CN113070361A - Hot-rolling special rolling production method for 6-series automobile plate - Google Patents
Hot-rolling special rolling production method for 6-series automobile plate Download PDFInfo
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- CN113070361A CN113070361A CN202110205468.4A CN202110205468A CN113070361A CN 113070361 A CN113070361 A CN 113070361A CN 202110205468 A CN202110205468 A CN 202110205468A CN 113070361 A CN113070361 A CN 113070361A
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- 238000005098 hot rolling Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000005096 rolling process Methods 0.000 title claims abstract description 16
- 238000003801 milling Methods 0.000 claims abstract description 31
- 238000005266 casting Methods 0.000 claims abstract description 27
- 238000000137 annealing Methods 0.000 claims abstract description 8
- 238000005097 cold rolling Methods 0.000 claims abstract description 6
- 238000007670 refining Methods 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 230000004927 fusion Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 9
- 239000010931 gold Substances 0.000 description 9
- 229910052737 gold Inorganic materials 0.000 description 9
- 238000010587 phase diagram Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2263/00—Shape of product
- B21B2263/02—Profile, e.g. of plate, hot strip, sections
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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)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a hot rolling special rolling production method for a 6-series automobile plate, and mainly relates to the technical field of automobile plate processing. A hot rolling special rolling production method for 6-series automobile plates comprises the following steps: casting, milling the surface of a large slab ingot, homogenizing the large slab ingot, hot rolling, cold rolling, solution treatment of a continuous annealing line and obtaining a finished product. The invention has the beneficial effects that: the invention adopts high-temperature rolling, so that the structure and the crystal grains of the material are more uniform, the performance is more stable, the product quality is better, and the production efficiency and the comprehensive quality level of the product are improved.
Description
Technical Field
The invention mainly relates to the technical field of automobile plate processing, in particular to a hot rolling special rolling production method for 6-series automobile plates.
Background
The production and application of domestic aluminum automobile outer plates are still blank at present, and the outer plates used in domestic automobile host plants are all imported in different forms. The automobile is popularized and applied in various main engine plants in a light weight mode, the main engine plants have more and more requirements on automobile aluminum, and meanwhile, the requirement on the quality of an automobile outer plate is higher and higher. Especially, the aging performance, edge covering, roller flat line and surface of the material put higher requirements. The domestic automobile sheet production technology is from zero, and the technical requirements of customers cannot be met by using the conventional tank material production method. A plurality of sets of production methods belonging to own intellectual property rights need to be newly developed.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a special hot rolling production method for 6-series automobile plates.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a hot rolling special rolling production method for 6-series automobile plates comprises the following steps: casting, milling the surface of a large slab ingot, homogenizing the large slab ingot, hot rolling, cold rolling, solution treatment of a continuous annealing line and obtaining a finished product.
Further, the fusion casting comprises the following steps:
step 1: preheating the raw materials in a smelting furnace at the preheating temperature of 400-;
step 2: the melted metal liquid is transferred to a holding furnace for refining and slagging off, the refining temperature is 700-760 ℃, and the refining time is 20-90 min;
and step 3: casting a large flat ingot, namely casting qualified aluminum liquid according to a specified process, wherein the casting temperature is 660-720 ℃, and the casting speed is 40-60 mm/min.
Further, when casting in the step 3, the crystallizer and the dummy bar head are preheated to 200-300 ℃.
Furthermore, the large flat ingot surface milling mode is four-surface milling or eight-surface milling, the large surface milling amount is 10-25mm, and the small surface milling amount is 3-15 mm.
Further, in the step of homogenizing the large slab ingot, the homogenizing temperature is 500-600 ℃, and the heat preservation time is 2-20 h.
Further, the final temperature of the hot rolling is 350-450 ℃, and the thickness of the hot rolled blank is 2-10 mm.
Further, the solution treatment temperature of the continuous annealing line of the cold-rolled finished product is 500-580 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts high-temperature rolling, so that the structure and the crystal grains of the material are more uniform, the performance is more stable, the product quality is better, and the production efficiency and the comprehensive quality level of the product are improved.
