CN116475235A - Method for reducing quantity of weather-resistant steel casting-on plate in sheet billet continuous casting and rolling production line - Google Patents
Method for reducing quantity of weather-resistant steel casting-on plate in sheet billet continuous casting and rolling production line Download PDFInfo
- Publication number
- CN116475235A CN116475235A CN202310469635.5A CN202310469635A CN116475235A CN 116475235 A CN116475235 A CN 116475235A CN 202310469635 A CN202310469635 A CN 202310469635A CN 116475235 A CN116475235 A CN 116475235A
- Authority
- CN
- China
- Prior art keywords
- casting
- rolling
- steel
- continuous casting
- reducing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 73
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 50
- 239000010959 steel Substances 0.000 title claims abstract description 50
- 238000009749 continuous casting Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000005266 casting Methods 0.000 claims abstract description 52
- 229910000870 Weathering steel Inorganic materials 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 230000006698 induction Effects 0.000 claims abstract description 7
- 238000003723 Smelting Methods 0.000 claims abstract description 5
- 239000000498 cooling water Substances 0.000 claims description 8
- 230000001965 increasing effect Effects 0.000 claims description 6
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 230000002068 genetic effect Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004801 process automation Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- B21B1/463—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 continuous process, i.e. the cast not being cut before rolling
-
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a method for reducing the initial casting plate yield of weather-resistant steel in a sheet billet continuous casting and rolling production line, belonging to the field of steel, and comprising smelting, continuous casting, rough rolling, induction heating, finish rolling, cooling and coiling. Controlling the temperature difference and the pulling speed of a continuous casting billet, controlling the rough rolling outlet temperature and the rolling reduction of three frames, performing finish rolling and leveling, controlling side guide plates, and performing coiling side guide plate control. Compared with the prior art, the invention ensures the state of casting the weathering steel into the steel, and improves the coiling rate of the steel coil.
Description
Technical Field
The invention relates to a steel production technology, in particular to a method for reducing the quantity of a weather-resistant steel casting plate suitable for a thin slab continuous casting and rolling production line.
Background
The continuous casting and rolling production line produces the weathering steel coiled plate, but the temperature of the cast-in plate blank is lower than 900 ℃ because of higher weathering steel strength, the torque of a rough rolling mill is large, and the production state of finish rolling steel is poor, so that the cast-in plate blank is easy to have a fault of finishing rolling threading of the weathering steel. Therefore, in the production of weather-resistant steel in the existing sheet bar continuous casting and rolling production line, 3-5 middle plates are required to be produced by adopting a PlateMode (middle plate production mode), the middle plates are sheared through pendulum shears, a rolling line is pushed out, and then the production mode is switched to a CoileMode (coil production mode) to roll strip steel in a finishing mill.
And the quantity of the plate in casting reduces the coiling rate of the steel coil and has limited operation profit. Therefore, how to develop a method suitable for reducing the quantity of the weather-resistant steel casting production plates of a thin slab continuous casting and rolling production line in the normal reduction of the weather-resistant steel casting is a key for reducing the cost and enhancing the efficiency in the field in the industry.
Disclosure of Invention
The technical task of the invention is to provide a method for reducing the quantity of the weather-resistant steel casting plate in the sheet billet continuous casting and rolling production line aiming at the defects of the prior art, and the production mode of normal steel feeding of the weather-resistant steel casting secondary casting is realized by matching and adjusting in multiple aspects such as continuous casting technology, load distribution, cooling water quantity control, heating technology of a heating furnace, finish rolling leveling control, side guide plate system setting and the like, so that the steel feeding state of the weather-resistant steel casting is ensured, the coiling rate of steel coils is improved, and the purposes of reducing cost and increasing efficiency are achieved.
