Creepové chování a mikrostruktura heterogenních svarových spojů P92/HR3C

Abstract

This thesis deals with the evaluation of the creep behaviour and microstructure of heterogenous welded joints of modern heat resistant steels used in the power industry. For the experiment were used „cross-weld“ specimens of heterogenous weld joints from steels P92/HR3C. The evaluation of specimens after creep testing to fracture was carried out first. After that the specimens were submitted to microstructure analysis by light microscopy, within the study of fracture behavoir. Based on the achieved results, the weakest link of the studied welded joints was P92 steel, where the preferential failure occurred in the intercritical zone of the heat affected zone of weld joint.