Search for dissertations about: "inclusions"

Showing result 1 - 5 of 189 swedish dissertations containing the word inclusions.

  1. 1. Growth and removal of inclusions during ladle refining

    University dissertation from Stockholm : Materialvetenskap

    Author : Mats Söder; KTH.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Meteorology; inclusions; steel; ladle; cluster growth; modelling; Meteorologi; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi;

    Abstract : The overall purpose of this thesis work has been to further our understanding of the growth and removal of inclusions in gas- and induction-stirred ladles. The primary focus has been on alumina inclusions.Growth mechanisms were studied using data from fundamental mathematical models of gas- and induction-stirred ladles. READ MORE

  2. 2. Growth and Removal of Inclusions During Ladle Stirring

    University dissertation from Stockholm : Materialvetenskap

    Author : Mats Söder; KTH.; [2001]
    Keywords : inclusions; ladle; gas-stirring; induction-stirring; secondary refining; bubble flotation;

    Abstract : 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. READ MORE

  3. 3. Some aspects of non-metallic inclusions during vacuum degassing in ladle treatment with emphasize on liquid CaO-Al2O3 inclusions

    University dissertation from Stockholm : KTH

    Author : Young Jo Kang; KTH.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusions; ladle refining; vacuum degassing; ladle glaze; spinel; SiO2 activity; agglomeration; cold model; open-eye; inclusion removal; TECHNOLOGY Chemical engineering Metallurgical process and manufacturing engineering Metallurgical process engineering; TEKNIKVETENSKAP Kemiteknik Metallurgisk process- och produktionsteknik Metallurgisk processteknik;

    Abstract : The present thesis was to study non-metallic inclusions during vacuum degassing in ladle treatment. Emphasize was mostly given to liquid CaO-Al2O3 inclusions. A series of industrial experiments were carried out at Uddeholm Tooling AB, Hagfors, Sweden. To gain an insight into the industrial findings, laboratory investigations were also performed. READ MORE

  4. 4. Impact of aluminium addition on the chemistry of non-metallic inclusions in ladle treatment

    University dissertation from Stockholm : Materialvetenskap

    Author : Kristina Beskow; KTH.; [2001]
    Keywords : Ladle treatment; Inclusions; Nucleation; Aluminium addition;

    Abstract : .... READ MORE

  5. 5. Inclusions and/or Particles Engineering for Grain Refining Purposes in Ferritic Fe-20mass%Cr alloys

    University dissertation from Stockholm : KTH

    Author : Jesper Janis; KTH.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Inclusions; Particles; Grain size; High Cr; Ferritic; Grain refining; Solidification; Pinning effect; Stainless steel; Oxides; Nitrides; TECHNOLOGY Chemical engineering Metallurgical process and manufacturing engineering Metallurgical process engineering; TEKNIKVETENSKAP Kemiteknik Metallurgisk process- och produktionsteknik Metallurgisk processteknik;

    Abstract : Compared to more common used austenitic stainless steels, ferritic stainless steels contain very low amounts of the expensive alloying element Ni. In addition, they have good corrosion properties, but are sometimes suffering from poor weldability and bad mechanical properties. READ MORE