Drawings
FIG. 1 is a gold phase diagram of surface grains in example 1;
FIG. 2 is a longitudinal grain gold phase diagram of example 1;
FIG. 3 is a gold phase diagram of the lateral grains in example 1;
FIG. 4 is a gold phase diagram of surface grains in example 2;
FIG. 5 is a longitudinal grain gold phase diagram of example 2;
FIG. 6 is a gold phase diagram of the lateral grains in example 2;
FIG. 7 is a gold phase diagram of surface grains in example 3;
FIG. 8 is a longitudinal grain gold phase diagram of example 3;
FIG. 9 is a gold phase diagram of the lateral grains in example 3;
Detailed Description
The present invention will be further illustrated by reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
Example 1:
step 1: casting: adding the raw materials into a smelting furnace for preheating at 400 ℃ for 40min, heating the preheated raw materials, adding a proper amount of intermediate alloy, and heating at 630 ℃ for 150 min; the melted molten metal is transferred to a holding furnace through a converter for refining and slagging off, the refining temperature is 700 ℃, and the refining time is 20 min; casting the qualified aluminum liquid according to a specified process, wherein the casting temperature is 660 ℃, and the casting speed is 40 mm/min;
step 2: milling the surface of the large flat ingot, wherein the surface milling mode is four-surface milling or eight-surface milling, the surface milling amount of the large surface is 10mm, and the surface milling amount of the small surface is 3 mm;
and step 3: homogenizing large flat ingots: the homogenization treatment temperature is 500 ℃, and the heat preservation time is 2 hours;
and 4, step 4: hot rolling: the final temperature of hot rolling is 350 ℃, the thickness of a hot rolled blank is 2mm, and then cold rolling is carried out;
and 5: continuous annealing line solution treatment: the temperature was 500 ℃.
Example 2:
step 1: casting: adding the raw materials into a smelting furnace for preheating at the temperature of 450 ℃ for 50min, heating the preheated raw materials, adding a proper amount of intermediate alloy, and heating at the temperature of 700 ℃ for 175 min; the melted molten metal is transferred to a holding furnace through a converter for refining and slagging off, the refining temperature is 730 ℃, and the refining time is 55 min; casting the qualified aluminum liquid according to a specified process, wherein the casting temperature is 690 ℃, and the casting speed is 50 mm/min;
step 2: milling the surface of the large flat ingot, wherein the surface milling mode is four-surface milling or eight-surface milling, the large surface milling amount is 18mm, and the small surface milling amount is 9 mm;
and step 3: homogenizing large flat ingots: the homogenization treatment temperature is 550 ℃, and the heat preservation time is 11 h;
and 4, step 4: hot rolling: the final temperature of hot rolling is 400 ℃, the thickness of a hot rolled blank is 6mm, and then cold rolling is carried out;
and 5: continuous annealing line solution treatment: the temperature was 540 ℃.
Example 3:
step 1: casting: adding the raw materials into a smelting furnace for preheating at 500 ℃ for 60min, heating the preheated raw materials, adding a proper amount of intermediate alloy, and heating at 775 ℃ for 200 min; the melted molten metal is transferred to a holding furnace through a converter for refining and slagging off, the refining temperature is 760 ℃, and the refining time is 90 min; casting the qualified aluminum liquid according to a specified process, wherein the casting temperature is 720 ℃, and the casting speed is 60 mm/min;
step 2: milling the surface of the large flat ingot, wherein the surface milling mode is four-surface milling or eight-surface milling, the surface milling amount of the large surface is 25mm, and the surface milling amount of the small surface is 15 mm;
and step 3: homogenizing large flat ingots: the homogenization treatment temperature is 600 ℃, and the heat preservation time is 20 hours;
and 4, step 4: hot rolling: the final temperature of hot rolling is 450 ℃, the thickness of the hot rolled blank is 10mm, and then cold rolling is carried out;
and 5: continuous annealing line solution treatment: the temperature was 580 ℃.
The invention adopts high-temperature rolling, so that the structure and the crystal grains of the material are more uniform, the performance is more stable, the product quality is better, and the production efficiency and the comprehensive quality level of the product are improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A hot rolling special rolling production method for 6 series automobile plates is characterized by comprising the following steps: the method comprises the following steps: casting, milling the surface of a large slab ingot, homogenizing the large slab ingot, hot rolling, cold rolling, solution treatment of a continuous annealing line and obtaining a finished product.