The technical scheme for solving the technical problems is as follows: a method for reducing the quantity of a weather-resistant steel casting-on plate in a sheet billet continuous casting and rolling production line is characterized by comprising the following steps of: the process comprises the following steps:
s1, smelting;
s2, continuous casting: the temperature difference of the casting blank is less than or equal to 30 ℃, and the continuous casting pulling speed of the casting blank head part when the casting blank is discharged from the R3 frame is more than or equal to 3.8m/min;
s3, rough rolling: tandem rolling is adopted by three frames; the rough rolling outlet temperature is not lower than 910 ℃; the three frame rolling reduction rates are distributed according to the proportion of 42%, 43% and 40%; the cooling water quantity of the casting roller is adjusted to be 50% when the platform mode is used, and the cooling water quantity is restored to be 100% when the CoilMode is used;
s4, induction heating:
s5, finish rolling: adopting five frames for continuous rolling; the roll convexities of the F4 and F5 frame are increased; performing finish rolling leveling control: setting a leveling value of the casting-in steel, and controlling the center line of the head of the strip steel within +/-50 mm; performing side guide plate control;
s6, cooling: laminar cooling is adopted;
s7, coiling: and (5) performing coiling side guide plate control.
Furthermore, the weather-resistant steel is SPA-H brand.
Further, the composition design range of the weathering steel is as follows: c:0.03-0.05%, si:0.3-0.60%, mn:0.4-0.55%, cu:0.26-0.4%, ti: less than or equal to 0.04 percent, cr:0.31-0.6%, S: less than or equal to 0.005 percent, P: less than or equal to 0.01 percent, and the balance of Fe and unavoidable impurities.
Further, the thickness of the slab obtained in the continuous casting process is 95-110mm.
Further, in the rough rolling step, the torque of each frame is less than 55% and the load is less than 20MN.
Further, in the induction heating step, the temperature of the heating furnace was set to 1160 ℃.
Further, in the finish rolling step, the leveling value setting method includes: the adjustment quantity of the steel feeding straight plate shape of the first 3-6 casting times in the past data is selected as the long and short genetic data, and specifically comprises the following steps: the previous 3 casting times are used as leveling values for the re-cast steel, and the previous 6 casting time long inheritance is used as a manual confirmation reference value.
Further, in the finish rolling step, the side guide plate is controlled to: the front guide roller of the finishing mill is given according to the head short stroke of 120mm and the middle short stroke of 30 mm; the rolling mill side guide short stroke control is given by 120mm of head short stroke and 40mm of middle short stroke.
In the cooling step, the laminar cooling is performed in a 10-meter-head non-cooling mode.
In the winding step, the winding side guide is controlled by two short strokes.
Compared with the prior art, the invention has the following outstanding beneficial effects:
1. according to the invention, stable rolling is realized while reducing the yield of the middle plate by changing the technological parameters of the weathering steel of the continuous casting and rolling production line, the yield of the casting starting middle plate is reduced from 21.9t to 10.47t, and the casting starting middle plate is effectively reduced;
2. the invention improves the coiling rate of the steel coil while ensuring the open casting steel state of the weathering steel, and increases the output of the steel coil by 11.43t in average single casting time, thereby achieving the aims of reducing the cost and enhancing the efficiency;
3. the invention is applied to a continuous casting and rolling production line, and can effectively solve the problem of failure in finish rolling and threading caused by unstable strip shape of the weather-resistant steel which is penetrated at low speed and low temperature.
Detailed Description
The invention is further described below in connection with the following detailed description.
For the purposes of the following detailed description, it is to be understood that the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary. Furthermore, all numbers expressing, for example, quantities of ingredients used in the specification and claims, other than in any operating example or where otherwise indicated, are to be understood as being modified in all instances by the term "about". At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
It should also be understood that any numerical range recited herein is intended to include all sub-ranges subsumed therein. For example, a range of "1 to 10" is intended to include all subranges between (and including) the stated minimum value of 1 and the stated maximum value of 10, that is, having a minimum value equal to or greater than 1 and a maximum value equal to or less than 10.
