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    Wyświetlanie 1-2 z 2
    Tytuł:
    Effect of Post-Heat Treatment on Microstructure and Mechanical Properties of Cu-Fe-Co Powder Alloy Fabricated by Hot Pressing
    Autorzy:
    Çelik, E.
    Aslan, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/353200.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    diamond cutting tools
    Cu-Fe-Co alloy
    powder metallurgy
    hot pressing
    heat treatment
    Opis:
    In this study, the powder mixture which consists of Cu-Fe-Co was produced by using the method of hot pressing technique. In addition, effect of heat treatment process on microstructure and mechanical properties of this alloy was investigated. Following the hot pressing process applied on the samples, heat treatment was carried out at 950°C for two different dwelling times (90 and 180 minutes). Measured density values were considered as physical characteristics, while hardness and fracture strength values were considered as mechanical characteristics. It was observed that porosity rates of hot pressed samples were decreased by increasing of temperature and pressing parameters. In this study it was observed that Cu was spread in matrix and filled the micro porosities. Hardness values were determined to be decreased as a result of grain growth after heat treatment process. That 4 fold increased elongation % values which were achieved by TRS experiments were observed as well.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 371-377
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combined Effect of CrB2 Micropowder and VN Nanopowder on the Strength and Wear Re-sistance of Fe‒Cu–Ni–Sn Matrix Diamond Composites
    Autorzy:
    Ratov, Boranbay
    Mechnik, Volodymyr
    Rucki, Miroslaw
    Gevorkyan, Edwin
    Kilikevicius, Arturas
    Kolodnitskyi, Vasyl
    Siemiatkowski, Zbigniew
    Umirova, Gulzada
    Chałko, Leszek
    Józwik, Jerzy
    Zhanggirkhanova, Arailym
    Chishkala, Vladimir
    Korostyshevskyi, Dmytro
    Powiązania:
    https://bibliotekanauki.pl/articles/2201897.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    diamond composite
    electroconsolidation
    composite microstructure
    adhesion
    CrB2
    VN nanopowder
    micropowder
    VN
    wear resistance
    cutting tools
    mining tools
    Opis:
    The paper presents research results on the enhancement of diamond composites designed for tools application for mining industry, hard rocks cutting, able to withstand harsh conditions under heavy dynamical loads. In the present study, both CrB2 micropowder and VN nanopowder additives were used in proportions up to 5 wt.% and 6 wt.%, respectively, together with the basic matrix composition of 51 wt.% Fe, 32 wt.% Cu, 9 wt.% Ni, and 8 wt.% Sn. Addition of both components, CrB2 and VN, appeared to be ad-vantageous in proportion of 2 wt.% and 4 wt.%, respectively. This composition exhibited the highest relative density of 0.9968, better than that without additives. Similarly, the highest values of compressive strength Rcm and flexural strength Rbm were reached for the composite with the same percentage of CrB2 and VN. Compared to the composite with no addition of CrB2 and VN, Rcm improved by almost 70%, while Rbm by 81%. Additionally, the abovementioned additives enhanced the ability of the matrix to prevent the diamond reinforcement from being torn out of the composite, which is very important under harsh working conditions of the cutting tools. The presence of CrB2 micropowder and VN nanopowder promoted densification of the matrix and adhesion between the diamond grits and the Fe‒Cu–Ni–Sn matrix.
    Źródło:
    Advances in Science and Technology. Research Journal; 2023, 17, 1; 23--34
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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