out for 0.5-1 h after refining, smelting in a smelting furnace is completed, alloy liquid is obtained, and the obtained alloy liquid meets the content requirements of all elements in the charging pile aluminum alloy plate in claim 1;
b. refining: b, placing the alloy liquid obtained in the step a into a standing furnace for refining, wherein the refining temperature is 720-740 ℃, the refining time is 30-50 min, removing floating slag after refining, standing for 20-40 min, and finishing smelting in the standing furnace after standing;
c. casting: b, introducing the alloy liquid refined in the step b into a primary filtering device for filtering, introducing the alloy liquid into an online degassing device for online degassing after primary filtering, and then sequentially performing secondary filtering and tertiary filtering to remove aluminum slag with the diameter less than or equal to 0.005 mm; casting the filtered alloy liquid, controlling the casting temperature to be 695-715 ℃ and the casting time to be 1.5-2.0 h, and obtaining a cast ingot after casting;
d. sawing a head and milling a surface: sawing and milling the obtained cast ingot, wherein the length of the saw head is 180mm, the milling amount of the large surface on one side is more than or equal to 15mm, the milling amount of the small surface on one side is more than or equal to 12mm, and the thickness difference of two sides of the cast ingot is less than or equal to 3 mm;
e. soaking treatment: carrying out soaking treatment on the cast ingot obtained after surface milling;
f. hot rolling: placing the aluminum alloy subjected to soaking treatment to room temperature, then carrying out soaking treatment on the cast ingot, carrying out hot rough rolling after treatment, and lubricating and cooling by using an emulsion to obtain an aluminum alloy plate;
g. annealing: naturally cooling the obtained aluminum alloy plate to room temperature, then carrying out annealing treatment, discharging the treated aluminum alloy plate out of the furnace, and naturally cooling to obtain the product of the charging pile aluminum alloy plate.
3. The preparation method of the charging pile aluminum alloy plate for the new energy vehicle as claimed in claim 1, wherein the charging pile aluminum alloy plate comprises the following steps: in the refining process of the step a, the volume ratio of 1: 9, refining the nitrogen-chlorine mixed gas at the refining temperature of 720-760 ℃ for 25-35 min.
4. The preparation method of the charging pile aluminum alloy plate for the new energy vehicle as claimed in claim 1, wherein the charging pile aluminum alloy plate comprises the following steps: in the refining process of the step b, the volume ratio of 1: 9, refining the nitrogen-chlorine mixed gas.
5. The preparation method of the charging pile aluminum alloy plate for the new energy vehicle as claimed in claim 1, wherein the charging pile aluminum alloy plate comprises the following steps: the precision of the filter plate of the primary filter device in the step c is 50 PPi; carrying out online degassing on the alloy liquid by using high-purity argon with the purity of 99.999%, wherein the rotating speed of a graphite rotor during online degassing is 440-480 r/min, and the hydrogen content after online degassing is less than or equal to 0.15ml/100 gAl; the precision of the filter plate of the secondary filtration is 60PPi, and the device adopted by the tertiary filtration is a 22-tube tubular filtration device.
6. The preparation method of the charging pile aluminum alloy plate for the new energy vehicle as claimed in claim 1, wherein the charging pile aluminum alloy plate comprises the following steps: and e, during soaking treatment in the step e, keeping the furnace gas constant temperature at 490 ℃, starting heat preservation when the furnace temperature reaches 490 ℃, preserving heat for 2.5 hours, changing the furnace gas temperature to 455 ℃ after the heat preservation time is reached, starting heat preservation when the actually measured metal temperature reaches 455 ℃, preserving heat for 5 hours, discharging the furnace and naturally cooling when the actually measured metal temperature is stabilized at 450-460 ℃.
7. The preparation method of the charging pile aluminum alloy plate for the new energy vehicle as claimed in claim 1, wherein the charging pile aluminum alloy plate comprises the following steps: and f, during soaking treatment, putting the obtained cast ingot into a push type heating furnace, keeping the furnace gas constant temperature at 450 ℃, keeping the metal temperature at 390-400 ℃, keeping the temperature for 4-8 hours, changing the furnace gas constant temperature to 450 ℃, and taking the cast ingot out of the furnace for rolling when the metal temperature reaches 415-425 ℃.
8. The preparation method of the charging pile aluminum alloy plate for the new energy vehicle as claimed in claim 1, wherein the charging pile aluminum alloy plate comprises the following steps: in the step f, hot rough rolling is carried out on the hot rolled steel by adopting a 1+1 hot continuous rolling mill, cogging is carried out on the hot rough rolling at the temperature of 415-425 ℃, reversible rolling is carried out on 13-15 rough rolling passes, the rolling thickness of each pass is 25-50 mm, and the thickness of a rough rolled finished product is 23-50 mm; the final rolling temperature after the hot rough rolling is 300-330 ℃;
the emulsion pressure adopted by the hot rough rolling is 0.35-0.45 Mpa, the emulsion temperature during the hot rough rolling is 60-65 ℃, and the mass concentration is 4.0-5.0%.
9. The preparation method of the charging pile aluminum alloy plate for the new energy vehicle as claimed in claim 1, wherein the charging pile aluminum alloy plate comprises the following steps: and g, annealing by adopting a box type resistance furnace, keeping the constant temperature of furnace gas at 180 ℃, and keeping the metal temperature at 160-170 ℃ for 180 min.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02240245A (en) * 1989-03-13 1990-09-25 Nippon Foil Mfg Co Ltd Production of aluminum alloy foil for electrolytic capacitor cathode
CN106222498A (en) * 2016-08-29 2016-12-14 河南明泰铝业股份有限公司 A kind of hub of motorcycle aluminium alloy plate and preparation method thereof
CN112680638A (en) * 2020-11-12 2021-04-20 佛山市三水凤铝铝业有限公司 Preparation method of high-efficiency aluminum profile for relieving

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02240245A (en) * 1989-03-13 1990-09-25 Nippon Foil Mfg Co Ltd Production of aluminum alloy foil for electrolytic capacitor cathode
CN106222498A (en) * 2016-08-29 2016-12-14 河南明泰铝业股份有限公司 A kind of hub of motorcycle aluminium alloy plate and preparation method thereof
CN112680638A (en) * 2020-11-12 2021-04-20 佛山市三水凤铝铝业有限公司 Preparation method of high-efficiency aluminum profile for relieving

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