Open Access Conference Proceedings

Abstract: Alkaline metals like sodium and potassium are generally known as unwanted elements in ironmaking processes. Beside the negative effects on refractory and coke consumption, alkalis have negative influence on the mechanical stability of the feed material. [..] Read more

Abstract: The paper was focused on search of causes of occurrence of internal and surface defects of continuously cast steel slabs. The relationships between types of defects given in literature and their occurrence in industrial practice were investigated, ensuing from preparation of the melt according to the specification of secondary metallurgy unit and equipment of the continuous casting machine. [..] Read more

Abstract: Induction heating is today wide used technology in industry in huge range of fields. Solution of this process contains both solution of the electromagnetic field and solution of the thermal field. [..] Read more

Abstract: The iron and steel metallurgy produces significant quantities of solid, liquid and gaseous wastes. The solid wastes like dusts, sludges and mill scales have been stored in dumping area due to their chemical composition, mainly by high content of zinc, cadmium, lead or organic compounds contamination. [..] Read more

Abstract: The paper devotes to verification of solidification of continuously cast round steel billets with a diameter 130 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 ArcelorMitall Ostrava a.s. [..] Read more

Abstract: The paper deals with the study of phase transitions temperatures (mainly solidus and liquidus) with use of different thermal analysis methods. The key thermal analysis methods are at the present days DTA (Differential Thermal Analysis), DSC (Differential Scanning Calorimetry) and “direct” thermal analysis. [..] Read more

Abstract: The paper is devoted to a discussion of the results obtained by the simultaneous use of three methods of thermal analysis in three different specialized devices with the aim to precise solidus and liquidus temperatures. The low carbon as-cast steel (130 mm round format) from Continuous Casting Machine No. [..] Read more

Abstract: CALPHAD-based calculations, for quite some time now, have been very useful and convenient way to obtain data needed for modelling of solidification process. Among scientists, interested in and working on the topic, knowledge of existence of software for thermodynamic calculations is widely spread, but at the same time its usage is limited. [..] Read more

Abstract: Steel treatment in the ladle in the secondary metallurgy units can be described as refining processes taking place between two non-mixable liquids representing metal and slag, namely under relative high temperatures. During refining processes, transmission process appears between metal and slag which has an impact on increasing of micro-cleanness and mainly on steel desulphurization representing an important transfer process. [..] Read more

Abstract: The paper presents research of possibilities of optimisation of production of tool steel of X40CrMoV5-1 grade for forging on the rapid forging machine, which was directed on conditions of casting with focus on macro-porosity and micro-porosity in the ingot body. Metallographic analyses of ingot structures prove that internal discontinuities in ingots may be formed as a result of volume changes of liquid and solid phases, of carbidic segregations and micro-cracks in segregations. [..] Read more

Abstract: The influence of Temperature-Strain-Time parameters at the Thermomechanical Processing (TMP) of austenitic, duplex and pearlitic structural steels on the mesostructure formation has been studied based on the laboratory, industrial experiments and TEM analysis. The fragmented dislocation substructure observed in steels with a different carbon, nitrogen, titanium, niobium content as well as recrystallization gave evidence that TMP effects the work-hardening and softening behaviour. [..] Read more

Abstract: The company of Vítkovice Heavy Machinery a. s. [..] Read more

Abstract: The urgency of a problem of calculation of the indicators of stress state is considered. The analysis the known methods of calculating the stress in the theory of metal forming was performed. [..] Read more

Abstract: The paper deals with three dimensional computer simulation of rolling process of plates with mushy zone. The model became a basis of a computer simulation system of soft reduction process, which is the final phase of continuous casting technology. [..] Read more

Abstract: The investigations into the hydromechanical bulge forming involved the use of copper tubes at the relative ratio so/D=0.04 (where so is the wall thickness and D is the tube diameter). The experimental results of bulge forming of axisymmetric components are presented. [..] Read more

Abstract: Problems of different lubricant types and their properties represent the very important parameter to successful manage production in automotive industry. Such reality is mainly important at production of press-shop itself as one part from the production chain. [..] Read more

Abstract: The cold roll bonding (CRB) of aluminium alloys to steel is a key industrial manufacturing process tool used to generate bimetallic composites for engine components. By joining steel and aluminium alloys in the solid state the desired mechanical bearing properties of both metals can be achieved; thus allowing for the superior tribological wear and strength characteristics observed in modern automotive bearings. [..] Read more

Abstract: Modern technology of bar rolling in many cases is based on the application of single or multiple longitudinal slitting, so-called Slit Rolling (SR). The slitting process uses special passes and guides to prepare, shape and separate the incoming billet into two or more individual strands, which will then be further rolled into finished sizes. [..] Read more

Abstract: The influence of Mn content on austenite recrystallization during roughing and early finishing of low C-high Nb-Ti steels has been investigated using multi-pass rolling simulations. Stress analysis was used to study the austenite softening behaviour. [..] Read more

Abstract: Today, ferrous metals includes large part of industry in the world although many non-ferrous metals and other materials discovered. Steel and cast iron are the important ferrous metals because of their mechanical, physical properties and behaviors. [..] Read more