CN107618231B - Preparation method of aluminum alloy plate for vehicle body - Google Patents
Preparation method of aluminum alloy plate for vehicle body Download PDFInfo
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- CN107618231B CN107618231B CN201710878187.9A CN201710878187A CN107618231B CN 107618231 B CN107618231 B CN 107618231B CN 201710878187 A CN201710878187 A CN 201710878187A CN 107618231 B CN107618231 B CN 107618231B
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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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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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
- 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
-
- 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
- C22F1/047—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 magnesium as the next major constituent
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Body Structure For Vehicles (AREA)
- Laminated Bodies (AREA)
- Metal Rolling (AREA)
Abstract
The invention belongs to an aluminum alloy plate for a vehicle body, which is prepared from an aluminum alloy plate A and an aluminum alloy plate B by the following steps: 1) hot rolling the aluminum alloy plate A and the aluminum alloy plate B to form a double-layer composite structure; 2) carrying out solid solution treatment on the plate treated in the step 1), wherein the temperature of the solid solution treatment is 520-560 ℃, and the heat preservation time is 20-25 min; 3) and (3) carrying out artificial aging treatment on the plate treated in the step 2), wherein the temperature of the artificial aging treatment is 70-100 ℃, and the time is 2-10 h.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy materials, and particularly relates to a preparation method of an aluminum alloy plate for a vehicle body.
Background
The aluminum alloy has high strength, light weight and good electrical conductivity, and is widely applied to the technical fields of aerospace, automobile manufacturing and the like, so that the aluminum alloy becomes the most ideal material for automobile light weight. Due to the formability of aluminum alloys in the outer body panels of vehicles, dent resistance, bake hardenability (after painting) and the high mechanical strength resulting therefrom, it is possible to manufacture sheets having thinner gauge and lighter weight, while having a class a surface finish. The improvement of the Mg content in the aluminum alloy can greatly indicate the strength, the formability and the corrosion resistance of the alloy, but has the defects of delayed yield and a Ledes line and easy occurrence of an orange peel effect. The existing aluminum alloy which can simultaneously meet the performance requirements of the curling performance and the surface painting line brushing performance of the aluminum alloy plate has complex processing technology, strict requirements on raw materials and higher cost.
Disclosure of Invention
The invention aims to provide an aluminum alloy plate for a vehicle body, which has excellent curling performance, good surface quality, stable mechanical property stability and excellent baking varnish hardening performance.
In order to achieve the purpose, the invention adopts the technical scheme that the aluminum alloy plate for the vehicle body is made of an aluminum alloy plate A and an aluminum alloy plate B through the following steps:
1) hot rolling the aluminum alloy plate A and the aluminum alloy plate B to form a double-layer composite structure;
2) carrying out solid solution treatment on the plate treated in the step 1), wherein the temperature of the solid solution treatment is 520-560 ℃, and the heat preservation time is 20-25 min;
3) and (3) carrying out artificial aging treatment on the plate treated in the step 2), wherein the temperature of the artificial aging treatment is 70-100 ℃, and the time is 2-10 h.
The aluminum alloy plate A comprises the following chemical components in percentage by weight: 0.5-1.0% of Si, 0.55-1.0% of Cu, 0.2-0.5% of Zns, 2.0-3.2% of Mg, 0.05-0.1% of Ce, 0.15-0.2% of Sc, less than or equal to 1% of Fe, and the balance of Al.
The aluminum alloy plate B comprises the following chemical components in percentage by weight: 2.2-3.5% of Si, 0.55-1.5% of Cu, 0.2-0.33% of Zns, 0.4-1% of Mg, 0.2-0.25% of Ce, less than or equal to 1% of Fe and the balance of Al.
The thickness of the aluminum alloy plate for the automobile body is 0.5-5 mm.
The thickness ratio of the aluminum alloy plate A to the aluminum alloy plate B is 0.66: 1-1.5: 1.
The preparation method of the aluminum alloy plate A comprises the following steps:
a. weighing industrial pure aluminum and various intermediate alloys according to the proportion;
b. melting the selected raw materials, refining the melt, and casting the melt into an ingot;
c. carrying out homogenization treatment on the cast ingot after head cutting and face milling, wherein the homogenization treatment temperature is 400-450 ℃, and the homogenization treatment time is 2-10 h;
d. c, hot rolling the cast ingots processed in the step c into plates, wherein the initial rolling temperature is 430-480 ℃, and the final rolling temperature is 280-300 ℃;
e. and d, performing cold rolling, intermediate annealing and cold rolling again on the hot rolled plate obtained in the step d to obtain a finished product with the final thickness.
