JP6297159B2 - Method for producing metal steel alloys and / or iron alloys in hot and thick plate mills using optimized structure simulators, structure monitors and / or structure models - Google Patents

Description

The present invention relates to a method for the control of a metallurgical production facility for the production of products made of metallic steel alloys and / or iron alloys, the production process comprising at least partly a tissue simulator and / or Or controlled using a tissue monitor and / or tissue model, the tissue simulator, tissue monitor or tissue model being at least one mechanical strength property of a produced product containing a metal steel alloy and / or iron alloy A program for calculating at least one mechanical strength property depending on each series of processes and adjusting the calculated metal phase component and / or the product to be produced. is calculated based on the respective proportions of the metallic structure to be, hot series of process metallurgy production equipment has a final cooling section A metallurgical production facility parameter that depends on at least one mechanical strength property obtained, including a rolling mill and / or a plate mill, having at least partly preset and adaptable initial values Introduced into the calculation of at least one mechanical strength property.

  During the operation of the hot strip mill and / or the plate rolling mill, in addition to the deformation in the rolling mill, a winding temperature or a cooling stop temperature and a cooling rate are set as essential target values. This is because the mechanical strength properties of the resulting product can be largely adjusted. Therefore, changes in these parameters will inevitably surface changes in mechanical strength properties, which are ex post facto based on tensile tests on tensile samples taken from manufactured products. Can be detected. Each desired mechanical strength characteristic to be adjusted to the desired size is one of the essential goals of the rolling process. This is because these characteristics essentially (both) determine the prices that can be obtained in the market for the manufactured product. When a product is produced from a metal steel alloy and / or iron alloy in a metallurgical production facility, the mechanical strength properties of this product may be other (operational) such as rolling speed or final rolling temperature. Affected by parameters. Thus, a constant winding temperature does not necessarily guarantee a desired type of constant mechanical strength characteristics. The temperature of the manufactured product is directly measured online, for example using a pyrometer or other temperature measuring device, immediately after rolling or just before winding, and can therefore be used for direct control. However, mechanical strength properties are usually measured using a tensile test only with a large time lag and can therefore not be used directly for controlling each metallurgical process. Therefore, the set of preset process parameters or method parameters of the metal processing line and subsequent cooling section in the rolling mill does not necessarily comply with the desired mechanical (strength) characteristic target value. In addition, because these mechanical (strength) properties cannot be measured directly or directly, immediate correction of process parameters, method parameters or operating parameters of metallurgical equipment is not possible.

Therefore, also it has been developed prior art to your information, resulting mechanical strength values of the model and tissue models calculate online possible by providing an immediate effect on the operating parameters of the metal processing facility.

  Patent Document 1 discloses a similar method for controlling steel or aluminum metallurgical technical equipment, particularly in rolling mills. Here, in a metallurgical technical facility, steel or aluminum having material properties depending on the structure of steel or aluminum is produced from the input raw material, and these material properties depend on the operating parameters and the metallurgy depends on these operating parameters. Technical equipment is operated. Here, the operating parameters are determined depending on the desired material properties of the steel or aluminum using the structure optimization medium, where the material properties are the yield strength, strain limit, tensile strength of the steel or aluminum. It can be the fracture strain, hardness, transition temperature, anisotropy or strain hardening index.

  From US Pat. No. 6,047,089, a method is known for assisting at least partly manual control of a metal processing line in which a strip or slab or pre-contoured material is processed. Here, for a given part of the metal processing line, the proportion of at least one metallurgical phase of the metal takes into account the operating parameters of the metal processing line and / or the metal state parameters affecting the phase state. It is continuously calculated by calculation based on a model including a model for calculating the state, and the ratio of at least one phase is displayed to the operator for a predetermined portion of the metal processing line. Thus, for example, the ratios for ferrite, austenite, pearlite and cementite are displayed.

  Patent Document 3 uses a transition model for the cooling section of the rolling line, during which the transition model for the steel temperature and its metallurgical phase proportion along the strip is calculated in real time. Is disclosed. A control system is described in which the phase ratio of the steel strip wound in the winding device is kept constant. In addition, the following steps are set: In the first step, the degree of transition, ie a predetermined phase ratio, is calculated based on the data. In the second step, one or more parameters (control variables) of the cooling strategy, for the control of the introduction of the strip into the cooling section of the rolling line, the desired phase ratio of the cooled steel is taken up by the winding device. Adapted on-line to be held constant at The aim is to adhere to the required properties or material properties of the metal produced as accurately as possible.

