EP2067541A1 - Method for continuously manufacturing cold-rolled steel - Google Patents
Method for continuously manufacturing cold-rolled steel Download PDFInfo
- Publication number
- EP2067541A1 EP2067541A1 EP07254712A EP07254712A EP2067541A1 EP 2067541 A1 EP2067541 A1 EP 2067541A1 EP 07254712 A EP07254712 A EP 07254712A EP 07254712 A EP07254712 A EP 07254712A EP 2067541 A1 EP2067541 A1 EP 2067541A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cold
- steel
- rolled steel
- annealing
- rolled
- 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.)
- Granted
Links
- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 77
- 239000010959 steel Substances 0.000 claims abstract description 77
- 238000009434 installation Methods 0.000 claims abstract description 40
- 238000005097 cold rolling Methods 0.000 claims abstract description 28
- 238000005554 pickling Methods 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 18
- 238000000137 annealing Methods 0.000 claims abstract description 16
- 238000005238 degreasing Methods 0.000 claims abstract description 10
- 229910001208 Crucible steel Inorganic materials 0.000 claims abstract description 8
- 238000005098 hot rolling Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 238000009966 trimming Methods 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
Images
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
- B21B1/22—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
- B21B1/28—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 cold-rolling, e.g. Steckel cold mill
-
- 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
-
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
-
- 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
-
- 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
- B21B15/0085—Joining ends of material to continuous strip, bar or sheet
-
- 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
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
-
- 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
- B21B2015/0064—Uncoiling the rolled product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/08—Braking or tensioning arrangements
-
- 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
- B21B45/02—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 for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
Definitions
- the invention relates to a method for continuously manufacturing cold-rolled steel, more particularly to a method for continuously manufacturing cold-rolled steel from white steel.
- a conventional process for making stainless steel essentially includes casting, hot rolling, and cold rolling.
- a steel slab obtained from casting is hot rolled to obtain a black steel coil, which is then annealed and pickled to obtain a white steel coil.
- the white steel coil can be further processed by cold rolling, annealing, pickling, temper rolling, tension leveling, etc., to obtain a steel coil product.
- the product obtained by cold rolling, annealing, and pickling is known as a 2D steel coil
- the product obtained by further temper rolling and tension leveling the 2D steel coil is known as a 2B steel coil.
- a conventional process for manufacturing cold-rolled steel is conducted using a multi-stage production line including a steel coil preparation installation 11, a cold rolling installation 12, an annealing-pickling installation 13, a temper rolling installation 14, and a tension leveling installation 15, which are separate from one another.
- the steel coil preparation installation 11 is used for uncoiling a white steel coil 100 into a white steel strip 400, which is welded with guide portions each having a length of 8-10 meters at two ends thereof and is then coiled into a steel coil 200.
- the steel coil 200 is transported to the cold rolling installation 12.
- the steel coil 200 is uncoiled into a steel strip 400, which passes through the cold rolling installation 12.
- the cold rolling installation 12 is a 20-high cold rolling mill, and is used for cold rolling the steel strip 400 to have a predetermined thickness.
- the steel strip 400 after cold rolling is coiled into a steel coil 200, which is transported to the annealing-pickling installation 13.
- the steel coil 200 is uncoiled into a steel strip 400, which passes through the annealing-pickling installation 13, in which the steel strip 400 is annealed, and is then pickled to remove scale from the steel strip 400.
- the steel strip 400 after pickling is coiled into a steel coil 200, which is the 2D steel coil.
- the 2D steel coil 200 can be further transported to the temper rolling installation 14.
- the steel coil 200 is uncoiled into a steel strip 400, which passes through the temper rolling installation 14.
- the temper rolling installation 14 is used for imposing gloss on the steel strip 400.
- the steel strip 400 after temper' rolling is coiled into a steel coil 200, which is transported to the tension leveling installation 15.
- the steel coil 200 is uncoiled into a steel strip 400, which passes through the tension leveling installation 15, in which the steel strip 400 is tension leveled, and is then trimmed and coiled to obtain a steel coil product 300 (i.e., the 2B steel coil).
