EP3927478A1 - VERFAHREN ZUR EINSTELLUNG VERSCHIEDENER KÜHLVERLÄUFE VON WALZGUT ÜBER DER BANDBREITE EINER KÜHLSTRECKE IN EINER WARMBAND- ODER GROBBLECH-STRAßE - Google Patents
VERFAHREN ZUR EINSTELLUNG VERSCHIEDENER KÜHLVERLÄUFE VON WALZGUT ÜBER DER BANDBREITE EINER KÜHLSTRECKE IN EINER WARMBAND- ODER GROBBLECH-STRAßEInfo
- Publication number
- EP3927478A1 EP3927478A1 EP20706685.3A EP20706685A EP3927478A1 EP 3927478 A1 EP3927478 A1 EP 3927478A1 EP 20706685 A EP20706685 A EP 20706685A EP 3927478 A1 EP3927478 A1 EP 3927478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- width
- rolling stock
- strip
- over
- 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
Classifications
-
- 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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
-
- 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
-
- 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
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
- C21D2221/00—Treating localised areas of an article
Definitions
- the invention relates to a method for adjusting the cooling course of metal strips or metal sheets (rolling stock) over the strip width of a cooling section, e.g. in a hot strip or heavy plate mill or cooling in a continuous annealing / heat treatment.
- Cooling plays an important role in improving the quality of hot strip or heavy plate.
- a targeted computer-aided control of the cooling is known in order, for example, to avoid edging and / or bulging of the strips or sheets. If there is insufficient control and regulation of the temperature, the desired qualities can no longer be set. So it happens that if the edges or bulges of the strips or sheets are too strong, they cannot be corrected to ensure quality in a subsequent roller conveyor. The consequences are belt errors and the associated increased rejects.
- a control device for the rolling stock determines and sets the optimal coolant quantity and coolant quantity curve for passage through a cooling section. This is to ensure the optimal flatness and evenness of the rolling stock to be cooled.
- a disadvantage here is that the strip width areas are specifically cooled differently in order to improve the flatness of the strip or sheet. This is done taking into account measured temperatures, which are taken from the surface. After cooling, the Temperature distribution in the strip or sheet is just not homogeneous and therefore not meaningful with regard to the actual energy content in the material.
- the energy content of the rolling stock to be cooled is taken into account as an input variable for controlling the cooling section and for determining the amount of coolant in order to dissipate a specific amount of heat from the rolling stock in a targeted manner.
- a single, fixed value is always assumed here as the start and target value. Furthermore, there is no indication of how the target size can be determined.
- the object of the present invention is to provide an improved method for checking and adjusting the flatness or flatness and / or the mechanical properties of the rolling stock in a hot strip and heavy plate mill. Further advantageous measures are the subject of subclaims.
- this object is achieved by determining the initial enthalpy distribution over the material width of the rolling stock before cooling for the calculation of the cooling, with a target enthalpy distribution taking into account a calculation of the flatness and the mechanical Properties is determined by a microstructure model in the width and length direction of the rolling stock and then the amount of coolant and the coolant path of the cooling section is set.
- a target enthalpy distribution over the width after the cooling section is determined.
- the input enthalpy distribution can e.g. can be determined from a computer program. In principle, a different thermodynamic potential can also be used instead of the enthalpy.
- the target enthalpy distribution can be determined using various parameters. This is, for example, a numerical calculation of the flatness of the strip after the cooling section, which can be optimized based on the target value. With the help of modeling it is basically possible, too calculate the evenness of the finished product when cold (i.e. after the coil has cooled down). This is not possible with the aid of a measuring device in a warm state. Another possibility is to determine this using a microstructure model so that the goal of setting homogeneous mechanical properties across the width can be met. This is not necessarily the case with uniform cooling and this is also not necessarily the case with uniform enthalpy distribution across the width. Furthermore, the results of various measuring devices that measure a quality variable as a function of the width can also be used as control parameters. This can, for example, be a flatness measuring roller or another flatness measuring device, but also measuring devices for recording the mechanical properties (e.g. Impoc or others).
- a wide variety of measures can be used as actuators within the cooling section, which allow different enthalpies to be achieved depending on the width. This can be, for example, edge masking, heating of edges, targeted cooling through several control loops across the width or the like.