In this application, the use of the singular includes the plural and plural encompasses singular, unless specifically stated otherwise. In addition, in this application, unless explicitly stated otherwise, the use of "or" means "and/or", even though "and/or" may be explicitly used in certain instances. Further, in this application, the use of "a" or "an" means "at least one" unless specifically stated otherwise. For example, "a" first material, "a" coating composition, etc., refer to one or more of any of these items.
The invention relates to a method for reducing the quantity of a weather-resistant steel casting-on plate in a sheet billet continuous casting-rolling production line.
The method comprises the following specific steps:
s1, smelting
In the embodiment, SPA-H brand weathering steel is adopted, and the component design range is as follows: c:0.03-0.05%, si:0.3-0.60%, mn:0.4-0.55%, cu:0.26-0.4%, ti: less than or equal to 0.04 percent, cr:0.31-0.6%, S: less than or equal to 0.005 percent, P: less than or equal to 0.01 percent, and the balance of Fe and unavoidable impurities.
S2, continuous casting
And smelting in a decarburization furnace and an LF furnace according to the components, and then continuously casting and casting.
Continuous casting ensures that the temperature difference of the casting blank is less than or equal to 30 ℃, and the continuous casting pulling speed of the casting blank head is more than or equal to 3.8m/min when the casting blank head is discharged from the R3 frame.
The thickness of the plate blank is 95-110mm according to actual requirements.
S3, rough rolling
The roughing mill adopts three-frame continuous rolling. The rough rolling outlet temperature is not lower than 910 ℃.
The thickness of the rough rolling intermediate billet is selected to be 16-18 mm.
The rough rolling load distribution mode R1 is transferred to R2 and R3, the load distribution adopts preset parameters of a process automation secondary system, and the three frame rolling reduction rates are distributed according to the proportion of 42%, 43% and 40%. As the rolling temperature is reduced from frame to frame, the rolling force is increased from frame to frame. Ensuring that the rolling reduction of each stand torque is below 55% and the load is below 20MN.
And (3) adjusting the cooling water quantity of the casting roller: the production pattern signal is collected in a basic automation program: the cooling water amount was adjusted to 50% at the planemode and to 100% at the coiemode. Automatic control is realized, and the temperature loss of the casting blank can be reduced in the casting blank reduction process.
S4, induction heating
When the intermediate billet enters the induction heating furnace, the temperature of the heating furnace is set to 1160 ℃ from the conventional 1140 ℃, the heating effect of the head part of the strip steel is ensured, and the damage to the roller caused by mechanical impact to the roller due to low temperature, high strength of the strip steel in the finish rolling and threading process is prevented.
S5, finish rolling
The finishing mill adopts five-frame continuous rolling.
(1) And F4, F5 frame roller shape convexity adjustment:
the convexity is increased by 20 mu m compared with the conventional steel, the specific convexity in the embodiment is 250 mu m, and the middle wave trend caused by low steel feeding temperature is relieved.
Performing finish rolling leveling control: the leveling value of the cast-in steel is set, and the leveling value aims to effectively control the center line of the head of the strip steel within +/-50 mm and prevent steel scrap accidents caused by collision of the strip steel with a side guide plate of a last stand. The leveling value setting method in this embodiment is as follows: forming a database aiming at data calibrated by different support rollers and different ladder pads, and selecting the adjustment quantity of the steel feeding straight plate shape of the previous 3-6 casting times in the previous data as long and short genetic data, wherein the adjustment quantity is specifically as follows: the previous 3 casting times are used as leveling values for the re-cast steel, and the previous 6 casting time long inheritance is used as a manual confirmation reference value.
(2) And (3) performing side guide plate control:
the front guide roller of the finishing mill is given by 120mm of head short stroke and 30mm of middle short stroke. The rolling mill side guide short stroke control is given by 120mm of head short stroke and 40mm of middle short stroke.