2. The hot rolling special rolling production method for the 6-series automobile plate according to claim 1, characterized by comprising the following steps of: the fusion casting comprises the following steps:
step 1: preheating the raw materials in a smelting furnace at the preheating temperature of 400-;
step 2: the melted metal liquid is transferred to a holding furnace for refining and slagging off, the refining temperature is 700-760 ℃, and the refining time is 20-90 min;
and step 3: casting a large flat ingot, namely casting qualified aluminum liquid according to a specified process, wherein the casting temperature is 660-720 ℃, and the casting speed is 40-60 mm/min.
3. The hot rolling special rolling production method for the 6-series automobile plate, according to claim 2, is characterized in that: and (3) preheating the crystallizer and the dummy bar head to 200-300 ℃ during casting in the step 3.
4. The hot rolling special rolling production method for the 6-series automobile plate according to claim 1, characterized by comprising the following steps of: the large flat ingot surface milling mode is four-surface milling or eight-surface milling, the large surface milling amount is 10-25mm, and the small surface milling amount is 3-15 mm.
5. The hot rolling special rolling production method for the 6-series automobile plate according to claim 1, characterized by comprising the following steps of: in the step of homogenizing the large slab ingot, the homogenizing temperature is 500-600 ℃, and the heat preservation time is 2-20 h.
6. The hot rolling special rolling production method for the 6-series automobile plate according to claim 1, characterized by comprising the following steps of: the final temperature of the hot rolling is 350-450 ℃, and the thickness of the hot rolled blank is 2-10 mm.
7. The hot rolling special rolling production method for the 6-series automobile plate according to claim 1, characterized by comprising the following steps of: the solution treatment temperature of the continuous annealing line of the cold-rolled finished product is 500-580 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110205468.4A CN113070361A (en) | 2021-02-24 | 2021-02-24 | Hot-rolling special rolling production method for 6-series automobile plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110205468.4A CN113070361A (en) | 2021-02-24 | 2021-02-24 | Hot-rolling special rolling production method for 6-series automobile plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125407A (en) * | 2022-08-12 | 2022-09-30 | 山东南山铝业股份有限公司 | Production method of circulating grade-maintaining 5-series food can material |
| WO2023151433A1 (en) * | 2022-02-10 | 2023-08-17 | 山东南山铝业股份有限公司 | Environmentally friendly recycling grade-maintaining production method for 6-series high-formability automobile plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111996348A (en) * | 2020-09-04 | 2020-11-27 | 山东南山铝业股份有限公司 | Special heat treatment production and processing method for automobile plate |
| CN112063817A (en) * | 2020-09-04 | 2020-12-11 | 山东南山铝业股份有限公司 | Secondary annealing production processing method for automobile plate |
| CN112195424A (en) * | 2020-10-29 | 2021-01-08 | 天津忠旺铝业有限公司 | Preparation process for improving r value and uniformity of 6016 aluminum alloy plate |
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2021
- 2021-02-24 CN CN202110205468.4A patent/CN113070361A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996348A (en) * | 2020-09-04 | 2020-11-27 | 山东南山铝业股份有限公司 | Special heat treatment production and processing method for automobile plate |
| CN112063817A (en) * | 2020-09-04 | 2020-12-11 | 山东南山铝业股份有限公司 | Secondary annealing production processing method for automobile plate |
| CN112195424A (en) * | 2020-10-29 | 2021-01-08 | 天津忠旺铝业有限公司 | Preparation process for improving r value and uniformity of 6016 aluminum alloy plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023151433A1 (en) * | 2022-02-10 | 2023-08-17 | 山东南山铝业股份有限公司 | Environmentally friendly recycling grade-maintaining production method for 6-series high-formability automobile plate |
| CN115125407A (en) * | 2022-08-12 | 2022-09-30 | 山东南山铝业股份有限公司 | Production method of circulating grade-maintaining 5-series food can material |
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