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    Wyświetlanie 1-3 z 3
    Tytuł:
    Selection of Casting Materials for Working Parts of Machines for the Forestry Sector
    Autorzy:
    Pirowski, Zenon
    Bitka, Adam
    Grudzień-Rakoczy, Małgorzata
    Małysza, Marcin
    Pysz, Stanisław
    Wieliczko, Piotr
    Wilk-Kołodziejczyk, Dorota
    Powiązania:
    https://bibliotekanauki.pl/articles/2106604.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mulching
    forestry tools
    tribological wear
    abrasion-resistant cast steel
    hardfacing surface
    Opis:
    The article was created as a result of the work TECHMATSTRATEG 1 program “Modern Material Technologies” as part of the project with the acronym INNOBIOLAS entitled “Development of innovative working elements of machines in the forestry sector and biomass processing based on high-energy surface modification technologies of the surface layer of cast elements”; agreement No. TECHMATSTRATEG1/348072/2/NCBR/2017. The article discusses the procedure for selecting casting materials that can meet the high operational requirements of working tools of mulching machines: transfer of high static and dynamic loads, resistance to tribological wear, corrosion resistance in various environments. The mulching process was briefly described, then the alloys were selected for experimental tests, model alloys were made and perform material tests were carried out in terms of functional and technological properties. The obtained results allowed to select the alloy where the test castings were made.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 2; 743--752
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tribological Response of Heat Treated AISI 52100 Steels Against Steel and Ceramic Counterparts
    Autorzy:
    Türedi, E.
    Yilmaz, M.
    Senol, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/382223.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wear resistant alloys
    heat treatment
    bearing steel
    tribology
    microscopy
    stopy odporne na zużycie
    obróbka cieplna
    stal łożyskowa
    trybologia
    mikroskopia
    Opis:
    AISI 52100 bearing steels are commonly used in applications requiring high hardness and abrasion resistance. The bearing steels are working under dynamic loads in service conditions and their toughness properties become important. In order to provide the desired mechanical properties, various heat treatments (austenizing, quenching and tempering) are usually applied. In this study, AISI 52100 bearing steel samples were austenized at 900°C for ½ h and water quenched to room temperature. Then tempering was carried out at 795°C, 400°C and 200°C for ½ h. In order to investigate the effect of heat treatment conditions on wear behavior, dry friction tests were performed according to ASTM G99-05 Standard with a ‘ball-on-disk’ type tribometer. The samples were tested against steel and ceramic counterparts using the parameters of 100 m distance and 30 N load and 0.063 m/s rotational speed. After wear test, the surface characterization was carried out using microscopy. Wear loss values were calculated using a novel optical method on both flat and counterpart specimens.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 222-228
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Rare Earth Metal Addition on Wear Resistance of Chromium-Molybdenum Cast Steel
    Autorzy:
    Kasińska, J.
    Kalandyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/381581.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wear resistant alloys
    cast steel
    rare earth metals
    Miller test
    surface profile
    stopy odporne na zużycie
    stal
    metale ziem rzadkich
    test Millera
    profil powierzchni
    Opis:
    This paper discusses changes in the microstructure and abrasive wear resistance of G17CrMo5-5 cast steel modified with rare earth metals (REM). The changes were assessed using scanning microscopy. The wear response was determined in the Miller test to ASTM G75. Abrasion tests were supplemented with the surface profile measurements of non-modified and modified cast steel using a Talysurf CCI optical profilometer. It was demonstrated that the modification substantially affected the microstructure of the alloy, leading to grain size reduction and changed morphology of non-metallic inclusions. The observed changes in the microstructure resulted in a three times higher impact strength (from 33 to 99 kJ/cm2) and more than two times higher resistance to cracking (from 116 to 250 MPa). The following surface parameters were computed: Sa: Arithmetic mean deviation of the surface, Sq: Root-mean-square deviation of the surface, Sp: Maximum height of the peak, Sv: Maximum depth of the valley, Sz: Ten Point Average, Ssk: Asymmetry of the surface, Sku: Kurtosis of the surface. The findings also indicated that the addition of rare earth metals had a positive effect on the abrasion behaviour of G17CrMo5-5 cast steel.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 63-68
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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