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Electron beam welding technology
Skalka, Jan ; Vaněk, Mojmír (referee) ; Richter, Tomáš (advisor)
The bachelor thesis is devoted to analysis of electron beam welding technology. It is unconventional method of welding characterized by high quality weld and narrow heat-affected zone of welded parts. This technology, due to its development and qualities, has found its application in many industries, primarily in aviation and astronautics. The vacuum is limiting feature of this method and it is necessary for electron beam welding. However, even in this area, the development of new technologies have not stopped and generates concrete solutions to those problems. The thesis is also focused on elektron beam welding of rotary parts in the piece and serial production.
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Optimalization of plasma cutting parameters.
Vacula, Jakub ; Mrňa, Libor (referee) ; Daněk, Ladislav (advisor)
VACULA Jakub: Optimization of plasma cutting parameters Diploma thesis of the attendance engineer´s study – Mechanical Engineering, specialization Machinery Technology. Academic year 2008/2009. Faculty of Mechanical Engineering of University of Technology in Brno, Institute of the Manufacturing Technology. The Diploma thesis is concerned with the thermal division of a material, concretely by the plasma cutting. It monitors the operational parameters influence of this process to the result quality of cut and the purpose is to optimize these parameters from the qualitative standpoint. The experiment was executed at the plasma cutting equipment Fine Focus 800 of the company KJELLBERG with the utilization of the material S 690 QL. On the base of the literary study of the thermal division of the materials problems it was also described the comparison of the plasma cutting with the method of the division of materials by the oxygen, both from the point of view of the quality, and from the economical point of view.
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Resistance spot welding
Kosinka, Jakub ; Kandus, Bohumil (referee) ; Daněk, Ladislav (advisor)
The project describes the principle of resistance spot welding and sets the parameters which the quality of the weld nugget depends on. Moreover, it compares the macrostructure and mechanical properties of the spot welds made by soft or hard welding mode. In the experimental part, there is evaluating the strength of weld, precisely said cohesiveness weldments depending on the number of spot welds and their mutual position.
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Microstructure and hardness of bainitic weld deposits on rails
Havlík, Petr ; Stránský, Karel (referee) ; Foret, Rudolf (advisor)
Surfacing worn crane railways as renovation technology can make several possible ways, so as manual welding whit coated electrode, with filled electrode or automatic submerged arc. The resulting mechanical properties will depend on the additional materials, which was used to create surfacing. This thesis deals whit evaluation of integrity and microstructure single - layer to three - layer surfacing with filled electrode on the rail with predominantly pearlitic structure. Were evaluated areas with the greatest heat dissipation during cooling, due to the possible occurrence of side structures. The study employed the interaction light microscopy, the scanning electron microscopy equipped by energy dispersive chemical microanalysis, the macro and micro hardness measurement by Vickers.
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Plasma cutting of high strength steels
Šmak, Martin ; Herčík, Tomáš (referee) ; Kubíček, Jaroslav (advisor)
Cutting of steel is one of the fundamental operations within steel processing and steel product manufacturing. The cutting of high-strength steels represents a significant technological problem since the application of many methods produces an extensive amount of heat that is introduced into the material. The heat may significantly impact the mechanical properties of the steel. The thesis is focused on the application of the method of plasma cutting on high-strength steels. In the theoretical part of the present thesis, the common methods of cutting of steel and the plasma cutting technology are described. The parameters influencing the process of plasma cutting and their impact on the quality of the section are discussed. Furthermore, the concept of a heat-affected zone in the context of the plasma cutting method is concerned. The experimental part deals with the influence of plasma cutting on the hardness of certain types of high-strength steels. Three types of high-strength steels were used for the experiments: ARMOX 500 T, STRENX 650 MC E, and XAR®450. The sections were performed with two different cutting speeds. The size of the heat-affected zone and the hardness in the different areas of the section were evaluated. The results show that the plasma cutting is suitable for cutting of high-strength steels if appropriate parameters are selected. The influence of this method on the mechanical properties of certain high-strength steels is shown and discussed.
