Development of electrodes for welding low-carbon and low-alloy steels

Abstract

The aim of the work is to create an electrode for welding low-carbon and low-alloy steels in
the installation conditions, using low-current and low-voltage alternating current sources.
This is achieved by the addition of copper oxide and aluminum to optimize the deoxidation
system and the gas-slag coating system in its composition containing hematite, ferromanganese,
ferrotitanium, talc, clay, soda, dolomite and wood flour.
For the research, metal electrodes for manual arc welding, manufactured by the crimping
method, were used. Rods of electrodes were made of steel welding wire of mark Sv-08A in
accordance with GOST 2246-70 with a diameter of 3 mm.
Welding of plates made of steel VSt3sp was carried out in the lower position with
alternating current of 60-80 A, in accordance with the requirements of GOST 9466.
Welding-technological properties and mechanical characteristics of the weld metal were tested. The
mechanical properties of the weld metal were determined on the samples in accordance with GOST 6996.
High welding-technological properties of electrodes allow welding of critical structures from
carbonaceous and low-alloy steels on direct and alternating current using power supplies with idling
voltage of 50 V, and also to perform assembly seams in all spatial positions without defect formation.