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Wyszukujesz frazę "Gašpár, Štefan" wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Surface Remelting of Mold Inserts Made of NC11 Steel
Autorzy:
Trytek, Andrzej
Tupaj, Mirosław
Majerník, Ján
Gašpár, Štefan
Zbyrad-Kołodziej, Wiktoria
Łysiak, Karol
Powiązania:
https://bibliotekanauki.pl/articles/106945.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
NC11 steel
mold inserts
concentrated heat stream
metallographic tests
Opis:
In the study presented in this paper, the effect of a concentrated heat stream on geometry, microstructure, and hardness of superficial remeltings on NC11 steel is examined. The material is used for disposable mold inserts exposed to intensive abrasive wear in the course of the press-molding of hard aggregate stampings for refractory bricks. As a result of local remelting, the hardness of the steel surface increased and its microstructure was altered. Macro- and microstructure of the remelted areas was examined with the use of optical microscopy and measurements of remelting area geometry were carried out for different parameters of the remelting process. Hardness measurements were taken in the remelting area and in the heat-affected zone. The state of stress in the material before remelting and in the remelted area was also evaluated.
Źródło:
Journal of Casting & Materials Engineering; 2020, 4, 1; 9-15
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustic emission of corroded weldments during tensile test
Autorzy:
Sustr, Michal
Zacal, Jaroslav
Dostal, Peter
Cerny, Oldrich
Pristavka, Miroslav
Dobrocky, David
Gaspar, Stefan
Pasko, Jan
Powiązania:
https://bibliotekanauki.pl/articles/409757.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
weld joint
hot-dip galvanising
corrosion
acoustic emission
protection
Opis:
The article deals with the use of acoustic emission to identify the formation of cracks during the mechanical loading in the corrosive attacked weldment S235JR+N. The experiment includes the methodology for continual record of emissive signals, data analysis and monitoring of material response to monitor mechanical stress effect in real time. There is possibility to observe response of corrosive degraded samples in real time during mechanical stress through the suitably designed methodology of detection, process and analysing of acoustic emission signals. It is possible to gain new information about processes rising inside the material by this way of data measurement. The signals of acoustic emission can be used as the way of identification for the micro cracks rising in the inner and also external structure of effortful materials.
Źródło:
Management Systems in Production Engineering; 2019, 4 (27); 211-216
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innovation in the winter road maintenance and its economic justification
Autorzy:
Sedivy, Stefan
Florkova, Zuzana
Gaspar, Gabriel
Dudak, Juraj
Fabo, Peter
Powiązania:
https://bibliotekanauki.pl/articles/1841151.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
cost
economy
innovation
pavement
winter road operation
koszt
gospodarka
innowacyjność
nawierzchnia
zimowa eksploatacja dróg
Opis:
In general, it can be presented that winter road maintenance costs are rising due to increasing mobility, rising of salaries, and technological needs. For this reason, it is necessary to bring innovations into these processes. The greatest space is in the area of weather forecasting, which is a trigger for maintenance activities in the form of reducing black ice or snow removal. Road administrators use predictive services as a standard to obtain critical atmospheric temperature and weather data in advance. From the point of view of transport safety, the need to obtain predictive temperature data on the road surface is also important. These must also be obtained largely by knowing the temperature trends inside the road structure. The article presents the direction of our own research activities, whereas it focuses on the philosophy of research, justification of the idea, the introduction of research procedures, and the presentation of partial results.
Źródło:
Transport Problems; 2020, 15, 4, cz. 2; 253-264
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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