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Wyszukujesz frazę "Krutis, V." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Effect of Alloying Elements on Properties and Structure of High Chromium Cast Irons
    Autorzy:
    Kaňa, V.
    Záděra, A.
    Krutiš, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/351222.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high chromium cast irons
    wear resistance
    carbides
    refinement
    Opis:
    The paper deals with hypereutectic high chromium cast irons. The subject of examination was the effect of various alloying elements (Ti, W, Mo, V) on the size of primary carbides and on the resultant material hardness. Using a scanning electron microscope with a wave dispersion analyser, the carbon content in carbides was established. To determine the other elements, an energy dispersion analyser was used. It was found that both the primary and the eutectic carbides were of the M7C3 type and very similar in composition. The carbides always contained Cr and Fe, and also W, Mo, V or Ti, in dependence on the alloying elements used. The structure of materials containing only chromium without any alloying additions exhibited coarse acicular primary carbides. The structure of materials alloyed with another element was always finer. Marked refinement was obtained by Ti alloying.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 609-614
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Methods for Determining the Ferrite Content in Duplex Cast Steels
    Autorzy:
    Kaňa, V.
    Pernica, V.
    Zadera, A.
    Krutiš, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/382804.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-destructive testing
    duplex cast steel
    metallographic evaluation
    XRD
    ferritoscope
    badania nieniszczące
    staliwo
    metalografia
    ferryt
    zawartość ferrytu
    Opis:
    The paper is concerned with comparing the methods for determining the ferrite content in castings from duplex stainless steels. It uses Schaeffler diagram, empirical formula based calculation, image analysis of metallographic sample, X-ray diffraction and measurement with a feritscope. The influence of wall thickness of the casting on the ferrite content was tested too. The results of the experiments show that the casting thickness of 25 or 60 mm does not have a significant effect on the measured amount of ferrite. The image analysis of metallographic sample and the measurement with the feritscope appear to be the most suitable methods. On the contrary, predictive methods, such as Schaeffler diagram or empirical formula based calculation are only indicative and cannot replace the real measurements. X-ray diffraction seems to be the least suitable measuring method. Values of ferrite content measured in such a way often deviated from the values measured by image analysis and with feritscope.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 85-90
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Lamellar Graphite Cast Iron Annealing on Hardness and Structure
    Autorzy:
    Roučka, J.
    Prochazka, J.
    Kana, V.
    Krutis, V.
    Nedelova, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/380964.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast iron
    welding
    annealing
    cast iron hardness
    structure stability
    żeliwo
    spawanie
    wyżarzanie
    twardość żeliwa
    struktura
    stabilność
    Opis:
    An analysis has been carried out of the influence of annealing time at the preheating temperature of 650 °C on the change in hardness and alloy structure of lamellar graphite cast iron in the working as well as in the laboratory conditions. This preheat temperature is common during reclaiming welding of castings with complex shapes. The changes in unalloyed cast iron EN-GJL 200 to EN-GJL 300 according to ISO 1690 standard and cast iron with low amount of elements such as Sn, Cu, Cr, and Mo and their combinations were assessed. It was found that the cast iron of higher strength grades has better hardness and structural stability. Cast iron alloyed with chromium or its combinations has the highest stability. In unalloyed cast iron, a partial degradation of pearlite occurs; in alloyed cast iron the structural changes are not conclusive.
    Źródło:
    Archives of Foundry Engineering; 2019, 4; 105-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integration of Virtual Engineering and Additive Manufacturing for Rapid Prototyping of Precision Castings
    Autorzy:
    Krutiš, V.
    Šprta, P.
    Kaňa, V.
    Zadera, A.
    Cileček, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837786.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    product development
    innovative foundry technologies
    virtual engineering
    rapid prototyping
    rozwój produktu
    innowacyjne technologie odlewnicze
    inżynieria wirtualna
    prototyp
    Opis:
    The present paper is concerned with the practical interconnection between virtual engineering tools and additive model manufacturing technologies and the subsequent production of a ceramic shell by rapid prototyping with the use of Cyclone technology to produce the aluminium casting prototype. Prototypes were developed as part of the student formula project, where several parts originally produced by machining were replaced by castings. The techniques of topological optimization and the combination with the tools of the numerical simulation were used to optimise the virtual prototype before a real production of the first prototype. 3D printing of wax pattern ensured direct and fast assembly of the cluster without any additional operations and troubles during dewaxing. The shell was manufactured in 6 hours thanks to a system of quick-drying of individual layers of ceramic shell. It has been verified that the right combination of individual virtual tools with the rapid prototyping can shorten the development time and delivery of the first prototypes from a few months to a few weeks.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 51-55
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integration of Virtual Engineering and Additive Manufacturing for Rapid Prototyping of Precision Castings
    Autorzy:
    Krutiš, V.
    Šprta, P.
    Kaňa, V.
    Zadera, A.
    Cileček, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837847.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    product development
    innovative foundry technologies
    virtual engineering
    rapid prototyping
    rozwój produktu
    innowacyjne technologie odlewnicze
    inżynieria wirtualna
    prototyp
    Opis:
    The present paper is concerned with the practical interconnection between virtual engineering tools and additive model manufacturing technologies and the subsequent production of a ceramic shell by rapid prototyping with the use of Cyclone technology to produce the aluminium casting prototype. Prototypes were developed as part of the student formula project, where several parts originally produced by machining were replaced by castings. The techniques of topological optimization and the combination with the tools of the numerical simulation were used to optimise the virtual prototype before a real production of the first prototype. 3D printing of wax pattern ensured direct and fast assembly of the cluster without any additional operations and troubles during dewaxing. The shell was manufactured in 6 hours thanks to a system of quick-drying of individual layers of ceramic shell. It has been verified that the right combination of individual virtual tools with the rapid prototyping can shorten the development time and delivery of the first prototypes from a few months to a few weeks.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 37-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Heat Treatment and Nickel Content on the Properties of the GX4CrNi13-4 Steel
    Autorzy:
    Kaňa, V.
    Krutiš, V.
    Bořil, P.
    Záděra, A.
    Rimko, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049568.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    martensitic steel
    retained austenite
    mechanical properties
    heat treatment
    Opis:
    For the EN GX4CrNi13-4 martensitic stainless steel, research was conducted to investigate the impact of the quenching intensity and the content of nickel on the mechanical properties and amount of retained austenite. It was found that the amount of retained austenite significantly increases with growing nickel concentration. On the other hand, the cooling rate at quenching makes a difference only if the cooling is intensive, then amount of retained austenite decrease. A higher nickel content improves the mechanical properties. With more intensive cooling, the tensile strength decreases while the yield strength increases. The ductility is not significantly affected by the cooling intensity.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 37-41
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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