Open Access Conference Proceedings

Abstract: In the continuous casting of steel, there is a variety of dynamic situations, both planned such as changing the steel grade, tundish replacement and unplanned such as breakout system interventions, equipment failure, etc. These situations cause variations of the casting parameters such as of the casting speed, casting temperature, intensity of cooling in the secondary cooling zone, etc. [..] Read more

Abstract: The surface roughness plays an important role during spray cooling of hot surfaces in a presence of the boiling. Bubbles are formed in small cavities on the surface during nucleate pool boiling. [..] Read more

Abstract: Metallurgy includes the oldest branch of technology and science of the humanity. Starting with discovering of the first metals till the actual nanostructures and special alloyed materials, the evolution of the metallurgy is fascinating.The ferrous metallurgy had a fast evolution during time. [..] Read more

Abstract: Presence of alkaline elements such as sodium and potassium are highly detrimental for blast furnace operations. Even a trace amount of alkali affects the performance of raw materials considerably. [..] Read more

Abstract: A monitoring system of tundish preheat process has been developed for the control of hydrogen content in molten steel at China Steel (CSC). The hydrogen gas accumulated inside the steel matrix may eventually induce pinholes or hydrogen-induced cracking. [..] Read more

Abstract: The paper deals with the study of thermo-physical properties of real tool steel grade. The work is focused mainly on phase transition temperatures, particularly liquidus and solidus temperatures determination. [..] Read more

Abstract: In this work there is presented the way how to improve the utility properties of steel cast by alloy layers application (on the base of alloy FeCrC) directly during the process of casting. The way how to forecast the thickness of the surface alloy layer on the cast with the use of simulation program Fluent was described. [..] Read more

Abstract: The solidification of liquid steel is generally accompanied with different phenomena, like solidification shrinkage and a change of the solubility limit of alloying elements. These phenomena are the base for negative side effects like micro- and macrosegregation as well as the formation of shrinkage cavity and gas porosity. [..] Read more

Abstract: Nowadays the efficient reclamation of used moulding sand is a vital part of foundries policies from both economical, technological and environmental-friendly points of view. The ability to use reclaimed sand of proper quality not only allows to save money that would have to be spent on new sand, it also allows the foundry to have smaller storage area and to reduce the negative impact on the environment caused by worn out moulding sand. [..] Read more

Abstract: The presented work presents the proposal, accomplishment and consequent evaluation of experiments based on the theoretical calculation and its comparison to the actually achieved level of chromium reduction from slag. The aim is reduction of chromium from slag with a high content of Cr2O3 with reducing agents of carbon in the form of anthracite and silicon in the form of ferroalloy FeSi. [..] Read more

Abstract: In the presented work, evaluation and further investigation of previously derived thermodynamic approach for calculation of surface tension of steel was done. Surface tension of pure iron and real steel grades was measured using the sessile drop method up to 1600 °C. [..] Read more

Abstract: The article focuses on the issue of boundary conditions for simulations of non-steady states in continuous casting machines. Numerical models of the temperature field of the continuously cast strand based on the finite difference method were implemented in off-line and on-line versions. [..] Read more

Abstract: The paper is devoted to verification of solidification of continuously cast round steel billets with a diameter 400 mm in the ProCAST simulation programme. The aim of numerical modelling realized under the conditions of the Department of Metallurgy and Foundry and Regional Materials Science and Technology Centre (RMSTC) at VSB-TU Ostrava is the optimization of the production of continuously cast steel in ArcelorMittal Ostrava a.s. [..] Read more

Abstract: This contribution delivers theoretical analysis of the process and relevant findings related to the above process. Design solutions on used metal sheet holders for forming are presented in this article. [..] Read more

Abstract: Ecological and economic reasons are forcing industry to improve efficiency and to save energy and resources. Especially for the automotive and transport industry – but also for all other industrial branches dealing with accelerated masses – lightweight design is a key issue for achieving this goal. [..] Read more

Abstract: Hot rolling of an alloy Al Mg3 was physically simulated by anisothermal uniaxial compression tests performed on the Hot Deformation Simulator HDS-20. The main aim of the research was to define the effect of the finish rolling temperature (in the range from 250 to 350 °C) on the structural and mechanical properties of the investigated alloy. [..] Read more

Abstract: The experimental material was a drawn and patented 3.4 mm diameter wire from C78DP steel. The wire was drawn from the diameter of 3.4 mm to 1.5 mm using a straight-through single-block KOCH KGT 25 – E wire drawing machine. [..] Read more

Abstract: The different schemes of resource-saving Thermomechanical Processing (TMP) based on the hot, hot-warm and cold deformation applied to various steels and alloys including sheets, bars and parts production are described. Structural and phase transformations in the course of TMP and their role in formation of structure and mechanical properties in the different cross section shape of billets and parts are presented. [..] Read more

Abstract: The paper presents application of multistage compression test for modelling of hot rolling of various steel products. To carry out these experiments multifunctional deformation simulators Gleeble of different types have been used. [..] Read more

Abstract: This article deals with the design of cooling systems for grooved rolls. The purpose is to extend the life of rolls by minimizing negative thermal stress during the rolling process. [..] Read more