EP3096896B1 - Method for optimally producing metal steel and iron alloys in hot-rolled and thick plate factories using a microstructure simulator, monitor, and/or model - Google Patents
Method for optimally producing metal steel and iron alloys in hot-rolled and thick plate factories using a microstructure simulator, monitor, and/or model Download PDFInfo
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- EP3096896B1 EP3096896B1 EP15701113.1A EP15701113A EP3096896B1 EP 3096896 B1 EP3096896 B1 EP 3096896B1 EP 15701113 A EP15701113 A EP 15701113A EP 3096896 B1 EP3096896 B1 EP 3096896B1
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- mechanical strength
- program
- strength property
- cooling
- metallurgical
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- 238000005555 metalworking Methods 0.000 description 5
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Images
Classifications
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- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- 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
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- 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
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
- B21B2001/225—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 by 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
Definitions
- the invention is directed to a method for controlling a metallurgical production plant for producing a product from a metallic steel and / or iron alloy, wherein the manufacturing process is controlled at least partially by means of a microstructure simulator and / or microstructure and / or structural model, which / at least one a mechanical strength property of the produced, the metallic steel and / or iron containing product containing program comprises, by means of which the at least one mechanical strength property depending on a respective process chain based on calculated metallurgical phase components and / or their respective shares in the adjusting metallurgical microstructure the process chain of the metallurgical production plant includes a hot rolling and / or plate rolling mill with a final cooling section and in the calculation of the at least one mechanical strength property operating parameters of the metallurgical production plant, on which the obtained at least one mechanical strength property depends, with at least partially set in advance, customizable initial values.
- the reel or cooling stop temperature as well as the cooling rate are specified as the mechanical strength properties of the product obtained can be adjusted to a large extent. Changes in these parameters are therefore inevitably also noticeable in changes in the mechanical strength properties, but only later on the basis of tensile tests on tensile specimens taken from the product produced can be determined. Setting the respective desired mechanical strength properties to the desired extent is one of the essential goals of a rolling process, since these properties substantially determine the price that can be achieved for the product produced on the market.
- the predetermined setting of process or process parameters of a metal working line in the rolling mill and the subsequent cooling section thus does not necessarily lead to compliance with target values of the desired mechanical (strength) properties. Moreover, these can not be measured directly and directly, so that an immediate correction of the process or process parameters or operating parameters of the metallurgical plant is not possible.
- the proportion of at least one metallurgical phase of the metal taking account of the phase state influencing operating parameters of the metalworking line and / or state parameters of the metal, based on a model that includes a model for determining the phase state continuously, based on a specific point of the metalworking line , Determined and the proportion of at least one phase, relative to a specific point of the metalworking line, is displayed to an operator. For example, the proportions of ferrite, austenite, perlite and cementite are displayed.
- the WO 2005/099923 A1 discloses in the manufacture of steel the use of a conversion model for the cooling section of a rolling train, with which conversion model, in addition to the temperature of the steel, also its metallurgical phase fractions along the steel strip are calculated in real time.
- a control system is described which keeps constant the phase components of the steel strip wound on a reel device. This will be done in The following steps are taken: In a first step, data is used to determine the degree of conversion and thus a specific phase proportion. In a second step, one or more parameters of the cooling strategy (manipulated variables) are adapted online as part of the cooling line of the rolling train so that the desired phase content of the cooled steel is kept constant at the reel device.
- the aim is to comply as precisely as possible with the required properties or material properties of the metal produced.
- Steel materials are added to alloying elements in order to obtain optimal mechanical strength properties of a product produced therefrom under the given process and process conditions.
- the amount of alloying elements to be added to the respective steel material depends above all on the mechanical strength properties desired in the respective application. Alloying elements are very expensive, which is why it is attempted to reduce or optimize the costs of the alloy. Since in each case concrete predictions about the result to be achieved by adding alloying elements with respect to the mechanical strength values of the respective steel product are not possible, it must be determined by experimental experiments which amount of a respective alloying element has an effect on the mechanical properties or mechanical properties Strength properties of a particular steel product exercises.
- a method for monitoring and controlling the quality of rolled products from hot rolling processes is known in which production conditions such as temperatures, punctures, etc. are recorded online throughout the rolling process and from there by means of interconnected and the entire rolling process descriptive physical / metallurgical and / or statistical models expected mechanical / technological material properties, in particular the yield strength, the tensile strength and the elongation at break, of the rolled product are calculated in advance.
- the expected material properties can be predicted with this method.
- its chemical analysis is identified for each semi-finished material and fed to a physical / metallurgical Austenitmaschines- and excretion model.
- the process known from this document optimizes the desired chemical analysis of the primary material and the production conditions using austenitizing, deformation, recrystallization, transformation, precipitation, cooling and material physical / metallurgical models and determines these for new related product qualities .
- the carbon content or the manganese content of the material used in the calculation of a strength property is taken into account, so that from this model already the influence of alloying elements on a mechanical strength property of the product obtained is apparent.
- the preamble of claim 1 is based on WO 98/18970
- the invention has for its object to provide a solution which is advantageous over the previous procedure setting of operating parameters to achieve the desired mechanical strength properties of a metallic steel and / or iron alloy product and the desired metallurgical phase components in the product in its manufacture in a rolling mill.
- this object is achieved in that as detailed in the calculation of at least one strength property operating parameters of the metallurgical production plant, the respective mass fraction of at least one alloying element, preferably all alloying elements, the / in the chemical composition of the metallic Steel and / or iron alloy is / are present, and at least one other operating parameters, in particular a in the manufacture of the product acting on this cooling rate, preferably a setting in the context of a cooling process after a cooling cooling rate, are detected and a by a change at least this further operating parameter, in particular an increase in the cooling rate, achievable or achieved increase in the considered strength property by reducing the mass fraction of one or more rer of the alloying elements is at least partially compensated and / or compensated for the chemical composition of the metallic steel and / or iron alloy used.
- alloying agent (s) in such a way that only the proportions by mass of alloying agent (s) required in the achievable cooling rates or in another of the further operating parameters in each case at least to achieve the considered strength property chemical composition of the respective steel and / or iron alloy are present.
- the considered too The resulting strength property of the product produced is thus determined, determined and regulated, for example, by the possible or set cooling rate, whereas the chemical composition is adjusted as a function thereof.
- the influence and the contribution of the respectively present alloying elements to the mechanical strength properties of the product produced are taken into account in the calculation of the mechanical strength properties or the at least one mechanical strength property due to the solid solution precipitation hardening caused or influenced by them.
- the influence of the alloying elements on the mechanical strength properties can be determined precisely. If, for example, some manganese is added, this change is determined immediately with the program stored in the microstructure simulator and / or microstructure model and / or microstructure model so that the influence of this change on the mechanical strength properties or at least a mechanical strength property of the product produced can be determined.
- An operator can use this knowledge to modernize the cooling section of a rolling mill to increase, for example, the cooling rate.
- This higher cooling rate has an influence on the mechanical strength properties and can be used selectively to change the mechanical strength properties.
- the microstructure simulator and / or microstructure monitor and / or the microstructure model with the program stored therein provides the necessary information.
- the program takes into account the higher cooling rate and determines the resulting change in the strength properties.
- other mechanical strength properties result or the same mechanical strength properties can be achieved with fewer alloying elements, ie a smaller one Achieve mass fraction or weight fraction (weight percent) of alloying elements, so that costs are saved.
- microstructure simulator and / or microstructure model and / or microstructure model which adjusts the at least one mechanical strength property of the product produced as a function of the respective process chain of a rolling mill on the basis of calculated metallurgical phase constituents and / or their respective proportions metallurgical microstructure of the product produced can be quantified.
- the stored program determines the necessary changes in the process or operating parameters and accordingly calculates the mechanical strength properties resulting from that change.
- the microstructure simulator and / or microstructure monitor and / or structural model and the program stored therein the operator has a new tool available for material development through optimal adjustment of the process, process and / or operating parameters of the process chain comprising the rolling mill with cooling section Perform plant and obtain a desired mechanical strength property of the material.
- the invention provides that the respective detected mass fraction of alloying elements (n) and / or the respectively detected at least one further operating parameter, in particular the respectively detected cooling rate, is / are evaluated with a countable number of a rating unit depicting a valuation unit.
- the invention also provides in a further embodiment that the respective summation values of the countable valuation units, the arise, be determined and / or represented for each considered strength property in different combinations of a weighted at a number of countable valuation units mass fraction of alloying agent (s) and a counted with a number of countable valuation units further operating parameters, in particular a cooling rate.
- the program comprises a mathematical term and / or algorithm by means of which the respective number of evaluation units and / or the different sum values determined are compared with one another.
- the method according to the invention therefore also includes an evaluation of the influence of the alloy composition and the cooling rate with respect to the respective desired mechanical mechanical strength (s) to be achieved.
- the evaluation is carried out by means of a rating scale of mapping evaluation units, with which the alloy composition and the cooling rates are evaluated.
- the evaluation units may be of a technically quantitative nature, such as ⁇ increase in strength / ⁇ % by mass of the sum of alloying elements compared to ⁇ increase in strength / ⁇ cooling water quantity. But these valuation units can (additionally) costs, ie monetary values, are assigned, like this one Fig. 1 can be seen.
