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Information × Registration Number 0222U002096, 0117U001219 , R & D reports Title Research regularities and physical and technical features of arc welding with consumable electrode in a pulsed mode designs critical applications in all positions, including under water. popup.stage_title Head Maksymov Serhii Yu., Доктор технічних наук Registration Date 09-02-2022 Organization E.O.Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description2  The nature of the physical phenomena of the formation and transfer of molten metal droplets in the arc process was studied in the case of adding a pulsing action and the regularities of its effect on the redistribution of forces acting on the droplet and the weld pool, the course of metallurgical reactions at both the drop and the pool stages, electrohydrodynamic processes in the welding bath, investigated the features of the use of a pulsed arc with a consumable electrode and pulsed laser radiation in hybrid laser-arc welding technologies. A hydrostatic model has been developed to melt an electrode metal droplet. On its basis, the existence of a plurality of stable forms of an electrode metal droplet of a given volume, located at the end of an electrode of a given diameter, is shown. The conditions for ensuring the welding process with the coaxial ordered detachment of a drop of molten electrode metal, a decrease in heat removal from the surface of the drop and the electrode, which made it possible to increase its technological and energy efficiency, have been established. The highest efficiency and the best technological parameters (melting coefficient and mass melting rate) are characterized by intensive welding processes with a high current density in the electrode. In pulsed-arc consumable-electrode welding of low-alloy structural steels in mixtures of shielding gases Ar + 18 ... 20% СО2, the pulse duration range is determined, where metal spatter can be reduced to a level of less than 1.5% (pulse duration 2.6 ... 3.4 ms ). The fine-droplet transfer of the electrode metal according to the "one pulse - one drop" principle is achieved at currents much lower than in a stationary process. The influence of the constituent parameters of the impulse action on the quality and formation of the deposited metal, metallurgical processes in the arc-burning zone and the weld pool, the weld and HAZ metal's structure, and mechanical properties of the stress-strain state of we Product Description popup.authors Zhernosekov Anatolii M. Sidoruk Volodymyr S popup.nrat_date 2022-03-09 Close