  By direct calculation of the mechanical properties in the appropriate model, it is possible to set the process parameters with the maximum accuracy required for this. At this time, in steel, the phase proportions for austenite, ferrite, pearlite, bainite and martensite are essentially decisive for the mechanical strength properties obtained.

  Alloying elements are added to the steel material in order to obtain optimum mechanical strength properties of the products produced on the basis of the respective process and process conditions. The amount of alloying element to be added to each steel material is specifically directed to the desired mechanical strength properties in each application. Based on empirical testing, what each alloy element is, as it has not been possible until now to specifically predict the results regarding the mechanical strength properties of each steel product to be obtained by the addition of alloy elements It is necessary to calculate what influence the amount of has on the mechanical properties or mechanical strength properties of each fin product.

  A method for monitoring and controlling the quality of a rolled product based on a hot rolling process is known from Patent Document 4, and in this hot rolling process, formation conditions such as temperature and path reduction are online in the entire rolling process. Using the physical / metallurgical and / or statistical models that describe the entire rolling process and are connected to each other up and down based on this. Technical material properties, in particular yield strength, tensile strength and fracture strain, are calculated. By online detection of actual and current material properties, the expected material properties can be calculated by this method. At this time, especially the chemical analysis of each raw material is also identified and introduced into the physical / metallurgical austenitization and precipitation models. In addition, the heating time-temperature course change, rolling time-temperature course change and cooling time-temperature course required to comply with the required mechanical / technical material properties Is calculated and transmitted to the control system of the heating equipment, rolling equipment and cooling equipment. This ensures adherence to the required mechanical-technical material properties of the rolling process. Chemical target analysis of raw materials under the application of physical / metallurgical austenitization models, deformation models, recrystallization models, transition models, precipitation models, cooling models and material models by methods known from this document Production conditions are optimized and these are set for the newly used production quality. In this method, for example, the carbon content or manganese content of the material used is taken into account when calculating the strength properties, so that, based on this model, the influence of alloying elements on the mechanical strength properties of the resulting product is also affected. It is clear beforehand.

German Patent Invention No. 19881711 German Patent Application Publication No. 102007007560 International Publication No. 2005/099923 International Publication No. 98/18970

  The problem underlying the present invention is the production of operating parameters in a rolling line to obtain the desired mechanical strength properties of a product made of a metal steel or iron alloy, which is advantageous over previous methods. The object is to obtain a solution that allows adjustment of the metallurgical phase ratio in the product of time.

This object is achieved according to the invention in a method of the kind described in detail at the outset, as a metal steel alloy used and / or as an operating parameter of a metallurgical production facility introduced into the calculation of at least one strength property. Each mass fraction of at least one alloy element present in the chemical composition of the iron alloy, preferably all alloy elements, and another operating parameter are the cooling rate acting on the product, in particular during the manufacture of the product, preferably rolling. The cooling rate adjusted in the cooling performed after the process is detected and a consideration of the manufactured product that can be achieved or achieved by changing at least one further operating parameter, in particular by increasing the cooling rate. The improvement in strength characteristics is a mass fraction of one or more alloy elements with respect to the steel alloy of the metal used and / or the chemical composition of said iron alloy. The reduction in, is solved by at least partially correcting, and / or adjusted.

It is a graph which shows the monetary additional cost each required with respect to the change of the yield strength to a higher strength steel grade.

  Therefore, according to the present invention, only the mass fractions for the alloy media that are essential for at least the strength characteristics considered at least in the achieved cooling rate or other operating parameters, respectively, are obtained for each steel alloy and / or iron alloy. It is possible to optimize the use for the alloy medium as it exists in the chemical composition. Thus, the strength characteristics to be considered and achieved of the manufactured product are set, determined and adjusted, for example by the possible cooling rate or the adjusted cooling rate, while the chemical composition depends on this. Adapted.

