|
|
Study weld porosity aluminum alloy 5000 series during hybrid welding Laser-TIG
Drápela, Petr ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
This bachelor thesis is aimed on studying weld porosity of aluminium alloys made by laser-TIG technology. Theoretical part deals with welding methods and their parameters, capabilities and usage. Methods are investigated separately then as a unit. At the end of the theoretical part there is summary about welding aluminium alloys and their properties. In experimental part it is made eleven testing welds on sheet metal from aluminium alloy EN AW-5754 H111, thickness 5 mm. After this sizes of welds are measured. From these sizes dependences welding current to input heat Q are made. Final part concerns analysis of welding defects and final evaluation optimum welding parameters.
|
|
|
Weldability of cobalt alloys by hybrid method Laser-TIG
Herčík, Tomáš ; Mrňa, Libor (referee) ; Sigmund, Marian (advisor)
The master thesis summarizes the critical situation of the lack of a cobalt used in different industry branches. Due to its increasing price, it will not be possible to use in existing applications. One of these applications is production of cobalt alloys where the replacement of this element is impossible. This type of material keeps mechanical properties at high temperature. However, a suitable choice of technology can achieve at least its savings. In the field of welding, the alloys are joined without any use of an additional material. The possible solution could be the use of hybrid technologies or electron beam. Verification of weldability of both methods was realised in experimental parts and evaluated by destructive methods. The investigation was performed on wear resistant alloy Stellite 6B.
|
|
|
Use of laser-TIG hybrid technology for welding aluminium alloys
Drápela, Petr ; Šebestová, Hana (referee) ; Mrňa, Libor (advisor)
Different problems arise from choice of setting technological parameters during welding of alluminium alloys. Choice of welding method, welding speed and material influence mechanical properties of welds. During welding of alluminium alloys come difficulties due to oxidation of thin surface layer of material. One of ways how to overcome this obtacle is to use hybrid laser-TIG welding method. In this diploma thesis is described influence of welding processes on mechanical properties of two alluminium alloys(EN AW-5754 H22, EN AW-6082 T6) and change in their microstructure during welding.
|
|
|
Weldability of cobalt alloys by hybrid method Laser-TIG
Herčík, Tomáš ; Mrňa, Libor (referee) ; Sigmund, Marian (advisor)
The master thesis summarizes the critical situation of the lack of a cobalt used in different industry branches. Due to its increasing price, it will not be possible to use in existing applications. One of these applications is production of cobalt alloys where the replacement of this element is impossible. This type of material keeps mechanical properties at high temperature. However, a suitable choice of technology can achieve at least its savings. In the field of welding, the alloys are joined without any use of an additional material. The possible solution could be the use of hybrid technologies or electron beam. Verification of weldability of both methods was realised in experimental parts and evaluated by destructive methods. The investigation was performed on wear resistant alloy Stellite 6B.
|
|
|
Use of laser-TIG hybrid technology for welding aluminium alloys
Drápela, Petr ; Šebestová, Hana (referee) ; Mrňa, Libor (advisor)
Different problems arise from choice of setting technological parameters during welding of alluminium alloys. Choice of welding method, welding speed and material influence mechanical properties of welds. During welding of alluminium alloys come difficulties due to oxidation of thin surface layer of material. One of ways how to overcome this obtacle is to use hybrid laser-TIG welding method. In this diploma thesis is described influence of welding processes on mechanical properties of two alluminium alloys(EN AW-5754 H22, EN AW-6082 T6) and change in their microstructure during welding.
|
|
|
Study weld porosity aluminum alloy 5000 series during hybrid welding Laser-TIG
Drápela, Petr ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
This bachelor thesis is aimed on studying weld porosity of aluminium alloys made by laser-TIG technology. Theoretical part deals with welding methods and their parameters, capabilities and usage. Methods are investigated separately then as a unit. At the end of the theoretical part there is summary about welding aluminium alloys and their properties. In experimental part it is made eleven testing welds on sheet metal from aluminium alloy EN AW-5754 H111, thickness 5 mm. After this sizes of welds are measured. From these sizes dependences welding current to input heat Q are made. Final part concerns analysis of welding defects and final evaluation optimum welding parameters.
|
guest ::