- the additional monetary costs (EUR 40.00 to EUR 215.00) required to change the yield strength to higher-strength steel grades (from S315MC to S650MC) are plotted there.
- different, different combinations of alloy compositions and cooling rates can be compared with each other on the basis of the respectively associated evaluation units.
- the sum values of countable valuation units formed in each case as comparison values can then be used to select a particular combination of an alloy composition and a cooling rate for the execution of the production process particularly favorable or suitable.
- a valuation unit that depicts a valuation scale can be, for example, a currency unit or a valuation unit assigned to the valuation unit. It is then possible to assign a cost value individually to the different cooling rates and to the different alloy compositions, but also summed up.
- the influence of alloying costs can be compared with the costs resulting from the costs for realizing a particular cooling rate for achieving the respectively desired mechanical strength property. It is thus possible with the method according to the invention to quantify the alloying costs for the adjustment of the specific desired mechanical property. Similarly, the cost of performing the necessary cooling rate to adjust the desired mechanical strength property is quantifiable. Since a higher cooling rate as well as the alloying elements of the steel or iron alloy greatly affect the mechanical properties of the obtained product, the cost of alloy change with respect to a change in mechanical strength properties can be accurately quantified by comparison with the method of the present invention. Thus, for example, after the conversion of an existing cooling section with a now higher, adjustable cooling rate, the values of the desired mechanical strength property can increase.
- This increase can be used to reduce individual alloying elements in the alloy composition of the steel and / or iron material used, thereby achieving cost savings for the overall process, which is due to the use of a reduced amount of one or more alloying elements.
- the method according to the invention such an estimation and evaluation is possible.
- the method according to the invention it is possible to determine the possible savings for each material by reducing the amount of alloying elements used. Materials with high alloy contents offer a high potential for savings, materials with fewer alloying parts a correspondingly lower potential.
- the method according to the invention or the program stored therein makes it possible to calculate the savings possibilities for the entire annual production of a considered metallurgical production plant, if the alloying costs for the respective considered material, ie the respective considered steel and / or iron alloy, are known.
- the invention is further characterized in that the program has the influence of mass fractions of alloying elements in the chemical composition of the metallic steel and / or iron alloy used includes the yield strength of the manufactured product mapping mathematical term and / or algorithm.
- C i are the proportions of the respective different alloying elements i in weight percent
- a i and B i respectively corresponding regression coefficients determined in advance by experimental tests
- YS is the yield strength whose change ( ⁇ ) is determined becomes.
- the regression coefficients are determined on the basis of test series in which the influence of carbon (C), silicon (Si), manganese (Mn), chromium (Cr), molybdenum (Mo), nickel (Ni), vanadium (V), nitrogen ( N), copper (Cu), aluminum (Al), niobium (Nb), titanium (Ti) and phosphorus (P) are taken into account as alloying elements of a steel and / or iron alloy, using the experimental measurement data for the determination of regression parameters present / templates or are known.
- the grain size ultimately resulting after the conversion in the product produced is deposited with the grain size in the microstructure simulator and / or microstructure model and / or microstructure model Program can also be determined, since the grain size according to the Hall-Petch relation of influence on the mechanical strength properties.
- the ferrite grain size has a decisive influence on the resulting mechanical strength properties since, according to the Hall-Petch relation, an increase ⁇ YS of the strength property "yield strength" with a decrease in grain size is to be expected.
- d is the ferrite grain size
- A is a regression parameter
- YS is the yield strength, the change ( ⁇ ) of which is determined.
- the invention furthermore provides that the program has a term in the form of the equation that reflects the influence of the cooling rate on the ferrite grain size (d a ) of the ferrite microstructure forming a final cooling of the product includes.
- d ⁇ the ferrite grain size
- a i the empirical coefficients
- C eq the carbon equivalent
- d ⁇ the austenite grain size
- ⁇ the residual strain hardening
- CR the cooling rate. It can be seen that a higher cooling rate leads to a smaller ferrite grain.
- the ferrite grain size is significantly influenced by the cooling rate or the cooling rate, which can be set in the - usually the rolling train and thus the rolling process of the product produced final - cooling line depending on the available cooling capacity.
- a model which comprises a microstructure simulator and / or microstructure monitor and / or a structural model which has at least one mechanical strength property of the generated metallic steel and / or iron alloy comprising calculating the at least one mechanical strength property as a function of the respective process chain of the metallurgical plant on the basis of calculated metallurgical phase constituents and / or their respective proportions on the adjusting metallurgical structure of the product produced.
- MPC Mechanism Calculator
- the model is suitable for control purposes in the trim water zone.
- control variables the yield strength or the tensile strength can be used after cooling.
- the model calculates the necessary process parameters. The results are immediately visible and updated with each new cyclic calculation.
- the core of the MPC program is the calculation of the mechanical strength properties of the produced material after cooling. The calculation is done by semi-empirical equations. The calculation is made for different volume elements of the strip or sheet. The tape or sheet is therefore divided into small elements.
- the process variables such as rolling speed and rolling temperature are taken into account. These are included in a change immediately in the new bill.
- the result is a distribution of mechanical (strength) properties in the strip or sheet.
- the basis of the calculation of the mechanical (strength) properties is the calculation of the phase components of the produced material. This is it It is necessary to calculate the precise cooling curve of the metal and to model the decay of the austenite into ferrite, perlite, bainite and martensite using this cooling curve, which itself is influenced by the metallurgical microstructure transformation. If this model is used for the calculation of mechanical (strength) properties, a comparison with measured values must take place in order to ensure a good prediction of the mechanical (strength) properties. Therefore, values calculated with the help of the model were compared with values obtained from tensile specimens and it was found that there was an excellent correlation between the calculated and the measured values with a small dispersion of the measured values. This correspondence results in different types of plant (hot strip mill, heavy plate mill and continuous casting plant, in particular CSP plant).
- the invention is therefore also characterized in a further development in that the operating parameters are optimized by means of the program at least with regard to the at least one mechanical strength property to be achieved.
- the strength properties of a product to be produced can be calculated with a given chemical composition. If the operating parameters such as the load distribution in the finishing train (rolling), the final rolling temperature, the cooling strategy or the coiler temperature changes, the resulting mechanical strength properties change.
- the program used in carrying out the method according to the invention carries out an optimization of the set operating parameters to be set and thus determines the best strength properties.
- effects of an improved system technology can be taken into account, for example an increased maximum rolling force or an increased maximum cooling rate or the like.
- These improved production conditions allow the achievement of improved (strength) properties of the material or reduced costs in its production. It is thus possible to operate a material development by optimally adjusting the process parameters in the rolling mill and in the cooling section with respect to the respective requirements.
- the operating parameters in individual processing steps of the process chain in the steel mill, rolling mill and the cooling section can be optimized with respect to the respective desired mechanical strength property with the program used in the inventive program by the fact that the individual structural changes in the individual processing steps determined and from a microstructure is determined iteratively with optimized properties.
- conventional processes can be optimized or the development and production of new materials can be accelerated. This can save considerable costs in material development.
- the invention further enables on-line visualization of the currently adjusting mechanical (strength) properties by providing in a further development that the respectively calculated at least one mechanical strength property is displayed online at a control station. This allows manual intervention based on information and status messages and leads to less production downtime.
- the target strength properties may also be used.
- This is done by an automatic correction of at least one or several process parameters in the rolling mill and in the cooling section.
- the invention is therefore also distinguished by the fact that operating parameters of the metallurgical plant are controlled by means of the calculated at least one mechanical strength property and the desired at least one mechanical strength property is automatically controlled. If predetermined desired operating parameters (for example, the intended final rolling temperature) are not met, for example because of a malfunction, the intended mechanical strength property (s) may no longer be achieved.
- the program carries out a calculation with the respectively currently measured values / data and changes the other operating parameters (eg the cooling strategy and the reel temperature) such that the desired desired mechanical strength properties (if possible) nevertheless be achieved.
- the mechanical strength property (s) is / are automatically controlled.
- a metallurgical plant for carrying out the method according to the invention comprises a hot rolling and / or plate mill, in which after a furnace forming in any number of stands takes place, which can also be divided into one or more roughing and one or more finishing stands, and wherein the formed material is then cooled in a cooling section on reel temperature or cooling stop temperature.
- the invention is therefore further distinguished by the fact that the metallurgical production plant has a process chain comprising a furnace, a rolling mill, in particular the hot rolling and / or plate mill, and a cooling section, and that operating parameters of the entire process chain of this metallurgical plant are included in the program.
- the metallurgical production plant comprises a steelworks and / or a continuous casting plant, which is / are also comprised of the microstructure simulator and / or microstructure monitor and / or structural model, which then forms a so-called Level 3 tool.
- the invention therefore finally also provides that the metallurgical plant comprises an area, in particular a steelworks and / or a continuous casting plant, in which the metallic steel and / or iron alloy is molten and in the program operating parameters of the entire process chain of this area comprehensive metallurgical plant.
