National Repository of Grey Literature 214 records found  previous11 - 20nextend  jump to record: Search took 0.00 seconds. 
Orbital welding assembly welds in the Nuclear Power by the TIG method
Lukášek, Zdeněk ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
The Bachelor's thesis looks at the possibility of using orbital welding by the TIG method on mounting welds in JE Dukovany. In the opening section, we deal with the issue of weldability, primarily carbon steels. Furthermore, the work focuses on TIG welding technology, both in the manual and mechanised way it details, including the advantages and disadvantages of both variants. In the experimental section, five test samples of ferric-perlithic material pipes were welded. The samples were assembled to simulate possible combinations that occur during pipeline assembly. Non-destructive and destructive controls followed, verifying the quality and mechanical properties of the resulting weld joints. In conclusion, the results of the trials were assessed and evaluated.
Repair TS tubes of the steam generator by manual welding
Zeman, Tomáš ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This bachelor thesis deals with repair of heat exchange tubes of steam generator of Dukovany Nuclear Power Plant. Defects in the material of the collector of the steam generator were to such an extent that it was necessary to proceed with manual repair by workers inside the collector. A number of inspection welds, thorough training and preparation were performed to obtain the qualification of the repair. The repair was followed by a series of tests and trials, which ended in a satisfactory result and the equipment was put into operation.
Dependence of the laser weld geometry on the bevel size
Man, Antonín ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
This work deals with laser welding technology. It explains in more detail advantages and disadvantages, applications and direction in which this relatively young technology develops. The main topic of this work is welding of martensitic stainless steel with carbon structural steel. Components of this type can be found, for example, in the power industry, specifically the stator part of a steam turbine. Part of this work is also an experiment that will explain the dependence of the geometric dimensions of the material to be welded on the quality of the weld. The welded test specimens were subsequently tested by both the non-destructive and destructive methods. It can be stated from the results, that the size of the bevel does not affect the quality of the weld, nor geometry.
Manual versus orbital GTAW piping welding
Hofbauer, Jan ; Kubíček, Jaroslav (referee) ; Sigmund, Marián (advisor)
In thesis are compared options of stainless steel piping welding, orbital and manual version of method GTAW and GMAW. At the beginning, these methods are described theoretically and after that there are described materials used for fabrication two test welds on austenitic steel piping of diameter 168 mm. The first weld was made by orbital method GTAW, the second one by manual method GMAW. Next, these two welds are compared based on defects, welding parameters and width of heat affected area. The conclusion is that both welds are defect-free and because of economical aspects is better to use orbital GMAW method for this diameter of piping.
Electrophoresis coating
Holčapek, Jiří ; Kubíček, Jaroslav (referee) ; Žák, Ladislav (advisor)
This bachelor is based on a study of electrophoresis coating and corosion. The first part contains information about corrosion of metal and the importance of protecting metal parts. Then it deals with the technology of electrophoresis coating and technological process of creating electrophoresis coating. Finally, new trends in the field of electrophoresis coating are presented.
Plastic plating
Čermák, Jan ; Kubíček, Jaroslav (referee) ; Žák, Ladislav (advisor)
The perspective of the production of plastic parts has helped to spread the metallization of these parts on a large scale. Whether a coating is functional or just decorative. This bachelor thesis presents a comprehensive study, analysis, evaluation and comparison of the possibilities of creating metal coatings on plastic materials. The thesis deals with galvanic, chemical, vacuum and special methods of plating. For all the mentioned methods of plating, the technological procedure, equipment for plating, evaluation of individual methods and analysis of the use of plated plastic parts are given.
The influence of welding parameters on the quality and mechanical properties of the weld joint
Vlach, Jan ; Stejskal, Ondřej (referee) ; Kubíček, Jaroslav (advisor)
The Master´s thesis focuses on the possibilities of using MAG welding on carbon steel 1.1221(C60E) without using preheating. It researches the effect of basic welding parameters on the final characteristics with the goal being to find a welding seam without defects, without using preheating.
Renovation of wood flaker rotor blades by flux cored wires
Soldán, Jan ; Kubíček, Jaroslav (referee) ; Sigmund, Marián (advisor)
The bachelor thesis presents a state of renovation of wood flaker rotor blades by flux cored arc welding. The theoretical part of the thesis presents posssible ways of renovations with materials included. Subsequently, in order to find out, which one of two flux cored electrodes are more suitable for this specific renovation, the experiment was made. The flux cored electrodes were compared in heat input, price, micro and macro structure and final hardness of welded material. Due to very high hardness results, the flux cored electrode named Megafil A760M was chosen to be used in the renovation. At the end of the thesis, the specification of welding process was according to EN ISO 15 609-1 standard.
Application of WC grains by brazing
Izák, Josef ; Kubíček, Jaroslav (referee) ; Sigmund, Marián (advisor)
Bachelor thesis is aimed to assessment condition of brazing component barking plate. Solder contains grains of tungsten carbide is applied on steel due to raise hardness of plate. Applied solder with grains, does not only raise the hardness, but also multiply increase lifetime of plate. Technology, which is used to brazing, is oxy – acetylene flame. It will be examined two type of solder. In the first it is provided optical exam and then destruction exams (micro hardness, macrostructure, microstructure, SEM and EDS analysis). In the end It was proposed qualifications of brazer and exams of brazing join.
Welding of pipes made of CrMo steel
Matějek, Martin ; Sigmund, Marián (referee) ; Kubíček, Jaroslav (advisor)
The aim of this diploma thesis is to compare mechanical properties of welded joints on tubes from 32x2 mm. Tubes are made from 25CrMo4 steel, which is used for production of racing kart chassis. The steel has a tensile strength of Rm = 800 MPa and up to 1200 MPa after refinement. For welding of samples are used technologies MAG and TIG.

National Repository of Grey Literature : 214 records found   previous11 - 20nextend  jump to record:
See also: similar author names
1 Kubíček, J.
22 Kubíček, Jan
9 Kubíček, Jaromír
3 Kubíček, Jindřich
1 Kubíček, Jiří
1 Kubíček, Josef
1 Kubíček, Jovan
22 Kubíček, Ján
Interested in being notified about new results for this query?
Subscribe to the RSS feed.