Sökning: "härdning av stål"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden härdning av stål.

  1. 1. Precipitation analysis in bearing steel Hybrid 60

    Master-uppsats, KTH/Materialvetenskap

    Författare :Rebecca Rosén; [2023]
    Nyckelord :martensitic steel; secondary hardening; precipitation; PRISMA; martensitiskt stål; sekundärhärdning; utskiljning; PRISMA;

    Sammanfattning : New materials are always being developed to get the best properties possible where needed. The way to create these materials and test them is also developing. When it comes to high-strength steels, a martensitic microstructure is a common choice. LÄS MER

  3. 2. Linkage of Macro- and Micro-scale Modelling Tools for Additive Manufacturing

    Master-uppsats, KTH/Materialvetenskap

    Författare :Julia Sjöström; [2020]
    Nyckelord :Maraging steel; selective laser melting; temperature evolution; macro-scale modelling; segregation; ICME.;

    Sammanfattning : Additive manufacturing methods for steel are competing against commercial production in an increasing pace. The geometry freedom together with the high strength and toughness due to extreme cooling rates make this method viable to use for high-performance components. The desirable material properties originate from the ultrafine grain structures. LÄS MER

  4. 3. Characterization of Secondary Carbides in Low-Alloyed Martensitic Model Alloy Tool Steels

    Master-uppsats, KTH/Materialvetenskap

    Författare :Jubica Jubica; [2020]
    Nyckelord :martensitic steel; secondary hardening; precipitation; STEM; EDS; Prisma; size distribution; martensitiskt stål; sekundärhärdning; utskiljning; STEM; EDS; PRISMA; storleksfördelning;

    Sammanfattning : The development of tool steels for making and shaping other materials requires a better understanding of the material's properties during manufacture. These high-quality steels include many alloying elements, which give increased hardness during tempering. For producing hardened microstructures, austenite generation is essential. LÄS MER

  5. 4. Hållbara spårvägar

    Kandidat-uppsats, Uppsala universitet/Institutionen för teknikvetenskaper

    Författare :Johanna Dahlström; Licette Hansen; Ellen Hartel; Francesca Larsson; Hanna Pettersson; [2019]
    Nyckelord :materials; trams; tram rails; surface treatments; surface modification; tramway tracks; sustainability; carbon dioxide emissions; material; spårvagnar; räler; stål; ytbehandlingar; spårväg; hållbarhet; koldioxidsutsläpp;

    Sammanfattning : The Swedish city of Uppsala is growing and will be expanded. To manage the increase in traffic, a tramway is being planned. It is vital to make the construction and the tramway tracks sustainable. This is explored to study carbon dioxide emissions related to tramway track materials as well as their wear and service life. LÄS MER

  7. 5. A Study of Various Parameters Affecting Adhesion of Coatings to Metal Substrates

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Worabhorn Pathanatecha; [2019]
    Nyckelord :adhesion; coatings; metal substrates; silanes; polyurethanes; surface energy; crosslinking agent; adhesion promoters; vidhäftning; beläggningar; metallunderlag; silaner; polyuretaner; ytenergi; tvärbindningsmedel; vidhäftningspromotor;

    Sammanfattning : The adhesion of coatings is of high importance in the coating industry and a more thorough understanding of adhesion behavior is required. In this thesis work, seven parameters affecting adhesion of silane-modified poly(urethane urea) (PUSi) coatings on pretreated steel and aluminum substrates were studied. LÄS MER