Multifunction electrode for all position and vertical down welding

A new kind of covered electrode for all position and vertical down welding was developed.The composition of the electrode coating has been optimized using the uniform design method.Melting properties of the electrode coating were studied using test instrument of the GX-III high-temperature physics properties. Experiments results show that the developed electrode has excellent operating characteristics such as arc stability, slag detachment, bead shape, welding spatter and so on.The mechanical tests show that the weld metal obtained in SMAW with this electrode exhibits high tensile strength, yield strength and toughness at low temperature. Through fracture micrograph, weld microstructure, weld composition and hardness distribution of welded joints the weld has high mechanical properties.The electrode can be widely used for the welding of important structures.This new method of developed the electrodes can shorten the development cycle, reduce costs and improve quality of the electrode.