CN112746202A - Aluminum alloy sheet for automobile body and production method thereof - Google Patents
Aluminum alloy sheet for automobile body and production method thereof Download PDFInfo
- Publication number
- CN112746202A CN112746202A CN202011602402.0A CN202011602402A CN112746202A CN 112746202 A CN112746202 A CN 112746202A CN 202011602402 A CN202011602402 A CN 202011602402A CN 112746202 A CN112746202 A CN 112746202A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- room temperature
- sheet
- alloy sheet
- rolled plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Abstract
The aluminum alloy sheet for the automobile body comprises the following chemical components in percentage by weight: 1.4-1.5% of Si, 0.1-0.4% of Fe, 0-0.2% of Cu, 0.03-0.17% of Mn, 0.63-0.68% of Mg, 0.1-0.15% of Cr, 0.01-0.02% of Ti, 0-0.10% of Zn and the balance of Al; a production method of an aluminum alloy sheet for an automobile body comprises the following steps: the method comprises the steps of ingot preparation, hot rolling, intermediate annealing, cold rolling, solution treatment, room temperature placement, pre-aging treatment and room temperature placement. The aluminum alloy sheet for the automobile body is produced by the technical scheme of the invention, a homogenization treatment process is omitted on the basis of the traditional processing method, hot rolling is directly carried out, so that the deep drawing performance and the baking hardenability of the alloy sheet are improved, the production flow is obviously shortened, the energy is saved, the production cost is greatly reduced, and the stamping formability and the baking hardenability of the alloy sheet are improved.
Description
Technical Field
The invention relates to the technical field of aluminum plates for automobiles, in particular to an aluminum alloy sheet for an automobile body and a production method thereof.
Background
Energy conservation, emission reduction and light weight of automobiles have become a global trend. Through research and development of lightweight materials for automobiles for decades, 6016(Al — Mg — Si series) alloy is gradually considered as an optimal aluminum alloy material for automobile body panels. It not only has comprehensive mechanical property and forming property, but also can strengthen the aluminum alloy by heat treatment, and has better Baking Hardening (BH) property than other aluminum alloys. As an automobile outer panel, it is necessary to have dent resistance, formability, aging stability, surface finish and bake hardenability of the alloy material.
The production method of the 6016 aluminum alloy sheet for the CN104561681A automobile body and the production method thereof are described in the patent, and the production method comprises the process steps of smelting, casting, face milling, hot rolling, cold rolling and heat treatment, so that the HB front elongation and HB rear yield strength of the aluminum alloy sheet are improved, the yield in stamping is improved, the automobile wide-family cost is reduced, and the formability and the baking fracture property of the aluminum alloy sheet are improved. However, such panels can only be used as automobile inner panels or low-cost automobile outer panels.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an aluminum alloy sheet for an automobile body and a production method thereof.
The invention is realized by the following technical scheme:
the aluminum alloy sheet for the automobile body comprises the following chemical components in percentage by weight: 1.4-1.5% of Si, 0.1-0.4% of Fe, 0-0.2% of Cu, 0.03-0.17% of Mn, 0.63-0.68% of Mg, 0.1-0.15% of Cr, 0.01-0.02% of Ti, 0-0.10% of Zn and the balance of Al.
A production method of an aluminum alloy sheet for an automobile body comprises the following steps:
A. preparing an ingot: preparing an aluminum alloy ingot;
B. hot rolling: heating an aluminum alloy ingot to 510-530 ℃, preserving heat for 4-7 h, and then carrying out hot rolling to obtain a hot rolled plate with the thickness of 4-6 mm;
C. intermediate annealing: keeping the temperature of the hot rolled plate at 540-550 ℃ for 4-7 h, and then cooling the hot rolled plate to room temperature to obtain a furnace-cooled rolled plate;
D. cold rolling: cold rolling the annealed rolled sheet to obtain a cold-rolled sheet with the thickness of 0.9-1.2 mm;
E. solution treatment: carrying out solution treatment on the cold-rolled sheet to form a rolled sheet after the solution treatment; the temperature of the solution treatment is 550-570 ℃, the time is 8-10 min, and the cooling mode is water quenching to room temperature;
F. standing at room temperature: standing the rolled plate after the solution treatment at room temperature for 30-50 min;
G. pre-aging treatment: placing the rolled plate at room temperature, and performing pre-aging treatment to form a pre-aged rolled plate; the pre-aging treatment temperature is 150-170 ℃, the time is 10-15 min, and the cooling mode is air cooling to room temperature;
H. standing at room temperature: and (4) placing the pre-aged rolled plate at room temperature for more than 4 weeks to obtain the aluminum alloy sheet for the automobile body.