- U.S. Patent No. 6,478,899 discloses a method and an installation for making a cold-rolled stainless steel strip, and consists of continuously executing on a single production line all the process steps for fabricating a cold-rolled stainless strip from a thin strip cast directly from liquid metal, i.e., from the casting step through finishing steps to packaging the strip in the form of a coil.
- the method and installation disclosed therein start from casting a stainless steel strip directly from liquid metal, the operating units and steps involved are relatively complicated. Therefore, the technique disclosed therein is impractical for use in the industry.
- U.S. Patent No. 6,546,771 discloses a method for manufacturing strips of stainless steel, which comprises rolling in cold condition of strips which in a foregoing process have been manufactured through strip casting and/or have been hot rolled. According to various specific wants of the final product, the stainless steel shall pass once or twice through a rolling mill line. Additionally, the rolling mill line or parts of it also can be used for processes which are aimed at manufacturing strips with various specific features that are of significant importance for some applications. Since parts of the rolling mill line should be stopped in view of the specific requirements for the final product, the utilization rate of the rolling mill line is relatively low.
- the object of the present invention is to provide a method for continuously manufacturing cold-rolled steel to overcome the aforementioned shortcomings of the prior art.
- the method for continuously manufacturing cold-rolled steel of this invention includes the steps of:
- the preferred embodiment of a method for continuously manufacturing cold-rolled steel according to this invention includes the steps of:
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
- The invention relates to a method for continuously manufacturing cold-rolled steel, more particularly to a method for continuously manufacturing cold-rolled steel from white steel.
- A conventional process for making stainless steel essentially includes casting, hot rolling, and cold rolling. A steel slab obtained from casting is hot rolled to obtain a black steel coil, which is then annealed and pickled to obtain a white steel coil. The white steel coil can be further processed by cold rolling, annealing, pickling, temper rolling, tension leveling, etc., to obtain a steel coil product. The product obtained by cold rolling, annealing, and pickling is known as a 2D steel coil, and the product obtained by further temper rolling and tension leveling the 2D steel coil is known as a 2B steel coil.
- Referring to
Figure 1 , a conventional process for manufacturing cold-rolled steel is conducted using a multi-stage production line including a steelcoil preparation installation 11, acold rolling installation 12, an annealing-pickling installation 13, atemper rolling installation 14, and atension leveling installation 15, which are separate from one another. - The steel
coil preparation installation 11 is used for uncoiling awhite steel coil 100 into awhite steel strip 400, which is welded with guide portions each having a length of 8-10 meters at two ends thereof and is then coiled into asteel coil 200. Thesteel coil 200 is transported to thecold rolling installation 12. - The
steel coil 200 is uncoiled into asteel strip 400, which passes through thecold rolling installation 12. Thecold rolling installation 12 is a 20-high cold rolling mill, and is used for cold rolling thesteel strip 400 to have a predetermined thickness. Thesteel strip 400 after cold rolling is coiled into asteel coil 200, which is transported to the annealing-pickling installation 13. - The
steel coil 200 is uncoiled into asteel strip 400, which passes through the annealing-pickling installation 13, in which thesteel strip 400 is annealed, and is then pickled to remove scale from thesteel strip 400. Thesteel strip 400 after pickling is coiled into asteel coil 200, which is the 2D steel coil. - The
2D steel coil 200 can be further transported to thetemper rolling installation 14. Thesteel coil 200 is uncoiled into asteel strip 400, which passes through thetemper rolling installation 14. Thetemper rolling installation 14 is used for imposing gloss on thesteel strip 400. Thesteel strip 400 after temper' rolling is coiled into asteel coil 200, which is transported to thetension leveling installation 15. - The
steel coil 200 is uncoiled into asteel strip 400, which passes through thetension leveling installation 15, in which thesteel strip 400 is tension leveled, and is then trimmed and coiled to obtain a steel coil product 300 (i.e., the 2B steel coil). - Since the
installations - In order to overcome the aforesaid shortcomings encountered in the conventional multi-stage production line, it is desirable in the art to develop a continuous production line for manufacturing cold-rolled steel.
