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  • Characteristics of hot extrudes PM high-speed steels manufactured from water atomized powders
    Šuštaršič, Borivoj ...
    The applicability of water atomized powders and hot extrusion for the preparation of good-quality high-speed steels was investigated. Water atomized powders of two different chemical compositions ... were prepared. The chemical and physical properties of prepared powders were determined. Water atomized powders were then cold isostatically pressed (CIP) and vacuum sintered. Sintered preforms were then hot extruded. From soft-annealed extruded billts cylindrical specimens for mechanical testing were prepared. After vacuum heat treatment of specimens thir main mechanical properties were determined. Density measurements and metallographic examinations of samples showed almost complete densifiction and a superior small-grain microstructure.The resulting mechanical properties of PM high-speed steels prepared from water atomized powders show that the PM route: water atomization ▫$\Rightarrow$▫ CIP ▫$\Rightarrow$▫ vacuum sintering ▫$\Rightarrow$▫ hot extrusion could be a useful process in the production of simple to complex profile-shaped billets from good-quality high-speed steels.
    Vir: Metalurgija = Metallurgy. - ISSN 0543-5846 (Vol. 34, br. 3, srpanj/rujan 1995, str. 91-99)
    Vrsta gradiva - članek, sestavni del
    Leto - 1995
    Jezik - angleški
    COBISS.SI-ID - 1194

vir: Metalurgija = Metallurgy. - ISSN 0543-5846 (Vol. 34, br. 3, srpanj/rujan 1995, str. 91-99)
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