Karel Michalek
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View article: Physical Experiments and Numerical Simulations of the Influence of Turbulence Inhibitors and the Position of Ladle Shroud on the Steel Flow in an Asymmetric Five-Strand Tundish
Physical Experiments and Numerical Simulations of the Influence of Turbulence Inhibitors and the Position of Ladle Shroud on the Steel Flow in an Asymmetric Five-Strand Tundish Open
The submitted article deals with the use of physical and numerical modelling to study the process of the steel flow in an asymmetric five-strand tundish that continuously casts steel. For the purposes of physical modelling, a 1:4-scale ple…
View article: The Influence of Optimization Parameters on the Efficiency of Aluminium Melt Refining by using Physical Modelling
The Influence of Optimization Parameters on the Efficiency of Aluminium Melt Refining by using Physical Modelling Open
The article describes the influence of optimization parameters on the efficiency of aluminium melt refining by using physical modelling. The blowing of refining gas, through a rotating impeller into the ladle is a widely used operating tec…
View article: USE OF THE THERMODYNAMIC DATABASE COMPUTHERM TO CONSTRUCT A REGRESSION EQUATION TO DETERMINE THE LIQUIDUS TEMPERATURE OF 41Cr4 STEEL
USE OF THE THERMODYNAMIC DATABASE COMPUTHERM TO CONSTRUCT A REGRESSION EQUATION TO DETERMINE THE LIQUIDUS TEMPERATURE OF 41Cr4 STEEL Open
The subject of this paper is the analysis of phase transformation temperatures, specifically liquidus temperature (TL) for steel quality 41Cr4.To calculate the temperatures, 66 different variants of the chemical composition of a given stee…
View article: EFFECT OF TEMPERATURE CHANGE ON THE STEEL FLOW IN THE FIVE-STRAND ASYMMETRIC TUNDISH USING NUMERICAL MODELLING
EFFECT OF TEMPERATURE CHANGE ON THE STEEL FLOW IN THE FIVE-STRAND ASYMMETRIC TUNDISH USING NUMERICAL MODELLING Open
Numerical modelling is becoming an essential part of research in the field of steel metallurgy at present.In numerical modelling, the operating equipment is replaced by a mathematical model, which consists of a system of partial differenti…
View article: Modelling of Technological Parameters of Aluminium Melt Refining in the Ladle by Blowing of Inert Gas through the Rotating Impeller
Modelling of Technological Parameters of Aluminium Melt Refining in the Ladle by Blowing of Inert Gas through the Rotating Impeller Open
The presented paper deals with the use of physical modelling to study the degassing process of aluminium melts in the refining ladle by blowing inert gas through a rotating impeller. For the purposes of physical modelling, a plexiglass mod…
View article: Determination of phase transformation temperatures of 20MnCr5 steel using CompuTherm thermodynamic database and design of regression equations
Determination of phase transformation temperatures of 20MnCr5 steel using CompuTherm thermodynamic database and design of regression equations Open
The paper presents analysis of phase transformation temperatures of 20MnCr5 steel.For calculations of required temperatures, i.e. liquidus temperature (TL) and solidus temperature (TS) was used CompuTherm thermodynamic database.The aim of …
View article: Thermodynamic Analysis of CaO - SiO2 - Al2O3 - MgO slag system
Thermodynamic Analysis of CaO - SiO2 - Al2O3 - MgO slag system Open
The paper deals with the possibility of thermodynamic analysis of CaO -SiO2 -Al2O3 -MgO slag system for optimizing of steel desulphurization in a ladle.From the point of view of reducing the sulphur content in steel, the chemical compositi…
View article: Numerical Analysis of RTD Curves and Inclusions Removal in a Multi-Strand Asymmetric Tundish with Different Configuration of Impact Pad
Numerical Analysis of RTD Curves and Inclusions Removal in a Multi-Strand Asymmetric Tundish with Different Configuration of Impact Pad Open
To effectively remove non-metallic inclusions from the steel during the flowing in a five-strand asymmetric tundish, the novel configuration of the impact pad was developed. For analysis, complex numerical modelling in the programme ANSYS …
View article: Numerical Modelling of Metal Melt Refining Process in Ladle With Rotating Impeller and Breakwaters
Numerical Modelling of Metal Melt Refining Process in Ladle With Rotating Impeller and Breakwaters Open
The paper describes research and development of aluminium melt refining technology in a ladle with rotating impeller and breakwaters using numerical modelling of a finite volume/element method. The theoretical aspects of refining technolog…
View article: Implementation of method of Design of experiment into process of recommendation of liquidus and solidus temperatures of ingot cast steel grades
Implementation of method of Design of experiment into process of recommendation of liquidus and solidus temperatures of ingot cast steel grades Open
View article: NUMERICAL MODELLING OF BLAST FURNACE GAS FLOW IN WATER SEPARATOR
NUMERICAL MODELLING OF BLAST FURNACE GAS FLOW IN WATER SEPARATOR Open
View article: PHYSICAL MODELLING OF MELT DEGASSING IN THE REFINING LADLE
PHYSICAL MODELLING OF MELT DEGASSING IN THE REFINING LADLE Open
View article: Development of a monitoring method of hydrogen removal from aluminum melt using numerical simulation
Development of a monitoring method of hydrogen removal from aluminum melt using numerical simulation Open
View article: Physical Modelling of Degassing Process by Blowing of Inert Gas
Physical Modelling of Degassing Process by Blowing of Inert Gas Open
This paper deals with the possibilities of using physical modelling to study the degassing of metal melt during its treatment in the refining ladle. The method of inert gas blowing, so-called refining gas, presents the most common operatio…
View article: Evaluation of Approaches of Numerical Modelling of Solidification of Continuously Cast Steel Billets
