TY - JOUR
TI - The influence of electric ARC activation on the speed of heating and the structure of metal in welds
AU - Savytsky Oleksandr M
AU - Savytsky Mychailo M
AU - Bajić Darko R
AU - Shkrabalyuk Yuriy M
AU - Vuherer Tomaž
JN - Thermal Science
PY - 2016
VL - 20
IS - 1
SP - 239
EP - 246
PT - Article
AB - This paper presents the results of a research related to the impact of  electric arc activation onto drive welding energy and metal weld heating  speed. It is confirmed that ATIG and AMIG methods, depending on metal  thickness, single pass weldability and chemical composition of activating  flux, enable the reduction of welding energy by 2-6 times when compared to  conventional welding methods. Additionally, these procedures create  conditions to increase metal weld heating speed up to 1,500-5,500°C/s-1.  Steel which can be rapidly heated, allows for a hardened structure to form  (with carbon content up to 0.4%), together with a released martensitic  structure or a mixture of bainitic-martensitic structures. Results of the  research of effectiveness of ATIG and AMIG welding showed that increase in  the penetration capability of electric arc, which increases welding  productivity, is the visible side of ATIG and AMIG welding capabilities.