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Description
Die Erfindung richtet sich auf ein Verfahren zur Steuerung einer hüttentechnischen Produktionsanlage zur Herstellung eines Produktes aus einer metallischen Stahl- und/oder Eisenlegierung, wobei der Herstellprozess zumindest teilweise mittels eines Gefügesimulators und/oder Gefügemonitors und/oder Gefügemodells gesteuert wird, welcher/welches ein mindestens eine mechanische Festigkeitseigenschaft des erzeugten, die metallische Stahl- und/oder Eisenlegierung enthaltenden Produktes berechnendes Programm umfasst, mittels welchem die mindestens eine mechanische Festigkeitseigenschaft in Abhängigkeit von einer jeweiligen Prozesskette auf Basis errechneter metallurgischer Phasenbestandteile und/oder deren jeweiliger Anteile am sich einstellenden metallurgischen Gefüge des hergestellten Produktes berechnet wird, wobei die Prozesskette der hüttentechnischen Produktionsanlage ein Warmwalz- und/oder Grobblechwalzwerk mit einer abschließenden Kühlstrecke umfasst und in die Berechnung der mindestens einen mechanischen Festigkeitseigenschaft Betriebsparameter der hüttentechnischen Produktionsanlage, von welchen die erhaltene mindestens eine mechanische Festigkeitseigenschaft abhängt, mit zumindest teilweise vorab gesetzten, anpassbaren Ausgangswerten eingehen.The invention is directed to a method for controlling a metallurgical production plant for producing a product from a metallic steel and / or iron alloy, wherein the manufacturing process is controlled at least partially by means of a microstructure simulator and / or microstructure and / or structural model, which / at least one a mechanical strength property of the produced, the metallic steel and / or iron containing product containing program comprises, by means of which the at least one mechanical strength property depending on a respective process chain based on calculated metallurgical phase components and / or their respective shares in the adjusting metallurgical microstructure the process chain of the metallurgical production plant includes a hot rolling and / or plate rolling mill with a final cooling section and in the calculation of the at least one mechanical strength property operating parameters of the metallurgical production plant, on which the obtained at least one mechanical strength property depends, with at least partially set in advance, customizable initial values.
Beim Betrieb von Warmband- und/oder Grobblechstraßen werden neben der Umformung im Walzwerk als wesentliche Zielgrößen die Haspel- oder Kühlstopptemperatur sowie die Abkühlrate vorgegeben, da damit die mechanischen Festigkeitseigenschaften des erhaltenen Produktes zum großen Teil eingestellt werden können. Veränderungen in diesen Parametern machen sich daher zwangsläufig auch in Änderungen der mechanischen Festigkeitseigenschaften bemerkbar, die allerdings erst nachträglich anhand von Zugversuchen an aus dem hergestellten Produkt entnommenen Zugproben ermittelt werden können. Die jeweils gewünschten mechanischen Festigkeitseigenschaften in gewünschtem Maße einzustellen, ist eines der wesentlichen Ziele eines Walzprozesses, da diese Eigenschaften den für das hergestellte Produkt auf dem Markt erzielbaren Preis wesentlich (mit)bestimmen. Bei der Herstellung eines Produktes aus einer metallischen Stahl- und/oder Eisenlegierung in einer hüttentechnischen Anlage werden dessen mechanischen Festigkeitseigenschaften von weiteren (Betriebs)Parametern wie z.B. der Walzgeschwindigkeit oder der Endwalztemperatur beeinflusst. Eine konstante Haspeltemperatur garantiert somit nicht unbedingt auch konstante mechanische Festigkeitseigenschaften der jeweils gewünschten Art. Zwar können die Temperaturen des hergestellten Produktes unmittelbar nach dem Walzen bzw. vor dem Haspel online direkt z.B. mit Hilfe von Pyrometern oder anderen Temperaturmesseinrichtungen gemessen und somit direkt für die Regelung verwendet werden. Mechanische Festigkeitseigenschaften werden in der Regel aber erst mit großem Zeitversatz mit Hilfe von Zugversuchen gemessen und können somit nicht direkt für die Regelung eines jeweiligen hüttentechnischen Prozesses eingesetzt werden. Das vorab festgelegte Setzen von Prozess- oder Verfahrensparametern einer Metallbearbeitungsstraße im Walzwerk und der anschließenden Kühlstrecke führt somit nicht zwangsläufig zum Einhalten von Zielwerten der gewünschten mechanischen (Festigkeits)Eigenschaften. Diese können zudem auch nicht direkt und unmittelbar gemessen werden, so dass eine umgehende Korrektur der Prozess- oder Verfahrensparameter oder Betriebsparameter der hüttentechnischen Anlage nicht möglich ist.When operating hot strip and / or heavy plate mills, in addition to forming in the rolling mill, the reel or cooling stop temperature as well as the cooling rate are specified as the mechanical strength properties of the product obtained can be adjusted to a large extent. Changes in these parameters are therefore inevitably also noticeable in changes in the mechanical strength properties, but only later on the basis of tensile tests on tensile specimens taken from the product produced can be determined. Setting the respective desired mechanical strength properties to the desired extent is one of the essential goals of a rolling process, since these properties substantially determine the price that can be achieved for the product produced on the market. When producing a product from a metallic steel and / or iron alloy in a metallurgical plant, its mechanical strength properties are influenced by further (operating) parameters such as, for example, the rolling speed or the final rolling temperature. A constant reel temperature thus does not necessarily guarantee constant mechanical strength properties of the respective desired type. Although the temperatures of the product produced can be measured directly after rolling or before the reel online directly eg using pyrometers or other temperature measuring devices and thus used directly for the control become. However, mechanical strength properties are generally measured only with a large time offset with the aid of tensile tests and thus can not be used directly for the regulation of a respective metallurgical process. The predetermined setting of process or process parameters of a metal working line in the rolling mill and the subsequent cooling section thus does not necessarily lead to compliance with target values of the desired mechanical (strength) properties. Moreover, these can not be measured directly and directly, so that an immediate correction of the process or process parameters or operating parameters of the metallurgical plant is not possible.
Im Stand der Technik sind daher Modelle und auch Gefügemodelle entwickelt worden, die die Berechnung erhaltener mechanischer Festigkeitswerte online mit umgehender Einflussnahme auf die Betriebsparameter der hüttenmännischen Anlage ermöglichen.In the prior art, therefore, models and also structural models have been developed which enable the calculation of mechanical strength values obtained online with immediate influence on the operating parameters of the metallurgical plant.
So offenbart die
Aus der
Die
Durch die direkte Berechnung von mechanischen Eigenschaften in einem geeigneten Modell können die dafür notwendigen Prozessparameter mit größtmöglicher Genauigkeit festgelegt werden. Hierbei sind bei Stahl im Wesentlichen die Phasenbestandteile an Austenit, Ferrit, Perlit, Bainit und Martensit von entscheidender Bedeutung für die resultierenden mechanischen Festigkeitseigenschaften.By directly calculating mechanical properties in a suitable model, the necessary process parameters can be defined with the greatest possible accuracy. In the case of steel, essentially the phase constituents of austenite, ferrite, pearlite, bainite and martensite are of decisive importance for the resulting mechanical strength properties.
Stahlwerkstoffen werden Legierungselemente beigegeben, um unter den jeweils gegebenen Prozess- und Verfahrensbedingungen optimale mechanische Festigkeitseigenschaften eines daraus hergestellten Produktes zu erhalten. Die dem jeweiligen Stahlwerkstoff zuzugebende Menge an Legierungselementen richtet sich vor allem nach den im jeweiligen Anwendungsfall gewünschten mechanischen Festigkeitseigenschaften. Legierungselemente sind sehr teuer, weshalb versucht wird, die Kosten für die Legierung zu reduzieren oder zu optimieren. Da jeweils konkrete Vorhersagen über das durch eine Zugabe von Legierungselementen zu erreichende Ergebnis in Bezug auf die mechanischen Festigkeitswerte des jeweiligen Stahlproduktes bisher nicht möglich sind, muss anhand von experimentellen Versuche ermittelt werden, welche Menge an einem jeweiligen Legierungselement welchen Einfluss auf die mechanischen Eigenschaften oder mechanischen Festigkeitseigenschaften eines jeweiligen Stahlproduktes ausübt.Steel materials are added to alloying elements in order to obtain optimal mechanical strength properties of a product produced therefrom under the given process and process conditions. The amount of alloying elements to be added to the respective steel material depends above all on the mechanical strength properties desired in the respective application. Alloying elements are very expensive, which is why it is attempted to reduce or optimize the costs of the alloy. Since in each case concrete predictions about the result to be achieved by adding alloying elements with respect to the mechanical strength values of the respective steel product are not possible, it must be determined by experimental experiments which amount of a respective alloying element has an effect on the mechanical properties or mechanical properties Strength properties of a particular steel product exercises.
