CN113909448A - Preparation method of aluminum alloy die casting for riveting of new energy vehicle and die casting - Google Patents
Preparation method of aluminum alloy die casting for riveting of new energy vehicle and die casting Download PDFInfo
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- CN113909448A CN113909448A CN202111176274.2A CN202111176274A CN113909448A CN 113909448 A CN113909448 A CN 113909448A CN 202111176274 A CN202111176274 A CN 202111176274A CN 113909448 A CN113909448 A CN 113909448A
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- aluminum alloy
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- casting
- new energy
- die casting
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- 238000004512 die casting Methods 0.000 title claims abstract description 51
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003723 Smelting Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910052712 strontium Inorganic materials 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 229910001278 Sr alloy Inorganic materials 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000003607 modifier Substances 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 5
- 238000004321 preservation Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Continuous Casting (AREA)
Abstract
The invention belongs to the technical field of alloy material processing for new energy vehicles, and particularly relates to a preparation method of an aluminum alloy die casting for riveting of a new energy vehicle and the die casting. The preparation method of the aluminum alloy die casting for riveting the new energy vehicle comprises the following steps: s1, smelting the aluminum ingot into alloy liquid; s2, pouring the alloy liquid into a vacuum die-casting die to prepare a blank; and S3, performing heat treatment on the blank. The invention has the beneficial effects that the DIN1706 standard mark die-casting aluminum alloy AlSi10MnMg is adopted, Sr alloy modifier is not required to be added in the material, the solid-state gas content of the prepared aluminum alloy die-casting piece is small through a high vacuum die-casting process and a special heat treatment process, the elongation percentage of the aluminum alloy die-casting piece is relatively close to that of the aluminum alloy section for the new energy to be riveted, and when the aluminum alloy die-casting piece and the aluminum alloy section for the new energy to be riveted are used in a complex environment, especially in a high-expansion-force environment, the riveting part can not be expanded or separated, and the good bonding strength can still be kept.
Description
Technical Field
The invention belongs to the technical field of alloy material processing for new energy vehicles, and particularly relates to a preparation method of an aluminum alloy die casting for riveting of a new energy vehicle and the die casting.
Background
With the increasing competition of automobile manufacturing industry, automobile manufacturers continuously push new automobile models to the market, the main competition focuses on the economy of automobile driving, in the past 20 years of automobile manufacturers, problems are always sought to be solved, and experiments prove that it is effective to realize the lightweight of automobile bodies by using new materials and improve the economy of automobile driving.
The important potential of light weight of automobiles is that a large amount of light metal and nonmetal are used in the manufacturing of automobile bodies, and particularly the advantages of high production efficiency and low cost of die-casting aluminum alloy are already used in batches by various automobile manufacturers. The SPR (self Piercing riveting) technology is widely applied as a connecting method of automobile parts. Self-piercing riveting techniques have been extremely limited in application to die castings because of the mechanical limitations of compression castings.
Most of the existing die-casting aluminum alloy for riveting new energy automobiles is non-high-grade strontium modified alloy (the content of strontium is about 0.3 percent), namely strontium is added into the conventional standard aluminum-silicon alloy, but because the strontium element is easily affected by high temperature during smelting of the die-casting aluminum alloy liquid, the strength of the material is greatly reduced, and the defects of riveting cracking and the like are formed. Strontium content also increases raw material costs. Not only causes the waste of resources, but also greatly increases the manufacturing cost.
Disclosure of Invention
The invention provides a preparation method of an aluminum alloy die casting for riveting a new energy vehicle and the die casting.
In order to solve the technical problem, the invention provides a preparation method of an aluminum alloy die casting for riveting a new energy vehicle, which comprises the following steps:
s1, smelting the aluminum ingot into alloy liquid;
s2, pouring the alloy liquid into a vacuum die-casting die to prepare a blank;
and S3, performing heat treatment on the blank.
In a second aspect, the invention also provides a die casting produced by the production method as described above.
The invention has the beneficial effects that the DIN1706 standard mark die-casting aluminum alloy AlSi10MnMg is adopted, Sr alloy modifier is not required to be added in the material, the solid gas content of the prepared aluminum alloy die-casting piece is small through a high vacuum die-casting process and a special heat treatment process, the elongation rate of the aluminum alloy die-casting piece is relatively close to that of the aluminum alloy section for the new energy to be riveted, when the two connecting pieces are used under a complex environment, particularly under a high expansion force environment, bulging or separation of a riveting part can not occur, good bonding strength can still be kept, and the alloy casting piece obtained after controlling the smelting density index of aluminum liquid and heat treatment has better elongation rate, tensile strength and yield strength.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a preparation method of an aluminum alloy die casting for riveting of a new energy vehicle;
FIG. 2 is a schematic view of riveting of a die casting prepared in example 1 of the present invention;
FIG. 3 is a schematic view of the riveting of a die cast article prepared in comparative example 2 of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.