  Thus, according to the present invention, the influence and contribution of each existing alloy element to the mechanical strength properties of the manufactured product is based on mixed crystal precipitation hardening caused by or affected by a plurality of mechanical elements. Is taken into account when calculating a general strength characteristic or at least one mechanical strength characteristic. The method according to the invention makes it possible to accurately calculate the influence of alloy elements on the mechanical strength properties. For example, if some manganese is added, this change is immediately calculated by a program stored in the tissue simulator and / or tissue monitor and / or tissue model, resulting in multiple mechanical products being manufactured. It is possible to identify the effect of this change on the strength characteristic or at least one mechanical strength characteristic.

With this knowledge, the operator can renew the cooling section of the rolling mill to improve the cooling rate, for example. This high cooling rate has an influence on the mechanical strength properties and can be used with purpose to change the mechanical strength properties. For this purpose, the tissue simulator and / or the tissue monitor and / or the tissue model provides the necessary information by means of programs stored in it. This program considers a higher cooling rate and calculates the change in strength characteristics obtained based on this. Thus, if the chemical analysis or composition of the alloy used is the same and the cooling rate is higher, other mechanical strength characteristics will occur or the mass fraction for fewer alloy elements, i.e. fewer alloy elements. The same mechanical strength characteristics with a rate or weight ratio are obtained, resulting in a cost reduction. This cost is quantified by a program stored in the tissue simulator and / or tissue monitor and / or tissue model, which determines at least one mechanical strength property of the manufactured product for each series of rolling mills. Depending on the process , the calculation is based on the calculated metallurgical phase components and / or their respective proportions for the adjusted metallurgical structure of the manufactured product.

Furthermore, the effect of the changed process parameters can be calculated by a stored program. For example, if the rolling line temperature or finish line temperature increases while the coiling temperature decreases at the same time, the memorized program calculates the necessary changes in process parameters or operating parameters and correspondingly the mechanical effects caused by this change. Calculate strength characteristics. Perform material development by optimal adjustment of process parameters, method parameters and / or operating parameters of a series of processes of metallurgical equipment including rolling mills with cooling zones to obtain the desired mechanical strength characteristics of the material To this end, the tissue simulator and / or tissue monitor and / or tissue model and programs stored therein provide new tools to the operator.

  In one embodiment, the invention provides that each detected mass fraction for the alloy element and / or each detected at least one other operating parameter, in particular each detected cooling rate, forms an evaluation criterion. Evaluation is based on a countable number of evaluation units. This in turn affects both the effects caused by changes in alloy composition and the effects caused by other operating parameters, particularly the cooling rate, on changes in the considered mechanical strength properties of the manufactured product. It is possible to assign a constant value.

  In another embodiment, the present invention provides for a direct comparison between different combinations of changes in the chemical composition of the steel alloy material and / or iron alloy material used and changes in the cooling rate. For each strength property considered, a combination of the mass fraction for the alloy element evaluated by the number of evaluation units that can be counted and another operating parameter, in particular the cooling rate, evaluated by the number of evaluation units that can be counted. Each sum of the countable evaluation units occurring in is calculated and / or represented using a program.

  It is reasonable if the program contains mathematical terms and / or algorithms that compare each number of evaluation units and / or the various calculated sums with each other so that evaluations to be compared can be performed. is there.

