Search for dissertations about: "Cooling curves"

Showing result 1 - 5 of 17 swedish dissertations containing the words Cooling curves.

  2. 1. Cracking during Continuous Casting of Steels : Analysis tools and procedures to identify their causes on microalloyed steel slabs

    Author : Rosa Maria Pineda Huitron; Esa Vuorinen; Pavel Ernesto Ramí­rez López; Maria Begoña Santillana; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transverse corner cracks; Continuous Casting; Microalloyes steels; Secondary cooling; Cooling curves; Crack susceptibility; Engineering Materials; Materialteknik;

    Abstract : Transverse corner cracks are one of the most common but complex defects formed in microalloyed steels during continuous casting (CC). Such cracks are detrimental because it leads to a loss in productivity with a great impact on environment, energy and economics for several steel making companies all over the world. READ MORE

  4. 2. Crystallization of Parabens : Thermodynamics, Nucleation and Processing

    Author : Yang Huaiyu; Åke Rasmuson; Joop ter Horst; KTH; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; NATURAL SCIENCES; MEDICAL AND HEALTH SCIENCES; Nucleation; Induction time; Interfacial energy; Ethyl paraben; Propyl paraben; Butyl paraben; Methanol; Ethanol; Propanol; Acetone; Ethyl acetate; Solubility; Thermodynamics; Activity; Activity coefficient; Liquid-liquid phase separation; Ternary phase diagram; Melting point; Boiling point; Polarity; Cooling crystallization; Sandwich crystal; Porous; Particle Vision and Measurement; Focused Beam Reflectance Method; Infrared Spectroscopy; Confocal Raman Microscopy; X-Ray Diffraction; Differential Scanning Calorimetry; SRA - E-vetenskap SeRC ; SRA - E-Science SeRC ;

    Abstract : In this work, the solubility of butyl paraben in 7 pure solvents and in 5 different ethanol-water mixtures has been determined from 1 ˚C to 50 ˚C. The solubility of ethyl paraben and propyl paraben in various solvents has been determined at 10 ˚C. READ MORE

  5. 3. Cracking in concrete : crack prevention with air-cooling and crack distribution with steel fibre reinforcement

    Author : Patrik Groth; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Abstract : This Licentiate Thesis consists of four parts. The first two parts, paper A and B, deal with air-cooling by means of embedded pipes in order to reduce thermal cracking in concrete structures. These two papers are submitted for publication to RILEM Journal; ‘Materials and Structures'. READ MORE

  6. 4. Investigations intothe crystallization of butyl paraben

    Author : Huaiyu Yang; Åke Rasmuson; Mårten Behm; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Butyl paraben; Solubility; Thermodynamic; Activity; Activity coefficient; Second order correlation; Liquid-liquid phase separation; Ternary phase diagram; Nucleation; Induction time; Free energy; Interfacial energy; Nuclei critical radius Cooling crystallization; Evaporation crystallization; Chemical engineering; Kemiteknik;

    Abstract : In thisproject, solubility of butyl paraben in 7 puresolvents and 5 ethanol aqueous solvents has been determined at from 1 ℃to 50 ℃. Thermodynamic properties of butyl paraben have been measured by DifferentialScanning Calorimetey. READ MORE

  7. 5. On the Volume Changes during the Solidification of Cast Irons and Peritectic Steels

    Author : Abel Tadesse; Michael Vynnycky; Hasse Fredriksson; Jacques Lacaze; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Volume changes; Solidification; Peritectic steel; Micro- and Macro-shrinkage; LVDT; GCI; NCI; Hypo- and Hypereutectic; Austenite; DTA; Dilatometry; BSE; Nuclei; Flake graphite; SDAS; Eutectic cells; Undercooled graphite; Simulation; Cooling rate; Microsegregation; austenite; Metastable region; δ-ferrite; Stable phase diagram; Grain refinement; Strain.; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : This thesis work deals with the volume changes during the solidification of cast irons and peritectic steels. The volume changes in casting metals are related to the expansion and/or contraction of the molten metal during solidification. Often, different types of shrinkage, namely macro- and micro-shrinkage, affect the casting quality. READ MORE