The invention provides a preparation method of an aluminum alloy die casting for riveting a new energy vehicle, which comprises the following steps:
s1, smelting the aluminum ingot into alloy liquid;
s2, pouring the alloy liquid into a vacuum die-casting die to prepare a blank;
and S3, performing heat treatment on the blank.
Optionally, the aluminum ingot in step S1 is an aluminum ingot meeting DIN1706-2010/EN AC-43500 standard, and the raw materials and the mass percentages of the components are as follows: si: 9-11.5%, Fe: less than or equal to 0.2 percent, Cu: less than or equal to 0.05 percent, Mn: 0.4-0.8%, Mg 0.1-0.6%, Zn: less than or equal to 0.07 percent, Ti: 0.1-0.2%, Sr: 0.01-0.027%, and the balance of Al and inevitable impurities.
Optionally, the melting temperature in step S1 is 720-770 ℃.
After smelting, inert gas is introduced to remove oxides and hydrogen in the aluminum liquid, and an AB duplex heat preservation furnace is used for heat preservation, which is beneficial to reducing the burning loss of trace elements (0.4-0.8% of Mn, 0.1-0.6% of Mg, less than or equal to 0.07% of Zn and 0.1-0.2% of Ti) in the alloy.
Optionally, the density index of the molten aluminum during casting in the step S2 is less than or equal to 0.05%.
Optionally, in step S2, the alloy liquid is poured into a vacuum die-casting mold at 680-720 ℃ for die-casting, which is helpful for improving the mechanical properties of the alloy.
Optionally, the step of heat treatment in step S3 includes: placing the blank in a heat treatment furnace, controlling the temperature to be 300-380 ℃ and the time to be 2-5 h; preferably 4 hours.
The common die casting is not dense inside, and the time-effect temperature of the common die casting does not exceed 200 ℃. The present example uses the above raw materials and production process, and uses heat treatment temperature of 300-380 deg.C, and is carried out at higher temperature than that of ordinary aging, at this time, the alloy keeps higher strength, and the plasticity is improved. The mechanical strength performance required by riveting can be met.
Compared with the aluminum alloy treated by the T5 in the prior art, the heat treatment condition of the invention can completely meet the mechanical property of the die-casting aluminum alloy riveting and ensure that the riveting does not crack. The mechanical properties of the material meet the requirements of tensile strength being more than 120MPa, yield strength being more than 80MPa, elongation being more than 3.5 percent and elastic modulus being 60-75 Gpa.
The invention also provides a die casting prepared by the preparation method.
Example 1
Smelting at the high temperature of 720 ℃, introducing inert gas to remove oxides and hydrogen in the aluminum liquid, preserving heat by using an AB duplex heat preserving furnace, and controlling the density index of the aluminum liquid to be less than or equal to 0.05 percent; pouring the alloy liquid into a vacuum die-casting die at the temperature of 690 ℃ for die-casting; and carrying out heat treatment on the semi-finished product, wherein the temperature of the heat treatment is 300 ℃, and the heat preservation time is 4 h.
The remaining examples and comparative examples were prepared according to the procedure of example 1 and the process conditions are summarized in table 1.
TABLE 1 Process conditions for the examples
The performance of the battery module end plates manufactured in the above embodiments was tested, and the test results are summarized in table 2.
Table 2 performance data of battery module end plates
The invention adopts DIN1706 standard mark die-casting aluminum alloy AlSi10MnMg without adding Sr alloy modifier in the material, and controls the heat treatment temperature to be 300-400 ℃ and the time to be 2-5h in the preparation process through a high vacuum die-casting process and a special heat treatment process, so that the elongation of the material is more than or equal to 3.5 percent, the tensile strength is more than or equal to 160Mpa, and the yield strength is more than or equal to 80 Mpa. By controlling the density index of the aluminum liquid, combining the parameter optimization and the heat treatment process of the die casting process, the die casting aluminum alloy casting is obtained efficiently and at low cost, the non-porous riveting mechanical property is completely met, and the surface of the part has no bubble, bulge and other appearance defects.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The preparation method of the aluminum alloy die casting for riveting the new energy vehicle is characterized by comprising the following steps of:
s1, smelting the aluminum ingot into alloy liquid;
s2, pouring the alloy liquid into a vacuum die-casting die to prepare a blank;
and S3, performing heat treatment on the blank.
2. The method of producing an aluminum alloy die casting according to claim 1,
the aluminum ingot in the step S1 comprises the following raw materials by mass percent: si: 9-11.5%, Fe: less than or equal to 0.2 percent, Cu: less than or equal to 0.05 percent, Mn: 0.4-0.8%, Mg 0.1-0.6%, Zn: less than or equal to 0.07 percent, Ti: 0.1-0.2%, Sr: 0.01-0.027%, and the balance of Al and inevitable impurities.
