Autor: Szczęsny, Dariusz. - Katalog OPAC zbiorów

Tytuł:: Directions of the Development of the Metallization of Iron Alloy Products
Autorzy:: Szczęsny, Andrzej
Kopyciński, Dariusz
Guzik, Edward
Powiązania:: https://bibliotekanauki.pl/articles/2056027.pdf
Data publikacji:: 2021
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: hot-dip galvanizing
aluminizing
protective coatings
zinc
cynkowanie ogniowe
aluminizowanie
powłoki ochronne
cynk
Opis:: The article discusses the future of the production of protective coatings based on the hot-dip galvanizing of iron-carbon alloys, such as steel or cast iron. Currently exploited zinc deposits will be exhausted in the next two decades and it will be necessary to start the exploitation of new deposits in order to maintain the supply or quantity of Zn on the global market. In both cases, it will be related to the increasing cost of zinc on world markets. Zinc-based protective coatings (one of the best corrosion protection methods) constitute almost 50% of the world’s zinc consumption. Economic issues with the constant increase in the price of Zn will force the change or modification of hot-dip galvanizing technology. The article presents data on the production, consumption and development of zinc prices on the global market. Possible directions are presented which producers of zinc coatings will have to follow in order to maintain sales markets, such as the modification of chemical compositions of protective alloys which could be an alternative to pure zinc coatings and the possibility of limiting zinc consumption based on the influence of the surface of galvanized elements, i.e. its metal matrix, and surface roughness.
Źródło:: Journal of Casting & Materials Engineering; 2021, 5, 3; 40--44
2543-9901
Pojawia się w:: Journal of Casting & Materials Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Inoculation of Gray Cast Iron Intended for Large Scale and Heavy Weight Castings of Bottom Plates and Counterweights Manufactured in the KrakOdlew S.A.
Autorzy:: Szczęsny, Andrzej
Kopyciński, Dariusz
Guzik, Edward
Powiązania:: https://bibliotekanauki.pl/articles/2174620.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heavy castings
large scale casting
grey cast iron
inoculation
odlew ciężki
odlewy wielkogabarytowe
żeliwo szare
inokulacja
Opis:: The paper presents research carried out during the development of new technology for the production of heavy-weight castings of counterweights. The research concerns the procedure of inoculation gray cast iron with flake graphite and indicates guidelines for the development of new technology for obtaining inoculated cast iron for industrial conditions. The research was conducted in order to verify the possibility of producing large size or heavy-weight castings of plates in a vertical arrangement. The aim is to evenly distribute graphite in the structure of cast iron and thus reduce the volumetric fraction of type D graphite. The tests were carried out using the ProCast program, which was used to determine the reference chemical composition, and the inoculation procedure was carried out with the use of three different inoculants. The work was carried out in project no. RPMP.01.02.01-12-0055 / 18 under the Regional Operational Program of the Lesser Poland Voivodeship in Krakow (Poland).
Źródło:: Archives of Foundry Engineering; 2022, 22, 3; 19--24
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Influence of wrongly assumed probability distribution on the uncertainty of resistance measurement by technical method
Autorzy:: Szczesny, Stanisław
Golijanek-Jędrzejczyk, Anna
Świsulski, Dariusz
Powiązania:: https://bibliotekanauki.pl/articles/377954.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: uncertainty of measurement
technical method
measurement of resistance
Opis:: The paper presents studies on the influence of probability distributions on the expanded uncertainty of the resistance measurement. Choosing the correct probability distribution is very important to estimate of measurement uncertainty. The most commonly used distribution is the rectangular distribution. The paper presents the results of analysis of the resistance measurement uncertainty using the technical method of two resistances: 1 Ω and 100 GΩ using different measuring equipment. The analysis of the uncertainty measurement of resistance was carried out repeatedly, each time assuming a different probability distribution of measuring instruments (normal, rectangular, triangular or trapezoidal). The results of the research presented in the article show that the influence of the assumed probability distributions on the result of the measurement uncertainty analysis is significant and results discrepancies can reach up to 30%.
Źródło:: Poznan University of Technology Academic Journals. Electrical Engineering; 2019, 100; 63-73
1897-0737
Pojawia się w:: Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The Method of Inoculation of High-Quality Grey Cast Iron Intended for Massive Castings for Bottom and Distance Plates as Well Counterweights Manufactured as Vertical Castings
Autorzy:: Guzik, Edward
Kopyciński, Dariusz
Ziółko, A.
Szczęsny, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/2203754.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: high-quality cast iron
heavy castings
massive casting
graphitizing inoculation
hybrid inoculation
Opis:: The technology of producing castings of high-quality inoculated cast iron with flake graphite particles in the structure is a combination of the melting and inoculation process. Maintaining the stability of the strength and microstructure parameters of this cast iron is the goal of a series of studies on the control of graphitization and austenitic inoculation (increasing the number of primary austenite dendrites), and which affects the type of metal matrix in the structure. The ability to graphitize the molten alloy decreases with its holding in the melting furnace more than an hour. The tendency to crystallize large dendritic austenite grains and segregation of elements such as Si, Ni and Cu reduce the ductility properties of this cast iron. The austenite inoculation process may introduce a larger number of primary austenite grains into the structure, affecting the even distribution of graphite and metal matrix precipitation in the structure. Known inoculation effects the interaction (in low mass) of additives: Sr, Ca, Ba, Ce, La, produces MC2 carbide). Addition of Fe in the inoculant influences the number and shape of austenite dendrites. Hybrid modification combines the effects of these two factors. The introduction of nucleation sites for the graphite eutectics and primary austenite grains result in the stabilization of the cast iron microstructure and an increase in mechanical properties. The obtained test results set the direction for further research in this area in relation to the production of heavy plate castings in vertical and horizontal pouring.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 1; 359--368
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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