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Microstructure of high-alloy steels
Feller, Šimon ; Bořil, Petr (referee) ; Ostratický, Marek (advisor)
This bachelor thesis concerns formation of microstructure of high-alloy steels. In theoretic part there is summary of sorting high-alloy steels, possible structures and how these structures affect qualities of steel. For practical part two small experimental casts were created, which tried to imitate composition and structure of two another, much bigger casts. Microstructure, makrostructure and grain boundary segregation were compared.
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Macrosegregation and microsegregation in austenitic CrNi steels
Ostratický, Marek ; Čech, Jan (referee) ; Záděra, Antonín (advisor)
This diploma thesis deals with segregation cycles in austenitic CrNi steels. In first section deals with theory of macrosegregation and microsegregation cycles. The second part is focused on this cycles in experimental casting. Macrosegregation was measured by spectrometric analyser and by MAGMA simulation program. Microsegregation was measured by electron microscope. The aim of this diploma thesis is verify the influence of setting conditions on heterogenity chemical composition in austenitic CrNi steel. For experimental casting with a wall thickness of about 500 mm will be verified effect of the setting time, residence time between solid and liquid phases and others parameters for macrosegregation and microsegregation in selected elements.
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Microstructure of high-alloy steels
Feller, Šimon ; Bořil, Petr (referee) ; Ostratický, Marek (advisor)
This bachelor thesis concerns formation of microstructure of high-alloy steels. In theoretic part there is summary of sorting high-alloy steels, possible structures and how these structures affect qualities of steel. For practical part two small experimental casts were created, which tried to imitate composition and structure of two another, much bigger casts. Microstructure, makrostructure and grain boundary segregation were compared.
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Macrosegregation and microsegregation in austenitic CrNi steels
Ostratický, Marek ; Čech, Jan (referee) ; Záděra, Antonín (advisor)
This diploma thesis deals with segregation cycles in austenitic CrNi steels. In first section deals with theory of macrosegregation and microsegregation cycles. The second part is focused on this cycles in experimental casting. Macrosegregation was measured by spectrometric analyser and by MAGMA simulation program. Microsegregation was measured by electron microscope. The aim of this diploma thesis is verify the influence of setting conditions on heterogenity chemical composition in austenitic CrNi steel. For experimental casting with a wall thickness of about 500 mm will be verified effect of the setting time, residence time between solid and liquid phases and others parameters for macrosegregation and microsegregation in selected elements.
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