In order to further implement the present invention, the following technical solutions may be preferably selected:
preferably, the aluminum alloy ingot in the step A is prepared by semi-continuous casting.
Preferably, the aluminum alloy cast ingot is subjected to head cutting and face milling treatment before heating, the hot rolling mode is combination of transverse rolling and longitudinal rolling, and the hot rolling process comprises rolling for 6-8 times along the width direction of the cast ingot and then rolling for 10-15 times along the length direction of the flat ingot to obtain a hot rolled plate.
Preferably, the thickness of the aluminum alloy cast ingot is 190mm, the thickness of the hot rolled plate is 4-6 mm, and the thickness of the cold rolled plate is 0.9-1.2 mm.
Through the technical scheme, the invention has the beneficial effects that:
the invention saves the homogenization treatment process on the basis of the traditional processing method and directly carries out hot rolling; in order to promote the dissolution of soluble alloy phase, the spheroidization of the particles of the excessive fragmentation crystal phase and the smoothness of the boundary, so as to improve the deep drawing performance and the bake hardenability of the alloy plate, a process method of further increasing the intermediate annealing temperature and properly prolonging the intermediate annealing heat preservation time on the basis of the conventional intermediate annealing treatment (420-440 ℃ for 1-2 hours) is adopted; the method can obviously shorten the production flow of the aluminum alloy automobile body plate, save energy, greatly reduce the production cost and simultaneously improve the stamping formability and the baking hardenability of the alloy plate.
Compared with the prior art, the invention has the advantages that: the plate is prepared by adopting non-homogenization treatment, so that the energy is saved, the efficiency is improved, and the production cost is reduced; the method can be implemented on the existing aluminum alloy production line, the existing tool is not required to be changed, the equipment and process investment is not required to be increased, and the operation is simple, convenient and feasible; the intermediate annealing temperature is increased, the annealing heat preservation time is properly prolonged, the soluble crystal phase is dissolved, and the particle boundary of the excessive crystal phase is smooth and spheroidized, so that the stamping formability and the baking finish hardenability of the aluminum alloy sheet are finally improved at the same time. The method realizes that the deep drawing performance and the baking hardening performance of the plate are improved while the cost of the aluminum alloy automobile body plate is reduced, thereby bringing considerable social and economic benefits.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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:
the aluminum alloy sheet for the automobile body comprises the following chemical components in percentage by weight: 1.4-1.5% of Si, 0.1-0.4% of Fe, 0-0.2% of Cu, 0.03-0.17% of Mn, 0.63-0.68% of Mg, 0.1-0.15% of Cr, 0.01-0.02% of Ti, 0-0.10% of Zn and the balance of Al.
2. A method for producing an aluminum alloy sheet for automobile bodies as recited in claim 1, comprising the steps of:
A. preparing an ingot: preparing an aluminum alloy ingot;
B. hot rolling: heating an aluminum alloy ingot to 510-530 ℃, preserving heat for 4-7 h, and then carrying out hot rolling to obtain a hot rolled plate with the thickness of 4-6 mm;
C. intermediate annealing: keeping the temperature of the hot rolled plate at 540-550 ℃ for 4-7 h, and then cooling the hot rolled plate to room temperature to obtain a furnace-cooled rolled plate;
D. cold rolling: cold rolling the annealed rolled sheet to obtain a cold-rolled sheet with the thickness of 0.9-1.2 mm;
E. solution treatment: carrying out solution treatment on the cold-rolled sheet to form a rolled sheet after the solution treatment; the temperature of the solution treatment is 550-570 ℃, the time is 8-10 min, and the cooling mode is water quenching to room temperature;
F. standing at room temperature: standing the rolled plate after the solution treatment at room temperature for 30-50 min;
G. pre-aging treatment: placing the rolled plate at room temperature, and performing pre-aging treatment to form a pre-aged rolled plate; the pre-aging treatment temperature is 150-170 ℃, the time is 10-15 min, and the cooling mode is air cooling to room temperature;
H. standing at room temperature: and (4) placing the pre-aged rolled plate at room temperature for more than 4 weeks to obtain the aluminum alloy sheet for the automobile body.
And C, preparing the aluminum alloy ingot in the step A by adopting semi-continuous casting.
Before heating, the aluminum alloy cast ingot is subjected to head cutting and face milling treatment, the hot rolling mode is combination of transverse rolling and longitudinal rolling, and the hot rolling process is firstly carried out for 6-8 times along the width direction of the cast ingot and then is carried out for 10-15 times along the length direction of the flat ingot, so that a hot rolled plate is obtained.
The thickness of the aluminum alloy cast ingot is 190mm, the thickness of the hot rolled plate is 4-6 mm, and the thickness of the cold rolled plate is 0.9-1.2 mm.
