CN112746228A - Hot stamping forming method for 6-series aluminum alloy for automobile - Google Patents
Hot stamping forming method for 6-series aluminum alloy for automobile Download PDFInfo
- Publication number
- CN112746228A CN112746228A CN201911055007.2A CN201911055007A CN112746228A CN 112746228 A CN112746228 A CN 112746228A CN 201911055007 A CN201911055007 A CN 201911055007A CN 112746228 A CN112746228 A CN 112746228A
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- China
- Prior art keywords
- aluminum alloy
- series aluminum
- stamping
- automobile
- controlled
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die quenching
Abstract
The invention relates to a method for hot stamping and forming 6-series aluminum alloy for an automobile, which comprises the steps of solution treatment, cold die stamping, pressure maintaining quenching and aging treatment, and is characterized in that: heating the 6-series aluminum alloy plate to 520-570 ℃, preserving heat for 1-5min, then quickly transferring to a cold die for stamping, introducing cooling water into the die for pressure-maintaining quenching after stamping is finished, cooling the aluminum alloy part to room temperature at the cooling rate of 50-60 ℃/s, and then entering an aging furnace for aging treatment; the method can effectively solve the problem that the 6-series aluminum alloy is easy to crack during the cold stamping forming of the automobile part material, and reduces the production cost.
Description
Technical Field
The invention relates to a hot stamping forming method of 6-series aluminum alloy for an automobile, belonging to the field of plastic forming processing of metal materials.
Background
The 6-series aluminum alloy automobile parts are easy to crack in the cold stamping forming process, and particularly the parts with complex shapes and structures cannot be produced by adopting a cold stamping process.
Disclosure of Invention
In view of the above, the present invention provides a method for hot stamping 6-series aluminum alloy for automobiles, which can effectively improve the forming performance of 6-series aluminum alloy materials and solve the problem of easy cracking during cold stamping of automobile parts.
The invention is realized by adopting the following scheme: a method for hot stamping and forming 6-series aluminum alloy for an automobile comprises the steps of solution treatment, cold die stamping, pressure maintaining quenching and aging treatment, wherein 6-series aluminum alloy plates are heated to 520-570 ℃, heat preservation is carried out for 1-5min, then the 6-series aluminum alloy plates are rapidly transferred to a cold die for stamping, cooling water is introduced into the die for pressure maintaining quenching after stamping is completed, aluminum alloy parts are cooled to room temperature at the cooling rate of 50-60 ℃/s, and then the aluminum alloy parts enter an aging furnace for aging treatment.
Further, the heating rate of the 6-series aluminum alloy plate material heated to 520-570 ℃ is controlled to be 30-35 ℃/s.
Further, the time for transferring and completing the punching is controlled within 10 s.
Furthermore, the time of aging treatment is controlled to be 3-10h, and the temperature is controlled to be 60-90 ℃.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the 6-series cold-rolled aluminum alloy material is heated to the solid solution temperature, so that the material is formed at high temperature while being subjected to solid solution heat treatment, the forming performance of the material is obviously improved, the problem of cracking of the complex automobile part material is solved, and the production cost is reduced.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail by specific embodiments.
Drawings
FIG. 1 is a schematic view of a vehicle part manufactured by the hot press forming method of the present invention.
Detailed Description
The first embodiment is as follows: a method for hot stamping 6 series aluminum alloy for an automobile, wherein the 6 series aluminum alloy is a 6 series cold-rolled aluminum alloy material; heating a 6-series aluminum alloy plate to 560 ℃, preserving heat for 1min, then quickly transferring the plate to a cold die for stamping, introducing cooling water into the die for pressure-maintaining quenching after stamping is finished, cooling an aluminum alloy part to room temperature at a cooling rate of 52 ℃/s, and then entering an aging furnace for aging treatment; the invention relates to a processing method for improving the hot stamping formability of 6 series aluminum alloy for an automobile, belonging to a special processing method for improving the formability of materials.
