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    Wyświetlanie 1-2 z 2
    Tytuł:
    Influence of load and reinforcement content on selected tribological properties of Al/SiC/Gr hybrid composites
    Autorzy:
    Veličković, S.
    Miladinović, S.
    Stojanović, B.
    Nikolić, R. R.
    Hadzima, B.
    Arsić, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/111714.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    aluminum alloy
    hybrid composites
    silicon carbide
    graphite
    particles
    stop aluminium
    węglik krzemu
    grafit
    kompozyty hybrydowe
    Opis:
    Hybrid materials with the metal matrix are important engineering materials due to their outstanding mechanical and tribological properties. Here are presented selected tribological properties of the hybrid composites with the matrix made of aluminum alloy and reinforced by the silicon carbide and graphite particles. The tribological characteristics of such materials are superior to characteristics of the matrix – the aluminum alloy, as well as to characteristics of the classical metal-matrix composites with a single reinforcing material. Those characteristics depend on the volume fractions of the reinforcing components, sizes of the reinforcing particles, as well as on the fabrication process of the hybrid composites. The considered tribological characteristics are the friction coefficient and the wear rate as functions of the load levels and the volume fractions of the graphite and the SiC particles. The wear rate increases with increase of the load and the Gr particles content and with reduction of the SiC particles content. The friction coefficient increases with the load, as well as with the SiC particles content increase.
    Źródło:
    Production Engineering Archives; 2018, 18; 18-23
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reparation of damaged forging dies by hard facing (HF) technology
    Autorzy:
    Lazic, V.
    Arsic, D.
    Nikolic, R. R.
    Aleksandrovic, S.
    Milosavljevic, D.
    Djordjevic, M.
    Cukic, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/111606.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    forging dies
    hard facing (HF)
    filler metals (FM)
    hardness
    microstructure
    matryce kuźnicze
    napawanie
    spoiwa
    twardość
    mikrostruktura
    Opis:
    The forging dies are in exploitation exposed to elevated temperatures and variable impact loads, both compressive and shear. Steels for manufacturing of these tools must endure those loads while maintaining mechanical properties and being resistant to wear and thermal fatigue. For those reasons, the alloyed steels are used for making the forging dies, though they have less weldability, because alloying increases proneness to hardening. Any reparatory hard facing (HF) of the damaged dies would require the specially adjusted technology to the particular piece. In this paper reparatory hard facing of dies used for forging pieces in the automobile industry is considered. Prior to reparatory hard facing of the real tools, numerous experimental hard facings on models were performed. All the model hard facings were done on the same steels which were used for production of the real forging dies. To define the optimal hard facing technology one needs to derive the optimal combination of the adequate heat treatment(s), to select the proper filler metals and the welding procedure. The established optimal HF technology was applied to real forging dies whose service life was further monitored in conditions of exploitation.
    Źródło:
    Production Engineering Archives; 2015, 6, 1; 26-29
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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