VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Influence of the size and content of precipitates on mechanical properties of maraging steel 1.2799
    Grum, Janez, 1946- ; Zupančič, Martin, 1965- ; Slabe, Janez Marko
    Desired mechanical properties of maraging steels are achieved by precipitation annealing. After precipitation annealing, maraging steels show a favourable combination of mechanical properties which ... makes them suitable for manufacture of very exacting die-casting tools. It has turned out that maraging steels fulfil specific technical as well as economic requirements of manufacture and use of die-casting tools, which results in an extended life if compared to conventional hot-working tools, i.e., H11 and H13. Consequently, the aim of our research was to investigate influences exerted on mechanical microstructural properties of such steels. Thus maraging steel Thyssen Thyrotherm 1.2799 was subjected to precipitation hardening under various temperature/time conditions. After hardening, suitability of individual theoretical equations of hardening was verified, on the basis of data on mechanical properties and the data obtained in microstructure analyses with optical and electronic microscopes. In the determination of the utmost, still admissible size of the precipitated phases to achieve optimum mechanical properties, the basic Kelly's and Orowan's model was used. This model describes the influence of the precipitated phases on shear stress required for gliding of dislocations. By verifying the accordance between the theoretical and practical relationships between a change of hardness and a size of the precipitated phase, it was confirmed that it was possible to control the achieved mechanical properties of maraging steel with the known microstructure components, i.e., the precipitated phases.
    Vir: Integration of heat treatment and surface engineering in the manufacture of engineering components : proceedings (Str. 157-165)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2001
    Jezik - angleški
    COBISS.SI-ID - 4730395

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