Journal of Casting & Materials Engineering
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ISSN 2543-9901
Issue Date
2023
Volume
Vol. 7
Number
No. 3
Description
Journal Volume
Journal of Casting & Materials Engineering
Vol. 7 (2023)
Projects
Pages
Articles
Effect of cavitation phenomenon on the quality of high-pressure aluminium alloy castings
(AGH University Press, 2023) Brzeziński, Marcin; Wiśniowski, Jakub
This article presents an analysis of the effect of cavitation on the erosion of pressure moulds intended for the HPDC casting mould manufacturing process. Changes in the surface area of the eroded areas were investigated via photographs of castings at the begin-ning of the mould life as well as at 30%. The individual process variables were described and their influence verified via the cavitation potential module of the Flow3D simulation programme. The results are presented graphically with a description of the relationships and observations. The summary provides an explanation of the results and the dependencies that occurred.
Ecological electroplating baths and their application in the tin-coating of copper wires intended for photovoltaic cables
(AGH University Press, 2023) Olędzki, Aleksander; Knych, Tadeusz; Zasadzińska, Małgorzata
Copper wires are covered with various coatings for many different applications. The most popular are tin based coatings and both their thickness and quality have been standardized by means of appropriate standard specifications. Copper wires intended for photovoltaic cables are subjected to especially high requirements due to their exceptionally long operating time and extremely unfavourable working conditions. Tin coatings are applied using the electroplating method and generally a fluoroborate bath is used during the process, however, it has been proved to be a health hazard in general and harmful to the environment as a whole. The paper presents the research results of a new ecological methane-sulfonate bath which does not form hazardous waste in the process. The examples of tin coatings of various thickness and the way of obtaining them at varying electrodeposition speeds at constant current or constant speed with varying current intensity were analysed. It has been determined that the use of the new electroplating bath is not only beneficial from an ecological point of view, but also in terms of the coating quality and efficiency of the process.