The short stroke of the head is carried out in place before the steel is fed in plateMode, and the short stroke of the middle is carried out when the head of the intermediate billet is 1 meter away from the rolling mill (after the head enters the parallel section of the side guide plate) and is carried out in place before the rolling mill bites the steel. Before the rolling mill bites steel, the centering correction of the side guide plate to the intermediate billet is finished, the centering of the rolling center is ensured, and the camber is reduced in the stand.
S6, cooling
In order to ensure smooth coiling of the head, the laminar cooling adopts a head 10-meter uncooled mode, namely a head 10-meter laminar cooling water valve is in a closed state, and after 10 meters, the head is subjected to primary closed-loop control according to secondary setting.
S7, coiling
The coiling side guide plate adopts twice short-stroke control: after the head enters the parallel section of the coiling side guide plate, a short stroke is given according to 100 mm; the second short pass was given at 50mm after the pinch rolls bite.
Before the two short strokes are executed in place, the head reaches the winding drum, so that the tower-shaped defect formed by head camber is ensured not to exceed the national standard.
The invention realizes the production mode of normal steel feeding of the weathering steel casting time casting, reduces the output of the casting middle plate from 21.9t to 10.47t, and effectively reduces the output of the casting middle plate. The method has the advantages that the steel-in state of the weathering steel is ensured, the coiling rate of the steel coil is improved, the output of the average single-pouring steel coil is increased by 11.43t, and the aims of reducing the cost and enhancing the efficiency are fulfilled.
It is noted that while the present invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications can be made therein without departing from the spirit and scope thereof.
Claims (10)
1. A method for reducing the quantity of a weather-resistant steel casting-on plate in a sheet billet continuous casting and rolling production line is characterized by comprising the following steps of: the process comprises the following steps:
s1, smelting;
s2, continuous casting: the temperature difference of the casting blank is less than or equal to 30 ℃, and the continuous casting pulling speed of the casting blank head part when the casting blank is discharged from the R3 frame is more than or equal to 3.8m/min;
s3, rough rolling: tandem rolling is adopted by three frames; the rough rolling outlet temperature is not lower than 910 ℃; the three frame rolling reduction rates are distributed according to the proportion of 42%, 43% and 40%; the cooling water quantity of the casting roller is adjusted to be 50% when the platform mode is used, and the cooling water quantity is restored to be 100% when the CoilMode is used;
s4, induction heating:
s5, finish rolling: adopting five frames for continuous rolling; the roll convexities of the F4 and F5 frame are increased; performing finish rolling leveling control: setting a leveling value of the casting-in steel, and controlling the center line of the head of the strip steel within +/-50 mm; performing side guide plate control;
s6, cooling: laminar cooling is adopted;
s7, coiling: and (5) performing coiling side guide plate control.
2. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 1, which is characterized in that: the weather-resistant steel is SPA-H brand.
3. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 2, which is characterized in that: the composition design range of the weathering steel is as follows: c:0.03-0.05%, si:0.3-0.60%, mn:0.4-0.55%, cu:0.26-0.4%, ti: less than or equal to 0.04 percent, cr:0.31-0.6%, S: less than or equal to 0.005 percent, P: less than or equal to 0.01 percent, and the balance of Fe and unavoidable impurities.
4. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 1, which is characterized in that: the thickness of the slab obtained in the continuous casting process is 95-110mm.
5. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 1, which is characterized in that: in the rough rolling process, the torque of each frame is lower than 55% and the load is lower than 20MN.
6. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 1, which is characterized in that: in the induction heating step, the temperature of the heating furnace was set to 1160 ℃.
7. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 1, which is characterized in that: in the finish rolling process, the leveling value setting method comprises the following steps: the adjustment quantity of the steel feeding straight plate shape of the first 3-6 casting times in the past data is selected as the long and short genetic data, and specifically comprises the following steps: the previous 3 casting times are used as leveling values for the re-cast steel, and the previous 6 casting time long inheritance is used as a manual confirmation reference value.
8. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 1, which is characterized in that: in the finish rolling process, the side guide plate is controlled as follows: the front guide roller of the finishing mill is given according to the head short stroke of 120mm and the middle short stroke of 30 mm; the rolling mill side guide short stroke control is given by 120mm of head short stroke and 40mm of middle short stroke.
9. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 1, which is characterized in that: in the cooling procedure, laminar cooling adopts a head 10m uncooled mode.
10. The method for reducing the initial casting plate quantity of the weathering steel in the thin slab continuous casting and rolling line according to claim 1, which is characterized in that: in the coiling procedure, the coiling side guide plate adopts twice short-stroke control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310469635.5A CN116475235A (en) | 2023-04-27 | 2023-04-27 | Method for reducing quantity of weather-resistant steel casting-on plate in sheet billet continuous casting and rolling production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310469635.5A CN116475235A (en) | 2023-04-27 | 2023-04-27 | Method for reducing quantity of weather-resistant steel casting-on plate in sheet billet continuous casting and rolling production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116475235A true CN116475235A (en) | 2023-07-25 |
Family
ID=87224809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310469635.5A Pending CN116475235A (en) | 2023-04-27 | 2023-04-27 | Method for reducing quantity of weather-resistant steel casting-on plate in sheet billet continuous casting and rolling production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116475235A (en) |
-
2023
- 2023-04-27 CN CN202310469635.5A patent/CN116475235A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6092586A (en) | Method and arrangement for producing hot-rolled steel strip | |
| RU2477661C2 (en) | Method of adjusting thickness of cogged ingot fed through multi-stand mill, feed-forward and/or closed-loop control device, and rolling mill stand | |
| CN109161797B (en) | Lightweight fatigue-resistant hot-rolled dual-phase wheel steel and production method thereof | |
| CN107617647B (en) | Method for producing hot-rolled strip steel with thickness less than or equal to 1.2mm by continuous casting and rolling of sheet billet | |
| JPH10277601A (en) | Rolling method for thin and flat product and related rolling line | |
| UA55414C2 (en) | Method for manufacture of a steel strip | |
| CN112077152B (en) | Shape control method of high-strength steel for commercial vehicle longitudinal beam | |
| CN101147920A (en) | Control method for surface scale of hot rolled steel plate for vanadium-containing automobile beam | |
| EP0841995A1 (en) | High-speed thin-slabbing plant | |
| CN103506405A (en) | Method for compensating finish rolling gap during mixed stainless steel rolling | |
| KR20130099091A (en) | Method for producing steel strips by continuous rolling or semi-continuous rolling | |
| CA2515097A1 (en) | Method for milling thin and/or thick slabs made of steel materials into hot-rolled strip | |
| CN108838213B (en) | Roughing vertical roll idle-passing method | |
| CN111375636A (en) | Automatic tapping identification method based on rolling process parameter analysis | |
| CN112893481A (en) | Shape control method for high-strength low-alloy steel hot-rolled strip steel | |
| CN116475235A (en) | Method for reducing quantity of weather-resistant steel casting-on plate in sheet billet continuous casting and rolling production line | |
| JP2006055884A (en) | Method for manufacturing hot-rolled steel sheet and apparatus for controlling rolling | |
| CN101590488A (en) | A kind of Bar Rolling Process of hot-strip roughing operation | |
| CN113275385A (en) | Method for dynamically controlling to-be-rolled position of single-stand rolling mill | |
| US20230271247A1 (en) | Casting-rolling integrated plant for producing a hot-rolled finished strip from a steel melt | |
| CN112845584B (en) | Method for effectively controlling longitudinal shearing, splitting and side bending of hot-rolled strip steel | |
| CN114700364B (en) | Method for improving hot rolling stability of 75Cr1 saw blade steel | |
| RU2679159C1 (en) | Method of manufacture of specially thin hot-rolled stripes on a wide-striped mill of the casting complex | |
| CN116393520A (en) | Single-frame wide and thick plate rolling line ladder temperature-waiting production method and system | |
| CN112170505B (en) | Roughing mill speed control method for improving rolling stability of thin specifications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |