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    Wyświetlanie 1-3 z 3
    Tytuł:
    Effective Laboratory Method of Chromite Content Estimation in Reclaimed Sands
    Autorzy:
    Ignaszak, Z.
    Prunier, J. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/380085.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chromite sand
    magnetic recuperation
    neodymium magnets
    furan sand dry
    reclamation
    ferrous alloys
    heavy castings
    Opis:
    The paper presents an original method of measuring the actual chromite content in the circulating moulding sand of foundry. This type of material is applied for production of moulds. This is the case of foundry which most frequently perform heavy casting in which for the construction of chemical hardening mould is used, both the quartz sand and chromite sand. After the dry reclamation of used moulding sand, both types of sands are mixed in various ratios resulting that in reclaimed sand silos, the layers of varying content of chromite in mixture are observed. For chromite recuperation from the circulating moulding sand there are applied the appropriate installations equipped with separate elements generating locally strong magnetic field. The knowledge of the current ratio of chromite and quartz sand allows to optimize the settings of installation and control of the separation efficiency. The arduous and time-consuming method of determining the content of chromite using bromoform liquid requires operational powers and precautions during using this toxic liquid. It was developed and tested the new, uncomplicated gravimetric laboratory method using powerful permanent magnets (neodymium). The method is used in the production conditions of casting for current inspection of chromite quantity in used sand in reclamation plant.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 162-166
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    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
    Artykuł
      Wyświetlanie 1-3 z 3

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