Special features of breaking the welded connections of the ferritic steels

Abstract

Were investigated the special features of breaking the welded joints of the high-temperature (oxidation-resistant) (up to 1100°C) of the ferrite class of steel grade 08X25T steel (X8CrTi25, EN 10028-2) by the executed manual arc welding (111 LST EN 24063) by the electrodes of pearlitic, ferrite and austenitic classes. It is established that in the joints being investigated destruction more fre-quently is observed in the heat-affected zone and it is thin-ner in the weld itself. Breaking of the welded connections executed by the electrodes of pearlitic class more fre-quently had brittle character, is thinner intermediate. Breaking the welded connections executed by austenitic electrodes more frequently had plastic nature, thinner - intermediate.