-
U.S. Patent No. 6,478,899 discloses a method and an installation for making a cold-rolled stainless steel strip, and consists of continuously executing on a single production line all the process steps for fabricating a cold-rolled stainless strip from a thin strip cast directly from liquid metal, i.e., from the casting step through finishing steps to packaging the strip in the form of a coil. However, since the method and installation disclosed therein start from casting a stainless steel strip directly from liquid metal, the operating units and steps involved are relatively complicated. Therefore, the technique disclosed therein is impractical for use in the industry. -
U.S. Patent No. 6,546,771 discloses a method for manufacturing strips of stainless steel, which comprises rolling in cold condition of strips which in a foregoing process have been manufactured through strip casting and/or have been hot rolled. According to various specific wants of the final product, the stainless steel shall pass once or twice through a rolling mill line. Additionally, the rolling mill line or parts of it also can be used for processes which are aimed at manufacturing strips with various specific features that are of significant importance for some applications. Since parts of the rolling mill line should be stopped in view of the specific requirements for the final product, the utilization rate of the rolling mill line is relatively low. - It is still desirable in the art to provide an improved method for continuously manufacturing cold-rolled steel.
- Therefore, the object of the present invention is to provide a method for continuously manufacturing cold-rolled steel to overcome the aforementioned shortcomings of the prior art.
- Accordingly, the method for continuously manufacturing cold-rolled steel of this invention includes the steps of:
- providing coils of white steel that are manufactured by hot rolling a cast steel followed by annealing and pickling the cast steel;
- subjecting the coils of white steel to uncoiling and welding in an uncoiling-welding installation where the coils of white steel are flattened in an uncoiling device and are welded in a welding device;
- passing the flattened and welded white steel through a set of tension rollers provided in a first strip accumulator;
- moving the white steel from the first strip accumulator to a cold rolling device for cold rolling the white steel to result in a cold-rolled steel with a predetermined thickness;
- moving the cold-rolled steel from the cold rolling device to a degreasing device for removing grease from the cold-rolled white steel;
- moving the cold-rolled steel from the degreasing device to a second strip accumulator having a set of tension rollers;
- moving the cold-rolled steel from the second strip accumulator to an annealing-pickling installation for annealing the cold-rolled steel and for electrolyzing and acid-washing the cold-rolled steel after annealing so as to remove scale from the cold-rolled steel;
- moving the cold-rolled steel from the annealing-pickling installation to a third strip accumulator having a set of tension rollers;
- moving the cold-rolled steel from the third strip accumulator to a temper rolling device for imposing gloss on the cold-rolled steel;
- moving the cold-rolled steel from the temper rolling device to a tension leveling device for leveling the cold-rolled steel;
- moving the cold-rolled steel from the tension leveling device to a fourth strip accumulator having a set of tension rollers; and
- moving the cold-rolled steel from the fourth strip accumulator to a trimming-recoiling installation for trimming and recoiling the cold-rolled steel.
- Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment with reference to the accompanying drawings, of which:
-
Figure 1 is a schematic diagram of a conventional process for manufacturing cold-rolled steel conducted using a multi-stage production line; -
Figure 2 is a schematic diagram of a preferred embodiment of a method for continuously manufacturing cold-rolled steel according to this invention; and -
Figure 3 is a bar chart demonstrating a production efficiency comparison of the preferred embodiment to the prior art ofFigure 1 . - Referring to
Figure 2 , the preferred embodiment of a method for continuously manufacturing cold-rolled steel according to this invention includes the steps of: - 1) providing coils of white steel:
-
Coils 100 ofwhite steel 400 are provided, which are manufactured by hot rolling a cast steel followed by annealing and pickling the cast steel.
-
- 2) uncoiling and welding:
- The white steel is subjected to uncoiling and welding in an uncoiling-
welding installation 21 where thecoils 100 ofwhite steel 400 are flattened in anuncoiling device 211 and are welded in awelding device 212. Theuncoiling device 211 includes two overhang-mandrel type of uncoilers. Thewelding device 212 includes a first arc welder for welding a steel strip having a thickness more than 1.5 mm, preferably 1.5-6 mm, and a second arc welder for welding a steel strip having a thickness less than 1.5 mm.
