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Assessment of suitability welding modes MIG PULSE and MIG DOUBLE PULSE for repairing of forging die
 Sotolář, Vojtěch ; Kubíček, Jaroslav (referee) ; Izák, Josef (advisor)
The bachelor thesis is focused on the renovation of forging dies by pulse methods, specifically MIG pulse and MIG double pulse. The subject of this research was a part of forging die made of steel Wr.Nr 1.2343ESU (H11), however the problem was simplified to the welding of four prisms with the same type of material. The main goal was to evaluate whether these methods can be utilized to speed up the entire renovation process as the welding speed is its undeniable advantage. There were used two types of welding materials to assess the suitability of the renovation. For the tough weld was used the martensitic material CRONITEX RC 58 and for the interlayer was used austenitic-feritic material WELCO A1660. The assessment was conducted based on the non-destructive visual test and also based on destructive tests of macrostructure, microstructure and hardness measurement. The experiment results showed that configuration of tough material with interlayer is inappropriate. The most suitable process seems to be the welding of only tough layer without any interlayer.
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4 Sotolář, Václav
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