The purpose of this paper is to analyze mechanical properties of steel long weld structures. The main role of welding conditions in connected with materials, alloy elements in steel and filer materials, welding technology, state of stress and temperature. First time are presented properties of steel long weld structures after welding with micro-jet cooling. Because of that very important is good selection of steel, welding and micro-jet cooling parameters for proper steel structure. In this study metallographic structure and impact toughness welded joints has been analyzed in terms of welding parameters after laser and MAG welding.
This paper attempts to study safety and exploitation conditions of long weld steel structures. To study the effects of the long structure flexibility and resistance, the structure been welded by steel covered electrodes with varied amount of Mo. The most significant of factors influencing that conditions are connected with material choice, welding technology, state of stress and temperature. Because of that a good selection of steel and welding method is crucial to obtain proper steel structure. Shielded metal arc welding (SMAVV) also known as manual metal arc welding (MMA) is a very popular method of welding used for structure reparation. Very often SMAW could be also treated as main montage process.