Aus der
Bei einem Verfahren der eingangs näher bezeichneten Art wird diese Aufgabe erfindungsgemäß dadurch gelöst, dass als in die Berechnung der mindestens einen Festigkeitseigenschaft eingehender Betriebsparameter der hüttentechnischen Produktionsanlage der jeweilige Massenanteil mindestens eines Legierungselementes, vorzugsweise aller Legierungselemente, das/die in der chemischen Zusammensetzung der eingesetzten metallischen Stahl- und/oder Eisenlegierung vorhanden ist/sind, und mindestens ein weiterer Betriebsparameter, insbesondere eine bei der Herstellung des Produktes auf dieses einwirkende Abkühlrate, vorzugsweise eine sich im Rahmen einer nach einem Walzprozess durchgeführten Abkühlung einstellende Abkühlrate, erfasst werden und eine durch eine Änderung mindestens dieses weiteren Betriebsparameters, insbesondere eine Erhöhung der Abkühlrate, erzielbare oder erzielte Erhöhung der betrachteten Festigkeitseigenschaft durch eine Verminderung des Massenanteils eines oder mehrerer der Legierungselemente an der chemischen Zusammensetzung der eingesetzten metallischen Stahl- und/oder Eisenlegierung zumindest teilweise kompensiert und/oder ausgeglichen wird.In a method of the type described in more detail, this object is achieved in that as detailed in the calculation of at least one strength property operating parameters of the metallurgical production plant, the respective mass fraction of at least one alloying element, preferably all alloying elements, the / in the chemical composition of the metallic Steel and / or iron alloy is / are present, and at least one other operating parameters, in particular a in the manufacture of the product acting on this cooling rate, preferably a setting in the context of a cooling process after a cooling cooling rate, are detected and a by a change at least this further operating parameter, in particular an increase in the cooling rate, achievable or achieved increase in the considered strength property by reducing the mass fraction of one or more rer of the alloying elements is at least partially compensated and / or compensated for the chemical composition of the metallic steel and / or iron alloy used.
Mit der Erfindung ist es folglich möglich, den Einsatz an Legierungsmittel(n) dahingehend zu optimieren, dass nur die bei den erreichbaren Abkühlraten oder bei einem anderen der weiteren Betriebsparameter jeweils mindestens zur Erreichung der betrachteten Festigkeitseigenschaft notwendigerweise benötigten Massenanteile an Legierungsmittel(n) in der chemischen Zusammensetzung der jeweiligen Stahl- und/oder Eisenlegierung vorhanden sind. Die betrachtete zu erreichende Festigkeitseigenschaft des hergestellten Produktes wird folglich beispielsweise durch die mögliche oder eingestellte Abkühlrate festgelegt, bestimmt und geregelt, wohingegen die chemische Zusammensetzung in Abhängigkeit davon angepasst wird.With the invention, it is thus possible to optimize the use of alloying agent (s) in such a way that only the proportions by mass of alloying agent (s) required in the achievable cooling rates or in another of the further operating parameters in each case at least to achieve the considered strength property chemical composition of the respective steel and / or iron alloy are present. The considered too The resulting strength property of the product produced is thus determined, determined and regulated, for example, by the possible or set cooling rate, whereas the chemical composition is adjusted as a function thereof.
Erfindungsgemäß werden also der Einfluss und der Beitrag der jeweils vorhandenen Legierungselemente auf die mechanischen Festigkeitseigenschaften des erzeugten Produktes aufgrund der durch sie verursachten oder beeinflussten Mischkristallausscheidungshärtung bei der Berechnung der mechanischen Festigkeitseigenschaften bzw. der mindestens einen mechanischen Festigkeitseigenschaft berücksichtigt. Mit dem erfindungsgemäßen Verfahren lässt sich der Einfluss der Legierungselemente auf die mechanischen Festigkeitseigenschaften genau ermitteln. Wird zum Beispiel etwas Mangan hinzugegeben, wird diese Änderung sofort mit dem in dem Gefügesimulator und/oder Gefügemonitor und/oder Gefügemodell hinterlegten Programm ermittelt, so dass der Einfluss dieser Änderung auf die mechanischen Festigkeitseigenschaften oder zumindest eine mechanische Festigkeitseigenschaft des erzeugte Produkts feststellbar ist.According to the invention, therefore, the influence and the contribution of the respectively present alloying elements to the mechanical strength properties of the product produced are taken into account in the calculation of the mechanical strength properties or the at least one mechanical strength property due to the solid solution precipitation hardening caused or influenced by them. With the method according to the invention, the influence of the alloying elements on the mechanical strength properties can be determined precisely. If, for example, some manganese is added, this change is determined immediately with the program stored in the microstructure simulator and / or microstructure model and / or microstructure model so that the influence of this change on the mechanical strength properties or at least a mechanical strength property of the product produced can be determined.
Ein Betreiber kann mit diesem Wissen eine Modernisierung der Kühlstrecke eines Walzwerks durchführen, um beispielsweise die Kühlrate zu erhöhen. Diese höhere Kühlrate hat einen Einfluss auf die mechanischen Festigkeitseigenschaften und kann gezielt eingesetzt werden, um die mechanischen Festigkeitseigenschaften zu verändern. Dazu liefert der Gefügesimulator und/oder Gefügemonitor und/oder das Gefügemodell mit dem darin hinterlegten Programm die notwendigen Informationen. Das Programm berücksichtigt die höhere Kühlrate und ermittelt die daraus resultierende Änderung der Festigkeitseigenschaften. Es ergeben sich also bei gleicher chemischer Analyse bzw. Zusammensetzung der eingesetzten Legierung und einer höheren Kühlrate andere mechanischen Festigkeitseigenschaften oder es lassen sich dieselben mechanischen Festigkeitseigenschaften mit weniger Legierungselementen, d.h. einem geringeren Massenanteil oder Gewichtsanteil (Gewichtsprozent) an Legierungselementen erreichen, so dass Kosten eingespart werden. Diese Kosten können mit dem in dem Gefügesimulator und/oder Gefügemonitor und/oder Gefügemodell hinterlegten Programm, das die mindestens eine mechanische Festigkeitseigenschaft des hergestellten Produktes in Abhängigkeit von der jeweiligen Prozesskette eines Walzwerks auf Basis errechneter metallurgischer Phasenbestandteile und/oder deren jeweiligen Anteilen am sich einstellenden metallurgischen Gefüge des hergestellten Produktes errechnet, quantifiziert werden.An operator can use this knowledge to modernize the cooling section of a rolling mill to increase, for example, the cooling rate. This higher cooling rate has an influence on the mechanical strength properties and can be used selectively to change the mechanical strength properties. For this purpose, the microstructure simulator and / or microstructure monitor and / or the microstructure model with the program stored therein provides the necessary information. The program takes into account the higher cooling rate and determines the resulting change in the strength properties. Thus, with the same chemical analysis or composition of the alloy used and a higher cooling rate, other mechanical strength properties result or the same mechanical strength properties can be achieved with fewer alloying elements, ie a smaller one Achieve mass fraction or weight fraction (weight percent) of alloying elements, so that costs are saved. These costs can be set with the program stored in the microstructure simulator and / or microstructure model and / or microstructure model, which adjusts the at least one mechanical strength property of the product produced as a function of the respective process chain of a rolling mill on the basis of calculated metallurgical phase constituents and / or their respective proportions metallurgical microstructure of the product produced can be quantified.
Weiterhin ist es möglich, die Auswirkungen von geänderten Prozessparametern mit dem hinterlegten Programm zu berechnen. Wird beispielsweise die Walzstraßen- oder Fertigstraßentemperatur erhöht und gleichzeitig die Haspeltemperatur gesenkt, so ermittelt das hinterlegte Programm die notwendigen Änderungen der Prozess- oder Betriebsparameter und berechnet entsprechend die mechanischen Festigkeitseigenschaften, die sich durch diese Änderung ergeben. Mit dem Gefügesimulator und/oder Gefügemonitor und/oder Gefügemodell und dem darin hinterlegten Programm steht dem Betreiber ein neues Werkzeug zur Verfügung, um eine Materialentwicklung durch optimale Einstellung der Prozess-, Verfahrens- und/oder Betriebsparameter der das Walzwerk mit Kühlstrecke umfassenden Prozesskette der hüttentechnischen Anlage durchzuführen und eine gewünschte mechanische Festigkeitseigenschaft des Materials zu erhalten.It is also possible to calculate the effects of changed process parameters with the stored program. For example, as the mill or finishing line temperature is increased and at the same time the coiler temperature is lowered, the stored program determines the necessary changes in the process or operating parameters and accordingly calculates the mechanical strength properties resulting from that change. With the microstructure simulator and / or microstructure monitor and / or structural model and the program stored therein, the operator has a new tool available for material development through optimal adjustment of the process, process and / or operating parameters of the process chain comprising the rolling mill with cooling section Perform plant and obtain a desired mechanical strength property of the material.
In Ausgestaltung sieht die Erfindung vor, dass der jeweilige erfasste Massenanteil an Legierungselemente(n) und/oder der jeweils erfasste mindestens eine weitere Betriebsparameter, insbesondere die jeweils erfasste Abkühlrate, mit einer zählbaren Anzahl einer einen Bewertungsmaßstab abbildenden Bewertungseinheit bewertet wird/werden. Damit kann dann sowohl dem durch die Änderung der Legierungszusammensetzung zuzuschreibenden Einfluss als auch dem durch eine Änderung des weiteren Betriebsparameters, insbesondere der Abkühlrate, bewirkten Einfluss auf die Änderung der betrachteten mechanischen Festigkeitseigenschaft des hergestellten Produktes ein Kostenwert zugeordnet werden.In an embodiment, the invention provides that the respective detected mass fraction of alloying elements (n) and / or the respectively detected at least one further operating parameter, in particular the respectively detected cooling rate, is / are evaluated with a countable number of a rating unit depicting a valuation unit. Thus, both the influence attributable to the change in the alloy composition and the change in the further operating parameter, in particular the Cooling rate, caused influence on the change of the considered mechanical strength property of the manufactured product can be assigned a cost value.