- the target enthalpy distribution can also be determined by optimizing other parameters or also empirically based on measurements after cooling. Starting from the initial enthalpy distribution, the target enthalpy distribution can be set inhomogeneously over the width. A control can dynamically change the target enthalpy distribution in the rolling stock across the width while the rolling stock is running through the cooling section. The enthalpy calculation can be based on the Gibbs energy, for example.
- databases in the SGTE can be used, for example, to specify the structural components in the rolling stock and to set the cooling to a constant structural phase proportion that is homogeneously distributed over the bandwidth of the rolling stock and to regulate and control the mechanical properties depending on the target enthalpy distribution.
- An immediate comparison with the mechanical properties calculated in the microstructure model can be made via a measuring point located after the cooling, and a possible deviation in the target enthalpy distribution can be corrected directly by activating or switching off the cooling.
- Fig. 1 is a schematic representation of the
- Fig. 3 shows the representation of possible
- FIG. 1 shows schematically part of a possible hot strip or heavy plate plant for processing metal strips and / or metal sheets.
- a measuring device 2 is arranged after the last stand 1 of the hot strip or heavy plate plant.
- the measuring device 2 can have a flatness roller or the like. and is arranged in front of the actual cooling section 3.
- the measuring device records an actual value of the rolling stock 6 upstream of the cooling section 3.
- the cooling section 3 can include laminar cooling or increased cooling or also compact cooling. After the cooling section 3 there is at least one further measuring device, for example a flatness roller or the like. arranged that the actual value, for example, the flatness of the cooling section 3
- Hot strip / rolled material 6 after passing through the cooling section 3 measures.
- a computing model 5 receives the measurement data from the measuring devices 2 and 4 and specifies the cooling medium quantities to be used in the cooling section 3 in order to set the target enthalpy distribution. In this way, it can be ensured online, as it were, that the desired qualities of the rolled material / hot strip 6 can be adjusted and can be reeled into a coil 7 immediately afterwards for further processing. Further units, for example more measuring devices, descalers, thermal insulation hoods, scissors, etc., can be arranged in the area before and after cooling 3.
- FIGS. 2, 2a, 2b illustrate the enthalpy distribution in the hot strip viewed across the width at the beginning of the acquisition and at the end of the acquisition as well as the difference between the two enthalpies at the beginning and the end.
- FIG. 3 illustrates the mechanical properties of the yield point and tensile strength (Rp and Rm) over the width of the hot strip.
- FIG. 3a illustrates the flatness of the rolling stock viewed across the width.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019104419.7A DE102019104419A1 (de) | 2019-02-21 | 2019-02-21 | Verfahren zur Einstellung verschiedener Kühlverläufe von Walzgut über der Bandbreite einer Kühlstrecke in einer Warmband- oder Grobblech-Straße |
| PCT/EP2020/054366 WO2020169669A1 (de) | 2019-02-21 | 2020-02-19 | VERFAHREN ZUR EINSTELLUNG VERSCHIEDENER KÜHLVERLÄUFE VON WALZGUT ÜBER DER BANDBREITE EINER KÜHLSTRECKE IN EINER WARMBAND- ODER GROBBLECH-STRAßE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3927478A1 true EP3927478A1 (de) | 2021-12-29 |
| EP3927478B1 EP3927478B1 (de) | 2023-04-05 |