The casting temperature in the step b is 670-.
The preparation method of the aluminum alloy plate B comprises the following steps:
(1) weighing industrial pure aluminum and various intermediate alloys according to the proportion;
(2) melting the selected raw materials, refining the melt, and casting the melt into an ingot;
(3) carrying out homogenization treatment on the cast ingot after head cutting and face milling, wherein the homogenization treatment temperature is 420-460 ℃, and the homogenization treatment time is 2-8 h;
(4) hot rolling the cast ingots processed in the step (3) into plates, wherein the initial rolling temperature is 480 ℃ and the final rolling temperature is 300 ℃ and 450 ℃;
(5) and (4) carrying out cold rolling, intermediate annealing and cold rolling again on the hot rolled plate obtained in the step (4) to obtain a finished product with a final thickness.
The casting temperature in the step (2) is 685-710 ℃.
The invention has the following beneficial effects: the A layer of the aluminum alloy plate for the vehicle body, which is obtained by the invention, has excellent formability and hardness and high strength; the B layer has better shaping and higher baking varnish hardening response, the aluminum alloy plate after the two layers are compounded has high strength and good formability, and the B layer side can obtain strength improvement in the automobile coating and baking treatment process and can be widely applied to the field of manufacturing automobile bodies and panels.
Detailed Description
The invention will be further illustrated with reference to specific examples, without however restricting the scope of the invention thereto.
Example 1
An aluminum alloy sheet for a vehicle body, which is produced from an aluminum alloy sheet A and an aluminum alloy sheet B by the steps of:
1) hot rolling the aluminum alloy plate A and the aluminum alloy plate B to form a double-layer composite structure;
2) carrying out solid solution treatment on the plate treated in the step 1), wherein the solid solution treatment temperature is 560 ℃, and the heat preservation time is 25 min;
3) and (3) carrying out artificial aging treatment on the plate treated in the step 2), wherein the temperature of the artificial aging treatment is 90 ℃, and the time is 8 h.
The aluminum alloy plate A comprises the following chemical components in percentage by weight: 0.5% of Si, 0.95% of Cu, 0.4% of Zn, 3.0% of Mg3, 0.05% of Ce, 0.15% of Sc, 0.9% of Fe and the balance of Al.
The aluminum alloy plate B comprises the following chemical components in percentage by weight: 2.2% of Si, 0.85% of Cu, 0.23% of Zn, 0.4% of Mg0.2% of Ce, 0.95% of Fe and the balance of Al.
The thickness ratio of the aluminum alloy plate A to the aluminum alloy plate B is 1: 1.
The preparation method of the aluminum alloy plate A comprises the following steps:
a. weighing industrial pure aluminum and various intermediate alloys according to the proportion;
b. melting the selected raw materials, refining the melt, and then casting into an ingot with the casting temperature of 670 ℃;
c. carrying out homogenization treatment on the cast ingot after head cutting and face milling, wherein the homogenization treatment temperature is 450 ℃, and the homogenization treatment time is 8 h;
d. c, hot rolling the cast ingot processed in the step c into a plate, wherein the initial rolling temperature is 470 ℃, and the final rolling temperature is 290 ℃;
e. and d, performing cold rolling, intermediate annealing and cold rolling again on the hot rolled plate obtained in the step d to obtain a finished product with the final thickness.
The preparation method of the aluminum alloy plate B comprises the following steps:
(1) weighing industrial pure aluminum and various intermediate alloys according to the proportion;
(2) melting the selected raw materials, refining the melt, and casting the melt into an ingot with the casting temperature of 685 ℃;
(3) carrying out homogenization treatment on the cast ingot after head cutting and surface milling, wherein the homogenization treatment temperature is 460 ℃, and the homogenization treatment time is 8 h;
(4) hot rolling the cast ingot treated in the step (3) into a plate, wherein the initial rolling temperature is 480 ℃, and the final rolling temperature is 300 ℃;
(5) and (4) carrying out cold rolling, intermediate annealing and cold rolling again on the hot rolled plate obtained in the step (4) to obtain a finished product with a final thickness.
The thickness of the aluminum alloy plate for the vehicle body is 5 mm.