Um unmittelbar einen bewerteten Vergleich zwischen unterschiedlichen Kombinationen von Änderungen der chemischen Zusammensetzung des eingesetzten Stahl- und/oder Eisenlegierungsmaterials und Änderungen der Abkühlraten vornehmen zu können, sieht die Erfindung in weiterer Ausgestaltung auch vor, dass mittels des Programms die jeweiligen Summenwerte der zählbaren Bewertungseinheiten, die sich für die jeweils betrachtete Festigkeitseigenschaft bei unterschiedlichen Kombinationen aus jeweils einem mit einer Anzahl an zählbaren Bewertungseinheiten bewerteten Massenanteil an Legierungsmittel(n) und einem mit einer Anzahl an zählbaren Bewertungseinheiten bewerteten weiteren Betriebsparameter, insbesondere einer Abkühlrate, ergeben, ermittelt und/oder dargestellt werden.In order to be able to carry out an immediate comparison between different combinations of changes in the chemical composition of the steel and / or iron alloy material used and changes in the cooling rates, the invention also provides in a further embodiment that the respective summation values of the countable valuation units, the arise, be determined and / or represented for each considered strength property in different combinations of a weighted at a number of countable valuation units mass fraction of alloying agent (s) and a counted with a number of countable valuation units further operating parameters, in particular a cooling rate.
Um die vergleichende Bewertung durchführen zu können, ist es zweckmäßig, wenn das Programm einen mathematischen Term und/oder Algorithmus umfasst, mittels welchem die jeweilige Anzahl an Bewertungseinheiten und/oder die verschiedenen ermittelten Summenwerte miteinander verglichen werden.In order to be able to carry out the comparative evaluation, it is expedient if the program comprises a mathematical term and / or algorithm by means of which the respective number of evaluation units and / or the different sum values determined are compared with one another.
Ergänzend umfasst das erfindungsgemäße Verfahren also auch eine Bewertung des Einflusses der Legierungszusammensetzung und der Abkühlrate in Bezug auf die jeweils zu erreichende(n) gewünschte(n) mechanische(n) Festigkeitseigenschaft(en). Die Bewertung erfolgt mittels einen Bewertungsmaßstab abbildender Bewertungseinheiten, mit denen die Legierungszusammensetzung und die Abkühlraten bewertet werden. Die Bewertungseinheiten können technisch quantitativer Art sein, wie beispielsweise Δ Festigkeitssteigerung/Δ Massenprozentanteil der Summe an Legierungselementen gegenüber Δ Festigkeitssteigerung/Δ Kühlwassermenge. Diesen Bewertungseinheiten können aber (zusätzlich) auch Kosten, also monetäre Werte, zugeordnet werden, wie dies der
Diese Abschätzung und Bewertung ist bei der Erfindung mittels des Gefügemodells und/oder Gefügemonitors und/oder Gefügesimulators möglich. Insbesondere sind die Einflussnahmen der jeweiligen Parameter dann im erfindungsgemäßen Sinne mittels der einen Bewertungsmaßstab abbildenden Bewertungseinheiten auch monetär quantifizierbar, wenn derartige wirtschaftliche oder monetäre Abhängigkeiten in dem Gefügemodell und/oder Gefügemonitor und/oder Gefügesimulator hinterlegt sind, wie sie der
Wenn also der Betreiber einer hüttentechnischen Produktionsanlage in der Lage ist, während der beispielsweise nach einem Walzprozess erfolgenden und notwendigen Abkühlung des erhaltenen Produktes eine höhere Kühlrate zu realisieren, beispielsweise durch einen Umbau der Kühlstrecke mit einer Erhöhung der Kühlkapazitäten, so kann hierdurch ein Festigkeitsanstieg, d.h. eine Erhöhung der betrachteten mechanischen Festigkeitseigenschaft erreicht werden. Der durch diese erhöhte Abkühlrate erreichte Effekt eines Festigkeitsanstieges kann nun dazu genutzt werden, durch Änderung der chemischen Zusammensetzung der eingesetzten Stahl- und/oder Eisenlegierung einen gegenläufigen Effekt zu erzielen. Mit dem erfindungsgemäßen Verfahren und dem dabei angewandte Programm ist es nun möglich, den Einfluss einer geänderten, reduzierte Mengenanteile an Legierungselementen aufweisenden chemischen Zusammensetzung einer eingesetzten Legierung auf die zu erhaltende und betrachtete mechanische Festigkeitseigenschaft des erhaltenen Produktes zu berechnen. Diese Berechnung wird dann so lange wiederholt, bis der durch die erhöhte Kühlrate hervorgerufene Festigkeitsanstieg auf "0" reduziert ist, so dass der durch die erhöhte Abkühlrate bewirkte Festigkeitsanstieg oder Anstieg des Wertes der mechanischen Festigkeitseigenschaft aufgebraucht ist und wieder der ursprüngliche Wert der mechanischen Festigkeitseigenschaft vorliegt. Die durch die Einsparung von Legierungselementen bewirkte Kostenersparnis wiegt dabei die durch die höhere Abkühlrate erforderliche Kostenerhöhung auf. Bei einem typischen Nb legierten Feinkornbaustahl mit ca. 0,07 % C, 0,7 % Mn, 0,2 % Si, 0,04 % Nb, 0,084 % Ni, 0,034 % Mo, 0,084 % Cr, 0,0084 % V und 0,0084 % Ti lassen sich ca. 4 % der üblicherweise 30,00 EUR/t betragenden Legierungskosten auf diese Weise durch verminderte Legierungsgehalte einsparen, so dass die Legierungskosten bei diesem Beispiel auf 28,80 EUR/t abgesenkt werden. Bei dem Betrieb einer hüttentechnischen Produktionsanlage mit einer jährlichen Produktion von 1 Mio t können somit ca. 1,20 Mio EUR an Legierungskosten für einen solchen Feinkornbaustahl pro Jahr eingespart werden.Thus, if the operator of a metallurgical production plant is able to realize a higher cooling rate during, for example, after a rolling process and necessary cooling of the product obtained, for example by a conversion of the cooling section with an increase the cooling capacity, so this can be achieved by increasing the strength, ie an increase in the considered mechanical strength property. The effect of increasing the strength achieved by this increased cooling rate can now be used to achieve an opposite effect by changing the chemical composition of the steel and / or iron alloy used. With the method according to the invention and the program used in the process, it is now possible to calculate the influence of an altered, reduced proportion of alloying elements having chemical composition of an alloy used on the obtained and considered mechanical strength property of the product obtained. This calculation is then repeated until the increase in strength caused by the increased cooling rate is reduced to "0", so that the increase in strength caused by the increased cooling rate or increase in the value of the mechanical strength property is used up and the original value of the mechanical strength property is restored , The cost savings caused by the saving of alloying elements thereby outweigh the cost increase required by the higher cooling rate. In a typical Nb alloyed fine grain structural steel containing about 0.07% C, 0.7% Mn, 0.2% Si, 0.04% Nb, 0.084% Ni, 0.034% Mo, 0.084% Cr, 0.0084% V and 0.0084% Ti can thus save about 4% of the usually 30.00 EUR / t alloying costs in this way by reduced alloy contents, so that the alloying costs are lowered in this example to 28.80 EUR / t. In the operation of a metallurgical production plant with an annual production of 1 million tonnes, approx. EUR 1.20 million of alloying costs for such a fine grain structural steel per year can be saved.
Mit dem erfindungsgemäßen Verfahren ist es möglich, für jeden Werkstoff die durch die Verminderung der Menge an eingesetzten Legierungselementen möglichen Einsparungen zu ermitteln. Werkstoffe mit hohen Legierungsanteilen bieten dabei ein hohes Einsparpotential, Werkstoffe mit weniger Legierungsanteilen ein entsprechend geringeres Potential. Mit dem erfindungsgemäßen Verfahren bzw. dem darin hinterlegten Programm ist es möglich, die Einsparmöglichkeiten für die gesamte Jahresproduktion einer betrachteten hüttentechnischen Produktionsanlage zu berechnen, wenn die Legierungskosten für den jeweils betrachteten Werkstoff, d.h. die jeweils betrachtete Stahl- und/oder Eisenlegierung, bekannt sind.With the method according to the invention, it is possible to determine the possible savings for each material by reducing the amount of alloying elements used. Materials with high alloy contents offer a high potential for savings, materials with fewer alloying parts a correspondingly lower potential. With the The method according to the invention or the program stored therein makes it possible to calculate the savings possibilities for the entire annual production of a considered metallurgical production plant, if the alloying costs for the respective considered material, ie the respective considered steel and / or iron alloy, are known.
Um den Einfluss der Legierungselemente auf die Streckgrenze als einer mechanischen Festigkeitseigenschaft des erhaltenen Produkts zu berücksichtigen, zeichnet sich die Erfindung weiterhin dadurch aus, dass das Programm einen den Einfluss von Massenanteilen an Legierungselementen in der chemischen Zusammensetzung der eingesetzten metallischen Stahl- und/oder Eisenlegierung auf die Streckgrenze des hergestellten Produktes abbildenden mathematischen Term und/oder Algorithmus umfasst.In order to consider the influence of the alloying elements on the yield strength as a mechanical strength property of the obtained product, the invention is further characterized in that the program has the influence of mass fractions of alloying elements in the chemical composition of the metallic steel and / or iron alloy used includes the yield strength of the manufactured product mapping mathematical term and / or algorithm.
In besonders vorteilhafter Ausgestaltung der Erfindung ist dabei vorgesehen, dass der Term die Gleichung
Von Vorteil ist es weiterhin, wenn die nach der Umwandlung sich in dem hergestellten Produkt letztendlich einstellende Korngröße mit dem in dem Gefügesimulator und/oder Gefügemonitor und/oder Gefügemodell hinterlegten Programm ebenfalls ermittelt werden kann, da die Korngröße entsprechend der Hall-Petch-Relation von Einfluss auf die mechanischen Festigkeitseigenschaften ist. Die Erfindung sieht in Ausgestaltung daher weiterhin vor, dass das Programm einen den Einfluss der Ferritkorngröße (d) des sich bei einer abschließenden Kühlung des Produktes bildenden Ferritgefüges auf die Streckgrenze abbildenden Term in Form der Gleichung
Da die sich bildende Ferritkorngröße von der jeweiligen Abkühlrate abhängt, sieht die Erfindung weiterhin vor, dass das Programm einen den Einfluss der Abkühlrate auf die sich bei einer abschließenden Kühlung des Produktes bildende Ferritkorngröße (da) des Ferritgefüges abbildenden Term in Form der Gleichung
Da die mechanischen Festigkeitseigenschaften üblicherweise nicht zeitnah gemessen werden können, findet erfindungsgemäß ein Modell Anwendung, das einen Gefügesimulator und/oder Gefügemonitor und/oder ein Gefügemodell umfasst, welcher/welches ein mindestens eine mechanische Festigkeitseigenschaft des erzeugten, die metallische Stahl- und/oder Eisenlegierung enthaltenden Produktes berechnendes Programm umfasst, das die mindestens eine mechanische Festigkeitseigenschaft in Abhängigkeit von der jeweiligen Prozesskette der hüttentechnischen Anlage auf Basis errechneter metallurgischer Phasenbestandteile und/oder deren jeweiligen Anteilen am sich einstellenden metallurgischen Gefüge des hergestellten Produktes errechnet. Ein solches Modell ist das sogenannte MPC- (Mechanical Property Calculator) - Programm, das die mechanischen Eigenschaften abhängig von den Prozessbedingungen in der gesamten Prozesskette bestehend aus Ofen, Walzstraße und Kühlstrecke bestimmt. Dies ermöglicht das Einstellen neuer Sollwerte für die Haspeltemperatur bzw. Kühlrate. Zusätzlich ist das Modell für Regelungszwecke in der Trimmwasserzone geeignet. Als Regelungsgrößen können die Streckgrenze bzw. die Zugfestigkeit nach dem Kühlen verwendet werden. Bei Vorgabe dieser Setzwerte berechnet das Modell die dafür notwendigen Prozessparameter. Die Ergebnisse sind sofort sichtbar und werden bei jeder neuen zyklischen Berechnung aktualisiert. Kern des MPC-Programmes ist die Berechnung der mechanischen Festigkeitseigenschaften des produzierten Werkstoffes nach der Abkühlung. Die Berechnung erfolgt über semi-empirische Gleichungen. Die Berechnung erfolgt für verschiedene Volumenelemente des Bandes oder Bleches. Das Band oder Blech wird daher in kleine Elemente unterteilt. Während der Berechnung werden die Prozessgrößen wie Walzgeschwindigkeit und Walztemperatur berücksichtigt. Diese gehen bei einer Änderung sofort in die neue Rechnung ein. Als Ergebnis ergibt sich eine Verteilung von mechanischen (Festigkeits)Eigenschaften im Band oder Blech.Since the mechanical strength properties can not usually be measured in a timely manner, according to the invention a model is used which comprises a microstructure simulator and / or microstructure monitor and / or a structural model which has at least one mechanical strength property of the generated metallic steel and / or iron alloy comprising calculating the at least one mechanical strength property as a function of the respective process chain of the metallurgical plant on the basis of calculated metallurgical phase constituents and / or their respective proportions on the adjusting metallurgical structure of the product produced. Such a model is the so-called MPC (Mechanical Property Calculator) program, which determines the mechanical properties depending on the process conditions in the entire process chain consisting of furnace, rolling train and cooling section. This makes it possible to set new setpoint values for the reel temperature or cooling rate. In addition, the model is suitable for control purposes in the trim water zone. As control variables, the yield strength or the tensile strength can be used after cooling. When specifying these set values, the model calculates the necessary process parameters. The results are immediately visible and updated with each new cyclic calculation. The core of the MPC program is the calculation of the mechanical strength properties of the produced material after cooling. The calculation is done by semi-empirical equations. The calculation is made for different volume elements of the strip or sheet. The tape or sheet is therefore divided into small elements. During the calculation, the process variables such as rolling speed and rolling temperature are taken into account. These are included in a change immediately in the new bill. The result is a distribution of mechanical (strength) properties in the strip or sheet.
Basis der Berechnung der mechanischen (Festigkeits)Eigenschaften ist die Berechnung der Phasenbestandteile des produzierten Werkstoffs. Hierzu ist es nötig, den präzisen Abkühlverlauf des Metalls zu berechnen und anhand dieser Kühlkurve, die selbst wiederum durch die metallurgische Gefüge-Umwandlung beeinflusst wird, den Zerfall des Austenits in die Bestandteile Ferrit, Perlit, Bainit und Martensit zu modellieren. Verwendet man dieses Modell für die Berechnung mechanischer (Festigkeits)Eigenschaften, so muss ein Abgleich mit gemessenen Werten stattfinden, um eine gute Vorhersage der mechanischen (Festigkeits)Eigenschaften zu gewährleisten. Es wurden daher mit Hilfe des Modells berechnete Werte mit aus Zugproben ermittelten Werten verglichen und festgestellt, dass eine hervorragende Korrelation zwischen den berechneten und den gemessenen Werten bei einer geringen Streuung der Messwerte besteht. Diese Übereinstimmung ergibt sich bei verschiedenen Anlagentypen (Warmbandstraße, Grobblechstraße und Stranggießanlage, insbesondere CSP-Anlage).The basis of the calculation of the mechanical (strength) properties is the calculation of the phase components of the produced material. This is it It is necessary to calculate the precise cooling curve of the metal and to model the decay of the austenite into ferrite, perlite, bainite and martensite using this cooling curve, which itself is influenced by the metallurgical microstructure transformation. If this model is used for the calculation of mechanical (strength) properties, a comparison with measured values must take place in order to ensure a good prediction of the mechanical (strength) properties. Therefore, values calculated with the help of the model were compared with values obtained from tensile specimens and it was found that there was an excellent correlation between the calculated and the measured values with a small dispersion of the measured values. This correspondence results in different types of plant (hot strip mill, heavy plate mill and continuous casting plant, in particular CSP plant).
Mittels der Berechnungen im MPC Modell ist es möglich, eine aktuell bestehende Produktions- oder Prozesssituation zu analysieren und zu optimieren. So können durch eine Verbesserung des Legierungskonzeptes die Kosten für die Legierungselemente reduziert werden, da ein Kosten-Nutzen Verhältnis berechnet werden kann. Die Erfindung zeichnet sich in Weiterbildung daher auch dadurch aus, dass mittels des Programms die Betriebsparameter zumindest bezüglich der mindestens einen zu erreichenden mechanischen Festigkeitseigenschaft optimiert werden. Mit dem erfindungsgemäßen Verfahren lassen sich die Festigkeitseigenschaften eines herzustellenden Produktes mit gegebener chemischer Zusammensetzung berechnen. Werden die Betriebsparameter wie beispielsweise die Lastverteilung in der Fertigstraße (walzen), die Endwalztemperatur, die Kühlstrategie oder die Haspeltemperatur verändert, ändern sich die erhaltenen mechanischen Festigkeitseigenschaften. Das bei der Durchführung des erfindungsgemäßen Verfahrens zur Anwendung kommende Programm führt eine Optimierung der eingestellten bzw. einzustellenden Betriebsparameter durch und bestimmt so die besten Festigkeitseigenschaften.By means of the calculations in the MPC model, it is possible to analyze and optimize a currently existing production or process situation. Thus, by improving the alloy concept, the costs for the alloying elements can be reduced since a cost-benefit ratio can be calculated. The invention is therefore also characterized in a further development in that the operating parameters are optimized by means of the program at least with regard to the at least one mechanical strength property to be achieved. With the method according to the invention, the strength properties of a product to be produced can be calculated with a given chemical composition. If the operating parameters such as the load distribution in the finishing train (rolling), the final rolling temperature, the cooling strategy or the coiler temperature changes, the resulting mechanical strength properties change. The program used in carrying out the method according to the invention carries out an optimization of the set operating parameters to be set and thus determines the best strength properties.
Weiterhin können Auswirkungen einer verbesserten Anlagentechnik berücksichtigt werden, so zum Beispiel eine erhöhte maximale Walzkraft oder eine erhöhte maximale Kühlrate oder ähnliches. Diese verbesserten Produktionsbedingungen ermöglichen die Erzielung verbesserter (Festigkeits)Eigenschaften des Materials bzw. reduzierte Kosten bei dessen Herstellung. Es ist somit möglich, eine Materialentwicklung zu betreiben, indem die Einstellung der Prozessparameter im Walzwerk sowie in der Kühlstrecke optimal in Bezug auf die jeweils gestellten Anforderungen erfolgt.Furthermore, effects of an improved system technology can be taken into account, for example an increased maximum rolling force or an increased maximum cooling rate or the like. These improved production conditions allow the achievement of improved (strength) properties of the material or reduced costs in its production. It is thus possible to operate a material development by optimally adjusting the process parameters in the rolling mill and in the cooling section with respect to the respective requirements.
Die Betriebsparameter in einzelnen Verarbeitungsschritten der Prozesskette im Stahlwerk, Walzwerk und der Kühlstrecke können im Hinblick auf die jeweils gewünschte mechanische Festigkeitseigenschaft mit dem bei dem erfindungsgemäßen Verfahren zur Anwendung kommenden Programm dadurch optimiert werden, dass die einzelnen Gefügeänderungen in den einzelnen Verarbeitungsschritten ermittelt und daraus ein Gefüge mit optimierten Eigenschaften iterativ bestimmt wird. Damit können herkömmliche Prozesse optimiert werden oder kann die Entwicklung und Herstellung neuer Werkstoffe beschleunigt werden. Hierdurch lassen sich erhebliche Kosten bei der Materialentwicklung sparen.The operating parameters in individual processing steps of the process chain in the steel mill, rolling mill and the cooling section can be optimized with respect to the respective desired mechanical strength property with the program used in the inventive program by the fact that the individual structural changes in the individual processing steps determined and from a microstructure is determined iteratively with optimized properties. Thus, conventional processes can be optimized or the development and production of new materials can be accelerated. This can save considerable costs in material development.
Zudem werden häufig aufgrund großer Konvertergefäße Vormaterial oder Brammen erzeugt, die angesichts kleiner Bestellmengen oder kleiner Losgrößen zum Teil (zwischen)gelagert werden müssen. Dies hat hohe Lagerbestände mit entsprechenden Lagerkosten zur Folge. Mittels des erfindungsgemäßen Verfahrens ist es möglich, Brammen gleicher Analyse, d.h. gleicher chemischer Zusammensetzung, aber unterschiedlicher Herstellungsparameter, zu verarbeiten und aufgrund der unterschiedlichen Herstellungs- bzw. Betriebsparameter auf verschiedene Festigkeitseigenschaften einzustellen. Dies ist durch Anwendung eines entsprechenden Iterationsverfahrens möglich, mittels welchem mögliche erreichbare mechanische Festigkeitseigenschaften mittels des bei dem erfindungsgemäßen Verfahren Anwendung findenden Programms ermittelt werden oder ermittelbar sind. Auf diese Weise kann eine Reduzierung von Lagerbeständen erfolgen bzw. der Lageraufwand vermindert und die Wirtschaftlichkeit erhöht werden.In addition, due to large converter vessels, semi-finished material or slabs are often produced which, in view of small order quantities or small batch sizes, must be partially stored (between). This results in high inventories with corresponding storage costs. By means of the method according to the invention, it is possible to process slabs of the same analysis, ie of the same chemical composition but different production parameters, and to adjust them to different strength properties on account of the different production or operating parameters. This is possible by using a corresponding iteration method by means of which possible achievable mechanical strength properties are determined by means of the program used in the method according to the invention be or can be determined. In this way, a reduction of inventories can take place or the storage costs are reduced and the efficiency can be increased.
Die Erfindung ermöglicht weiterhin die Online-Visualisierung der sich aktuell jeweils einstellenden mechanischen (Festigkeits)Eigenschaften indem in Weiterbildung vorgesehen ist, dass die jeweils berechnete mindestens eine mechanische Festigkeitseigenschaft online an einem Steuerstand angezeigt wird. Hierdurch werden manuelle Eingriffe aufgrund von Informations- und Statusmeldungen ermöglicht und führen zu geringerem Produktionsausfall.The invention further enables on-line visualization of the currently adjusting mechanical (strength) properties by providing in a further development that the respectively calculated at least one mechanical strength property is displayed online at a control station. This allows manual intervention based on information and status messages and leads to less production downtime.
Zusätzlich kann aber auch eine automatische Steuerung der Ziel-Festigkeitseigenschaften Verwendung finden. Dadurch kann in Echtzeit auf Störungen reagiert und der weitere Produktionsablauf so optimiert werden, dass die gewünschte mindestens eine mechanische Festigkeitseigenschaft erreicht wird. Dies geschieht durch eine automatische Korrektur zumindest der oder einiger Verfahrensparameter im Walzwerk und in der Kühlstrecke. So wird über der Band- bzw. Blechlänge für eine homogene Eigenschaftsverteilung gesorgt. Die Erfindung zeichnet sich daher weiterhin auch dadurch aus, dass mittels der berechneten mindestens einen mechanischen Festigkeitseigenschaft Betriebsparameter der hüttentechnischen Anlage gesteuert werden und die gewünschte mindestens eine mechanische Festigkeitseigenschaft automatisch angesteuert wird. Falls vorgegebene Soll-Betriebsparameter (beispielsweise die vorgesehene Endwalztemperatur) beispielsweise aufgrund eine Betriebsstörung nicht eingehalten werden, werden möglicherweise auch die vorgesehenen mechanischen Festigkeitseigenschaft(en) nicht mehr erreicht. In einem solchen Fall führt das Programm bei dem erfindungsgemäßen Verfahren mit den jeweils aktuell gemessenen Werten/Daten eine Berechnung durch und verändert die übrigen Betriebsparameter (z.B. die Kühlstrategie und die Haspeltemperatur) derart, dass die gewünschten mechanischen Soll-Festigkeitseigenschaften (möglichst) dennoch erreicht werden. Die mechanische(n) Festigkeitseigenschaft(en) wird/werden so automatisch angesteuert.In addition, however, automatic control of the target strength properties may also be used. As a result, it is possible to react in real time to faults and to optimize the further production sequence in such a way that the desired at least one mechanical strength property is achieved. This is done by an automatic correction of at least one or several process parameters in the rolling mill and in the cooling section. Thus, over the strip or sheet length ensures a homogeneous distribution of properties. The invention is therefore also distinguished by the fact that operating parameters of the metallurgical plant are controlled by means of the calculated at least one mechanical strength property and the desired at least one mechanical strength property is automatically controlled. If predetermined desired operating parameters (for example, the intended final rolling temperature) are not met, for example because of a malfunction, the intended mechanical strength property (s) may no longer be achieved. In such a case, in the method according to the invention, the program carries out a calculation with the respectively currently measured values / data and changes the other operating parameters (eg the cooling strategy and the reel temperature) such that the desired desired mechanical strength properties (if possible) nevertheless be achieved. The mechanical strength property (s) is / are automatically controlled.
Die Erfindung kann in einem Walzwerk, beispielsweise einem Warmband- und Grobblechwalzwerk, bei der Herstellung von metallischen Bändern und Blechen aus Stahl- und Eisenlegierungen sowie an allen Stellen eines Produktionsprozesses, an denen stahl- oder eisenhaltige Werkstoffe gekühlt werden, insbesondere einer Warmband- und Grobblechstraße mit jeweils zugehörigen Aggregaten, Verwendung bzw. Anwendung finden. Vorzugsweise umfasst eine hüttentechnische Anlage zur Durchführung des erfindungsgemäßen Verfahrens ein Warmwalz- und/oder Grobblechwerk, bei welchem nach einem Ofen eine Umformung in einer beliebigen Anzahl an Gerüsten stattfindet, die sich auch in ein oder mehrere Vorgerüste und ein oder mehrere Fertiggerüste aufteilen können, und wobei das umgeformte Material anschließend in einer Kühlstrecke auf Haspeltemperatur bzw. Kühlstopptemperatur abgekühlt wird. Die Erfindung zeichnet sich daher weiterhin auch dadurch aus, dass die hüttentechnische Produktionsanlage eine einen Ofen, ein Walzwerk, insbesondere das Warmwalz- und/oder Grobblechwalzwerk, und eine Kühlstrecke umfassende Prozesskette aufweist und dass in das Programm Betriebsparameter der gesamten Prozesskette dieser hüttentechnischen Anlage eingehen.The invention can be used in a rolling mill, for example a hot strip and heavy plate rolling mill, in the production of metallic strips and sheets of steel and iron alloys and at all points of a production process in which steel or iron-containing materials are cooled, in particular a hot strip and plate mill each with associated units, use or application. Preferably, a metallurgical plant for carrying out the method according to the invention comprises a hot rolling and / or plate mill, in which after a furnace forming in any number of stands takes place, which can also be divided into one or more roughing and one or more finishing stands, and wherein the formed material is then cooled in a cooling section on reel temperature or cooling stop temperature. The invention is therefore further distinguished by the fact that the metallurgical production plant has a process chain comprising a furnace, a rolling mill, in particular the hot rolling and / or plate mill, and a cooling section, and that operating parameters of the entire process chain of this metallurgical plant are included in the program.
Es ist aber auch möglich, dass die hüttentechnische Produktionsanlage ein Stahlwerk und/oder eine Stranggießanlage umfasst, die ebenfalls von dem Gefügesimulator und/oder Gefügemonitor und/oder Gefügemodell umfasst ist/sind, der/das dann ein sogenanntes Level 3 tool ausbildet. Die Erfindung sieht daher schließlich auch vor, dass die hüttentechnische Anlage einen Bereich, insbesondere ein Stahlwerk und/oder eine Stranggießanlage, umfasst, in dem die metallische Stahl- und/oder Eisenlegierung schmelzflüssig vorliegt und dass in das Programm Betriebsparameter der gesamten Prozesskette der diesen Bereich umfassenden hüttentechnischen Anlage eingehen.However, it is also possible that the metallurgical production plant comprises a steelworks and / or a continuous casting plant, which is / are also comprised of the microstructure simulator and / or microstructure monitor and / or structural model, which then forms a so-called Level 3 tool. The invention therefore finally also provides that the metallurgical plant comprises an area, in particular a steelworks and / or a continuous casting plant, in which the metallic steel and / or iron alloy is molten and in the program operating parameters of the entire process chain of this area comprehensive metallurgical plant.
Insgesamt ergeben sich durch die Erfindung folgende Vorteile:
- Optimierung der Legierungskosten aufgrund eines verbesserten Legierungskonzepts
- Materialentwicklung durch optimale Einstellung der Prozessparameter
- Echtzeit-Visualisierung der mechanischen Eigenschaften und Anzeige von Informationsmeldungen
- Vollautomatische Echtzeit Steuerung der oder mindestens einer mechanischen Festigkeitseigenschaft(en)
- Durch den Einsatz des Gefügesimulators und/oder Gefügemonitors und/oder Gefügemodells ist es möglich, Betriebskosten zu senken sowie den Nutzen von Investitionskosten quantitativ zu beurteilen.
- Optimization of alloying costs due to improved alloying concept
- Material development through optimal adjustment of the process parameters
- Real-time visualization of mechanical properties and display of informational messages
- Fully automatic real-time control of or at least one mechanical strength property (s)
- By using the microstructure simulator and / or microstructure monitor and / or structural model, it is possible to reduce operating costs and to quantitatively assess the benefits of investment costs.
Claims (10)
- Method of controlling a metallurgical production plant for producing a product from a metallic steel alloy and/or iron alloy, wherein the production process is controlled at least partly by means of a structure simulator and/or structure monitor and/or structure model, which comprises a program calculating at least one mechanical strength property of the produced product containing the metallic steel and/or iron alloy, by means of which program the at least one mechanical strength property is calculated in dependence on a respective process chain on the basis of calculated metallurgical phase components and/or the respective proportions thereof at the resulting metallurgical structure of the produced product, wherein the process chain of the metallurgical production plant comprises a hot rolling mill and/or heavy plate rolling mill with a concluding cooling path and operating parameters of the metallurgical production plant, on which the obtained at least one mechanical strength property depends, together with at least partly preset, adaptable start values are included in the calculation of the at least one mechanical strength property, characterised in that the respective mass proportion of at least one alloying element, preferably all alloying elements, present in the chemical composition of the metallic steel and/or iron alloy used is detected as operating parameter, which is included in the calculation of the at least one strength property, of the metallurgical production plant and at least one cooling rate arising in the context of cooling carried out after a rolling process is detected as further operating parameter, and an increase, which is achievable or achieved by a change in at least this further operating parameter, particularly an increase in the cooling rate, of the relevant strength property of the produced product is at least partly compensated for and/or evened out by a reduction in the mass proportion of one or more of the alloying elements of the chemical composition of the metallic steel and/or iron alloy used, wherein the respective detected mass proportion of alloying element or elements and the respectively detected cooling rate are evaluated by a countable number of an evaluating unit reproducing an evaluation scale and by means of the program the respective summation values of the countable evaluating units, which for the respective relevant strength property in the case of different combinations respectively result from a mass proportion of alloying medium or media evaluated by a number of countable evaluating units and from a cooling rate evaluated by a number of countable evaluating units, are ascertained and/or represented, wherein the program comprises a mathematical term and/or algorithm by means of which the respective number of evaluating units and/or the differently determined summation values are compared with one another.
- Method according to claim 1, characterised in that the program comprises a mathematical term and/or algorithm reproducing the influence of mass proportions of alloying elements in the chemical composition of the metallic steel and/or iron alloy, which is used, on the yield strength of the product produced.
- Method according to any one of the preceding claims, characterised in that the program comprises a term which reproduces the influence of the ferrite grain size (d) of the ferrite structure, which forms in the case of a concluding cooling of the product, on the yield strength and which is in the form of the equation
- Method according to any one of the preceding claims, characterised in that the program comprises a term which reproduces the influence of the cooling rate on the ferrite grain size (da), which forms in the case of a concluding cooling of the product, of the ferrite structure and which is in the form of the equation
- Method according to any one of the preceding claims, characterised in that by means of the program the operating parameters are optimised at least with respect to at least one mechanical strength property to be achieved.
- Method according to any one of the preceding claims, characterised in that the respectively calculated at least one mechanical strength property is displayed on-line at a control stand of the metallurgical production plant.
- Method according to any one of the preceding claims, characterised in that operating parameters of the metallurgical production plant are controlled by means of the calculated at least one mechanical strength property and that the desired at least one mechanical strength property is automatically controlled.
- Method according to any one of the preceding claims, characterised in that the metallurgical production plant comprises a process chain comprising a furnace, a rolling mill, particularly the hot rolling mill and/or heavy plate rolling mill, and a cooling path and that operating parameters of the entire process chain of this metallurgical production plant are included in the program.
- Method according to any one of the preceding claims, characterised in that the metallurgical production plant comprises a region, particularly a steel works and/or a continuous casting plant, in which the metallic steel and/or iron alloy is present in molten state and that operating parameters of the entire process chain of the metallurgical production plant comprising this region are included in the program.
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DE102014201086 | 2014-01-22 | ||
DE102014224461.7A DE102014224461A1 (en) | 2014-01-22 | 2014-11-28 | Process for the optimized production of metallic steel and iron alloys in hot rolling and heavy plate mills by means of a microstructure simulator, monitor and / or model |
PCT/EP2015/050460 WO2015110310A1 (en) | 2014-01-22 | 2015-01-13 | Method for optimally producing metal steel and iron alloys in hot-rolled and thick plate factories using a microstructure simulator, monitor, and/or model |
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EP3096896A1 EP3096896A1 (en) | 2016-11-30 |
EP3096896B1 true EP3096896B1 (en) | 2017-12-20 |
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EP15701113.1A Active EP3096896B1 (en) | 2014-01-22 | 2015-01-13 | Method for optimally producing metal steel and iron alloys in hot-rolled and thick plate factories using a microstructure simulator, monitor, and/or model |
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US (1) | US20170002440A1 (en) |
EP (1) | EP3096896B1 (en) |
JP (1) | JP6297159B2 (en) |
KR (1) | KR20160105464A (en) |
CN (1) | CN106413931B (en) |
DE (1) | DE102014224461A1 (en) |
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WO2023057614A1 (en) | 2021-10-07 | 2023-04-13 | Sms Group Gmbh | Method for producing a rolled product with the optimized use of ingredients |
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Cited By (3)
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DE102020214532A1 (en) | 2020-11-18 | 2022-05-19 | Sms Group Gmbh | Method of processing transition slab or billet |
WO2023057614A1 (en) | 2021-10-07 | 2023-04-13 | Sms Group Gmbh | Method for producing a rolled product with the optimized use of ingredients |
DE102021211320A1 (en) | 2021-10-07 | 2023-04-13 | Sms Group Gmbh | Process for manufacturing a rolled product with optimized use of input materials |
Also Published As
Publication number | Publication date |
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RU2703009C2 (en) | 2019-10-15 |
EP3096896A1 (en) | 2016-11-30 |
DE102014224461A1 (en) | 2015-07-23 |
WO2015110310A1 (en) | 2015-07-30 |
JP6297159B2 (en) | 2018-03-20 |
KR20160105464A (en) | 2016-09-06 |
RU2016133849A (en) | 2018-03-02 |
US20170002440A1 (en) | 2017-01-05 |
CN106413931A (en) | 2017-02-15 |
CN106413931B (en) | 2019-10-15 |
JP2017511752A (en) | 2017-04-27 |
RU2016133849A3 (en) | 2018-03-02 |
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