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Conference Proceedings - METAL 2015
24th International Conference on Metallurgy and Materials
June 3rd - 5th 2015 / Hotel Voronez I, Brno, Czech Republic, EU
www.metalconference.eu
ISSN: 2694-9296
ISBN: 978-80-87294-58-1
Proceedings of the conference were published in Web of Science and Scopus.
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Kvackaj Tibor Department of Metal Forming, Faculty of Metallurgy, Technical University in Kosice, Kosice, Slovakia, EU, tibor.kvackaj@tuke.sk
Abstract:
Theoretical approaches of hot plastic deformations by rolling with the aim of structure formation are discussed. The influence of reheating conditions as are reheating temperature and holding time on reheating temperature on diameter of grain size is presented. [..]
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JEZIERSKI Jan Silesian University of Technology, Faculty of Mechanical Engineering, Department of Foundry Engineering, Towarowa 7, 44-100 Gliwice, Poland, jan.jezierski@polsl.pl, krzysztof.janerka@polsl.pl
Co-authors:
JANERKA Krzysztof
Abstract:
Many metallurgical processes in some moment needs that the specific material in form of chunks, grains, powder, dust etc. must be added. [..]
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STAWARZ Marcin Silesian University of Technology, Faculty of Mechanical Engineering, Department of Foundry Engineering, Gliwice, Poland, EU, marcin.stawarz@polsl.pl
Co-authors:
GROMCZYK Malwina
JEZIERSKI Jan
JANERKA Krzysztof
Abstract:
The high silicon cast iron is a very attractive material because of its corrosion and abrasion resistance and also the ability to work at high temperature. The additional advantage of this material is the low production cost. [..]
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GAUDE-FUGAROLAS Daniel dgaude Prime Innovation SLU, c/. Alcalde Joan Batalla, 4, 08340 Vilassar de Mar, Spain, EU, dgaude@cantab.net
Abstract:
Hydrogen may cause severe degradation on some high strength alloys, and although research efforts have intensified in recent years, our understanding of such phenomena still has room for improvement. For the metallurgical industry it would be useful to have applicable criteria able to predict the risk of hydrogen embrittlement and therefore be able to prevent embritlement damage to industrial products. [..]
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TKADLEČKOVÁ Markéta VŠB-Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Department of Metallurgy and Foundry, and Regional Materials Science and Technology Centre, Ostrava-Poruba, Czech Republic, EU, marketa.tkadleckova@vsb.cz, karel.michalek@vsb.cz
Co-authors:
MICHALEK Karel
MACHOVČÁK Pavel
Abstract:
The main problem in production of forgings from tool steels, especially in the form of thick plates, blocks, and rods which are used for special machine components for demanding applications, is the inhomogeneous structure with segregations, cracks in segregations or complex type of non-metallic inclusions of MnS and TiCN type. These forgings are actually produced from conventional forging ingots. [..]
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KARALIS Konstantinos School of Mining Engineering and Metallurgy, National Technical University of Athens, Zografou Campus, Athens, Greece, EU, kkaral@metal.ntua.gr
Co-authors:
KARKALOS Nikos
ANTIPAS G.S.E.
XENIDIS Anthimos
Abstract:
A three-dimensional mathematical model has been developed in order to describe the electromagnetic phenomena in an Electric submerged Arc Furnace (EAF). From the electromagnetics differential equations solution, the current density, Lorentz force and Joule heating was investigated in connection with the slag’s electrical conductivity values. [..]
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KLIMEŠ Lubomír Brno University of Technology, Faculty of Mechanical Engineering, Brno, Czech Republic, EU, klimes@fme.vutbr.cz, mauder@fme.vutbr.cz, stetina@fme.vutbr.cz
Co-authors:
MAUDER Tomáš
ŠTĚTINA Josef
Abstract:
The paper presents the use of a solidification model coupled with control algorithms for optimization of secondary cooling. The solidification model provides data to control algorithms, which evaluate an actual thermal state of a strand and control casting parameters such as cooling intensity in secondary cooling zone. [..]
