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    Wyświetlanie 1-4 z 4
    Tytuł:
    Quality control of cylinder head casting
    Autorzy:
    Tillova, E.
    Chalupova, M.
    Kucharikova, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/111834.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    heat treatment
    quality control
    microstructure
    mechanical properties
    Al-Si cast alloy
    stop Al-Si
    obróbka cieplna
    kontrola jakości
    właściwości mechaniczne
    Opis:
    New challenges for the Aluminium alloys used for the production of castings for automotive engine components result from an evolutionary trend of internal combustion engines towards higher specific power output. Cylinder heads, in particular, have to withstand higher operating temperature and stress levels. Present work describes quality control of microstructure (Si-morphologhy and Si-size) and mechanical properties (UTS, elongation, Brinell hardness) of cylinder head casting as effect of different T6 heat treatment (solution heat treatment time - 2, 3, 4, 5, 6, 7 hours). The data obtained from this study will be used to improve process control, and to help the selection of heat treatment of the casting for future products.
    Źródło:
    Production Engineering Archives; 2017, 14; 3-6
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of laser surface treatment on the quality of microstructure in recycled Al-Zn-Si cast alloy
    Autorzy:
    Tillova, E.
    Durinikova, E.
    Chalupova, M.
    Radek, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/111696.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    secondary cast alloy
    laser surface treatment
    microstructure
    odlew stopu wtórnego
    obróbka powierzchniowa laserowa
    Opis:
    Recycled Al-Zn-Si casting alloys can often be used in new cast products for mechanical engineering, in hydraulic castings, textile machinery parts, cable car components or big parts without heat treatment. Improved mechanical properties and favourable of recycled microstructure of Al-alloys can often significantly increase the lifetime of casting and reduce costs for fuel and reduction of environmental loading. The paper is focused on using one of possible technologies that provide increased mechanical properties of recycled aluminium cast alloys for automotive industry, and that is laser surface hardening. For study was used recycled AlZn10Si8Mg cast alloy. The effect of laser beam Nd: YAG lasers BLS 720 was evaluated with the laser power 50 W and 80 W on the surface of samples. The final microstructure of aluminium alloys depend on the laser process parameters. The changes of microstructure as a grain refinement of the microstructure after laser surface hardening was observed by using classical techniques of etching and deep etching with concentrated HCl. Microstructure was evaluated on an optical microscope Neophot 32 and SEM.
    Źródło:
    Production Engineering Archives; 2014, 2, 1; 26-32
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Machinability of modified AlSi7Mg0,3 alloy
    Autorzy:
    Naprstkova, N.
    Cais, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/111908.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    alloy
    Al-Si
    modification
    machining
    hardness
    chip
    stop
    modyfikacja
    twardość
    wiór
    Opis:
    Al Alloys have an important position in the industry, mainly in the automotive and aerospace industries. One important group is silumins (Al-Si alloys). Al-Si alloys are the leading casting alloys based on aluminum. Machining of aluminum alloys is currently frequently used and it is an important area of production. This paper deals with an experiment that was conducted at the Faculty of Production Technology and Management, University of Jan Evangelista Purkyně in Ústí nad Labem, where alloy AlSi7Mg0,3 was experimented upon. Samples were made for processing from the master alloy AlSi7Mg0,3, subsequently unmodified and modified of Sr, Ca and Sb. This paper describes the evaluation of hardness, chip and tool wear in terms of how modification by Sr, Ca and Sb may affect analytical values.
    Źródło:
    Production Engineering Archives; 2014, 3, 2; 10-13
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving the quality of Al-Si castings by using ceramic filters
    Autorzy:
    Švecová, Ivana
    Tillová, Eva
    Kuchariková, Lenka
    Powiązania:
    https://bibliotekanauki.pl/articles/111619.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    aluminium alloy
    ceramic filters
    hardness
    porosity
    stop aluminium
    filtr ceramiczny
    odlew aluminiowy
    jakość odlewów
    twardość
    porowatość
    Opis:
    The use of cast aluminium has still increased, so have the mechanical property requirements. By casting and also in other metallurgical processes, the inclusions enter to the molten aluminium alloy and it exhibits poor ductility or toughness. It can cause a variety of problems in the manufacture of aluminium alloy castings. Therefore, the purification of the molten aluminium alloy is one of the most important processes for improving the quality of Al-products. Filters have been used for many years in order to improve the quality of castings. The inclusions in molten secondary AlSi7Mg0.3 cast were removed using depth filtration by ceramic foam filters of 20 ppi porosity. Were used 4 types of ceramic filters in 2 thicknesses (15 and 22 mm); Brinell hardness and porosity were measured. Quality of microstructure (occurrence of oxidic particles and larger non-metallic inclusions) was observed. Experimental results show that the insertion of ceramic filters into the inlet system has contributed primarily to a decrease in porosity. On the microstructure, the inclusion of filters was not significantly reflected.
    Źródło:
    Production Engineering Archives; 2020, 26; 19-24
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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