Performance testing
The results of the performance test of the two-layer composite aluminum alloy for automobile bodies prepared in example 1 are as follows:
note: evaluation of the paint line strength (grade 1: no white streaks on the surface; grade 2: discontinuous white streaks on the surface; grade 3: continuous white streaks on the surface). The crimp rating was evaluated (level 1: smooth surface, no microcracks and continuous necking; level 2: slightly rough surface, no microcracks and continuous necking; level 3: microcracked surface or continuous necking; level 4: apparent cracks on surface).
Claims (3)
1. The preparation method of the aluminum alloy plate for the vehicle body is characterized in that the aluminum alloy plate for the vehicle body is prepared from an aluminum alloy plate A and an aluminum alloy plate B through the following steps:
1) carrying out hot rolling on an aluminum alloy plate A and an aluminum alloy plate B to form a double-layer composite structure, wherein the aluminum alloy plate A comprises the following chemical components in percentage by weight: 0.5-1.0% of Si, 0.55-1.0% of Cu, 0.2-0.5% of Zn, 2.0-3.2% of Mg, 0.05-0.1% of Ce0.15-0.2% of Sc, less than or equal to 1% of Fe and the balance of Al; the aluminum alloy plate B comprises the following chemical components in percentage by weight: 2.2-3.5% of Si, 0.55-1.5% of Cu, 0.2-0.33% of Zn, 0.4-1% of Mg, 0.2-0.25% of Ce, less than or equal to 1% of Fe and the balance of Al;
2) carrying out solid solution treatment on the plate treated in the step 1), wherein the temperature of the solid solution treatment is 520-560 ℃, and the heat preservation time is 20-25 min;
3) carrying out artificial aging treatment on the plate treated in the step 2), wherein the temperature of the artificial aging treatment is 70-100 ℃, and the time is 2-10 h;
the preparation method of the aluminum alloy plate A comprises the following steps:
a. weighing industrial pure aluminum and various intermediate alloys according to the proportion;
b. melting the selected raw materials, refining the melt, and casting the melt into an ingot at 670-685 ℃;
c. carrying out homogenization treatment on the cast ingot after head cutting and face milling, wherein the homogenization treatment temperature is 400-450 ℃, and the homogenization treatment time is 2-10 h;
d. c, hot rolling the cast ingots processed in the step c into plates, wherein the initial rolling temperature is 430-480 ℃, and the final rolling temperature is 280-300 ℃;
e. d, performing cold rolling, intermediate annealing and cold rolling again on the hot rolled plate obtained in the step d to obtain a finished product with the final thickness;
the preparation method of the aluminum alloy plate B comprises the following steps:
(1) weighing industrial pure aluminum and various intermediate alloys according to the proportion;
(2) melting the selected raw materials, refining the melt, and casting the melt into an ingot at the casting temperature of 685-710 ℃;
(3) carrying out homogenization treatment on the cast ingot after head cutting and face milling, wherein the homogenization treatment temperature is 420-460 ℃, and the homogenization treatment time is 2-8 h;
(4) hot rolling the cast ingots processed in the step (3) into plates, wherein the initial rolling temperature is 480 ℃ and the final rolling temperature is 300 ℃ and 450 ℃;
(5) and (4) carrying out cold rolling, intermediate annealing and cold rolling again on the hot rolled plate obtained in the step (4) to obtain a finished product with a final thickness.
