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Wyszukujesz frazę "iron surface" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-4 z 4
    Tytuł:
    On Degradation of Cast Iron Surface - Protective Paint Coat Joint
    Autorzy:
    Tupaj, M.
    Orłowicz, A. W.
    Mróz, A.
    Bąk, G.
    Abram, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381862.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thin-wall casting
    flake graphite
    grey cast iron
    corrosion
    protective paint coat
    odlewy cienkościenne
    grafit
    żeliwo szare
    korozja
    powłoka ochronna
    Opis:
    The paper is a presentation of a study on issues concerning degradation of protective paint coat having an adverse impact on aesthetic qualities of thin-walled cast-iron castings fabricated in furan resin sand. Microscopic examination and microanalyses of chemistry indicated that under the coat of paint covering the surface of a thin-walled casting, layers of oxides could be found presence of which can be most probably attributed to careless cleaning of the casting surface before the paint application process, as well as corrosion pits evidencing existence of damp residues under the paint layers contributing to creation of corrosion micro-cells.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 133-136
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultrasonic Testing of Vermicular Cast Iron Microstructure
    Autorzy:
    Tupaj, M.
    Orłowicz, A. W.
    Mróz, M.
    Kupiec, B.
    Pająk, D.
    Kawiński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837866.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    vermicular cast iron
    vermiculatization method
    microstructure
    ultrasonic testing
    graphite precipitation surface density
    żeliwo wermikularne
    wermikulatyzacja
    mikrostruktura
    badanie ultradźwiękowe
    Opis:
    The paper presents results of a study on the effect of passage of time on magnesium content in iron alloys and the effect of magnesium content on the number of vermicular graphite precipitations per unit surface area and value of the longitudinal ultrasonic wave velocity for two different vermicularization methods. The study was carried out with the use of inspection bar castings. For specific production conditions, it has been found that in case of application of both the cored wire injection method and the method of pouring liquid metal over magnesium master alloy on ladle bottom, the satisfactory level of magnesium content in the bottom-pour ladle, for which it was still possible to obtain castings with vermicular graphite, was 0.018% Mg. In case of the cored wire injection method, the “time window” available to a pouring station at which castings of vermicular cast iron are expected to be obtained, was about 5 minutes. This corresponds to the longitudinal ultrasonic wave velocity values exceeding 5500 m/s and the number of graphite precipitations per unit surface area above 320 mm-2. In case of the master alloy method, the respective “time window” allowing to obtain castings of vermicular cast iron was only about 3 minutes long. This corresponds to the longitudinal ultrasonic wave velocity value above 5400 m/s and the number of graphite precipitations per unit surface area above 380 mm-2.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 36-40
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Microstructure and Heat Transfer Surface on the Thermal Power of Cast Iron Heat Exchangers
    Autorzy:
    Mróz, M.
    Orłowicz, A. W.
    Tupaj, M.
    Lenik, M.
    Kawiński, M. J.
    Kawiński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079819.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    vermicular cast iron
    heat exchanger
    thermal power
    calorimetric test
    żeliwo wermikularne
    wymiennik ciepła
    moc cieplna
    test kalorymetryczny
    Opis:
    The paper presents the results of calorimetric tests of segment elements of fireplace inserts. The aim of the work was to optimize their thermal power by replacing the previously used gray cast iron with flake graphite with gray iron with vermicular graphite and replacing the existing geometry of the heat transfer surface with a more developed one. It turned out that the thermal power of the test segments made of cast iron with vermicular graphite was higher compared to the segments of the same shape made of gray cast iron with flake graphite. It was found that the use of segments made of vermicular cast iron with a ferritic matrix allowed for an increase in the thermal power value by dozen percent, compared to segments of the same shape made of vermicular cast iron with a pearlitic matrix. The test results showed that the thermal power of the test segments depends on the variant of the development of both the heat receiving surface and the heat giving off surface. The highest value of the thermal power was obtained when ribbing in the form of a lattice was used on both of these surfaces, and the lowest when using flat surfaces.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 4; 93-96
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of a Thin-Wall Casting Mould Cavity Filling Conditions on the Casting Surface Quality
    Autorzy:
    Trytek, A.
    Orłowicz, A. W.
    Tupaj, M.
    Mróz, M.
    Markowska, O.
    Bąk, G.
    Abram, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382148.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thin wall casting
    grey cast iron
    cold shots
    computer simulation
    odlew cienkościenny
    żeliwo szare
    symulacja komputerowa
    Opis:
    The paper presents results of metallographic examination of faults occurring in the course of founding thin-walled cast-iron castings in furan resin sand molds. A non-conformance of the scab type was Observed on surface of the casting as well as sand buckles and cold shots. Studied the chemical composition by means of a scanning electron microscope in a region of casting defects: microanalysis point and microanalysis surface. Around the observed defects discloses high concentration of oxides of iron, manganese and silicon. A computer simulation of the casting process has been carried out with the objective to establish the cause of occurrence of cold shots on casting surface. The simulation was carried out with the use of NovaFlow & Solid program. We analyzed the flowing metal in the mold cavity. The main reason for the occurrence of casting defects on the surface of the casting was gating system, which caused turbulent flow of metal with a distinctive splash stream of liquid alloy.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 222-226
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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