In the embodiment, the heating rate of heating the 6 series aluminum alloy plate to 560 ℃ is controlled at 34 ℃/s, and an air circulation furnace is adopted for heating, the heating rate is more than 30 ℃/s, the material performance is superior to that of the material produced by a box type annealing furnace in the current market, because the material produced by the box type annealing furnace has low heating rate, large and uneven grain size and poor formability; although the heating rate of the coil produced by the continuous annealing line process can reach more than 30 ℃/s, the production cost is high, and the hot stamping cannot be realized. .
In this embodiment, the time for transferring and completing the press is controlled within 10 s.
In this example, the time of the aging treatment was controlled to 4 hours and the temperature was controlled to 85 ℃.
Example two: a method for hot stamping 6 series aluminum alloy for an automobile, wherein the 6 series aluminum alloy is a 6 series cold-rolled aluminum alloy material; heating a 6-series aluminum alloy plate to 540 ℃, preserving heat for 2min, then quickly transferring the plate to a cold die for stamping, introducing cooling water into the die for pressure-maintaining quenching after stamping is finished, cooling the material to room temperature at a cooling rate of 55 ℃/s, and then entering an aging furnace for aging treatment; the invention relates to a processing method for improving the hot stamping formability of 6 series aluminum alloy for automobiles, which heats a material to a solid solution temperature, completes solid solution heat treatment of the material and simultaneously forms the material at a high temperature, can obviously improve the forming performance of the material, solves the problem of cracking of complex automobile parts and materials, and simultaneously reduces the production cost.
In the embodiment, the heating rate of heating the 6 series aluminum alloy plate to 540 ℃ is controlled at 33 ℃/s, and an air circulation furnace is adopted for heating, the heating rate is more than 30 ℃/s, the material performance is superior to that of the material produced by a box type annealing furnace in the current market, because the material produced by the box type annealing furnace has low heating rate, large and uneven grain size and poor formability; although the heating rate of the coil produced by the continuous annealing line process can reach more than 30 ℃/s, the production cost is high, and the hot stamping cannot be realized.
In this embodiment, the time for transferring and completing the press is controlled within 10 s.
In this example, the time of the aging treatment was controlled at 6 hours and the temperature was controlled at 70 ℃.
Example three: a method for hot stamping 6 series aluminum alloy for an automobile, wherein the 6 series aluminum alloy is a 6 series cold-rolled aluminum alloy material; heating a 6-series aluminum alloy plate to 530 ℃, preserving heat for 4min, then quickly transferring the plate to a cold die for stamping, introducing cooling water into the die for pressure-maintaining quenching after stamping is finished, cooling the material to room temperature at a cooling rate of 58 ℃/s, and then entering an aging furnace for aging treatment; the invention relates to a processing method for improving the hot stamping formability of 6 series aluminum alloy for automobiles, which heats a material to a solid solution temperature, completes solid solution heat treatment of the material and simultaneously forms the material at a high temperature, can obviously improve the forming performance of the material, solves the problem of cracking of complex automobile parts and materials, and simultaneously reduces the production cost.
In the embodiment, the heating rate of heating the 6 series aluminum alloy plate to 530 ℃ is controlled at 32 ℃/s, and an air circulation furnace is adopted for heating, the heating rate is more than 30 ℃/s, the material performance is superior to that of the material produced by a box type annealing furnace in the current market, because the material produced by the box type annealing furnace has low heating rate, large and uneven grain size and poor formability; although the heating rate of the coil produced by the continuous annealing line process can reach more than 30 ℃/s, the production cost is high, and the hot stamping cannot be realized.
In this embodiment, the time for transferring and completing the press is controlled within 10 s.
In this example, the time of the aging treatment was controlled at 8 hours and the temperature was controlled at 65 ℃.
