CN116618435A - Production and manufacturing method of extreme thin steel plate - Google Patents
Production and manufacturing method of extreme thin steel plate Download PDFInfo
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- CN116618435A CN116618435A CN202310344881.8A CN202310344881A CN116618435A CN 116618435 A CN116618435 A CN 116618435A CN 202310344881 A CN202310344881 A CN 202310344881A CN 116618435 A CN116618435 A CN 116618435A
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- slab
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- production
- continuous casting
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000005096 rolling process Methods 0.000 claims abstract description 29
- 238000009749 continuous casting Methods 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000003303 reheating Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000002791 soaking Methods 0.000 claims abstract description 7
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 238000010304 firing Methods 0.000 abstract description 2
- 238000009628 steelmaking Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000033764 rhythmic process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
Classifications
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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
- B21B1/46—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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
A production and manufacturing method of an extreme thin steel plate belongs to the technical field of ferrous metallurgy. The continuous casting method comprises continuous casting of the slab, turning, longitudinal secondary cutting, reheating and rolling of the slab, wherein in the slab continuous casting stage, a continuous casting slab with a section of 150mm is adopted, the length of the slab is controlled to be 1500mm-2500mm, and the width of the slab is controlled to be 2200mm-2700mm; a longitudinal secondary cutting stage, wherein a steel rolling workshop adopts a longitudinal secondary cutting mode to divide a slab into two parts; in the charging stage, a rotary clamp is adopted to charge blanks, and the charging temperature is controlled to be more than 150 ℃; and in the slab reheating stage, the temperature of the heating section is controlled to be 1200-1250 ℃, the temperature of the soaking section is controlled to be 1120-1150 ℃, and the furnace time is not less than 140min. The invention provides a production and manufacturing method of an extreme thin steel plate, which has the advantages of one-firing lumber forming, no need of cogging production, effective improvement of production efficiency and the like.
Description
Technical Field
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a production and manufacturing method of an extreme thin steel plate.
Background
At present, the rolling technology of the steel plate with the limit specification (6-8 mm) has been developed in each large steel mill, and the production is mainly divided into two types. A method for producing two-fire blank includes such steps as heating 320mm blank, rolling to obtain 80-120mm blank, cutting off line, dividing it into two or three parts, heating, and rolling to obtain 6mm steel plate. The slab is heated and rolled twice in this production technology, so the slab is formed by two fires. The production technology needs two cutting and turning operations, and has the advantages of slow production rhythm of steel rolling, low average yield and high cost.
The other is a hot-forming production technology, wherein a slab with the thickness of 100-200mm is smelted in steel making, and the slab with the thickness of 6mm is directly rolled. However, some steel mills are limited by equipment conditions, the thickness of blanks is controlled to be more than 200mm, the length is controlled to be more than 2000mm due to the limitation of the specifications of the blanks heated by a heating furnace, and the length of a finished steel plate with the final 6mm is still more than 35 m even if the minimum width is calculated to be 1000 mm. The rolling size is too long (the longer the size of the finished product is, the more difficult the control of plate shape and thickness precision is), the temperature drop of several passes after rolling is fast, and the plate shape percent of pass is lower. And the more than 200mm of plate blanks are adopted to roll the 6mm of steel plates, the rolling pass is obviously more than 150mm of plate blanks to roll the 6mm of steel plates, and the more passes, the more the precision and the more difficult the control of the plate shape are. Of course, if a slab with the thickness of 100-120mm is adopted for rolling, the problem of steel plate qualification rate can be solved. However, few steel factories refine slabs with the specification, firstly, the steelmaking yield of the slabs with the thickness of 100mm is doubled with that of the slabs with the thickness of 200mm, secondly, the specifications of rolled steel plates of the slabs with the thickness of 100mm are limited, the specifications are controlled below 20mm as much as possible (otherwise, the internal quality is influenced), and the section is changed when the slabs with the section of 100mm are steelmaking, so that the production rhythm is seriously influenced.
Along with the increasing requirement of customers on the precision of the extreme thin steel plate, the conventional production level can not meet the demands of the customers, and the existing 6mm steel plate production technology still has a certain improvement space, so that the production and manufacturing method of the extreme thin steel plate is urgently needed to improve the production efficiency.
Disclosure of Invention
The technical problems to be solved are as follows: the invention provides a production and manufacturing method of an extreme thin steel plate, which aims at solving the technical problems and has the advantages of one-firing production, no need of cogging production, effective improvement of production efficiency and the like.
The technical scheme is as follows: a production and manufacturing method of an extreme thin steel plate comprises the following specific steps: the continuous casting method comprises continuous casting of the slab, turning, longitudinal secondary cutting, reheating and rolling of the slab, wherein in the slab continuous casting stage, a continuous casting slab with a section of 150mm is adopted, the length of the slab is controlled to be 1500mm-2500mm, and the width of the slab is controlled to be 2200mm-2700mm; in the charging stage, a rotary clamp is adopted to charge blanks, and the charging temperature is controlled to be more than 150 ℃; in the slab reheating stage, the temperature of a heating section is controlled to be 1200-1250 ℃, the temperature of a soaking section is controlled to be 1120-1150 ℃, and the furnace time is not less than 140min; in the rolling stage, the blank is uniformly heated through the relatively high temperature of 1200-1250 ℃ in the heating process, the relatively low temperature of 1120-1150 ℃ in the soaking stage is rolled at a low temperature, and the burning loss is reduced.
