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Registration Number

0222U003606, 0118U100495 , R & D reports

Title

Investigation of the processes of energy, mass and electric transfer in the system "plasma arc - powder material - product" in plasma-powder welding and surfacing.

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Head

Krivtsun Ihor V., Доктор технічних наук

Registration Date

07-05-2022

Organization

E.O.Paton Elektric Welding Institute National Academy of scinces of Ukraine

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 The object of research is the methods of high-quality formation of a weld or a welded roller during plasma-powder welding and surfacing. The subject of research is the processes of energy, mass and electricity transfer in the system "plasma arc - powder material - product" in plasma-powder welding and surfacing. Research methods - 1) theoretical research, development of mathematical models and computer modeling of physical processes in plasma arcs, powder particles and in welded and welded metal; 2) experimental studies of the influence of certain factors and parameters of the regime on the penetration of metal and the formation of seams / rollers in plasma and plasma-powder welding and surfacing. Main results – 1) a computer model of a plasma arc formed by a plasmatron for welding and surfacing was developed, and a numerical analysis of its thermal, gas-dynamic and electromagnetic characteristics depending on the geometrical parameters of the plasmatron, arc current and plasma-forming, transporting and shielding gases was performed; - 2) a model of thermal, dynamic and electromagnetic action of arc plasma on a powder particle has been developed, which allows to determine the temperature, trajectory and velocity of particles of the deposited material; - 3) the influence of powder particles distributed in the volume of plasma on the conditions of combustion of the plasma arc is theoretically and experimentally clarified and the thermal state of the product is determined depending on the mode parameters; - 4) Practical recommendations on the modes of plasma-powder welding and surfacing are provided, which ensure high-quality formation of the weld or weld bead.

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Demchenko Volodymyr Fedorovych
Kovalenko Igor V
Kovalenko Dmytro V
Krikent Ihor Valentinovich
Pavlov Oleksii H