Metallurgy and Foundry Engineering
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ISSN 1230-2325
e-ISSN: 2300-8377
Issue Date
2018
Volume
Vol. 44
Number
No. 1
Description
Journal Volume
Metallurgy and Foundry Engineering
Vol. 44 (2018)
Projects
Pages
Articles
Influence of ladle shroud and change in its position on liquid steel flow hydrodynamic structure in six-strand tundish
(Wydawnictwa AGH, 2018) Bartosiewicz, Michał; Cwudziński, Adam
This paper presents the numerical simulation results of the liquid steel flow in a six-strand tundish used for casting billets. The influence of using a ladle shroud, changing its immersion depth in liquid steel on the transition zone, and shaping the liquid steel volume flow were tested. Three positions of the ladle shroud immersion depth in liquid steel were checked. The computer calculation results have shown that the use and position change of the ladle shroud locally influences the shape of the liquid steel hydrodynamic structure in the tundish. The numerical simulations were carried out using the Ansys-Fluent computer program.
Influence of continuous steel casting conditions on behavior and stability of liquid mold slag during slab casting - physical modeling
(Wydawnictwa AGH, 2018) Bielnicki, Marcin; Jowsa, Jan
This article presents the results of the physical modeling of the continuous casting of steel slabs in a mold. The experiments focused on the assessment of the shape and stability of the liquid mold slag layer, which was reproduced in studies using silicone oil. The experimental tests were carried out for two different geometries of the submerged entry nozzle, two extreme submergence depths of the submerged entry nozzle (0.215 and 0.295 m), and two extreme casting speeds (1.0 and 1.6 m/min) used in industry. For each variant of the experiment, photographic documentation of the oil layer's behavior was presented and discussed. The research was supplemented with a visualization of the flow structure using a marker for the selected variant of the experiment.
Experimental study on DP600 clinched joints
(Wydawnictwa AGH, 2018) Szabolcs, Jónás; Tisza, Miklós
Clinching is an effective joining technique for lightweight sheet materials that are difficult or impossible to weld. Clinching is a relatively new technology in which two to three sheet metal parts are joined together by a process of local plastic deformation without the use of any additional components with the application of a special tool. In this study, an experimental investigation of clinch joints was performed. A non-standardized technique was used to determine the optimal joint geometry for further experiments. The used material type was DP600 (dual-phase, advanced high strength steel).
Effect of organic additives on electrodeposition of tin from acid sulfate solution
(Wydawnictwa AGH, 2018) Rudnik, Ewa; Chowaniec, Grzegorz
Basic electrochemical experiments on the kinetics of tin deposition from an acid sulfate solution containing organic additives were performed. The measurements showed that tin deposits with activation polarization in a narrow potential range. Organic additives like gelatin and ?-naphtol inhibit the charge transfer stage of the cathodic reaction due to the formation of adsorption layers. In turn, the gluconate ions increase the rate of tin deposition due to the bonding of hydrogen ions and inhibiting hydrogen coevolution. This results in serious changes in the morphology of tin deposits from isolated polyhedron crystals (no additive) via rectangular plates (?-naphtol) and thin plates (sodium gluconate) to rounded grains (gelatin).