The aim of this project is to examine the welding of the upper arm of the current collector - the pantograph of the electric locomotive according the the CSN EN 15085 norm. The first part of this thesis dealt with the elaboration of all needed WPS and with the proposal of the current preparation that is going to be realized. The experimental part dealt with the practical execution of the welding as defined in the first part. The macrostructure of weldings and the process of hardening have been evaluated based on the welding samples
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