  In addition, the method according to the present invention also includes an assessment of the effect of alloy composition and cooling rate on the desired mechanical strength properties obtained, respectively. The evaluation is performed by an evaluation unit reflecting the evaluation standard, and the alloy composition and the cooling rate are evaluated by this evaluation unit. The evaluation unit can be of a technically quantitative type such as, for example, Δ strength improvement / Δ mass fraction of the total Δ strength improvement / Δ mass fraction of the alloy elements. However, as can be seen from FIG. 1, a cost, that is, a monetary value can be assigned to this evaluation unit. Here, the monetary additional costs (40.00 to 250.00 euros) required for each change in yield strength from a higher strength steel grade (S315MC to S650MC) are listed. Subsequently, various different combinations of alloy compositions and cooling rates can be compared with each other based on this assigned unit of evaluation. Then, the total value for each countable evaluation unit formed as a comparison value is selected (conventionally) in a convenient or appropriate manner (costly) for a given combination based on the alloy composition and the cooling rate. Can be used to The evaluation unit reflecting the evaluation standard may be, for example, an evaluation unit assigned to a currency unit or an evaluation unit. Then, it is possible to assign costs individually or in total to different cooling rates and different alloy compositions. This makes it possible for the method according to the invention to compare the influence of the cost of the alloy from the costs for the realization of the desired cooling rate, each with the costs incurred for achieving the desired mechanical strength properties It is. Therefore, according to the method according to the invention, it is possible to quantify the alloy costs for the adjustment of certain desired mechanical properties. Similarly, the cost for performing the cooling rate required to adjust the desired mechanical strength characteristics can be quantified. Since higher cooling rates strongly influence the mechanical properties of the resulting products as well as steel alloy or iron alloy alloy elements, the alloy changes with respect to changes in mechanical finishing properties by comparison with the method according to the invention Can be quantified. Thus, after modifying the existing cooling section with a higher, adjusted cooling rate, the value of the desired mechanical finishing characteristics can be improved. This improvement can be used for the reduction of the individual alloy elements of the alloy composition of the steel material and / or iron material used, thereby achieving a cost reduction for the overall method, This is due to the use of reduced quantities for one or more alloy elements. According to the present invention, such evaluation and evaluation are possible.

  These ratings and evaluations are possible in the present invention using a tissue model and / or tissue monitor and / or tissue simulator. In particular, the influence of each parameter is, in the sense according to the present invention, such an economic dependence or monetary dependence, as can be seen from FIG. 1, an organizational model and / or an organizational monitor and / or an organizational simulator. Can be quantified also in terms of currency using an evaluation unit that reflects the evaluation criteria. From FIG. 1 it can be seen that an increase in yield strength of about 100 MPa results in an additional cost of about 30.00 euros. For example, an increase in yield strength from steel S420MC to steel S500MC leads to a cost increase of 20 euros from 65.00 euros to 85.00 euros. This cost increase of 30.00 euros on average, in the above example 20.00 euros, is incurred during production on the rolling line in the form of addition of alloying elements or in the form of increased cooling rates for each steel strip. The increased cooling rate that is necessary is accompanied by a smaller ferrite grain size and thereby an improvement in the strength property “yield strength”. This relationship is stored in the tissue model according to the invention and can therefore be characterized quantitatively in the form of a correspondingly formulated and evaluated countable evaluation unit.

Thus, the operator of a metallurgical production facility can increase the higher cooling rate during the necessary cooling of the obtained product after the rolling process, for example by modifying the cooling zone, for example by increasing the cooling capacity. It can be done. Thus, this can achieve an improvement in strength, i.e. an improvement in the mechanical strength properties considered. The effect of improving the strength that appears due to the increased cooling rate can be used to obtain the opposite effect by changing the chemical composition of the steel alloy and / or iron alloy used. Depending on the method according to the invention and the program used at this time, the influence of the chemical composition of the alloy used, with the quantity proportions on the alloy elements changed and reduced, the mechanical properties to be obtained and considered in the resulting product It is possible to calculate the strength characteristics. This calculation is then repeated until the strength improvement caused by the increased cooling rate is reduced to zero, resulting in a strength improvement caused by the increased cooling rate or an increase in the mechanical strength property value. And the original value of the mechanical strength characteristic exists again. At this time, the cost reduction caused by the reduction of the alloy elements compensates for the necessary cost increase by the increased cooling rate. About 0.07% C, 0.7% Mn, 0.2% Si, 0.04% Nb, 0.084% Ni, 0.034% Mo, 0.084% Cr, For a typical fine grained steel alloyed with Nb with 0.0084% V and 0.0084% Ti, this is about 4% of the alloy cost, typically 30.00 Euro / t. Is reduced by the reduced alloy content, so that the alloy cost is reduced to 28.80 euro / t in this example. Therefore, when operating a metallurgical production facility that produces 1 million tonnes per year, it is possible to reduce approximately 1.2 million euros per year for alloy costs for such fine-grained steel.

  The method according to the invention makes it possible to calculate the possible savings for each material by reducing the amount of alloying elements used. At this time, a material with a large alloy proportion provides a high saving potential, a small alloy proportion and correspondingly a small potential. The metallurgical production facility considered if the alloy costs for each material considered, i.e. each steel alloy and / or iron alloy considered, are known by the method according to the invention or the program stored therein. It is possible to calculate the saving potential for the overall annual production of

  In order to take into account the influence of alloying elements on the yield strength as one mechanical strength property of the resulting product, the present invention further relates to the steel alloy of the metal used, on the yield strength of the manufactured product. And / or the program includes mathematical terms and algorithms that reflect the effect of mass fraction on the alloy elements in the chemical composition of the iron alloy.

