Ocena zavarljivosti i izbor najpovoljnije tehnologije zavarivanja čelika povišene jačine klase S690QL

Abstract

Тhis work is considering high strength steel weldability, with special emphasis on advanced low alloyеd Q + T steels. In theoretical part of this work the methodology of evaluation of high strength steel weldability is determined, weldability of considered steel is estimated and welding parameters for the two proposed welding technologies are selected. Аt the end, the optimal welding technology and optimal welding regime of REL/MAG and MIG/MAG proceeding for welding of this steel are recommended. The optimal technology is chosen based on experimental tests. Verification of the chosen technology is performed by the destructive and non-destructive tests of some of the welded joints. Those tests belong to a group of especially rigorous control tests of welded constructions.