|
|
Shoulder milling of stainless steels
Holeček, Václav ; Kalivoda, Milan (referee) ; Humár, Anton (advisor)
The bachelor thesis talks about sholder milling of stainless steel. The first part deals with the general thesis including shoulder milling with the of division milling tools. Further stainless steel is described including its machinability. The main part is analyses mills for shoulder milling made by world´s producers, which are finally eva-luated from differen points of view.
|
|
|
Impregnation of stainless steels for the conditions of oversea sailing
Chára, Tomáš ; Kalina, Lukáš (referee) ; Zmrzlý, Martin (advisor)
This thesis deals with temporary corrosion protection of stainless steel for the conditions of oversea sailing. At first the theoretical part describes types of the stainless steels focusing on their corrosion resistance and negatively or positively impacts affect of their resistance. There is also a proposal of methods of the temporary corrosion protection and testing its effectiveness. The recherché are summarized knowledge in testing resistance of stainless steels to pitting corrosion. The task of the study was to test the effectiveness of three different preservatives and comparing the quality of their temporary corrosion protection compared with unprotected chemically passivated stainless steels.
|
|
|
Stainless steels
Chára, Tomáš ; Kalina, Lukáš (referee) ; Zmrzlý, Martin (advisor)
This thesis deals with stainless steels. The theoretical part describes the mechanisms and types of corrosion. Then the thesis deals with the properties, distribution and manufacture of the stainless steels and a brief description of the XPS method used for the practical part. In the recherche section summarizes the ways of using the XPS method for determining the quality of the passive layer of stainless steels eaten in different environments. Practical task was to compare the quality of the passive layer of stainless steels resulting from natural and chemical passivation.
|
|
|
Metal Biocompatible Materials
Stejskal, Pavel ; Němec, Karel (referee) ; Molliková, Eva (advisor)
The bachelor’s thesis deals with metal biocompatible materials, their chemical composition, heat treatment, final mechanical properties and possibilities of application of these materials. Basic terms and separation of the biocompatible materials are explained in thesis introduction. Next there are outlined a historical side and main reasons of development of these materials.
|
|
| |
|
|
Comparison of manual laser and TIG welding
Černý, Jan ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
The diploma thesis deals with the comparison of TIG welding methods (141) and unconventional methods of manual laser welding (51) of thin sheets of stainless steel X5CrNi 18-10. The goal of the thesis is to determine the difference in quality between the selected methods on the welds made and to develop a technical and economic evaluation. At the beginning of the diploma thesis, a literary study is analyzed with a focus on the principle of individual welding methods, possible defects arising during welding and the weldability of individual types of stainless steels. In the experimental part, the design of the experiment is discussed, which consisted in welding samples of selected weld joints using individual technologies. The welds were then evaluated using non-destructive and destructive tests. Finally, the economic evaluation of both technologies and the return of the equipment were also calculated.
|
|
|
Segregation during solidification in austenitic-ferritic stainless steels
Kejha, Richard ; Čech, Jan (referee) ; Pernica, Vítězslav (advisor)
The master thesis deals with processes of segregation in austenitic-ferritic stainless steels. The introductory part consists of characteristics features of austenitic-ferritic steels and theoretical analysis of segregation processes. The second part shows practical measurements of segregation in experimental casting. Macrosegregation was measured on a spectrometric analyzer and simultaneously solved in the simulation program MAGMA. The aim of this thesis is to verify the effect of solidification time and dwell time between liquidus and solidus temperature on the chemical heterogeneity of duplex stainless steel casting of about 500 [mm]. Chemical heterogeneity was solved for selected alloying and accompanying elements such as C, Mo, Ni, Mn, Cr. The microsegregation was not addressed. Comparison of the mechanical properties of cast and heat treated duplex steel was done by tensile testing of samples cut from the center of the casting.
|
|
|
Production and properties of austenitic steels
Líkař, Martin ; Bořil, Petr (referee) ; Ostratický, Marek (advisor)
The bachelor thesis describes production of austenitic steels and their properties. First part of thesis contains general overview of austenitic steels and their division according to chemical composition. The second part includes production, which deals with secondary metallurgy. The third part deals with properties of austenitic steels, where is mentioned their use in practise. The aim is to develop research describing production, properties and composition of austenitic steels in view of their utilization.
|
|
|
Corrosion resistant and heat resistant steels
Kříž, Petr ; Tulka, Jaromír (referee) ; Molliková, Eva (advisor)
This bachelor thesis deals with stainless steels and heat resistant steels. It speaks about their chemical composition, heat treatment, structure and options of its practical usage in various fields. One of its parts is also focused on corrosion in general, corrosion types, economic impacts, kinds of corrosion attacks and factors which affect her.
|
|
|
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.
|
guest ::