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Hassan A.I. National University of Science and Technology (MISiS), Moscow, Russian Federation
Co-authors:
Kotelnikov G. I.
Semin A. E.
Megahed G. M.
Abstract:
Traditionally, scrap has been the raw materials feed to the electric arc furnace, but increasingly direct reduced iron (DRI), pre reduced pellets and hot briquetted iron (HBI) are being focused as potential alternative charge materials for the electric arc furnace. The partial substitution of scrap by these charge materials directly affecting on the quality of steel and process consumptions in electric arc furnace. [..]
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SMETANA Bedřich VŠB - Technical University of Ostrava (VŠB-TUO), Faculty of Metallurgy and Materials Engineering (FMME), 17. listopadu 15/2172, CZ 708 33, Ostrava - Poruba, Czech Republic, EU, bedrich.smetana@vsb.cz
Co-authors:
ZLÁ Simona
KAWULOKOVÁ Monika
KALUP Aleš
GRYC Karel
MARTINÍK Ondřej
DOSTÁL Petr
FRANCOVÁ Hana
DOBROVSKÁ Jana
MICHALEK Karel
STROUHALOVÁ Michaela
VÁLEK Ladislav
Abstract:
The paper deals with the study of thermo-physical properties of selected real steel grade. The work is focused mainly on phase transition temperatures and heat capacities, particularly liquidus and solidus temperatures, eutectoid transition, alfa-gamma and magnetic transition. [..]
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DUDA Jiří VÍTKOVICE STEEL, a.s., Štramberská 2871/47, Ostrava, Czech Republic, EU
Co-authors:
ČAMEK Libor
MASARIK Miloš
Abstract:
The article describes an approach to decreasing the rejection rate of the steel plates due to the surface defects in the rolling mill achieved by optimization of air-water secondary cooling on the continuous casting machine (CCM) of steel. In context with the occurrence of the surface cracks on the steel plates a complex analysis of possible reasons causing the creation of monitored cracks was made. [..]
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KALUP Aleš Department of Physical Chemistry and Theory of Technological Processes, Faculty of Metallurgy and Materials Engineering, VŠB-Technical University of Ostrava, 17. listopadu 15, Ostrava-Poruba, 708 33
Co-authors:
ŘEHÁČKOVÁ Lenka
ZLÁ Simona
KAWULOKOVÁ Monika
SMETANA Bedřich
Abstract:
In the presented work, new thermodynamic approach based on basic thermodynamics was used for calculation of the surface tension of steel. Surface tension was calculated for three steel grades and calculated values were compared with experimental values at 1550 °C. [..]
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VOLKOVÁ Anežka VSB - Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Institute of Industrial Ceramics, Ostrava, Czech Republic, EU, anezka.volkova@vsb.cz
Co-authors:
BURDA Jiří
KLIMSZOVÁ Andrea
VLČEK Jozef
Abstract:
Slag from iron and steel metallurgy can be divided into the blast furnace slag and ladle slag (ladle slag are divided into furnace slag and ladle slag). Slag is a by product of the metallurgical industry and it is the subject of several research. [..]
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Hrabovský Jozef Heat Transfer and Fluid Flow Laboratory, Faculty of Mechanical Engineering, VUT Brno, Brno, Czech Republic, EU, hrabovsky@fme.vutbr.cz
Co-authors:
Chabičovský Martin
Astrouski Ilya
Kotrbáček Petr
Abstract:
Cooling by water sprays is widely used in heat treatment and other metallurgical processes to control the process temperature. Water spray cooling is used statically (without movement of the spray nozzles relative to the cooled object) or dynamically (with the movement). [..]
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Bekeč Pavel ŽP Research and Development Centre, Kolkáreň 35, 976 81 Podbrezová, bekec@zelpo.sk
Co-authors:
Longauerová Margita
Longauer Svätoboj
Milkovič Ondrej
Konrádyová Jana
Tréfa Gabriel
Grimplini Gabriel
Abstract:
This work studies the influence of precipitation on branched crack formation in the surface skin of continuously-cast slabs of Ti-Nb HSLA steel. Two slabs were analysed, cast at pulling rates of 0.43 m.min-1 and 1.03 m.min-1. [..]
