Increased productivity welding of steel WELDOX 700

Abstract

This paper presents the results of an experiment in which two different technologies of welding high-strength steel S690QL, prone to cold cracking, were used. Welding of the first panel includes a combination of the manual arc welding (111) and gas metal arc welding (135) processes. The 111 procedure welds the root passes, while the 135 process fills in the passes. The second technology includes the flux-cored arc welding (136) welding process for both the roots and the 135 process fills in the passes. The experiment is realized by the examination of welds by nondestructive and destructive methods in order to find a proper welding procedure in terms of achieving greater labor productivity without compromising its reliability