Family
ID=69650598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20706685.3A Active EP3927478B1 (de) | 2019-02-21 | 2020-02-19 | Verfahren zur einstellung verschiedener kühlverläufe von walzgut über dessen breite in einer kühlstrecke einer warmband- oder grobblech-strasse |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US11779977B2 (de) |
| EP (1) | EP3927478B1 (de) |
| JP (1) | JP7239720B2 (de) |
| CN (1) | CN113453814B (de) |
| DE (1) | DE102019104419A1 (de) |
| ES (1) | ES2948332T3 (de) |
| FI (1) | FI3927478T3 (de) |
| WO (1) | WO2020169669A1 (de) |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8326652D0 (en) * | 1983-10-05 | 1983-11-09 | Davy Mckee Sheffield | Rolling mill |
| JPS6462208A (en) * | 1987-09-02 | 1989-03-08 | Kawasaki Steel Co | Control method for cooling hot rolled strip |
| DE19963186B4 (de) | 1999-12-27 | 2005-04-14 | Siemens Ag | Verfahren zur Steuerung und/oder Regelung der Kühlstrecke einer Warmbandstrasse zum Walzen von Metallband und zugehörige Vorrichtung |
| DE10129565C5 (de) | 2001-06-20 | 2007-12-27 | Siemens Ag | Kühlverfahren für ein warmgewalztes Walzgut und hiermit korrespondierendes Kühlstreckenmodell |
| US7251971B2 (en) | 2003-02-25 | 2007-08-07 | Siemens Aktiengesellschaft | Method for regulating the temperature of strip metal |
| DE102008011303B4 (de) | 2008-02-27 | 2013-06-06 | Siemens Aktiengesellschaft | Betriebsverfahren für eine Kühlstrecke zum Kühlen eines Walzguts mit von der Temperatur losgelöster Kühlung auf einen Endenthalpiewert |
| CN101633004B (zh) * | 2008-07-24 | 2011-01-19 | 宝山钢铁股份有限公司 | 厚板轧后控制冷却广义观测器设计方法 |
| CN101518788A (zh) * | 2009-03-23 | 2009-09-02 | 天津东大津奉轧制技术有限责任公司 | 一种用于热轧带钢生产线的冷却设备 |
| EP2287345A1 (de) | 2009-07-23 | 2011-02-23 | Siemens Aktiengesellschaft | Verfahren zur Steuerung und/oder Regelung eines Induktionsofens für eine Walzanlage, Steuer- und/oder Regeleinrichtung für eine Walzanlage und Walzanlage zum Herstellen von Walzgut |
| CN101670372B (zh) * | 2009-09-25 | 2011-01-26 | 首钢总公司 | 一种消除热轧高强钢板形缺陷的方法 |
| CN105073291B (zh) | 2013-03-11 | 2018-02-06 | 诺维尔里斯公司 | 改进辊轧带的平坦度 |
| EP2898963A1 (de) * | 2014-01-28 | 2015-07-29 | Siemens Aktiengesellschaft | Kühlstrecke mit zweifacher Kühlung auf eine jeweilige Sollgröße |
| CN103878186B (zh) * | 2014-03-24 | 2015-05-06 | 华中科技大学 | 一种确定热轧带钢层流冷却温度的方法 |
| JP6295932B2 (ja) | 2014-12-03 | 2018-03-20 | Jfeスチール株式会社 | 金属帯の形状制御方法及び形状制御装置 |
| US20170327925A1 (en) * | 2016-05-11 | 2017-11-16 | Nucor Corporation | Cross-strip temperature variation control |
| EP3599037A1 (de) * | 2018-07-25 | 2020-01-29 | Primetals Technologies Germany GmbH | Kühlstrecke mit einstellung der kühlmittelströme durch pumpen |
-
2019
- 2019-02-21 DE DE102019104419.7A patent/DE102019104419A1/de not_active Withdrawn
-
2020
- 2020-02-19 ES ES20706685T patent/ES2948332T3/es active Active
- 2020-02-19 JP JP2021546743A patent/JP7239720B2/ja active Active
- 2020-02-19 EP EP20706685.3A patent/EP3927478B1/de active Active
- 2020-02-19 WO PCT/EP2020/054366 patent/WO2020169669A1/de not_active Ceased
- 2020-02-19 US US17/310,730 patent/US11779977B2/en active Active
- 2020-02-19 FI FIEP20706685.3T patent/FI3927478T3/fi active
- 2020-02-19 CN CN202080015208.4A patent/CN113453814B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020169669A1 (de) | 2020-08-27 |
| ES2948332T3 (es) | 2023-09-08 |
| US11779977B2 (en) | 2023-10-10 |
| JP2022520074A (ja) | 2022-03-28 |
| FI3927478T3 (fi) | 2023-05-29 |
| US20220126343A1 (en) | 2022-04-28 |
| CN113453814B (zh) | 2023-09-01 |
| DE102019104419A1 (de) | 2020-08-27 |
| JP7239720B2 (ja) | 2023-03-14 |
| CN113453814A (zh) | 2021-09-28 |
| EP3927478B1 (de) | 2023-04-05 |
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