- The white steel is subjected to uncoiling and welding in an uncoiling-
- 3) passing through a first strip accumulator:
- The flattened and welded
white steel 400 is passed through a set oftension rollers 221 provided in afirst strip accumulator 22.
- The flattened and welded
- 4) cold rolling:
- The
white steel 400 is moved from thefirst strip accumulator 22 to a coldrolling device 23 for cold rolling thewhite steel 400 to result in a cold-rolled steel with a predetermined thickness. The cold rollingdevice 23 includes threecold rolling mills 231 arranged in series. Thewhite steel 400 is cold rolled in a rolling ratio ranging from 50 to 70% and to a thickness of about 0.3 mm. The thickness of thewhite steel 400 as it enters the cold rollingdevice 23 is measured. The thickness and the shape of thewhite steel 400 as it exits the cold rollingdevice 23 are also measured and transmitted to an automatic gauge control and a shape control system so as to monitor the conditions of the cold rollingdevice 23 and the properties of thewhite steel 400 after cold rolling.
- The
- 5) degreasing:
- The cold-rolled steel from the cold rolling
device 23 is moved to adegreasing device 24 for removing grease from the cold-rolled white steel. Thedegreasing device 24 includes a basesolution spraying region 241 for spraying a base solution on the cold-rolled steel, a water-washing region 242 for washing the cold-rolled steel using water, and a dryingregion 243 for drying the cold-rolled steel after washing.
- The cold-rolled steel from the cold rolling
- 6) moving the cold-rolled steel to a second strip accumulator:
- The cold-rolled steel is moved from the
degreasing device 24 to asecond strip accumulator 25. Thesecond strip accumulator 25 is similar to thefirst strip accumulator 22 in structure, and has a set oftension rollers 251.
- The cold-rolled steel is moved from the
- 7) annealing and pickling:
- The cold-rolled steel is moved from the
second strip accumulator 25 to an annealing-pickling installation 26 for annealing the cold-rolled steel and for electrolyzing and acid-washing the cold-rolled steel after annealing so as to remove scale from the cold-rolled steel. The annealing-pickling installation 26 includes anannealing device 261 and apickling device 262. Theannealing device 261 includes aheating region 263 operating at a temperature ranging from 1000 °C to 1200 °C, a preheatingregion 264 which is disposed upstream of theheating region 263 and in which the cold-rolled steel is preheated by radiation heat generated by theheating region 263, and acooling region 265 which is disposed downstream of theheating region 263 and in which the cold-rolled steel is cooled to a temperature not higher than 80 °C. Thepickling device 262 includes anelectrolyzing tank 266 containing a sodium sulfate solution for removing iron oxide scale from the cold-rolled steel, an acid-washing tank 267 containing nitric acid and hydrofluoric acid for removing Fe-Cr-Ni oxide scale from the cold-rolled steel, and a water-washing region 268 for washing the cold-rolled steel. The water-washing region 268 is conducted in five stages so as to ensure that the acid solutions are washed out of the cold-rolled steel completely.
- The cold-rolled steel is moved from the
- 8) moving the cold-rolled steel to a third strip accumulator:
- The cold-rolled steel is moved from the annealing-
pickling installation 26 to a third strip accumulator27. Thethird strip accumulator 27 is similar to thefirst strip accumulator 22 in structure, and has a set oftension rollers 271.
- The cold-rolled steel is moved from the annealing-
- 9) temper rolling:
- The cold-rolled steel is moved from the
third strip accumulator 27 to atemper rolling device 28 for imposing gloss on the cold-rolled steel. Thetemper rolling device 28 includes a set of work rolls 281 for imposing the gloss on the cold-rolled steel via transfer printing.
- The cold-rolled steel is moved from the
- 10) tension leveling:
- The cold-rolled steel is moved from the
temper rolling device 28 to atension leveling device 29 for leveling the cold-rolled steel. Thetension leveling device 29 includes aleveling unit 291 for leveling the cold-rolled steel, and a washing-dryingdevice 292 for washing and drying the cold-rolled steel after leveling. The levelingunit 291 includes a set of bending rolls 293 and a set of reverse-bending rolls 294. Additionally, the cold-rolled steel is sprayed with water or lubricant by the washing-dryingdevice 292 before it enters into theleveling unit 291.
