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Abstract
The paper presents studies of the influence of energy-technological modes of welding on the physical and mechanical properties of welded joints obtained by submerged-arc welding, with the use of slag from silicomanganese production for parts of mining equipment. To study the welding and technological properties, we used a welding flux of 0.45-2.5 mm fraction based on a silicomanganese slag with a chemical composition, wt. %: 0.42 FeO, 16.22 MnO, 29.00 CaO, 41.34 SiO2, 6.53 Al2O3, 1.33 MgO, 0.24 S, 0.022 P, 0.008 ZnO, 0.031 C, 0.31 F, 0.15 TiO2, 0.025 Cr2O3. Automatic welding of 09G2S low-alloy steel under this flux was carried out by Sv-08GA wire. Various welding modes were investigated to ensure the required penetration depth and the absence of external defects (pores, cracks, cavities). Based on the data obtained, the dependences of the influence of the parameters of the welding mode on the mechanical properties of welded samples are plotted. It is shown that changes in the parameters of the current strength, welding speed and voltage can affect the physical and mechanical properties of the weld, as well as the transition of sulfur and hydrogen into the weld.).
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1 Siberian State Industrial University, 42 Kirova str., Novokuznetsk, 654007, Russia