Development of Mechanized Arc Welding Technology for High-strength Reinforcing Steel in a Reductive Carbon Monoxide Atmosphere

Abstract

Modern methods of welding high-strength reinforcing steels were analyzed. Comparative studies of welded joints obtained using manual arc welding and welding in a reducing atmosphere of carbon monoxide were carried out. A chemical and metallographic analysis of welded joints was performed. It has been established that welded joints of microalloyed steels made at low temperatures may have reduced strength and viscous properties. The possibility of making welded steel joints using highly-efficient arc welding in a reducing medium of carbon monoxide was investigated. Welding modes have been selected to ensure the formation of a quality welded joint. Studies showed that the use of the proposed welding method in a reducing medium of carbon monoxide ensures full strength of the welded joint and the base metal.