3. The method of producing an aluminum alloy die casting according to claim 1,
the melting temperature in step S1 is 720-770 ℃.
4. The method of producing an aluminum alloy die casting according to claim 1,
the density index of the aluminum liquid when casting in the step S2 is less than or equal to 0.05 percent.
5. The method of producing an aluminum alloy die casting according to claim 1,
the temperature at the time of pouring in step S2 is 680-720 ℃.
6. The method of producing an aluminum alloy die casting according to claim 1,
the step of heat treatment in step S3 includes:
placing the blank in a heat treatment furnace, and controlling the temperature to be 300-.
7. A die-cast article obtained by the production method as recited in any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111176274.2A CN113909448A (en) | 2021-10-09 | 2021-10-09 | Preparation method of aluminum alloy die casting for riveting of new energy vehicle and die casting |
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| CN202111176274.2A CN113909448A (en) | 2021-10-09 | 2021-10-09 | Preparation method of aluminum alloy die casting for riveting of new energy vehicle and die casting |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0918095A1 (en) * | 1997-11-20 | 1999-05-26 | Alusuisse Technology & Management AG | Structural element made of a die-cast aluminium alloy |
| CN1537961A (en) * | 2003-01-23 | 2004-10-20 | ����Ѷ����������������ι�˾ | Casting alloy |
| US20050167012A1 (en) * | 2004-01-09 | 2005-08-04 | Lin Jen C. | Al-Si-Mn-Mg alloy for forming automotive structural parts by casting and T5 heat treatment |
| EP1719820A2 (en) * | 2005-05-03 | 2006-11-08 | ALUMINIUM RHEINFELDEN GmbH | Aluminium cast alloy |
| CN102206778A (en) * | 2010-03-30 | 2011-10-05 | 本田技研工业株式会社 | Aluminium die casting alloy used as vehicle material |
| WO2015173237A1 (en) * | 2014-05-12 | 2015-11-19 | Jaguar Land Rover Limited | An alloy |
| CN105215314A (en) * | 2015-09-18 | 2016-01-06 | 霍山县龙鑫金属制品有限公司 | A kind of auto parts machinery pressure casting method |
| CN108359855A (en) * | 2018-03-30 | 2018-08-03 | 江苏恒昌铸造科技有限公司 | A kind of aluminum diecasting alloy and its manufacturing process |
| CN108913962A (en) * | 2018-09-27 | 2018-11-30 | 山西瑞格金属新材料有限公司 | A kind of die casting high thermal conductivity aluminium alloy and its heat treatment method |
| CN112779444A (en) * | 2020-12-25 | 2021-05-11 | 宁波旭升汽车技术股份有限公司 | Aluminum alloy die casting for riveting and preparation method thereof |
-
2021
- 2021-10-09 CN CN202111176274.2A patent/CN113909448A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0918095A1 (en) * | 1997-11-20 | 1999-05-26 | Alusuisse Technology & Management AG | Structural element made of a die-cast aluminium alloy |
| CN1537961A (en) * | 2003-01-23 | 2004-10-20 | ����Ѷ����������������ι�˾ | Casting alloy |
| US20050167012A1 (en) * | 2004-01-09 | 2005-08-04 | Lin Jen C. | Al-Si-Mn-Mg alloy for forming automotive structural parts by casting and T5 heat treatment |
| EP1719820A2 (en) * | 2005-05-03 | 2006-11-08 | ALUMINIUM RHEINFELDEN GmbH | Aluminium cast alloy |
| CN102206778A (en) * | 2010-03-30 | 2011-10-05 | 本田技研工业株式会社 | Aluminium die casting alloy used as vehicle material |
| WO2015173237A1 (en) * | 2014-05-12 | 2015-11-19 | Jaguar Land Rover Limited | An alloy |
| CN105215314A (en) * | 2015-09-18 | 2016-01-06 | 霍山县龙鑫金属制品有限公司 | A kind of auto parts machinery pressure casting method |
| CN108359855A (en) * | 2018-03-30 | 2018-08-03 | 江苏恒昌铸造科技有限公司 | A kind of aluminum diecasting alloy and its manufacturing process |
| CN108913962A (en) * | 2018-09-27 | 2018-11-30 | 山西瑞格金属新材料有限公司 | A kind of die casting high thermal conductivity aluminium alloy and its heat treatment method |
| CN112779444A (en) * | 2020-12-25 | 2021-05-11 | 宁波旭升汽车技术股份有限公司 | Aluminum alloy die casting for riveting and preparation method thereof |
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Application publication date: 20220111 |
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