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Decarburisation and degassing of high-alloyed Cr steels under vacuum
Ertelt, Tomáš ; Pernica, Vítězslav (referee) ; Záděra, Antonín (advisor)
The work deals with the investigation of the effects of vacuum degassing and decarburization in high alloyed stainless steel. The reason for this is to increase corrosion resistance and mechanical properties. The theoretical part is devoted to the analysis of options to reduce carbon, nitrogen, hydrogen and manganese at atmospheric pressure and in vacuum. In experimental part there is the description of melting, calculation of conditions facilitating reduction of oxide inclusions as a function of the gas pressure in the furnace and the evaluation of the influence of vacuum on the content reduction of carbon, nitrogen and manganese.
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Secondary metallurgy in foundries
Klika, Jiří ; Šenberger, Jaroslav (referee) ; Pernica, Vítězslav (advisor)
The aim of this bachelor thesis is to write a literary research about various methods of secondary metallurgy. In the thesis is described principle of methods and its advantages and disadvantages after installation in the manufactory, especially principle of steelmaking methods. It mainly concerns advantages of secondary metallurgy as degassing, decarburisation, desulphurisation and chemical or heat homogenization of liquid metal in the ladle.
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Manufacture and properties of heat resistant alloys
Majchrák, Aleš ; Myška, Martin (referee) ; Záděra, Antonín (advisor)
This bachelor thesis deals with heat resistant alloys, specifically with superalloys and high entropy alloys. The theoretical part includes distribution of those alloys by their chemical composition, description of their properties, microstructure and applications. Experimental part is devoted to cobalt alloy UmCo50. Aims of this part include metallurgy process description of this alloy, verification of vacuuming time influence on decarburization, microstructure observation and its conclusion.
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Manufacture and properties of heat resistant alloys
Majchrák, Aleš ; Myška, Martin (referee) ; Záděra, Antonín (advisor)
This bachelor thesis deals with heat resistant alloys, specifically with superalloys and high entropy alloys. The theoretical part includes distribution of those alloys by their chemical composition, description of their properties, microstructure and applications. Experimental part is devoted to cobalt alloy UmCo50. Aims of this part include metallurgy process description of this alloy, verification of vacuuming time influence on decarburization, microstructure observation and its conclusion.
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Secondary metallurgy in foundries
Klika, Jiří ; Šenberger, Jaroslav (referee) ; Pernica, Vítězslav (advisor)
The aim of this bachelor thesis is to write a literary research about various methods of secondary metallurgy. In the thesis is described principle of methods and its advantages and disadvantages after installation in the manufactory, especially principle of steelmaking methods. It mainly concerns advantages of secondary metallurgy as degassing, decarburisation, desulphurisation and chemical or heat homogenization of liquid metal in the ladle.
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Decarburisation and degassing of high-alloyed Cr steels under vacuum
Ertelt, Tomáš ; Pernica, Vítězslav (referee) ; Záděra, Antonín (advisor)
The work deals with the investigation of the effects of vacuum degassing and decarburization in high alloyed stainless steel. The reason for this is to increase corrosion resistance and mechanical properties. The theoretical part is devoted to the analysis of options to reduce carbon, nitrogen, hydrogen and manganese at atmospheric pressure and in vacuum. In experimental part there is the description of melting, calculation of conditions facilitating reduction of oxide inclusions as a function of the gas pressure in the furnace and the evaluation of the influence of vacuum on the content reduction of carbon, nitrogen and manganese.
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