CN111996348A - Special heat treatment production and processing method for automobile plate - Google Patents
Special heat treatment production and processing method for automobile plate Download PDFInfo
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- CN111996348A CN111996348A CN202010920494.0A CN202010920494A CN111996348A CN 111996348 A CN111996348 A CN 111996348A CN 202010920494 A CN202010920494 A CN 202010920494A CN 111996348 A CN111996348 A CN 111996348A
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- annealing
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- heat treatment
- processing method
- automobile plate
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0268—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment between cold rolling steps
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a special heat treatment production and processing method for an automobile plate, and mainly relates to the technical field of automobile plate processing. A special heat treatment production processing method for an automobile plate comprises the following steps: the method comprises the steps of casting, hot rolling, primary annealing, cold rolling, secondary annealing, cold rolling, continuous annealing line solution treatment and finished product forming, wherein the primary annealing and the secondary annealing are continuous annealing line intermediate annealing. The invention has the beneficial effects that: according to the invention, by adopting two times of intermediate annealing, and adopting continuous annealing line intermediate annealing, the temperature can be raised to the target temperature in a short time, the processing time is shortened, the production efficiency is improved, and simultaneously a continuous annealing line structure which cannot be reached by the traditional box-type furnace intermediate annealing can be obtained, so that the plate has more uniform grain structure, more stable performance and better product quality, can further meet the requirements of customers, and brings better economic benefits to manufacturers.
Description
Technical Field
The invention mainly relates to the technical field of automobile plate processing, in particular to a special heat treatment production processing method for an automobile plate.
Background
The domestic automobile plate business is just started, is in the stage of market research and development and small-batch application, has a mature technical scheme abroad, and has high requirements on material performance, edge covering, bending, surface and material formability during the use process of the automobile plate.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a special heat treatment production processing method for an automobile plate, and the method adopts twice intermediate annealing, and is continuous annealing line intermediate annealing, so that the temperature can be raised to a target temperature in a short time, the processing time is shortened, the production efficiency is improved, and simultaneously a continuous annealing line structure which cannot be reached by the traditional box-type furnace intermediate annealing can be obtained, so that the plate has more uniform crystal grain structure, more stable performance and better product quality, can further meet the requirements of customers, and brings better economic benefits to manufacturers.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a special heat treatment production processing method for an automobile plate comprises the following steps: the method comprises the steps of casting, hot rolling, primary annealing, cold rolling, secondary annealing, cold rolling, continuous annealing line solution treatment and finished product forming, wherein the primary annealing and the secondary annealing are continuous annealing line intermediate annealing.
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: and (3) casting the large flat ingot, wherein the qualified aluminum liquid is cast according to a specified process, the casting temperature is 660 and 720 ℃, and the surface of the cast large flat ingot is milled.
And 4, step 4: homogenizing the large flat ingot at the temperature of 520 ℃ and 600 ℃ for 3-20 h.
Further, when casting in the step 3, the crystallizer and the dummy bar head are preheated to 200-300 ℃.
Further, the large flat ingot in the step 3 is milled in a four-face milling mode or an eight-face milling mode, wherein the large face milling amount is 10-25mm, and the small face milling amount is 3-15 mm.
Further, the final temperature of the hot rolling is 280-480 ℃, and the thickness of the hot rolled blank is 2-10 mm.
Further, the primary annealing temperature is 300-.
Further, the secondary annealing temperature is 300-.
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:
according to the invention, by adopting two times of intermediate annealing, and adopting continuous annealing line intermediate annealing, the temperature can be raised to the target temperature in a short time, the processing time is shortened, the production efficiency is improved, and simultaneously a continuous annealing line structure which cannot be reached by the traditional box-type furnace intermediate annealing can be obtained, so that the plate has more uniform grain structure, more stable performance and better product quality, can further meet the requirements of customers, and brings better economic benefits to manufacturers.
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.
