Open Access Conference Proceedings

Abstract: The aim of the presented research was to experimentally evaluate the influence of coarse-grained sinter added to the sintering strands in order to increase productivity and decrease the economic demandingness of the sintering process. The research was carried out in a selected metallurgical enterprise in the Czech Republic where the share of output materials of the sintering process at different input proportions of coarse-grained sinter was measured during one year. [..] Read more

Abstract: The aim of the study was to determine the detection possibilities for corundum in slags. Corundum may be a harmful component in the secondary utilization of slag. [..] Read more

Abstract: The problem of environmental pollution due to increased industrial activity is the subject of attention in the country and around the world. The main purpose of waste management should be reclamation of valuable raw materials and, consequently, protection of natural environment by reducing consumption of deposits and energy. [..] Read more

Abstract: The main objective of waste management is the recovery of a valuable component (eg. metal, energy). [..] Read more

Abstract: Presented research focused on high silicon cast iron with 19% silicon content. The studies were conducted in two steps. [..] Read more

Abstract: Use of the control-steering systems in blast furnace technology contributes to the improvement of the quality of hot metal, which can be expressed by desirable and stable chemical composition and required temperature of hot metal at the tap. The paper presents the possibility of using artificial neural network as part of BF technology supporting system, and in particular its use to predict silicon, sulfur and phosphorus containing in hot metal. [..] Read more

Abstract: For the melting of mostly non-ferrous metals or for keeping metals in the liquid state crucible furnaces are often used. Greater use of crucible furnaces for steel and cast iron prevents the relatively high energy intensity of these furnaces. [..] Read more

Abstract: The characterization of non-metallic inclusions is of great importance for the production of metals and alloys. The precise determination of their size, abundance, shape and chemistry is of crucial interest to control and to improve production and quality of steel or other alloys. [..] Read more

Abstract: This article deals with production technology and secondary metallurgy processing of tool steels in electric steelworks of VÍTKOVICE HEAVY MACHINERY a.s. with the focus on thermal and slag regulation of heats. [..] Read more

Abstract: DSC method (Differential Scanning Calorimetry) is one of the thermal analysis methods which is suitable for studying the thermodynamic properties of metallic systems. In this work the heat capacities of real steel grade in the solid phase under strictly defined conditions for controlled heating were studied. [..] Read more

Abstract: This publication attempts to investigate the effect of heat treatment parameters on the impact strength of ADI. Ductile iron was tempered with isothermal transformation according to two variants. [..] Read more

Abstract: Series of thermal analysis measurements by Differential Thermal Analysis (DTA) and Direct Thermal Analysis (TA) were performed on two real grade medium carbon steel samples in low and high temperature regions. Temperatures of eutectoid transition (TE), end of α-ferrite to γ-austenite transition (Tα→γ), solidus (TS), peritectic transition (TP), liquidus (TL) were determined. [..] Read more

Abstract: In the presented paper, the results of laboratory experiments aimed at the study of chromium and the behaviour of its oxides, together with its reduction mechanism with the aid of silicon and carbon, are given. Experimental heats were aimed at the proposal of a theoretical calculation of consumption of chosen reduction agents, a reduction study under laboratory conditions at the application of alloyed steel with a chromium content of ca. [..] Read more

Abstract: Despite the development of steel making technologies a significant portion of deoxygenation reactions products remain in the molten metal until the time of casting. These ration products are referred to as non-metallic inclusions and their dimensions lower than 30 μm. [..] Read more

Abstract: The methods for determination liquidus (TL) and solidus (TS) temperatures in high-temperature region for selected steel grade were compared in the frame of this paper. The paper deals with discussion of the results obtained by the two different simultaneous methods of high-temperature thermal analyses (Direct Thermal Analysis and DTA) on the high-sophisticated specialized experimental systems (Netzsch STA 449 F3 Jupiter, Setaram SETSYS 18TM). [..] Read more

Abstract: Development of technologies for the production of the very fine structure is currently very intensively accelerated. Even in scientific research, it is recognized that precisely controlled forming processes, including special processes, enabling control of technological parameters with regard to the structure refinement, and tied with the strengthening of materials, currently had the highest gradient of utilization efficiency of the scientific research findings in practice. [..] Read more

Abstract: Computation of the springback phenomenon in numerical simulations, together with its prediction, is a very complex subject. Final results of the springback analysis are highly dependent on the initial FE settings. [..] Read more

Abstract: The paper is aimed at evaluation of effect previous plastic deformation on transformation kinetics of rail steel class IH alloyed with chromium. The CCT and DCCT diagrams were assembled on the basis of dilatometric tests with and/or without an influence of the previous deformation. [..] Read more

Abstract: The article describes the influence of a new ECAP forming tool draft (helix) for achieve a very fine grained structure of magnesium alloy AZ61. It was realized detailed measurements of hardness (HV) distribution and unconventional micro tensile tests for small samples (M-TT) after the individual passes through deformation route Bc. [..] Read more

Abstract: Prediction capability of a newly derived hot flow stress model is demonstrated on experimental flow curves of steel 38MnVS6. These flow curves were also described by the commonly used equations like Cingara & McQueen, JMAK or Hensel-Spittel. [..] Read more