Kolisnichenko O. Formation of modified layers under plasma- detonation treatment of carbon steel

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0403U001769

Applicant for

Specialization

  • 05.03.06 - 3варювання та споріднені процеси і технології

21-05-2003

Specialized Academic Board

Д 26.182.01

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

Essay

Thesis is devoted to the research of the pulsed plasma stream interaction with a workpiece surface during plasma-detonation treatment (PDT). Current amplitude-time characteristics have been investigated in the interelectrode gap as well as between plasma generator and a workpiece surface. Theoretical analysis of the thermal flow components from plasma shock-compressed layer to the surface as well as a workpiece polarity influence on the heating process have been carried out. Thermal fields dynamics during PDT in the surface layers has been modeled by solving the nonstationary thermal conductivity equation with the finite-difference method technique. Influences of the absorbing coatings and the electric potential applied to a workpiece on the PDT process have been investigated. The results of structure-phase investigations of the modified layers have been described. Industrial test of the research results has been carried out.

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