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Plasma cutting of high strength steels
Šmak, Martin ; Herčík, Tomáš (referee) ; Kubíček, Jaroslav (advisor)
Cutting of steel is one of the fundamental operations within steel processing and steel product manufacturing. The cutting of high-strength steels represents a significant technological problem since the application of many methods produces an extensive amount of heat that is introduced into the material. The heat may significantly impact the mechanical properties of the steel. The thesis is focused on the application of the method of plasma cutting on high-strength steels. In the theoretical part of the present thesis, the common methods of cutting of steel and the plasma cutting technology are described. The parameters influencing the process of plasma cutting and their impact on the quality of the section are discussed. Furthermore, the concept of a heat-affected zone in the context of the plasma cutting method is concerned. The experimental part deals with the influence of plasma cutting on the hardness of certain types of high-strength steels. Three types of high-strength steels were used for the experiments: ARMOX 500 T, STRENX 650 MC E, and XAR®450. The sections were performed with two different cutting speeds. The size of the heat-affected zone and the hardness in the different areas of the section were evaluated. The results show that the plasma cutting is suitable for cutting of high-strength steels if appropriate parameters are selected. The influence of this method on the mechanical properties of certain high-strength steels is shown and discussed.
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Resistance spot welding
Kosinka, Jakub ; Kandus, Bohumil (referee) ; Daněk, Ladislav (advisor)
The project describes the principle of resistance spot welding and sets the parameters which the quality of the weld nugget depends on. Moreover, it compares the macrostructure and mechanical properties of the spot welds made by soft or hard welding mode. In the experimental part, there is evaluating the strength of weld, precisely said cohesiveness weldments depending on the number of spot welds and their mutual position.
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|
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Optimalization of plasma cutting parameters.
Vacula, Jakub ; Mrňa, Libor (referee) ; Daněk, Ladislav (advisor)
VACULA Jakub: Optimization of plasma cutting parameters Diploma thesis of the attendance engineer´s study – Mechanical Engineering, specialization Machinery Technology. Academic year 2008/2009. Faculty of Mechanical Engineering of University of Technology in Brno, Institute of the Manufacturing Technology. The Diploma thesis is concerned with the thermal division of a material, concretely by the plasma cutting. It monitors the operational parameters influence of this process to the result quality of cut and the purpose is to optimize these parameters from the qualitative standpoint. The experiment was executed at the plasma cutting equipment Fine Focus 800 of the company KJELLBERG with the utilization of the material S 690 QL. On the base of the literary study of the thermal division of the materials problems it was also described the comparison of the plasma cutting with the method of the division of materials by the oxygen, both from the point of view of the quality, and from the economical point of view.
|
|
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Electron beam welding technology
Skalka, Jan ; Vaněk, Mojmír (referee) ; Richter, Tomáš (advisor)
The bachelor thesis is devoted to analysis of electron beam welding technology. It is unconventional method of welding characterized by high quality weld and narrow heat-affected zone of welded parts. This technology, due to its development and qualities, has found its application in many industries, primarily in aviation and astronautics. The vacuum is limiting feature of this method and it is necessary for electron beam welding. However, even in this area, the development of new technologies have not stopped and generates concrete solutions to those problems. The thesis is also focused on elektron beam welding of rotary parts in the piece and serial production.
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Microstructure and hardness of bainitic weld deposits on rails
Havlík, Petr ; Stránský, Karel (referee) ; Foret, Rudolf (advisor)
Surfacing worn crane railways as renovation technology can make several possible ways, so as manual welding whit coated electrode, with filled electrode or automatic submerged arc. The resulting mechanical properties will depend on the additional materials, which was used to create surfacing. This thesis deals whit evaluation of integrity and microstructure single - layer to three - layer surfacing with filled electrode on the rail with predominantly pearlitic structure. Were evaluated areas with the greatest heat dissipation during cooling, due to the possible occurrence of side structures. The study employed the interaction light microscopy, the scanning electron microscopy equipped by energy dispersive chemical microanalysis, the macro and micro hardness measurement by Vickers.
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