Evaluation of Approaches of Numerical Modelling of Solidification of Continuously Cast Steel Billets Open
The paper evaluates two approaches of numerical modelling of solidification of continuously cast steel billets by finite element method, namely by the numerical modelling under the Steady-State Thermal Conditions, and by the numerical mode…
View article: Physical Modelling of Tundish Slag Entrainment under Various Technological Conditions
Physical Modelling of Tundish Slag Entrainment under Various Technological Conditions Open
This paper deals with the issue of physical modelling of vortexes creation and tundish slag entrainment over the mouth of the nozzle into the individual casting strands. Proper physical model is equivalent to the operational continuous cas…
View article: Research and Development of the Solidification of Slab Ingots from Special Tool Steels
Research and Development of the Solidification of Slab Ingots from Special Tool Steels Open
The paper describes the research and development of casting and solidification of slab ingots from special tool steels by means of numerical modelling using the finite element method. The pre-processing, processing and post-processing phas…
View article: Determination of solidus and liquidus temperatures for bearing steel by thermal analysis methods
Determination of solidus and liquidus temperatures for bearing steel by thermal analysis methods Open
The first part of presented paper is devoted to comparison of solidus and liquidus temperatures determined by two methods of thermal analysis for one real steel grade 100CrMo7. Two modern devices for high-temperature analysis were used. Th…
View article: Study of macro-segregations in a continuously cast billet
Study of macro-segregations in a continuously cast billet Open
This paper is devoted to the study of macro-segregations on the longitudinal section of a continuously cast billet 0 160 mm destined for the production of seamless pipes. Its evaluation comprised a visual inspection of macro-etching, micro…
View article: Distribution of porosity and macrosegregation in slab steel ingot
Distribution of porosity and macrosegregation in slab steel ingot Open
The paper presents a new knowledge and experiences with verification and optimization of production technology of heavy slab ingot weighing 40 t from tool steel using the results of numerical modelling and of operational experiments at a s…
View article: Study of Tundish Slag Entrainment Using Physical Modelling
Study of Tundish Slag Entrainment Using Physical Modelling Open
This paper deals with the possibilities of using physical modelling to study the slag entrainment in the tundish. A level of steel in the tundish is changing during sequential continuous casting. The most significant decrease in the steel …
View article: Study of Solidification of Continuously Cast Steel Round Billets Using Numerical Modelling
Study of Solidification of Continuously Cast Steel Round Billets Using Numerical Modelling Open
The paper is dedicated to the verification of solidification of continuously cast round steel billets using numerical modelling based on the finite element method. The aim of numerical modelling is to optimize the production of continuousl…
View article: Impact of Oscillation Parameters on Surface Quality of Cast Billets
Impact of Oscillation Parameters on Surface Quality of Cast Billets Open
The paper is focused on impact of different oscillation parameters on surface quality of peritectic steel grades cast into billets 150x150 mm. Hydraulic oscillation used for this purpose was temporarily installed on one strand of the bille…
View article: Prediction of qualitative parameters of slab steel ingot using numerical modelling
Prediction of qualitative parameters of slab steel ingot using numerical modelling Open
The paper describes the verification of casting and solidification of heavy slab ingot weighing 40 t from tool steel by
\nmeans of numerical modelling with use of a finite element method. The pre-processing, processing and post-processing
…
View article: Influence of Direct Thermal Analysis Experimental Conditions on Determination of the High Temperature Phase Transformation Temperatures / Wpływ Warunków Prowadzenia Bezpośredniej Analizy Termicznej Na Określenie Temperatur Wysoko Temperaturowych Przemian Fazowych
Influence of Direct Thermal Analysis Experimental Conditions on Determination of the High Temperature Phase Transformation Temperatures / Wpływ Warunków Prowadzenia Bezpośredniej Analizy Termicznej Na Określenie Temperatur Wysoko Temperaturowych Przemian Fazowych Open
Thermo-physical and thermodynamic properties of metallic systems represent some of the most important data that allows to describe their behaviour under strictly specified conditions. These data are the basic, input data for simulative pro…
View article: Study of Casting and Solidification of Slab Ingot from Tool Steel Using Numerical Modelling / Modelowanie Numeryczne Odlewania I Krzepnięcia Wlewków Stalowych Ze Stali Narzędziowej
Study of Casting and Solidification of Slab Ingot from Tool Steel Using Numerical Modelling / Modelowanie Numeryczne Odlewania I Krzepnięcia Wlewków Stalowych Ze Stali Narzędziowej Open
The main problem in the production of forgings from tool steels, especially thick plates, blocks, pulleys and rods which are used for special machine components for demanding applications, it is the inhomogeneous structure with segregation…
View article: Physical Modelling Of The Steel Flow In RH Apparatus
Physical Modelling Of The Steel Flow In RH Apparatus Open
The efficiency of vacuum steel degassing using RH methods depends on many factors. One of the most important are hydrodynamic processes occurring in the ladle and vacuum chamber. It is always hard and expensive to determine the flow charac…