CN111330975A - Efficient rolling method of steel plate - Google Patents
Efficient rolling method of steel plate Download PDFInfo
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- CN111330975A CN111330975A CN202010309915.6A CN202010309915A CN111330975A CN 111330975 A CN111330975 A CN 111330975A CN 202010309915 A CN202010309915 A CN 202010309915A CN 111330975 A CN111330975 A CN 111330975A
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- rolling
- rolled
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- finished product
- cutting
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- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a high-efficiency rolling method of a steel plate, which is characterized in that an intermediate blank after being rolled for a plurality of times is cut and segmented rapidly on line, then a plurality of small cut intermediate blanks are rolled into finished products, and the finished products with different dimensions can be rolled by adopting different rolling processes, so that the aims of rolling multiple plates and efficiently are fulfilled. The method specifically comprises the following steps: rolling the plate blank into an intermediate blank for a plurality of times, and quickly cutting the intermediate blank into N small intermediate blanks (N is more than or equal to 2) on line; the steel is rolled into a finished product according to a required rolling process, the rolled finished product can be subjected to water cooling or air cooling on a cooling bed, and then is subjected to heat treatment according to performance requirements, the method greatly saves cogging mill time, reduces rolling cost, and can be used for on-site steel rolling production in a laboratory rolling experiment or a medium plate workshop.
Description
Technical Field
The invention relates to the field of rolling and processing of metal materials, in particular to a high-efficiency rolling method of a steel plate.
Background
In the field rolling production of steel enterprises, all steel mills cut continuous casting billets and other blanks into fixed-length blanks or multiple-length blanks, then adopt a heating furnace to heat and roll the blanks into finished plates, firstly, the blanks are cut and then heated and rolled, and one blank can be rolled into one size specification by only one rolling process. The existing customers have diversified requirements on the steel plate, and the steel plate has multiple thickness specifications and small length and width dimension specifications. In production, two methods are generally adopted for production. Firstly, rolling a blank with the minimum dimension specification into a large plate, and then cutting a steel plate with the small dimension specification, wherein the yield is low; and secondly, cogging the blank, rolling the thick blank into a thin blank with the thickness of 80-150 mm, cutting the thin blank into small blanks, heating and rolling the small blanks into a large plate, wherein when the small-size blank is cut into a steel plate with a high yield, the steel plate is heated and rolled twice, so that the process flow is long and the energy consumption is high. Therefore, the existing rolling process has the problems of high cost, low yield, high energy consumption and the like.
Disclosure of Invention
Aiming at the technical problems, the invention provides a preparation method of a composite wear-resistant steel plate with high strength and good wear resistance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-efficiency rolling method of a steel plate is characterized by comprising the following steps: the method comprises the steps of heating a blank in a heating furnace with the heating temperature of 1280-1300 ℃, roughly rolling the heated blank by a rolling mill for a plurality of times to form an intermediate blank, rapidly cutting the intermediate blank on a roller way to divide the intermediate blank into N small-sized intermediate blanks without cooling the intermediate blank, and rolling the plurality of small-sized intermediate blanks after cutting into finished products with different processes or different sizes, wherein N is more than or equal to 2.
Preferably, the on-line cutting of the intermediate blank needs to be carried out with temperature, the flame cutting or plasma cutting method and the like are adopted, 1 or more cutting machines are adopted for simultaneously cutting in the cutting process, and the temperature drop of the intermediate blank during cutting is less than or equal to 30 ℃.
Preferably, the cut small intermediate blank is rolled into a finished product according to a required rolling process, the rolled finished product can be subjected to water cooling or air cooling on a cooling bed, and then heat treatment is carried out according to performance requirements.
Preferably, the cut small intermediate blank is rolled into a finished product according to a required rolling process, the rolled finished product can be subjected to water cooling or air cooling on a cooling bed, and then heat treatment is carried out according to performance requirements.
Preferably, the cut small intermediate blank is rolled into a finished product according to a required rolling process, and if a controlled rolling process is adopted, the cut small intermediate blank is heated on a roller way to a target rolling temperature and then is subjected to multi-pass finish rolling to form a finished product; if a non-controlled rolling process is adopted, directly carrying out multi-pass rolling on the cut small intermediate blank to obtain a finished product; if the finished plate has a plurality of dimension specifications, the small intermediate blank can be rolled into the required dimension specification by adopting a transverse rolling and longitudinal rolling mode; the rolled finished product can be processed by adopting a controlled rolling process or a non-controlled rolling process.
Compared with the prior art, the invention has the following beneficial effects:
1. by using the efficient rolling method of the steel plate, the steel plates with a plurality of sizes and specifications and a plurality of rolling processes can be rolled simultaneously, the rolling time of the steel plates is saved, the waste of steel is reduced to a great extent, and the difficulty of subsequent sampling, cutting and processing is reduced.
2. The invention adopts an efficient rolling method of the steel plate, can meet the diversified requirements of multiple thickness specifications, small length and width dimensions and the like in the existing customer orders, can greatly improve the yield and save energy consumption.
Detailed Description
The technical solutions in the embodiments of the present invention will be 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.
The present invention is described in further detail below with reference to examples, but is not limited thereto.
Example 1
1. Placing the blank in a heating furnace at 1280-1300 ℃ for heating, and then rolling the blank into an intermediate blank, wherein the thickness of the intermediate blank is 50mm, and the final rolling temperature is 1040 +/-20 ℃;
2. rapidly cutting the intermediate blank into two pieces from the intermediate position by a cutting machine, wherein the two pieces are marked as A, B;
3. directly feeding the A small intermediate blank which does not need controlled rolling into a rolling mill to be rolled into a finished product, wherein the thickness of the finished product is 20mm, and then cooling or heat treating the finished product;
4. and (3) rolling the small intermediate billet B needing controlled rolling in a rolling mill when the temperature is up to the target temperature of 900 +/-20 ℃, wherein the final rolling temperature is 840 +/-20 ℃, the thickness of the finished product is 20mm, and then cooling or heat treatment can be carried out.
By adopting the embodiment, 2 steel plates A and B with different rolling processes can be obtained, the thickness of each steel plate A is 20mm, the steel plate A is rolled by adopting a non-controlled rolling process, and the steel plate B is rolled by adopting a controlled rolling process.
Example 2
1. Placing the blank in a heating furnace at 1280-1300 ℃ for heating, and then rolling the blank into an intermediate blank, wherein the thickness of the intermediate blank is 60mm, and the final rolling temperature is 1050 +/-20 ℃;
2. the intermediate blank was quickly cut into 3 pieces with a cutter, labeled A, B, C;
3. directly feeding the A small intermediate blank which does not need controlled rolling into a rolling mill to be rolled into a finished product, wherein the thickness of the finished product is 20mm, and then cooling or heat treating the finished product;
4. and (3) rolling the small intermediate billet B needing controlled rolling in a rolling mill when the temperature is raised to the target temperature of 930 +/-20 ℃, wherein the final rolling temperature is 870 +/-20 ℃, the thickness of the finished product is 25mm, and then cooling or heat treatment can be carried out.
5. And (3) rolling the C-size small intermediate blank to be controlled to be rolled in a rolling mill when the temperature is up to a target temperature of 880 +/-20 ℃, wherein the final rolling temperature is 780 +/-20 ℃, the thickness of the finished product is 12mm, and then cooling or heat treatment can be carried out.
By adopting the embodiment, 3 steel plates A, B and C with different rolling processes and thicknesses can be obtained, wherein the steel plate A is rolled by adopting a non-controlled rolling process and has a thickness of 20mm, the steel plate B is rolled by adopting a controlled rolling process and has a thickness of 25mm, and the steel plate C is rolled by adopting a low-temperature controlled rolling process and has a thickness of 12 mm.
Example 3
1. Placing the blank in a heating furnace at 1280-1300 ℃ for heating, and then rolling the blank into an intermediate blank, wherein the size of the intermediate blank is t1 (thickness), × C1 (width), × L1 (length);
2. the intermediate blank was quickly cut into 3 pieces with a cutter, labeled A, B, C;
3. rolling the small intermediate blank A which does not need controlled rolling in a rolling mill, firstly carrying out transverse rolling for a plurality of passes, carrying out longitudinal rolling to a target size D1 after the blank width reaches C1, and then carrying out cooling or heat treatment;
4. and (3) rolling the intermediate billet No. B needing controlled rolling in a rolling mill after the intermediate billet is heated to a target temperature, firstly rolling transversely for a plurality of times, when the width of the billet reaches C2, longitudinally rolling to a target size D2, rolling the small intermediate billet No. B in the rolling mill after the intermediate billet is heated to a target temperature of 930 +/-20 ℃, wherein the final rolling temperature is 870 +/-20 ℃, and then cooling or heat treatment can be carried out.
5. Firstly, transversely rolling the C-type intermediate billet needing controlled rolling for a plurality of passes, after the width of the billet reaches C3, longitudinally rolling the C-type intermediate billet to a target size D3, rolling the C-type intermediate billet in a rolling mill when the temperature reaches a target temperature of 880 +/-20 ℃, and cooling or heat treating the C-type intermediate billet after the final rolling temperature is 780 +/-20 ℃.
By adopting the embodiment, 3 steel plates A, B and C with different rolling processes and sizes can be obtained, the steel plate A is rolled by adopting a non-controlled rolling process, the required size D1 is obtained after transverse rolling and longitudinal rolling, the steel plate B is rolled by adopting a controlled rolling process, the required size D2 is obtained after transverse rolling and longitudinal rolling, and the steel plate C is rolled by adopting a low-temperature controlled rolling process, so that the required size D3 is obtained.
By using the technical scheme of the invention, the steel plates with a plurality of sizes and specifications and a plurality of rolling processes are rolled simultaneously, so that the rolling time of the steel plates is saved, the waste of steel is reduced to a great extent, and the difficulty of subsequent sampling, cutting and processing is reduced. Meanwhile, the yield is greatly improved, the energy consumption is saved, and the expected effect is achieved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A high-efficiency rolling method of a steel plate is characterized by comprising the following steps: the method comprises the steps of heating a blank in a heating furnace with the heating temperature of 1280-1300 ℃, roughly rolling the heated blank by a rolling mill for a plurality of times to form an intermediate blank, rapidly cutting the intermediate blank on a roller way to divide the intermediate blank into N small-sized intermediate blanks without cooling the intermediate blank, and rolling the plurality of small-sized intermediate blanks after cutting into finished products with different processes or different sizes, wherein N is more than or equal to 2.
2. The method for efficiently rolling the steel plate as claimed in claim 1, wherein the on-line cutting of the intermediate billet is performed by a method such as flame cutting or plasma cutting, the cutting process is performed by 1 or more cutting machines, and the temperature drop of the intermediate billet during cutting is less than or equal to 30 ℃.
3. The method for efficiently rolling a steel plate according to claim 1, wherein the cut small intermediate slab is rolled into a finished product according to a required rolling process, and the rolled finished product can be subjected to water cooling or air cooling on a cooling bed and then subjected to heat treatment according to performance requirements.
4. The efficient rolling method of the steel plate as claimed in claim 3, wherein the cut small intermediate blank is rolled into a finished product according to a required rolling process, and if a controlled rolling process is adopted, the cut small intermediate blank is heated on a roller table to a target rolling temperature and then is subjected to multi-pass finish rolling to form a finished product; if a non-controlled rolling process is adopted, directly carrying out multi-pass rolling on the cut small intermediate blank to obtain a finished product; if the finished plate has a plurality of dimension specifications, the small intermediate blank can be rolled into the required dimension specification by adopting a transverse rolling and longitudinal rolling mode; the rolled finished product can be processed by adopting a controlled rolling process or a non-controlled rolling process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309915.6A CN111330975A (en) | 2020-04-20 | 2020-04-20 | Efficient rolling method of steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309915.6A CN111330975A (en) | 2020-04-20 | 2020-04-20 | Efficient rolling method of steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111330975A true CN111330975A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010309915.6A Withdrawn CN111330975A (en) | 2020-04-20 | 2020-04-20 | Efficient rolling method of steel plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742871A (en) * | 2020-12-29 | 2021-05-04 | 广西南南铝加工有限公司 | High-efficiency 6000-series aluminum alloy medium plate hot rolling method |
-
2020
- 2020-04-20 CN CN202010309915.6A patent/CN111330975A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742871A (en) * | 2020-12-29 | 2021-05-04 | 广西南南铝加工有限公司 | High-efficiency 6000-series aluminum alloy medium plate hot rolling method |
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Application publication date: 20200626 |
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