2. The method of claim 1, wherein: the thickness of the aluminum alloy plate for the automobile body is 0.5-5 mm.
3. The method of claim 1, wherein: the thickness ratio of the aluminum alloy plate A to the aluminum alloy plate B is 0.66: 1-1.5: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710878187.9A CN107618231B (en) | 2016-08-02 | 2016-08-02 | Preparation method of aluminum alloy plate for vehicle body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710878187.9A CN107618231B (en) | 2016-08-02 | 2016-08-02 | Preparation method of aluminum alloy plate for vehicle body |
| CN201610624235.7A CN106148772B (en) | 2016-08-02 | 2016-08-02 | Aluminium alloys for auto body plate |
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| CN201610624235.7A Division CN106148772B (en) | 2016-08-02 | 2016-08-02 | Aluminium alloys for auto body plate |
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| CN107618231A CN107618231A (en) | 2018-01-23 |
| CN107618231B true CN107618231B (en) | 2020-03-10 |
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| CN201610624235.7A Active CN106148772B (en) | 2016-08-02 | 2016-08-02 | Aluminium alloys for auto body plate |
| CN201710878187.9A Active CN107618231B (en) | 2016-08-02 | 2016-08-02 | Preparation method of aluminum alloy plate for vehicle body |
| CN201710878337.6A Active CN107587011B (en) | 2016-08-02 | 2016-08-02 | A kind of aluminium alloys for auto body plate and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106148772B (en) * | 2016-08-02 | 2017-12-26 | 福建奋安铝业有限公司 | Aluminium alloys for auto body plate |
| CN106381424A (en) * | 2016-11-24 | 2017-02-08 | 苏州华意铭铄激光科技有限公司 | High-performance composite aluminum-based metal product |
| CN106739268A (en) * | 2016-11-24 | 2017-05-31 | 苏州华意铭铄激光科技有限公司 | A kind of durable composite metal product of superhigh intensity |
| CN106739260A (en) * | 2016-11-24 | 2017-05-31 | 苏州华意铭铄激光科技有限公司 | A kind of forging type composite metal product for being easy to process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011252212A (en) * | 2010-06-03 | 2011-12-15 | Sumitomo Light Metal Ind Ltd | Method for forming processing of 6000 series aluminum alloy material, and forming processed product |
| CN104703792A (en) * | 2012-09-12 | 2015-06-10 | 阿莱利斯铝业迪弗尔私人有限公司 | Production of formed automotive structural parts from aa7xxx-series aluminium alloys |
| CN106148772A (en) * | 2016-08-02 | 2016-11-23 | 王映朴 | Aluminium alloys for auto body plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100279143A1 (en) * | 2009-04-30 | 2010-11-04 | Kamat Rajeev G | Multi-alloy composite sheet for automotive panels |
| FR2979576B1 (en) * | 2011-09-02 | 2018-07-20 | Constellium France | PLATED PLATE FOR AUTOMOTIVE BODYWORK |
| CN104451208B (en) * | 2014-11-28 | 2017-06-20 | 苏州有色金属研究院有限公司 | The body of a motor car manufacture method of 6XXX line aluminium alloy sheet materials |
| CN105441740A (en) * | 2016-01-12 | 2016-03-30 | 苏州有色金属研究院有限公司 | Autobody 6XXX series aluminium alloy plate with high edge-curling property and manufacturing method thereof |
| CN106216394B (en) * | 2016-08-02 | 2017-11-07 | 黄河科技学院 | A kind of body of a motor car two-layer compound aluminium alloy |
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- 2016-08-02 CN CN201610624235.7A patent/CN106148772B/en active Active
- 2016-08-02 CN CN201710878187.9A patent/CN107618231B/en active Active
- 2016-08-02 CN CN201710878337.6A patent/CN107587011B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011252212A (en) * | 2010-06-03 | 2011-12-15 | Sumitomo Light Metal Ind Ltd | Method for forming processing of 6000 series aluminum alloy material, and forming processed product |
| CN104703792A (en) * | 2012-09-12 | 2015-06-10 | 阿莱利斯铝业迪弗尔私人有限公司 | Production of formed automotive structural parts from aa7xxx-series aluminium alloys |
| CN106148772A (en) * | 2016-08-02 | 2016-11-23 | 王映朴 | Aluminium alloys for auto body plate |
| CN107587011A (en) * | 2016-08-02 | 2018-01-16 | 王映朴 | Aluminium alloys for auto body plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107587011A (en) | 2018-01-16 |
| CN107618231A (en) | 2018-01-23 |
| CN106148772A (en) | 2016-11-23 |
| CN106148772B (en) | 2017-12-26 |
| CN107587011B (en) | 2019-03-15 |
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Address after: 264300, Weihai, Shandong province Rongcheng City Road Patentee after: Rongcheng Mingjun outdoor leisure products Co.,Ltd. Address before: 264300, Weihai, Shandong province Rongcheng City Road Patentee before: RONGCHENG MINGJUN OUTDOOR LEISURE PRODUCTS Co.,Ltd. |
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Denomination of invention: A preparation method of aluminum alloy plate for car body Effective date of registration: 20221125 Granted publication date: 20200310 Pledgee: Weihai Branch of China Merchants Bank Co.,Ltd. Pledgor: Rongcheng Mingjun outdoor leisure products Co.,Ltd. Registration number: Y2022980023724 |
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