Fig. 1 is a schematic view of a vehicle part (door inner panel) obtained by hot press forming of a 6-series aluminum alloy for a vehicle according to the present invention, in which a steel sheet is used for the first stage of the part, and a 6-series aluminum alloy is used for the second stage of the part to reduce the weight, but the part has a problem of cracking, in which the 6-series aluminum alloy material has a fracture elongation of only about 25% in a cold state, and the fracture elongation can be 50% or more in a hot state at the time of hot press forming. The hot stamping forming method of the invention not only solves the cracking problem, but also reduces the weight by 50 percent.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (4)
1. A method for hot stamping 6 series aluminum alloy for automobiles is characterized in that: the method comprises the steps of solution treatment, cold die stamping, pressure maintaining quenching and aging treatment, and is characterized in that: heating the 6-series aluminum alloy plate to 520-570 ℃, preserving heat for 1-5min, then quickly transferring to a cold die for stamping, introducing cooling water into the die for pressure-maintaining quenching after stamping is finished, cooling the aluminum alloy part to room temperature at the cooling rate of 50-60 ℃/s, and then entering an aging furnace for aging treatment.
2. The method for hot press forming a 6-series aluminum alloy for an automobile according to claim 1, wherein: the heating rate of the 6-series aluminum alloy plate is controlled to be 30-35 ℃/s when the temperature of the 6-series aluminum alloy plate is heated to 520-570 ℃.
3. The method for hot press forming a 6-series aluminum alloy for an automobile according to claim 1, wherein: the time for transferring and completing the punching is controlled within 10 s.
4. The method for hot press forming a 6-series aluminum alloy for an automobile according to claim 1, wherein: the time of the aging treatment is controlled to be 3-10h, and the temperature is controlled to be 60-90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911055007.2A CN112746228A (en) | 2019-10-31 | 2019-10-31 | Hot stamping forming method for 6-series aluminum alloy for automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911055007.2A CN112746228A (en) | 2019-10-31 | 2019-10-31 | Hot stamping forming method for 6-series aluminum alloy for automobile |
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| CN112746228A true CN112746228A (en) | 2021-05-04 |
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| CN201911055007.2A Pending CN112746228A (en) | 2019-10-31 | 2019-10-31 | Hot stamping forming method for 6-series aluminum alloy for automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114045450A (en) * | 2021-11-29 | 2022-02-15 | 天津航天长征火箭制造有限公司 | Thermal deformation quenching composite forming method for aerospace aluminum alloy curved surface piece |
| CN115945571A (en) * | 2023-01-18 | 2023-04-11 | 上海新顿长菁科技有限公司 | Hot forming process of 6XXX series aluminum alloy, parts made by hot forming process and application of hot forming process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012001020A1 (en) * | 2011-01-24 | 2012-08-09 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | PUNCHES OF CURABLE ALUMINUM ALLOYING PLATE |
| CN107502842A (en) * | 2017-10-20 | 2017-12-22 | 吉林大学 | A kind of 6 systems and the supper-fast solid solution treatment method of 7 line aluminium alloys |
| CN107686954A (en) * | 2017-07-18 | 2018-02-13 | 北京科技大学 | A kind of heat treatment method for improving 7075 aluminum alloy heat press formabilities |
-
2019
- 2019-10-31 CN CN201911055007.2A patent/CN112746228A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012001020A1 (en) * | 2011-01-24 | 2012-08-09 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | PUNCHES OF CURABLE ALUMINUM ALLOYING PLATE |
| CN107686954A (en) * | 2017-07-18 | 2018-02-13 | 北京科技大学 | A kind of heat treatment method for improving 7075 aluminum alloy heat press formabilities |
| CN107502842A (en) * | 2017-10-20 | 2017-12-22 | 吉林大学 | A kind of 6 systems and the supper-fast solid solution treatment method of 7 line aluminium alloys |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114045450A (en) * | 2021-11-29 | 2022-02-15 | 天津航天长征火箭制造有限公司 | Thermal deformation quenching composite forming method for aerospace aluminum alloy curved surface piece |
| CN115945571A (en) * | 2023-01-18 | 2023-04-11 | 上海新顿长菁科技有限公司 | Hot forming process of 6XXX series aluminum alloy, parts made by hot forming process and application of hot forming process |
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