Metallurgy and Foundry Engineering
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ISSN 1230-2325
e-ISSN: 2300-8377
Issue Date
2015
Volume
Vol. 41
Number
No. 1
Description
Journal Volume
Metallurgy and Foundry Engineering
Vol. 41 (2015)
Projects
Pages
Articles
Electrochemical codeposition of molybdenum and selenium
(2015) Kowalik, Remigiusz; Kutyła, Dawid; Mech, Krzysztof; Wróbel, Mirosław; Tokarski, Tadeusz; Żabiński, Piotr
The electrodeposition of Mo-Se thin films from a sulfate solution containing Na2MoO4 and H2SeO3 was studied. The process of deposition was conducted under potentiostatic conditions on a copper electrode. The effect of potential value, pH, and time of deposition were examined. The deposits were characterized by X-ray diffraction, X-ray fluorescence, and scanning electron microscopy. The obtained results have shown the possibility of co-deposition of molybdenum and selenium with different stoichiometric ratios.
High-temperature rheometry of blast furnace synthetic slags doped with TiO₂ and TiN
(2015) Migas, Piotr; Ślęzak, Marta
Development has been conducted regarding the methodology of rotational measurements with a high temperature rheometer using Searle's method. The rheological analysis of liquid systems CaO-SiO2-Al2O3-MgO-TiO2 slags, and solid particles of titanium nitride TiN are presented (within a range of 0.1-0.7 of the volume fraction of TiN). The measurements were conducted at a range between 1310°C and 1500°C, which is typical for high-temperature zones in a blast furnace. The main objective of the study was to analyze the possibilities of viscosity measurements in homogenise and heterogenic systems (not standard systems within the industrial practice). The measurements were conducted for totally liquid blast furnace slags which show similarity to ideally viscous Newtonian bodies and also for heterogenic systems.
Mechanical properties and corrosion resistance of cast NiAl alloys with the addition of Ti
(2015) Hyjek, Paweł; Sulima, Iwona; Malczewski, Piotr
Results of compression- and corrosion-resistance tests of NiAl alloys with 1.0 and 2.0 wt.% of titanium are described. The compression tests conducted at a wide range of temperatures, and the strain rate showed that an increase in titanium content causes increased brittleness at room temperature, while at higher temperatures, an increase of hardness and strength is observed. The analysis of electrochemical corrosion resistance showed that alloys containing Ti are characterized by considerable resistance to sulfuric acid VI, because the emerging titanium oxide prevents the active solubilization of the alloy. Besides, microstructure observations performed at various levels of deformation, which allowed us to identify the mechanisms responsible for fracture of the studied alloys.
Computer modeling for the visualization and geometric reconstruction of artefacts from the casting workshop in Grzybiany
(2015) Garbacz-Klempka, Aldona; Rzadkosz, Stanisław; Stolarczyk, Tomasz; Kozana, Janusz; Piękoś, Marcin; Kwak, Zofia; Tenerowicz, Mieszko
The casting workshop in Grzybiany is one of the most important archaeological sites in regards to casting technology from the Bronze and Early Iron Ages. During the 'Grzybiany. Osada nadjeziorna z epoki brązu i żelaza' [Grzybiany. Lakeside settlement from the Bronze and Early Iron Ages] research, the structure of casting moulds was analyzed as well as the chemical composition and microstructure of one of the more-interesting metal artefacts found within the workshop. Based on this, geometric visualization was performed with the help of computer-modeling methods. For scientific, experimental, and educational purposes, reconstruction of a zoomorphic pendant was performed using the lost-wax method. Wax models injected into a matrix were used, along with fired ceramic (gypsum) moulds and a specially prepared modeling alloy that corresponds to the original material. In this way, a true replica of the original was obtained: technologically, structurally and chemically. Studies of production technology of the casting workshop dated back to the Bronze and Early Iron Age help to increase the knowledge of the mould-preparing technology and the alloys used. Modern tools and computer programs aid in the research of old technologies and help disseminate the results.