The invention relates to a special heat treatment production processing method of an automobile plate, which comprises the following steps: the method comprises the steps of casting, hot rolling, primary annealing, cold rolling, secondary annealing, cold rolling, continuous annealing line solution treatment and finished product forming, wherein the primary annealing and the secondary annealing are continuous annealing line intermediate annealing.
Specifically, 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: and (3) casting the large flat ingot, wherein the qualified aluminum liquid is cast according to a specified process, the casting temperature is 660 and 720 ℃, and the surface of the cast large flat ingot is milled.
And 4, step 4: homogenizing the large flat ingot at the temperature of 520 ℃ and 600 ℃ for 3-20 h.
Specifically, when casting in the step 3, the crystallizer and the dummy bar head are preheated to 200-300 ℃.
Specifically, the large slab ingot in the step 3 is milled in a four-face milling mode or an eight-face milling mode, wherein the large face milling amount is 10-25mm, and the small face milling amount is 3-15 mm.
Specifically, the final hot rolling temperature is 280-480 ℃, and the thickness of the hot rolled blank is 2-10 mm.
Specifically, the primary annealing temperature is 300-500 ℃, the heat preservation time is 20-480s, the thickness of the hot rolled blank is more than 5mm and needs to be cold-rolled to be less than 5mm, and the intermediate annealing thickness obtained by cold rolling is 2-5 mm.
Specifically, the secondary annealing temperature is 300-.
Specifically, the solution treatment temperature of the continuous annealing line of the cold-rolled finished product is 500-580 ℃.
Example (b):
firstly, a blank is sent into a preheating furnace for preheating, the preheated blank is sent into a heating furnace for heating, then molten metal is refined, casting is carried out after refining, large flat ingots are obtained through natural cooling, the surfaces of the large flat ingots are milled, and then hot rolling, primary annealing, cold rolling, secondary annealing, cold rolling and continuous annealing line solution treatment are carried out on the large flat ingots to obtain finished products.
According to the invention, by adopting two times of intermediate annealing, and adopting continuous annealing line intermediate annealing, the temperature can be raised to the target temperature in a short time, the processing time is shortened, the production efficiency is improved, and simultaneously a continuous annealing line structure which cannot be reached by the traditional box-type furnace intermediate annealing can be obtained, so that the plate has more uniform grain structure, more stable performance and better product quality, can further meet the requirements of customers, and brings better economic benefits to manufacturers.
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 (8)
1. A special heat treatment production processing method of an automobile plate is characterized by comprising the following steps: the method comprises the following steps: the method comprises the steps of casting, hot rolling, primary annealing, cold rolling, secondary annealing, cold rolling, continuous annealing line solution treatment and finished product forming, wherein the primary annealing and the secondary annealing are continuous annealing line intermediate annealing.
2. The special heat treatment production and processing method of the automobile plate as claimed in claim 1, wherein the method comprises the following steps: 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: and (3) casting the large flat ingot, wherein the qualified aluminum liquid is cast according to a specified process, the casting temperature is 660 and 720 ℃, and the surface of the cast large flat ingot is milled.
And 4, step 4: homogenizing the large flat ingot at the temperature of 520 ℃ and 600 ℃ for 3-20 h.
3. The special heat treatment production and processing method of the automobile plate as claimed in claim 2, wherein the method comprises the following steps: and (3) preheating the crystallizer and the dummy bar head to 200-300 ℃ during casting in the step 3.
4. The special heat treatment production and processing method of the automobile plate as claimed in claim 2, wherein the method comprises the following steps: and 3, the large flat ingot surface milling mode in the step 3 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 special heat treatment production and processing method of the automobile plate as claimed in claim 1, wherein the method comprises the following steps: the final temperature of the hot rolling is 280-480 ℃, and the thickness of the hot rolled blank is 2-10 mm.
