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National Repository of Grey Literature 12 records found  previous11 - 12  jump to record: Search took 0.01 seconds. 
Hybrid welding of high-strength steels
 Horník, Petr ; Šebestová, Hana ; Mrňa, Libor
High-strength steels represent a significant group of materials in the field of automobile construction, agricultural and construction machinery, mining conveyors or bridge construction. The excellent strength characteristics is achieved due to the very fine-grained structure ensured by microalloying and the controlled rolling process. In order to preserve the fine-grained structure and hence the required properties and minimize thermal distortions, it is advisable to use welding technologies that do not bring excessive heat to the material. At the same time, however, it is advisable to avoid large temperature gradients that support the formation of fragile microstructures. Therefore, an electric arc preheating is placed before the laser beam and its influence on the weld geometry and the heat-affected area is evaluated.\n
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Design of Conveyor Semi-Trailer
 Nepovím, Ondřej ; Kovář, Stanislav (referee) ; Pokorný, Přemysl (advisor)
The first part of the thesis focuses on a research study of high-strength steels. The thesis also includes a conceptual design of the supporting structure of a transshipment trailer, which uses high-strength materials. This design is compatible with the Herkul trailer produced by the company NovaSteel s. r. o. and distributed by the sales network of Romill Brno, spol. s r.o. In its final part, the thesis deals with a stress analysis of the proposed design of the transshipment trailer. Stress-strength and deformation tests were carried out by means of the finite element method.
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