  Then, particularly in an advantageous embodiment of the invention, the term is

を有している。この方程式において、Ｃ_ｉはそれぞれ異なる合金要素ｉの質量％での割合であり、Ａ_ｉ及びＢ_ｉは試験による検査によってあらかじめ特定されるそれぞれ対応する回帰係数であり、ＹＳは降伏強さ（Ｙｉｅｌｄ Ｓｔｒｅｎｇｔｈ）であり、その変化（Δ）が算出される。回帰係数は一連の試験に基づいて算出され、これら試験においては、鋼合金及び／又は鉄合金の合金要素としての炭素（Ｃ）、ケイ素（Ｓｉ）、マンガン（Ｍｎ）、クロム（Ｃｒ）、モリブデン（Ｍｏ）、ニッケル（Ｎｉ）、バナジウム（Ｖ）、窒素（Ｎ）、銅（Ｃｕ）、アルミニウム（Ａｌ）、ニオブ（Ｎｂ）、チタン（Ｔｉ）及びリン（Ｐ）の影響が考慮され、試験的な測定データが回帰係数の算出のために存在する／したか、あるいは既知である。

have. In this equation, C _i is the percentage by mass% of different alloy elements i, A _i and B _i are the corresponding regression coefficients specified in advance by inspection by testing, and YS is the yield strength (Yield). Strength) and the change (Δ) is calculated. The regression coefficient is calculated based on a series of tests. In these tests, carbon (C), silicon (Si), manganese (Mn), chromium (Cr), molybdenum as alloy elements of steel alloys and / or iron alloys. (Mo), Nickel (Ni), Vanadium (V), Nitrogen (N), Copper (Cu), Aluminum (Al), Niobium (Nb), Titanium (Ti) and Phosphorus (P) Measured data exists / has been known for calculating regression coefficients or is known.

  Furthermore, it is advantageous if, after the transfer, the particle size finally adjusted in the manufactured product can be similarly calculated by a program stored in the tissue simulator and / or tissue monitor and / or tissue model. . This is because the particle size corresponds to the Hall Petch relationship of influence on mechanical strength characteristics. Thus, in one embodiment, the present invention provides an equation for the effect of the ferrite grain size (d) of the ferrite structure formed during the final cooling of the product on the term that the program forms yield strength.

の形態で含んでいる。相構成要素及び合金要素の計算のほかに、転移された金属の粒径を計算することも重要である。フェライト粒径は、得られる機械的な強度特性への決定的な影響を有している。なぜなら、粒径の低減によって、ホールペッチの関係により強度特性「降伏強さ」の上昇ΔＹＳが期待され得るためである。上記方程式においては、ｄはフェライト粒径であり、Ａは回帰パラメータであり、ＹＳは降伏強さ（Ｙｉｅｌｄ Ｓｔｒｅｎｇｔｈ）であり、その変化（Δ）が算出される。

In the form of In addition to calculating the phase component and alloy elements, it is also important to calculate the grain size of the transferred metal. The ferrite grain size has a decisive influence on the mechanical strength properties obtained. This is because an increase ΔYS in the strength characteristic “yield strength” can be expected due to the Hall Petch relationship due to the reduction in particle size. In the above equation, d is the ferrite grain size, A is the regression parameter, YS is the yield strength, and the change (Δ) is calculated.