- The cold-rolled steel is moved from the
- 11) moving the cold-rolled steel to a fourth strip accumulator:
- The cold-rolled steel is moved from the
tension leveling device 29 to afourth strip accumulator 31. Thefourth strip accumulator 31 is similar to thefirst strip accumulator 22 in structure, and has a set oftension rollers 311. - It should be noted that each of the first, second, third, and
fourth strip accumulators
- The cold-rolled steel is moved from the
- 12) moving the cold-rolled steel to a trimming-recoiling installation:
- The cold-rolled steel is moved from the fourth strip accumulator 31to a trimming-recoiling
installation 32, which includes atrimming device 321 for trimming the cold-rolled steel, and arecoiling device 322 for recoiling the cold-rolled steel to obtain a cold-rolled steel product 300 (i.e., 2B steel coil). - Additionally, when 2D steel coil is intended to be produced, it can be obtained merely by shutting down the
temper rolling device 28. Therefore, the utilization rate of the production line to perform the method of the present invention can be improved over the prior art. - Referring to
Figure 3 , a comparison of the cold-rolled steel product made by the method of the present invention to the cold-rolled steel product made by the conventional multi-stage process shown inFigure 1 is made in terms of equipment cost, personnel cost, operating rate, throughput, productivity, and overall production cost. As shown inFigure 3 , the personnel cost, the throughput, and the productivity of the method of the present invention are improved over those of the conventional multi-stage process even though the equipment cost of the method of the present invention is relatively high and the operating rate of the method of the present invention is relatively low. Totally, the overall production cost of the method of the present invention is merely 78% of that of the conventional multi-state process.
- The cold-rolled steel is moved from the fourth strip accumulator 31to a trimming-recoiling
Claims (8)
- A method for continuously manufacturing cold-rolled steel, characterized by the steps of:providing coils (100) of white steel (400) that are manufactured by hot rolling a cast steel followed by annealing and pickling the cast steel;subjecting the coils (100) of white steel (400) to uncoiling and welding in an uncoiling-welding installation (21) where the coils (100) of the white steel (400) are flattened in an uncoiling device (211) and are welded in a welding device (212);passing the flattened and welded white steel (400) through a set of tension rollers (221) provided in a first strip accumulator (22);moving the white steel (400) from the first strip accumulator (22) to a cold rolling device (23) for cold rolling the white steel (400) to result in a cold-rolled steel with a predetermined thickness;moving the cold-rolled steel from the cold rolling device (23) to a degreasing device (24) for removing grease from the cold-rolled white steel;moving the cold-rolled steel from the degreasing device (24) to a second strip accumulator (25) having a set of tension rollers (251);moving the cold-rolled steel from the second strip accumulator (25) to an annealing-pickling installation (26) for annealing the cold-rolled steel and for electrolyzing and acid-washing the cold-rolled steel after annealing so as to remove scale from the cold-rolled steel;moving the cold-rolled steel from the annealing-pickling installation (26) to a third strip accumulator (27) having a set of tension rollers (271) ;moving the cold-rolled steel from the third strip accumulator (27) to a temper rolling device (28) for imposing gloss on the cold-rolled steel;moving the cold-rolled steel from the temper rolling device (28) to a tension leveling device (29) for leveling the cold-rolled steel;moving the cold-rolled steel from the tension leveling device (29) to a fourth strip accumulator (31) having a set of tension rollers (311); andmoving the cold-rolled steel from the fourth strip accumulator (31)to a trimming-recoiling installation (32) for trimming and recoiling the cold-rolled steel.
- The method as claimed in Claim 1, characterized in that the white steel (400) is cold rolled in a rolling ratio ranging from 50 to 70% and to a thickness of about 0.3 mm.
- The method as claimed in Claim 1, characterized in that the degreasing device (24) includes a base solution spraying region (241) for spraying a base solution on the cold-rolled steel, a water-washing region (242) for washing the cold-rolled steel using water, and a drying region (243) for drying the cold-rolled steel after washing.
