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Wyszukujesz frazę "Borowiecki, B." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Segregation of Admixing Elements in the Boundary Layer of the Main Inlet of a Ductile Iron Casting
    Autorzy:
    Borowiecki, B.
    Mak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/382659.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ductile iron
    nodular graphite
    boundary layer
    żeliwo sferoidalne
    grafit sferoidalny
    warstwa przyścienna
    Opis:
    The object of the present paper is to determine the distribution of admixing elements, such as magnesium, manganese, silicon and sulfur, in the boundary layer of the main inlet of a ductile iron casting. The authors also intend to demonstrate the influence of elements diffusing from the casting mold, such as oxygen and silica, on the chemical composition of the boundary layer of the casting.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2 spec.; 10-17
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation Between Surface Roughness and Rheological Properties of Liquid Ductile Cast Iron
    Autorzy:
    Borowiecki, B.
    Sobiecka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/382017.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ductile cast iron
    rheological properties
    roughness surface
    żeliwo sferoidalne
    właściwości reologiczne
    powierzchnia chropowata
    Opis:
    The investigation of filling process of ductile cast iron flow in sand mould was showed the correlation between casting roughness surface and rheological properties of metal. Evidently of castings surface roughness was state of distance, from a few to a dozen diameters of vertical channel inlet. The method of rod fluidity test permit to study of rheological properties of metal and the roughness surface of castings.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2s; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Casting defects analysis by the Pareto method
    Autorzy:
    Borowiecki, B.
    Borowiecka, O.
    Szkodzińska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/381830.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting defect
    Pareto analysis
    slag inclusions
    sand hole
    wada odlewu
    analiza Pareto
    wtrącenia żużlowe
    Opis:
    On the basis of receive results formed of diagram Pareto Lorenz. On the basis of receive graph it affirmed, that for 70% general number casting defects answered 3 defects (9 contribution – 100% defects). For 70% general number defects of influence it has three type of causes: sand holes, porosity and slag inclusions. The defects show that it is necessary to take up construction gating system. The remaining 8 causes have been concerned only 25%, with general number of casting defects. Analysis of receive results permit to determine of direction of correct actions in order to eliminate or to limit the most defects.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 33-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Initial Assessment of Graphite Precipitates in Vermicular Cast Iron in the As-Cast State and after Thermal Treatments
    Autorzy:
    Soiński, M. S.
    Jakubus, Aneta
    Borowiecki, B.
    Mierzwa, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2126913.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    vermicular cast iron
    graphite precipitates
    thermal treatments
    austempering
    żeliwo wermikularne
    morfologia grafitu
    obróbka termiczna
    hartowanie
    Opis:
    The purpose of the work was to determine the morphology of graphite that occurs in vermicular cast iron, both in the as-cast state and after heat treatment including austenitization (held at a temperature of 890°C or 960°C for 90 or 150 min) and isothermal quenching (i.e. austempering, at a temperature of 290°C or 390°C for 90 or 150 min). In this case, the aim here was to investigate whether the heat treatment performed, in addition to the undisputed influence of the cast iron matrix on the formation of austenite and ferrite, also affects the morphology of the vermicular graphite precipitates and to what extent. The investigations were carried out for the specimens cut from test coupons cast in the shape of an inverted U letter (type IIb according to the applicable standard); they were taken from the 25mm thick walls of their test parts. The morphology of graphite precipitates in cast iron was investigated using a Metaplan 2 metallographic microscope and a Quantimet 570 Color image analyzer. The shape factor F was calculated as the quotient of the area of given graphite precipitation and the square of its perimeter. The degree of vermicularization of graphite was determined as the ratio of the sum of the graphite surface and precipitates with F <0.05 to the total area occupied by all the precipitations of the graphite surface. The examinations performed revealed that all the heat-treated samples made of vermicular graphite exhibited the lower degree of vermicularization of the graphite compared to the corresponding samples in the as-cast state (the structure contains a greater fraction of the nodular or nearly nodular precipitates). Heat treatment also caused a reduction in the average size of graphite precipitates, which was about 225μm2 for the as-cast state, and dropped to approximately 170-200 μm2 after the austenitization and austempering processes.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 4; 131--136
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Status of a mega-joule scale Plasma-Focus experiments
    Autorzy:
    Scholz, M.
    Bieńkowska, B.
    Borowiecki, M.
    Ivanova-Stanik, I.
    Karpiński, L.
    Stępniewski, W.
    Paduch, M.
    Tomaszewski, K.
    Sadowski, M.
    Szydłowski, A.
    Kubeš, P.
    Kravárik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147496.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma focus
    dense magnetized plasma
    neutron yield
    Opis:
    This paper presents results of the recent plasma-focus (PF) experiments carried out with PF facilities, which was operated at energies ranging from 0.5 MJ to about 1 MJ. Particular attention has been paid to pinch evolution, the emission of pulsed X-ray, fast electron beams, and fusion produced neutrons. Some theoretical models of the initial breakdown, which occurs at the insulator surface, are compared. It is pointed out that modeling of the breakdown is sensitive to kinetics of ionization processes and transport coefficients. Progress in experimental studies of the axial acceleration phase is unsatisfactory. Important experimental data have been collected, but new measurements are still needed. For the radial collapse phase, it was shown that the MHD modeling is efficient until the maximum compression, but plasma instabilities require more sophisticated approaches. The pinch phase was investigated by means of different diagnostics. Fusion neutron yields were measured in different experiments, but some discrepancies in scaling must still be explained. The conclusions concern directions for further studies and optimization of large-scale high-current PF facilities.
    Źródło:
    Nukleonika; 2006, 51, 1; 79-84
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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