Sökning: "casting"

Visar resultat 1 - 5 av 307 avhandlingar innehållade ordet casting.

  1. 1. Gjutningens arenor : Metallhantverkets rumsliga, sociala och politiska organisation i södra Skandinavien under bronsåldern

    Författare :Anna Sörman; Anders Andrén; Alison Klevnäs; Christopher Prescott; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Bronze Age; southern Scandinavia; bronze casting; metalworking; craft production; craft organisation; workshops; social organisation; elite; heterarchy; prestige goods; social reproduction; arkeologi; Archaeology;

    Sammanfattning : Production and use of metalwork in southern Scandinavia during the Bronze Age (1700-500 BC) has above all been attributed to emerging elites. That bronze was a source and medium for social power is evident from its use in socio-political and ritual spheres, the multiple skills and elaborate aesthetics involved in its crafting, and the arenas for influence and control offered by the acquisition of metals through long-distance exchange. LÄS MER

  3. 2. A Study of the Initial Mould Filling during Up-hill Ingot Casting

    Författare :Line Hallgren; Pär Jönsson; Anders Tilliander; Seppo Louhenkilpi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; swirling flow; up-hill teeming; nozzle; casting; fluid flow; modelling; CFD; LDA; swirl; ingot casting; filling; red eye;

    Sammanfattning : The fluid flow in the mould during up-hill teeming is of great importance for the quality of the cast ingot and thereby the quality of the final steel products. At the early stage of the filling of an up-hill teeming mould, liquid steel flows with a high velocity from the runner into the mould. LÄS MER

  4. 3. The double axe in Minoan Crete : a functional analysis of production and use

    Författare :Maria Lowe Fri; Charlotte Scheffer; Lena Sjögren; Doniert Evely; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Bronze Age Crete; Minoan period; double axe; casting; casting defects; finishing treatment; experimental archaeology; use-wear; use; user; Archaeology; classical; Arkeologi; klassisk; antikens kultur och samhällsliv; Classical Archaeology and Ancient History;

    Sammanfattning : This study examines the production and use of Minoan double axes with the aim of finding out what working activities they were used for. The double axe has earlier been associated with a woodworker, a carpenter, a stonemason and a butcher. LÄS MER

  5. 4. Wheat Gluten -Based Materials and Composites: Extrusion, Casting and Antimicrobial Properties

    Författare :Hasan Türe; Mikael Hedenqvist; José-Maria Lagaron; KTH; []
    Nyckelord :wheat gluten; extrusion; urea; montmorillonite; sol-gel process; hybrid materials; casting; compression moulding; potassium sorbate; antifungal; plasticiser; thermal; mechanical and barrier properties.;

    Sammanfattning : The use of bio-based polymers as packaging materials has gained much attention due to increasing environmental concerns regarding non-biodegradable petroleum-derived plastics. Wheat gluten (WG) is a valuable renewable resource for the production of bio-based materials because of its low price, biodegradability, good film-forming properties and good gas barrier properties under dry conditions. LÄS MER

  7. 5. Some aspects of convection as well as graphite and carbide formations during casting

    Författare :Fareed Ashraf Khan; Michael Vynnycky; Pär Jönsson; Bo Rogberg; Hasse Fredriksson; Jessica Elfsberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; carbides; heat treatment; cast iron; ball bearing steel; casting; cooling rate; structure analysis; nodule distribution; melt stirring; nuclei; karbider; värmebehanding; gjutjärn; kullagerstål; gjutning; kylningshastighet; strukturanalys; nodulefördelning; smältrörelse; kärnor.; Metallurgical process science; Metallurgisk processvetenskap;

    Sammanfattning : It is an established fact that segregation during casting affects the physical properties of carbon-based ferro alloys; this motivates the study of the segregation behaviour of carbon and carbide-forming solute elements. In this context, this thesis investigates two different situations: the effects of cooling rate and turbulence on the precipitation behaviour of the graphite nodules in nodular cast iron; the nature of carbide precipitation in a bearing steel grade and the effects of subsequent soaking on these carbides. LÄS MER