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Drápala Jaromír VSB-Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, RMSTC, Av. 17. listopadu 15, 708 33 Ostrava-Poruba, Czech Republic
Co-authors:
Brožová Silvie
Madaj Michal
Kostiuková Gabriela
Szurman Ivo
Konečná Kateřina
Vontorová Jiřina
Machovčák Pavel
Jonšta Petr
Klosová Kateřina
Abstract:
The influence of cerium addition on solidification structure of the low-carbon 42CrMo4 steel was investigated. Alloys were prepared by means of a centrifugal casting. [..]
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GRYC Karel VŠB - Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Department of Metallurgy and Foundry, and Regional Materials Science and Technology Centre, Ostrava, Czech Republic, EU, karel.gryc@vsb.cz, michaela.strouhalova@vsb.cz, ladislav.socha@vsb.cz, karel.michalek@vsb.cz
Co-authors:
STROUHALOVÁ Michaela
SMETANA Bedřich
KAWULOKOVÁ Monika
ZLÁ Simona
MICHALEK Karel
KALUP Aleš
Abstract:
The paper is devoted to the study of the influence of experimental conditions of the direct thermal analysis method for use in high-temperature thermal analysis equipment Netzsch STA 449 F3 JUPITER during controlled cooling mode.The first part of the article is focused on monitoring of the effect of experimental conditions on the solidification point of the standard material nickel (a purity of 99.995 %) and the total shape of cooling curve. On the basis of experimental measurements, a deviation obtained by interpreting the cooling curves for various cooling rates (5; 10; 15 and 20 °C min-1) for nickel samples of various weights (5; 10; 15 and 20 g) from the generally recognized melting / solidification point of nickel (1455 °C) can be quantified.Besides the identification of the influence of experimental conditions on the temperature of solidification and the total cooling curve of nickel shape during solidification, the paper focuses attention on the mapping and interpreting the response found during the solidification of steel sample and the resulting to liquidus (TL) and solidus (TS) temperature of this steel. [..]
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JURSOVÁ Simona VSB – Technical University of Ostrava, Centre ENET, Ostrava, Czech Republic, simona.jursova@vsb.cz
Co-authors:
PUSTĚJOVSKÁ Pavlína
BROŽOVÁ Silvie
Abstract:
The paper deals with porosity of metallurgical sinter. It is aimed at the research on relation between porosity and reducibility of sinter. [..]
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Kovář Ladislav VSB-Technical University of Ostrava, Faculty of Mechanical Engineering, Ostrava, Czech Republic, EU, ladislav.kovar@vsb.cz
Abstract:
Special designs of nozzles or tuyeres are used in high-temperature units treating metal scrap for blowing gaseous technological media into the melt below the bath level. The higher technology utilisation of media is achieved by the blowing of media into the melt below the bath level. [..]
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ZEGZULKA Jiří VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Institute of Transportation, Ostrava, Czech Republic, EU
Co-authors:
BOTULA Jiří
JEZERSKÁ Lucie
KRATOCHVÍL Michal
HLOSTA Jakub
NEČAS Jan
Abstract:
The aim of the study was to investigate the possibility of a partial upgrade of the existing technological line at the company Calumite s.r.o., intended for the treatment of blast furnace slag for its secondary use. The first step was detailed characterization of the materials by means of mechanical-physical parameters, among which are, for example, the particle size distribution, compressibility, and the angle of internal and external friction. [..]
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KRČEK Břetislav VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, bretislav.krcek@vsb.cz
Abstract:
Last year we presented the mathematical model of the motion of burden materials in the bell-less blast furnace top of the type Paul Wurth or Vitkovice. The article from previous year concerned namely with one phase of the motion - motion at the rotating chute. [..]
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