Sökning: "stirring"

Visar resultat 1 - 5 av 63 avhandlingar innehållade ordet stirring.

  1. 1. Mechanical properties of semi-solid Al castings : Role of stirring

    Författare :Qing Zhang; Anders E.W. Jarfors; Stefan Jonsson; Tomas Liljenfors; Arne K. Dahle; Johan Ahlström; Jönköping University; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rheometal™ process; aluminum alloys; stirring; segregation; porosity; oxides; ductility; fatigue performance; melt quality;

    Sammanfattning : Aluminum castings have been widely used in the automotive industry to reduce the vehicle's weight. However, the existence of casting defects significantly limits its application. The most common and detrimental defects in aluminum castings are porosity and oxides. LÄS MER

  3. 2. Mechanical Properties of Semi-Solid Al Castings : Role of Stirring

    Författare :Qing Zhang; Anders E.W. Jarfors; Stefan Jonsson; Jens Bergström; Jönköping University; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rheometal™ process; aluminium alloys; stirring; segregation; porosity; oxides; ductility; fatigue performance;

    Sammanfattning : Semi-solid metal (SSM) casting has been widely used in automotive industries to reduce the weight. In RheoMetalTM process which is one of the variations of SSM, the slurry fabrication can be finished within 30 second and can the slurry making process can be integrated into a high pressure die casting (HPDC) route without significant adjustments, making the process a promising alternative for industrial application. LÄS MER

  4. 3. Growth and Removal of Inclusions During Ladle Stirring

    Författare :Mats Söder; KTH; []
    Nyckelord :inclusions; ladle; gas-stirring; induction-stirring; secondary refining; bubble flotation;

    Sammanfattning : The growth and removal of inclusions in stirred ladles hasbeen studied. First, the importance of different growthmechanisms suggested in the literature were studied. Simulationresults from a fundamental model of an induction-stirred ladlehave been used as input in the calculations. LÄS MER

  5. 4. Pores, inclusions and electromagnetic stirring : Topics from the continuous casting of steel

    Författare :Arash Safavi Nick; Pär Jönsson; Michael Vynnycky; Jesper H. Hattel; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : This thesis deals with two topics of relevance to the continuous casting of steel,in view of their importance as regards the quality of the final solidified structure.The first concerns the precipitation of gas pores and inclusions in the interden-dritic region of the solidifying metal. LÄS MER

  7. 5. Study of the slag-metal interaction in ladle treatment

    Författare :Pranesh Dayal; Du Sichen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; slag-metal; mixing; interface; induction stirring; gas stirring; ladle treatment; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Sammanfattning : .... LÄS MER