Since the ferrite grain size formed depends on each cooling rate, the present invention further allows the program to account for the effect of the cooling rate on the ferrite grain size (d _a ) of the ferrite structure formed during the final cooling of the product. equation

の形態で含むようになっている。ここで、ｄ_ａはフェライト粒径であり、Ａ_ｉは実験的係数（ｉ＝１，２，・・・）、Ｃ_ｅｑは炭素当量であり、ｄ_ｙはオーステナイト粒径であり、εは残留硬化であり、ＣＲは冷却率である。これに基づき、より高い冷却率がより小さなフェライト粒径につながることが明らかである。製造時には、通常、できる限り大きな強度を有する材料を生産すること、及びできる限り小さなフェライト粒径を調整する目的を追求するものである。フェライト粒径は、冷却率あるいは冷却速度によって決定的に影響を受け、この冷却率あるいは冷却速度は、通常、圧延ライン及びこれに伴う製造される製品の圧延プロセスを締めくくる冷却区間において使用可能な冷却容量に応じて調整されることが可能である。

It comes to include in the form of. Here, _{d a} is the ferrite grain size, _{A i} experimental coefficient _{(i = 1,2, ···),} C eq is the carbon equivalent, _{d y} is the austenite grain size, epsilon residual Curing, CR is the cooling rate. Based on this, it is clear that higher cooling rates lead to smaller ferrite grain sizes. At the time of manufacture, the aim is usually to produce a material with as much strength as possible and to adjust the ferrite grain size as small as possible. Ferrite grain size is critically affected by the cooling rate or rate, which is usually the cooling available in the cooling line that concludes the rolling process of the rolling line and the resulting product. It can be adjusted according to the capacity.

In general, mechanical strength characteristics cannot be measured in modern times, so that according to the present invention, a model including a tissue simulator and / or tissue monitor and / or a tissue model is used, and these tissue simulator and / or tissue monitor and The structure model includes a program for calculating at least one mechanical strength property of a manufactured product comprising a steel alloy and / or an iron alloy of a metal, which program includes Depending on each series of processes , at least one mechanical strength property is calculated based on the calculated metallurgical phase components and / or their proportions for the adjusted metallurgical structure of the manufactured product To do. Such a model is the so-called MPC (Mechanical Property Calculator) program, which depends on the process conditions in the entire process sequence consisting of furnace, rolling line and cooling section. Is to determine. This makes it possible to set a new target value for the winding temperature or the cooling rate. In addition, this model is suitable for control purposes in the trim water zone. As the control amount, it is possible to use the yield strength or tensile strength after cooling. This model calculates the process parameters required for setting this set value. The results are immediately visible and updated in new periodic calculations. The core of the MPC program is the calculation of the mechanical strength properties of the produced material after cooling. This calculation is performed by a semi-empirical equation. Calculations are made for the various deposition elements of the strip or plate. The strip or plate is thus divided into small elements. During the calculation, process quantities such as roller speed and roller temperature are taken into account. These are immediately introduced to new calculations when changed. The result is a distribution of mechanical (strength) properties in the strip or plate.

  The basis for the calculation of the mechanical (strength) properties is the calculation of the phase component of the material produced. For this purpose, the exact cooling course of the metal is calculated, and the decay of austenite is modeled into components that are ferrite, pearlite, bainite and martensite based on this cooling curve that is again influenced by the metallurgical structure transition. There is a need. When using this model in this model for the calculation of mechanical (strength) properties, it is necessary to match the measured values to ensure a good prediction of the mechanical (strength) properties. is there. Therefore, the value calculated using the model is compared with the value calculated based on the tensile sample, and there may be a significant correlation between the calculated value and the measured value with small variations in the measured value. It can be confirmed. This coincidence occurs in various equipment types (hot steel line, plate line and continuous casting equipment, especially CSP equipment).

It is possible to analyze and optimize the actual production situation or process situation by calculation in the MPC model. Thus, improvements in the alloy concept can reduce the cost for alloy elements. This is because the cost-use ratio can be calculated. Accordingly, the present invention is, operating parameters, using a program, at least, is also characterized to be optimized with respect to at least one mechanical strength properties are achieved. This method according to the invention makes it possible to calculate the strength characteristics of a product to be manufactured having a predetermined chemical composition. For example, when operating parameters such as load distribution in the finishing line (rolling), final rolling temperature, cooling strategy or winding temperature change, the resulting mechanical strength characteristics change. The program used during the execution of the method according to the invention optimizes the adjusted operating parameters or the operating parameters to be adjusted and thus determines the best intensity characteristics.

  Furthermore, the effect of the improved equipment technology can be taken into account, for example an increased maximum rolling load or an increased maximum cooling rate or the like. This improved production condition allows for the achievement of improved (strength) properties of the material or reduced costs during its manufacture. Therefore, it is possible to promote material development by optimally adjusting the process parameters in the rolling mill and the cooling section with respect to the set requirements.