- The method as claimed in Claim 1, characterized in that the annealing-pickling installation (26) includes an annealing device (261) having a heating region (263) operating at a temperature ranging from 1000 °C to 1200 °C, a preheating region (264) which is disposed upstream of the heating region (263) and in which the cold-rolled steel is preheated by radiation heat generated by the heating region (263), and a cooling region (265) which is disposed downstream of the heating region (263) and in which the cold-rolled steel is cooled to a temperature not higher than 80 °C.
- The method as claimed in Claim 1, characterized in that the uncoiling device (211) includes two overhang-mandrel type of uncoilers.
- The method as claimed in Claim 1, characterized in that the welding device (212) includes a first arc welder for welding a steel strip having a thickness more than 1. 5 mm, and a second arc welder for welding a steel strip having a thickness less than 1.5 mm.
- The method as claimed in Claim 1, characterized in that the annealing-pickling installation (26) includes a pickling device (262) having an electrolyzing tank (266) containing a sodium sulfate solution for removing iron oxide scale from the cold-rolled steel, an acid-washing tank (267) containing nitric acid and hydrofluoric acid for removing Fe-Cr-Ni oxide scale from the cold-rolled steel, and a water-washing region (268) for washing the cold-rolled steel.
- The method as claimed in Claim 1, characterized in that the tension leveling device (29) includes a washing-drying device (292) for washing and drying the cold-rolled steel after leveling.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES07254712T ES2384734T3 (en) | 2007-12-05 | 2007-12-05 | Method for continuously manufacturing cold rolled steel |
SI200730946T SI2067541T1 (en) | 2007-12-05 | 2007-12-05 | Method for continuously manufacturing cold-rolled steel |
EP07254712A EP2067541B1 (en) | 2007-12-05 | 2007-12-05 | Method for continuously manufacturing cold-rolled steel |
AT07254712T ATE551131T1 (en) | 2007-12-05 | 2007-12-05 | METHOD FOR CONTINUOUS PRODUCTION OF COLD ROLLED STEEL |
PL07254712T PL2067541T3 (en) | 2007-12-05 | 2007-12-05 | Method for continuously manufacturing cold-rolled steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07254712A EP2067541B1 (en) | 2007-12-05 | 2007-12-05 | Method for continuously manufacturing cold-rolled steel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2067541A1 true EP2067541A1 (en) | 2009-06-10 |
EP2067541B1 EP2067541B1 (en) | 2012-03-28 |
Family
ID=39111880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07254712A Revoked EP2067541B1 (en) | 2007-12-05 | 2007-12-05 | Method for continuously manufacturing cold-rolled steel |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2067541B1 (en) |
AT (1) | ATE551131T1 (en) |
ES (1) | ES2384734T3 (en) |
PL (1) | PL2067541T3 (en) |
SI (1) | SI2067541T1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2769779A1 (en) * | 2013-02-22 | 2014-08-27 | Siemens VAI Metals Technologies GmbH | Facility and method for rolling a metal strip |
CN106271665A (en) * | 2015-05-28 | 2017-01-04 | 佛山市吉力佳机械有限公司 | A kind of rustless steel coiled material Compositions of metal-working machines |
CN106799596A (en) * | 2017-02-17 | 2017-06-06 | 佛山市欧艺钢金属制品有限公司 | A kind of coiled material production equipment |
CN106881352A (en) * | 2017-03-22 | 2017-06-23 | 山东宏旺实业有限公司 | A kind of Band by Hot-rolling technique and its production equipment |
CN110306016A (en) * | 2019-07-31 | 2019-10-08 | 首钢京唐钢铁联合有限责任公司 | Method and device for producing ultrathin strip steel by hood-type annealing |
JP2022518735A (en) * | 2019-01-28 | 2022-03-16 | オウトクンプ オサケイティオ ユルキネン | Methods for manufacturing stainless steel strips |