The invention saves the homogenization treatment process on the basis of the traditional processing method and directly carries out hot rolling; in order to promote the dissolution of soluble alloy phase, the spheroidization of the particles of the excessive fragmentation crystal phase and the smoothness of the boundary, so as to improve the deep drawing performance and the bake hardenability of the alloy plate, a process method of further increasing the intermediate annealing temperature and properly prolonging the intermediate annealing heat preservation time on the basis of the conventional intermediate annealing treatment (420-440 ℃ for 1-2 hours) is adopted; the method can obviously shorten the production flow of the aluminum alloy automobile body plate, save energy, greatly reduce the production cost and simultaneously improve the stamping formability and the baking hardenability of the alloy plate.
Compared with the prior art, the invention has the advantages that: the plate is prepared by adopting non-homogenization treatment, so that the energy is saved, the efficiency is improved, and the production cost is reduced; the method can be implemented on the existing aluminum alloy production line, the existing tool is not required to be changed, the equipment and process investment is not required to be increased, and the operation is simple, convenient and feasible; the intermediate annealing temperature is increased, the annealing heat preservation time is properly prolonged, the soluble crystal phase is dissolved, and the particle boundary of the excessive crystal phase is smooth and spheroidized, so that the stamping formability and the baking finish hardenability of the aluminum alloy sheet are finally improved at the same time. The method realizes that the deep drawing performance and the baking hardening performance of the plate are improved while the cost of the aluminum alloy automobile body plate is reduced, thereby bringing considerable social and economic benefits.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. The aluminum alloy sheet for the automobile body is characterized by comprising the following chemical components in percentage by weight: 1.4-1.5% of Si, 0.1-0.4% of Fe, 0-0.2% of Cu, 0.03-0.17% of Mn, 0.63-0.68% of Mg, 0.1-0.15% of Cr, 0.01-0.02% of Ti, 0-0.10% of Zn and the balance of Al.
2. A method for producing an aluminum alloy sheet for automobile bodies as recited in claim 1, comprising the steps of:
A. preparing an ingot: preparing an aluminum alloy ingot;
B. hot rolling: heating an aluminum alloy ingot to 510-530 ℃, preserving heat for 4-7 h, and then carrying out hot rolling to obtain a hot rolled plate with the thickness of 4-6 mm;
C. intermediate annealing: keeping the temperature of the hot rolled plate at 540-550 ℃ for 4-7 h, and then cooling the hot rolled plate to room temperature to obtain a furnace-cooled rolled plate;
D. cold rolling: cold rolling the annealed rolled sheet to obtain a cold-rolled sheet with the thickness of 0.9-1.2 mm;
E. solution treatment: carrying out solution treatment on the cold-rolled sheet to form a rolled sheet after the solution treatment; the temperature of the solution treatment is 550-570 ℃, the time is 8-10 min, and the cooling mode is water quenching to room temperature;
F. standing at room temperature: standing the rolled plate after the solution treatment at room temperature for 30-50 min;
G. pre-aging treatment: placing the rolled plate at room temperature, and performing pre-aging treatment to form a pre-aged rolled plate; the pre-aging treatment temperature is 150-170 ℃, the time is 10-15 min, and the cooling mode is air cooling to room temperature;
H. standing at room temperature: and (4) placing the pre-aged rolled plate at room temperature for more than 4 weeks to obtain the aluminum alloy sheet for the automobile body.
3. The method for producing aluminum alloy sheet for automobile bodies as recited in claim 2, wherein the aluminum alloy ingot in the step a is produced by semi-continuous casting.
4. The method for producing the aluminum alloy sheet for the automobile body as claimed in claim 2, wherein the aluminum alloy ingot is subjected to head and face cutting before heating, the hot rolling is performed by combining transverse rolling and longitudinal rolling, and the hot rolling is performed for 6-8 times along the width direction of the ingot and then for 10-15 times along the length direction of the slab to obtain a hot rolled plate.