The operating parameters in the individual processing steps of the series of processes in the steel mill, rolling mill and cooling section are individually determined in the individual processing steps by means of the program used in the method according to the invention for the desired mechanical strength properties. The tissue change is calculated, and based on this, the tissue having the optimum characteristics can be repeatedly identified to be optimized. This can optimize conventional processes or accelerate the development and production of new materials. This can save considerable costs in material development.

  In addition, large converters often result in raw materials or slabs that need to be partially (intermediate) stored in terms of small order quantities or small lot sizes. This leads to large inventory with corresponding storage costs. With the method according to the invention, it is possible to process slabs of the same analysis, i.e. slabs of the same chemical composition but different production parameters, and adjusted to different intensity characteristics based on different production parameters or operating parameters. This can be done by applying the corresponding iterative method, in which the possible mechanical strength properties that can be achieved are calculated by the program used in the method according to the invention. In this way, inventory can be reduced, or storage costs can be reduced and economy can be increased.

  Furthermore, according to the present invention, each calculated at least one mechanical strength characteristic is displayed on-line at the control station of the metallurgical production facility, so that each of the currently adjusted mechanical strength characteristics is displayed. Online (visual) visualization of strong (strength) properties. This allows manual intervention by information notification and status notification and leads to a slight production loss.

  In addition, automatic control of target intensity characteristics can be used. This makes it possible to deal with the field in real time and to optimize another production course so that at least one desired mechanical strength characteristic is obtained. This is done by automatic correction of at least some or several method parameters in the rolling mill and the cooling zone. Therefore, the characteristic distribution is uniform over the strip length or the plate length. Thus, the present invention further uses the calculated at least one mechanical strength characteristic to control a plurality of operating parameters of the metallurgical production facility so that the desired at least one mechanical strength characteristic is automatically It is characterized by being operated. If preset target operating parameters (eg, preset final rolling temperature) are not observed, for example due to operating disturbances, the set mechanical strength characteristics may no longer be achieved. In such a case, in the method according to the invention, the program performs the calculation with the respective currently measured values / data and still other parameters (so that the desired mechanical target strength characteristic is achieved. For example, the cooling strategy and the winding temperature are changed. Therefore, the mechanical strength characteristics are automatically controlled.

The present invention relates to a production process in which a material containing steel or iron is cooled in the production of strips and plates of metal and steel alloys, in rolling mills, for example hot rolling mills and plate rolling mills, In particular, it can be used or applied in all locations of the hot rolling line and the thick plate line. Preferably, the metallurgical equipment for carrying out the method according to the invention comprises a hot rolling mill and / or a plate mill, in which the hot rolling mill and / or the plate rolling mill: Any number of pre-working frameworks and frameworks that can be divided into one or more finishing frameworks are subjected to furnace-based deformation in any number, and then the deformed material is taken up in the cooling zone at the coiling temperature. Or it cools to the cooling stop temperature. The present invention further provides that the metallurgical production facility comprises a series of processes including a furnace, a rolling mill, in particular a hot rolling mill and / or a plate rolling mill, and a cooling section, and a metallurgical technique. It is characterized in that the operating parameters of a whole series of processes of a typical production facility are introduced into the program.

However, it is also possible for the production facility by metallurgical technology to include a steelmaking machine and / or a continuous casting facility which are also included by means of a structure simulator and / or structure monitor and / or structure model forming so-called level 3 tools. Finally, the present invention provides a metallurgical production facility that includes, and includes, a range in which a metal steel alloy and / or iron alloy exists in a molten liquid state, in particular a steelmaking machine and / or a continuous casting facility. The operating parameters of the entire series of technical production facilities are also introduced into the program.

Overall, the present invention provides the following advantages:
・ Optimization of alloy costs by improved alloy concept ・ Material development by optimal adjustment of process parameters ・ Real-time visualization of mechanical properties-Visualization and display of information notification ・ Multiple or at least one mechanical strength property fully automatic Real-time control and organization simulator and / or organization monitor and / or organization model can be used to reduce running costs and quantitatively determine the benefits of investment costs.