CN114433624A (en) * | 2022-01-21 | 2022-05-06 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Frosted surface stainless steel cold rolling production method |
CN115090692A (en) * | 2022-06-27 | 2022-09-23 | 江苏沙钢集团有限公司 | Method for controlling single-side waves of cold-rolled annealed plate |
CN116673335A (en) * | 2023-05-24 | 2023-09-01 | 邢台金逸金属制品有限公司 | Cold-rolled coiled sheet production molding system |
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2007
- 2007-12-05 PL PL07254712T patent/PL2067541T3/en unknown
- 2007-12-05 ES ES07254712T patent/ES2384734T3/en active Active
- 2007-12-05 EP EP07254712A patent/EP2067541B1/en not_active Revoked
- 2007-12-05 AT AT07254712T patent/ATE551131T1/en active
- 2007-12-05 SI SI200730946T patent/SI2067541T1/en unknown
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US5820704A (en) * | 1995-10-19 | 1998-10-13 | Usinor Sacilor | Process for the continuous production of a rolled stainless steel sheet strip and continuous production line for carrying out the process |
US6478899B1 (en) | 1998-02-25 | 2002-11-12 | Ugine S.A. | Installation for making cold rolled stainless steel bands |
DE19843382A1 (en) * | 1998-09-22 | 2000-03-23 | Schloemann Siemag Ag | Continuous mill train for rolling steel strips has uncoiling device and a welding device |
US6546771B1 (en) | 1998-12-18 | 2003-04-15 | Avestapolarit Ab | Method for manufacturing of strips and rolling mill line |
DE10209406A1 (en) * | 2001-09-21 | 2003-04-24 | Hitachi Ltd | Continuous pickling and cold rolling plant and method for operating the same |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2769779A1 (en) * | 2013-02-22 | 2014-08-27 | Siemens VAI Metals Technologies GmbH | Facility and method for rolling a metal strip |
WO2014127864A1 (en) * | 2013-02-22 | 2014-08-28 | Siemens Vai Metals Technologies Gmbh | Installation and method for rolling a metal strip |
US9573174B2 (en) | 2013-02-22 | 2017-02-21 | Primetals Technologies Austria GmbH | Installation and method for rolling a metal strip |
CN106271665A (en) * | 2015-05-28 | 2017-01-04 | 佛山市吉力佳机械有限公司 | A kind of rustless steel coiled material Compositions of metal-working machines |
CN106799596B (en) * | 2017-02-17 | 2019-03-05 | 佛山市欧艺钢数控设备有限公司 | A kind of coiled material production equipment |
CN106799596A (en) * | 2017-02-17 | 2017-06-06 | 佛山市欧艺钢金属制品有限公司 | A kind of coiled material production equipment |
CN106881352A (en) * | 2017-03-22 | 2017-06-23 | 山东宏旺实业有限公司 | A kind of Band by Hot-rolling technique and its production equipment |
JP2022518735A (en) * | 2019-01-28 | 2022-03-16 | オウトクンプ オサケイティオ ユルキネン | Methods for manufacturing stainless steel strips |
CN110306016A (en) * | 2019-07-31 | 2019-10-08 | 首钢京唐钢铁联合有限责任公司 | Method and device for producing ultrathin strip steel by hood-type annealing |
CN110306016B (en) * | 2019-07-31 | 2021-07-09 | 首钢京唐钢铁联合有限责任公司 | Method and device for producing ultrathin strip steel by hood-type annealing |
CN114433624A (en) * | 2022-01-21 | 2022-05-06 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Frosted surface stainless steel cold rolling production method |
CN115090692A (en) * | 2022-06-27 | 2022-09-23 | 江苏沙钢集团有限公司 | Method for controlling single-side waves of cold-rolled annealed plate |
CN116673335A (en) * | 2023-05-24 | 2023-09-01 | 邢台金逸金属制品有限公司 | Cold-rolled coiled sheet production molding system |
CN116673335B (en) * | 2023-05-24 | 2023-11-21 | 邢台金逸金属制品有限公司 | Cold-rolled coiled sheet production molding system |
Also Published As
Publication number | Publication date |
---|---|
ES2384734T3 (en) | 2012-07-11 |
SI2067541T1 (en) | 2012-09-28 |
ATE551131T1 (en) | 2012-04-15 |
PL2067541T3 (en) | 2012-08-31 |
EP2067541B1 (en) | 2012-03-28 |
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