Preferably, the thickness of the extreme thin gauge steel sheet is 6mm.
Preferably, the rolling mill adopts a longitudinal two-cutting mode in the longitudinal two-cutting stage to divide the slab into two parts longitudinally.
Preferably, in the charging stage, a rotary clamp is adopted to charge blanks, and the charging temperature is controlled between 169 and 198 ℃.
Preferably, the slab reheating stage is performed for 154-162 min in the furnace.
The beneficial effects are that: (1) The invention provides a production and manufacturing method of an extreme thin steel plate, which is applied to the production of steel plates such as low alloy structural steel, ship plate steel and the like, and is applicable to the thickness of 6mm;
(2) The invention adopts 150mm plate blank rolling, realizes one-fire forming, does not need cogging production, and can effectively improve the production efficiency. Compared with a section with the thickness of 120mm, the steel-making efficiency can be effectively improved. Compared with a slab two-fire cogging production mode with the thickness of 220mm and above, the production process can be effectively simplified, and the rolling efficiency is improved.
(3) The method has the advantages that the control level of the thickness precision of the rolled steel plate is higher, and the thickness precision of the 6mm steel plate is controlled within 0.3 mm.
In conclusion, the manufacturing process adopts the plate blank with the thickness of 150mm to produce, comprehensively considers various factors of steel making and rolling, ensures the steel making rhythm, and does not need to change sections frequently (the plate blank with the thickness of 150mm can roll a steel plate with the specification of 6-25mm, and the rolling range is relatively large). Meanwhile, the problems of the hour yield and the qualification rate of steel rolling are guaranteed as much as possible, and the method has great popularization advantage.
Detailed Description
The invention is further described below in connection with specific embodiments.
Examples
A production and manufacturing method of an extreme thin steel plate, wherein the thickness of the extreme thin steel plate is 6mm, and the production and manufacturing method comprises the following specific steps: the continuous casting method comprises continuous casting of the slab, turning, longitudinal secondary cutting, reheating and rolling of the slab, wherein in the slab continuous casting stage, a continuous casting slab with a section of 150mm is adopted, the length of the slab is controlled to be 1500mm-2500mm, and the width of the slab is controlled to be 2200mm-3000mm; a longitudinal secondary cutting stage, wherein a steel rolling workshop adopts a longitudinal secondary cutting mode to divide a slab into two parts; in the charging stage, a rotary clamp is adopted to charge blanks, and the charging temperature is controlled to be more than 150 ℃; in the slab reheating stage, the temperature of a heating section is controlled to be 1200-1250 ℃, the temperature of a soaking section is controlled to be 1120-1150 ℃, and the furnace time is not less than 140min; in the rolling stage, the blank is uniformly heated through the relatively high temperature of 1200-1250 ℃ in the heating process, the relatively low temperature of 1120-1150 ℃ in the soaking stage is rolled at a low temperature, and the burning loss is reduced. The rolling production of 6mm steel plates was carried out on 150mm section continuous casting slabs and 80mm section continuous casting slabs (80 mm from 220mm section slabs was rolled first), and specific parameters during the production are shown in tables 1 and 2 below.
Table 1: production condition of rolling 6mm steel plate by 150mm plate blank
Table 2: production condition of rolling 6mm steel plate by 80mm plate blank (cogging material)
The results of the control of the thickness precision of the 150mm slab rolled 6mm steel sheet and the control of the thickness precision of the 80mm slab (cogged) rolled 6mm steel sheet are shown in tables 3 and 4.
Table 3: thickness precision control condition of 150mm plate blank rolled 6mm steel plate
Table 4: control of thickness precision of rolled 6mm steel plate of 80mm plate blank (cogging material)
From the practical cases, it can be obviously concluded that the production mode of cogging and rolling the slab with 220mm to a thickness of 80mm and rolling the slab with 80mm to a thickness of 6mm is complex in flow, poor in production efficiency and low in hour yield. And a 150mm plate blank is adopted to roll a 6mm steel plate, so that the yield is obviously improved under the condition of ensuring the thickness precision. The production efficiency of the slabs with the thickness of 100mm and 120mm is lower than that of the slab with the thickness of 150 mm. The production mode has great popularization value.
Claims (5)
1. The production and manufacturing method of the extreme thin steel plate is characterized by comprising the following specific steps of: the continuous casting method comprises continuous casting of the slab, turning, longitudinal secondary cutting, reheating and rolling of the slab, wherein in the slab continuous casting stage, a continuous casting slab with a section of 150mm is adopted, the length of the slab is controlled to be 1500mm-2500mm, and the width of the slab is controlled to be 2200mm-2700mm; in the charging stage, a rotary clamp is adopted to charge blanks, and the charging temperature is controlled to be more than 150 ℃; in the slab reheating stage, the temperature of a heating section is controlled to be 1200-1250 ℃, the temperature of a soaking section is controlled to be 1120-1150 ℃, and the furnace time is not less than 140min; in the rolling stage, the blank is uniformly heated through the relatively high temperature of 1200-1250 ℃ in the heating process, the relatively low temperature of 1120-1150 ℃ in the soaking stage is rolled at a low temperature, and the burning loss is reduced.
2. The manufacturing method of an extreme thin gauge steel sheet as claimed in claim 1, wherein the thickness of the extreme thin gauge steel sheet is 6mm.
3. The manufacturing method of a sheet steel of extreme thin gauge according to claim 1, wherein the longitudinal double-cutting stage is a longitudinal double-cutting mode adopted in a rolling mill to divide the slab into two parts in the longitudinal direction.
4. The method according to claim 1, wherein the charging step is performed by charging the blank with a rotary clamp, and the charging temperature is controlled to 169-198 ℃.
5. The method for manufacturing a very thin gauge steel sheet as set forth in claim 1, wherein the slab reheating stage is performed for a furnace time of 154-162 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310344881.8A CN116618435A (en) | 2023-04-03 | 2023-04-03 | Production and manufacturing method of extreme thin steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310344881.8A CN116618435A (en) | 2023-04-03 | 2023-04-03 | Production and manufacturing method of extreme thin steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116618435A true CN116618435A (en) | 2023-08-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310344881.8A Pending CN116618435A (en) | 2023-04-03 | 2023-04-03 | Production and manufacturing method of extreme thin steel plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN116618435A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002292403A (en) * | 2002-05-13 | 2002-10-08 | Cbmm Asia Co Ltd | Hot rolling method of highly tough steel material using thin cast slab |
| WO2008000396A1 (en) * | 2006-06-26 | 2008-01-03 | Sms Demag Ag | A method and a system for producing hot-rolled strip silicon steel based on thin slabs |
| CN101391264A (en) * | 2007-09-19 | 2009-03-25 | 中冶赛迪工程技术股份有限公司 | Technique method of thin middle plate continuous casting and rolling production |
| US20090205756A1 (en) * | 2006-07-10 | 2009-08-20 | Nobuyuki Nakamura | Hot-rolled thin steel sheet with excellent formability and excellent strength and toughness after heat treatment, and method for manufacturing the same |
| CN110735085A (en) * | 2019-09-25 | 2020-01-31 | 江苏沙钢集团有限公司 | Manufacturing method of thin Q345qE and Q370qE steel plates |
| CN112267072A (en) * | 2020-09-30 | 2021-01-26 | 江苏沙钢集团有限公司 | Economical thin Q355B steel plate and preparation method thereof |
| CN112658030A (en) * | 2020-12-03 | 2021-04-16 | 南京钢铁股份有限公司 | Rolling method of wide and thin high-nickel-molybdenum austenitic stainless steel plate |
| CN114645188A (en) * | 2022-02-08 | 2022-06-21 | 包头钢铁（集团）有限责任公司 | Method for efficiently producing hot-rolled steel strip for 2-4 mm extreme thin-specification high-quality stirring tank with tensile strength of 650MPa |
-
2023
- 2023-04-03 CN CN202310344881.8A patent/CN116618435A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002292403A (en) * | 2002-05-13 | 2002-10-08 | Cbmm Asia Co Ltd | Hot rolling method of highly tough steel material using thin cast slab |
| WO2008000396A1 (en) * | 2006-06-26 | 2008-01-03 | Sms Demag Ag | A method and a system for producing hot-rolled strip silicon steel based on thin slabs |
| US20090205756A1 (en) * | 2006-07-10 | 2009-08-20 | Nobuyuki Nakamura | Hot-rolled thin steel sheet with excellent formability and excellent strength and toughness after heat treatment, and method for manufacturing the same |
| CN101391264A (en) * | 2007-09-19 | 2009-03-25 | 中冶赛迪工程技术股份有限公司 | Technique method of thin middle plate continuous casting and rolling production |
| CN110735085A (en) * | 2019-09-25 | 2020-01-31 | 江苏沙钢集团有限公司 | Manufacturing method of thin Q345qE and Q370qE steel plates |
| CN112267072A (en) * | 2020-09-30 | 2021-01-26 | 江苏沙钢集团有限公司 | Economical thin Q355B steel plate and preparation method thereof |
| CN112658030A (en) * | 2020-12-03 | 2021-04-16 | 南京钢铁股份有限公司 | Rolling method of wide and thin high-nickel-molybdenum austenitic stainless steel plate |
| CN114645188A (en) * | 2022-02-08 | 2022-06-21 | 包头钢铁（集团）有限责任公司 | Method for efficiently producing hot-rolled steel strip for 2-4 mm extreme thin-specification high-quality stirring tank with tensile strength of 650MPa |
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