Claims (10)

A method for controlling a metallurgical production facility for the manufacture of products made of metallic steel alloys and / or iron alloys, the manufacturing process being at least partly a tissue simulator and / or tissue monitor and / or Controlled using a tissue model, the tissue simulator, tissue monitor or tissue model is a program for calculating at least one mechanical strength characteristic of a produced product containing said steel alloy and / or said iron alloy of metal Using the program, the at least one mechanical strength property depends on each series of processes , and the calculated metal phase component and / or the adjusted metal of the manufactured product is calculated based on the respective proportion of the organization, including the rolling mill a series of processes metallurgical technical said production facility has a final cooling section A parameter of said metallurgical production facility on which at least partly preset and adaptable initial values depend on at least one mechanical strength property obtained depends on at least one mechanical strength property In the method introduced into the calculation,
As operating parameters of metallurgical technological said production facility to be introduced into the calculation of at least one of the strength properties of at least one alloying element present in the chemical composition of the steel alloy and / or the iron alloy of the metal used Each mass fraction and, as another operating parameter, at least one cooling rate occurring in the cooling performed after the rolling process is detected , the detected mass fraction for the alloy element and the detected each The cooling rate is evaluated by the countable number of evaluation units forming the evaluation criteria, and then for each considered strength property, the mass fraction for the alloying elements evaluated by the number of said evaluation units that can be counted and Each of the countable evaluation units occurring in combination with the cooling rate evaluated by the number of the evaluation units countable Strength meter is, the calculated using the program, and / or by being represented by at, at least in or by the change of the cooling rate can be achievement or is achieved, it will be discussed in the products produced The improvement in properties is at least partly corrected and / or adjusted by reducing the mass fraction of one or more of the alloy elements with respect to the chemical composition of the steel alloy and / or the iron alloy of the metal used It is the fact, before Symbol program to contain mathematical terms and / or algorithm comparing each number and / or different total value calculated in the evaluation unit with each other, and, subsequently, was prepared One or more of the considered strength properties to be achieved of the product are adjusted to the cooling rate and the chemical composition of the metal steel alloy and / or iron alloy used, depending on this adjustment. of Wherein the determined serial and adaptation of the mass fraction of the alloy elements by.   The program includes mathematical terms and algorithms that reflect the influence of the mass fraction for the alloy elements on the chemical composition of the steel alloy and / or iron alloy of the metal used on the yield strength of the manufactured product. The method of claim 1 wherein: The term is an equation

Where C _i is the percentage by mass% of each different alloy element i, A _i and B _i are the corresponding regression coefficients specified beforehand by inspection by testing, and ΔYS is the yield strength the method of claim 2, wherein the der change Rukoto. The program describes the effect of the ferrite grain size (d) of the ferrite structure formed during the final cooling of the product on the terms that form the yield strength.

The contains the form, d is ferrite grain size, A is the regression parameters, DerutaYS is according to any one of claims 1 to 3, wherein the change in der Rukoto yield strength Method. The program represents the effect of the cooling rate on the ferrite grain size (d _a ) of the ferrite structure formed during the final cooling of the product.

Where d _a is the ferrite grain size, A _i is the experimental coefficient (i = 1, 2,...), C _eq is the carbon equivalent, and _dy is the austenite grain size , epsilon is a residual hardening, CR a method according to claim 1, wherein a cooling rate der Rukoto.   6. A method according to any one of claims 1 to 5, characterized in that the operating parameters are optimized with respect to at least one mechanical strength property to be achieved using the program.   7. A method according to any one of the preceding claims, characterized in that each calculated at least one mechanical strength property is displayed on-line at a control station of a metallurgical production facility. A plurality of operating parameters of the metallurgical production facility are controlled using the calculated at least one mechanical strength characteristic, and the desired at least one mechanical strength characteristic is automatically controlled. The method according to any one of claims 1 to 7. The metallurgical production facility comprises a series of processes including a furnace , a rolling mill , and a cooling section, and operating parameters of the entire series of processes of the metallurgical production facility are the program. The method according to claim 1, wherein the method is introduced into the method. Metallurgical Technical the production equipment, said steel alloy and / or the iron alloy of the metal comprises range present in the form molten liquid, and the entire set of processes metallurgical technical said production equipment comprising said range The method according to claim 1, wherein the operating parameters are introduced into the program.

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