Search for dissertations about: "Non-metallic Inclusions"

Showing result 21 - 25 of 39 swedish dissertations containing the words Non-metallic Inclusions.

  2. 21. Influence of Ferrochromium and Ferromanganese Additions on Inclusion Characteristics of Steel

    Author : Thobias Sjökvist; KTH; []
    Keywords : Non-metallic inclusions; Ferroalloys; Ferrochromium; Ferromanganese; SEM; Microprobe; Steel; Fullscale; SS111116; Bearing Steel;

    Abstract : .... READ MORE

  4. 22. A study of mold flux entrapment and gas entrainment in an ingot casting process

    Author : Jun Yin; Mikael Ersson; Pär Jönsson; Yogeshwar Sahai; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mold flux entrapments; CFD; Gas entrainment; Ingot casting process; Uphill teeming process; Side teeming process; Numerical simulation; Non-metallic inclusions; Metallurgical process science; Metallurgisk processvetenskap; Materials Science and Engineering; Teknisk materialvetenskap;

    Abstract : The focus of this work is to study the gas entrainment and mold flux entrapments during the ingot filling process based on physical and numerical modelling.The formation of the free surface was investigated in the uphill teeming method, which illustrates a dynamic change at a quasi-steady state. READ MORE

  5. 23. Parameters influencing inclusion compositions in Al-killed steel melts during a secondary refining process

    Author : Takanori Yoshioka; Andrey Karasev; Pär Jönsson; Joohyun Park; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusion; ladle furnace; RH; thermodynamics; contact angle; Al2O3; MgO•Al2O3 spinel; calcium aluminate; CaS.;

    Abstract :      This study was carried out to clarify the factors influencing the evolution of inclusions in Al-killed steel melts during a secondary refining process. First, a case-hardening steel was the subject of study to understand the factors influencing the inclusion compositions in the steel melt. READ MORE

  6. 24. Microstructure and Fatigue Analysis of PM-HIPed Alloys : A Focus on Inconel 625 and High-Nitrogen Tool Steel

    Author : Faezeh Javadzadeh Kalahroudi; Mikael Grehk; Mattias Calmunger; Karlstads universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; powder metallurgy; hot isostatic pressing; Inconel 625; high-nitrogen tool steel; microstructure; fatigue behavior; inclusions; Materialteknik; Materials Engineering;

    Abstract : Nickel-based superalloys and tool steels are well-known high-performance alloys due to their extensive use in many different industries. Nickel-based superalloys have found their way into aircraft, aerospace, marine, chemical, and petrochemical industries owing to their excellent high-temperature corrosion and oxidation resistance. READ MORE

  7. 25. A Study on Particle Motion and Deposition Rate : Application in Steel Flows

    Author : Peiyuan Ni; Pär Jönsson; Lage Jonsson; Mikael Ersson; Stein Tore Johansson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; steel flow; ladle teeming; continuous casting; non-metallic inclusion behavior; particle deposition; nozzle clogging; numerical simulation.;

    Abstract : Non-metallic inclusions in molten steel have received worldwide attention due to their serious influence on both the steel product quality and the steel production process. These inclusions may come from the de-oxidation process, the re-oxidation by air and/or slag due to an entrainment during steel transfer, and so on. READ MORE