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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Hybrid laser-MIG/MAG welding at ISI
 Mrňa, Libor ; Novotný, Jan ; Šebestová, Hana ; Znášik, Samuel ; Gross, Jan ; Harašta, Jiří
Laser welds usually suffer from underfill defects because the welding is usually made without a filler wire. During the hybrid laser-MIG/MAG welding, the laser beam forms the melt pool, and the arc simultaneously delivers melted filler wire. The synergic interaction of both heat sources allows deeper penetration while the weld face is sufficiently filled and has the prescribed geometry. This contribution reports the issues of individual systems integration and presents already-made experiments.
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Issues of the LaserHybrid welding method
 Znášik, Samuel ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
The thesis deals with the issue of using LaserHybrid welding for the energy industry where the combination of laser and arc could facilitate higher quality welds resistant to aggressive environments, corrosion and oxidation. The methods that the hybrid process produce as well as possible replacements for the MIG and MAG methods are explored, as well as the different configurations and their possible impact on the process. The possible use of the technology for hyperbaric welding is also presented. The experimental part is devoted to the welding of refractory martensitic steel used in the power industry for the production of steam turbines. Weld structures at different parameters were investigated and hardnesses were compared.
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1 Znášik, Samuel
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