5. The method for producing an aluminum alloy sheet for automobile bodies as recited in claim 2, wherein the aluminum alloy ingot has a thickness of 190mm, the hot-rolled sheet has a thickness of 4 to 6mm, and the cold-rolled sheet has a thickness of 0.9 to 1.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011602402.0A CN112746202A (en) | 2020-12-29 | 2020-12-29 | Aluminum alloy sheet for automobile body and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011602402.0A CN112746202A (en) | 2020-12-29 | 2020-12-29 | Aluminum alloy sheet for automobile body and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112746202A true CN112746202A (en) | 2021-05-04 |
Family
ID=75647076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011602402.0A Pending CN112746202A (en) | 2020-12-29 | 2020-12-29 | Aluminum alloy sheet for automobile body and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112746202A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857871A (en) * | 2021-09-24 | 2021-12-31 | 广西柳州银海铝业股份有限公司 | Production method for eliminating ingot casting cracks of 4XXX aluminum alloy wide hot rolled plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880805A (en) * | 2010-07-30 | 2010-11-10 | 浙江巨科铝业有限公司 | Al-Mg-Si aluminum alloy for automobile body panel and method for producing same |
| CN106756285A (en) * | 2016-11-16 | 2017-05-31 | 东北大学 | A kind of preparation method of 6022 aluminum alloy plate materials |
| CN108359920A (en) * | 2018-01-25 | 2018-08-03 | 北京科技大学 | A kind of short route prepares the deformation heat treatment method of the anti-corrosion Al-Mg-Zn aluminium alloys of high-strength height |
| CN108385043A (en) * | 2018-03-06 | 2018-08-10 | 东北大学 | A kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car |
-
2020
- 2020-12-29 CN CN202011602402.0A patent/CN112746202A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880805A (en) * | 2010-07-30 | 2010-11-10 | 浙江巨科铝业有限公司 | Al-Mg-Si aluminum alloy for automobile body panel and method for producing same |
| CN106756285A (en) * | 2016-11-16 | 2017-05-31 | 东北大学 | A kind of preparation method of 6022 aluminum alloy plate materials |
| CN108359920A (en) * | 2018-01-25 | 2018-08-03 | 北京科技大学 | A kind of short route prepares the deformation heat treatment method of the anti-corrosion Al-Mg-Zn aluminium alloys of high-strength height |
| CN108385043A (en) * | 2018-03-06 | 2018-08-10 | 东北大学 | A kind of preparation method of 6016 aluminum alloy plate materials of body of a motor car |
Non-Patent Citations (1)
| Title |
|---|
| 李元元: "《新型材料科学与技术 金属材料卷》", 30 September 2012, 华南理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857871A (en) * | 2021-09-24 | 2021-12-31 | 广西柳州银海铝业股份有限公司 | Production method for eliminating ingot casting cracks of 4XXX aluminum alloy wide hot rolled plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111549266B (en) | Tissue regulation and control method for improving forming performance of aluminum alloy plate of vehicle body structure | |
| CN108823472B (en) | High-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy and heat treatment method thereof | |
| CN106119615B (en) | A kind of new energy resource power battery shell aluminium alloy strips and preparation method thereof | |
| CN107805746B (en) | A kind of 5005H34 aluminum alloy plate materials and its production method | |
| CN103014454B (en) | Production method of 5052-H34 aluminum alloy plate strip | |
| CN105063430A (en) | 3003-H16 aluminum alloy plate strip and production method thereof | |
| CN103014453B (en) | Production method of 5754-H24 aluminum alloy plate strip | |
| CN110184515B (en) | Preparation process of ultra-wide aluminum alloy plate for rocket fuel tank | |
| CN106756284B (en) | A kind of preparation method of 6111 aluminum alloy plate materials | |
| CN104451296A (en) | Method for manufacturing 2-series aluminum alloy | |
| WO2020048539A1 (en) | Method for improving strength of aq80m magnesium alloy and prolonging strain fatigue life thereof | |
| CN106756286A (en) | A kind of preparation method of 6181 aluminum alloy plate materials | |
| CN115261688B (en) | 7-series aluminum alloy material for thermoforming and manufacturing method thereof | |
| CN112375943A (en) | Preparation process of 6111 aluminum alloy automobile plate with high formability | |
| CN109666822A (en) | It is a kind of for producing the preparation method of 3003-H14 aluminum alloy battery shell material | |
| CN103255323B (en) | Al-Mg-Zn-Cu alloy and preparation method thereof | |
| CN104561681A (en) | 6016 aluminium alloy sheet for automotive body and production method of 6016 aluminium alloy sheet | |
| CN106367646A (en) | High-strength aluminum alloy for tank hub and manufacturing method of high-strength aluminum alloy | |
| CN102286680A (en) | Rare earth aluminum alloy used for heat exchanger fin and preparation method thereof | |
| CN108251712A (en) | A kind of preparation method of 6111 aluminum alloy plate materials of body of a motor car | |
| CN113308653B (en) | Aluminum lithium alloy heat treatment preparation method based on spray forming | |
| CN107557625B (en) | A kind of new-energy automobile high tenacity Aluminum Plate and Strip and its production method | |
| CN112746202A (en) | Aluminum alloy sheet for automobile body and production method thereof | |
| CN106521377B (en) | A kind of preparation method of 6009 aluminum alloy plate materials | |
| CN109097645A (en) | A kind of power battery for hybrid electric vehicle group pallet aluminium alloy strips and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210504 |
|
| RJ01 | Rejection of invention patent application after publication |