6. The special heat treatment production and processing method of the automobile plate as claimed in claim 1, wherein the method comprises the following steps: the primary annealing temperature is 300-500 ℃, the heat preservation time is 20-480s, the thickness of the hot rolled blank is more than 5mm and needs to be cold rolled to be less than 5mm, and the intermediate annealing thickness obtained by cold rolling is 2-5 mm.
7. The special heat treatment production and processing method of the automobile plate as claimed in claim 1, wherein the method comprises the following steps: the secondary annealing temperature is 300-500 ℃, the heat preservation time is 20-480s, and the thickness of the hot rolled blank is 1.5-4 mm.
8. The special heat treatment production and processing method of the automobile plate as claimed in claim 1, wherein the method comprises the following steps: 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 |
|---|---|---|---|
| CN202010920494.0A CN111996348A (en) | 2020-09-04 | 2020-09-04 | Special heat treatment production and processing method for automobile plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010920494.0A CN111996348A (en) | 2020-09-04 | 2020-09-04 | Special heat treatment production and processing method for automobile plate |
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| CN111996348A true CN111996348A (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010920494.0A Pending CN111996348A (en) | 2020-09-04 | 2020-09-04 | Special heat treatment production and processing method for automobile plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113070361A (en) * | 2021-02-24 | 2021-07-06 | 山东南山铝业股份有限公司 | Hot-rolling special rolling production method for 6-series automobile plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1914340A (en) * | 2004-02-03 | 2007-02-14 | 日本轻金属株式会社 | High strength aluminum alloy fin material for heat exchanger and method for production thereof |
| CN104975207A (en) * | 2015-03-13 | 2015-10-14 | 宝山钢铁股份有限公司 | Al-Mg-Si aluminum alloy material, aluminum alloy plate, and preparation methods of Al-Mg-Si aluminum alloy material and aluminum alloy plate |
| CN105543741A (en) * | 2015-12-17 | 2016-05-04 | 西南铝业（集团）有限责任公司 | Intermediate annealing process of aluminum alloy and aluminum alloy for automobile covering part |
| CN107267816A (en) * | 2016-03-30 | 2017-10-20 | 株式会社神户制钢所 | High formability aluminium alloy plate |
| CN111440970A (en) * | 2020-04-21 | 2020-07-24 | 天津忠旺铝业有限公司 | 6-series aluminum alloy plate for automobile body outer plate and preparation method thereof |
| CN111575548A (en) * | 2020-04-21 | 2020-08-25 | 天津忠旺铝业有限公司 | 6-series aluminum alloy automobile outer plate with excellent comprehensive performance and preparation method thereof |
-
2020
- 2020-09-04 CN CN202010920494.0A patent/CN111996348A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1914340A (en) * | 2004-02-03 | 2007-02-14 | 日本轻金属株式会社 | High strength aluminum alloy fin material for heat exchanger and method for production thereof |
| CN104975207A (en) * | 2015-03-13 | 2015-10-14 | 宝山钢铁股份有限公司 | Al-Mg-Si aluminum alloy material, aluminum alloy plate, and preparation methods of Al-Mg-Si aluminum alloy material and aluminum alloy plate |
| CN105543741A (en) * | 2015-12-17 | 2016-05-04 | 西南铝业（集团）有限责任公司 | Intermediate annealing process of aluminum alloy and aluminum alloy for automobile covering part |
| CN107267816A (en) * | 2016-03-30 | 2017-10-20 | 株式会社神户制钢所 | High formability aluminium alloy plate |
| CN111440970A (en) * | 2020-04-21 | 2020-07-24 | 天津忠旺铝业有限公司 | 6-series aluminum alloy plate for automobile body outer plate and preparation method thereof |
| CN111575548A (en) * | 2020-04-21 | 2020-08-25 | 天津忠旺铝业有限公司 | 6-series aluminum alloy automobile outer plate with excellent comprehensive performance and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113070361A (en) * | 2021-02-24 | 2021-07-06 | 山东南山铝业股份有限公司 | Hot-rolling special rolling production method for 6-series automobile plate |
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Application publication date: 20201127 |