Open AccessThe working conditions analysis of the electrodes of plasma torch EDP-104A in nitrogen plasma
Author(s) -
G V Galevskiy,
В. В. Руднева,
E. G. Orshanskaya,
S G Galevskiy,
I. I. Mishne
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/866/1/012019
Subject(s) - plasma torch , plasma , torch , cathode , nitrogen , materials science , electrode , tungsten , oxygen , erosion , thermal spraying , analytical chemistry (journal) , composite material , metallurgy , chemistry , environmental chemistry , coating , paleontology , physics , organic chemistry , quantum mechanics , welding , biology
The analysis of the electrode conditions and performance of plasma torches EDP-104A in nitrogen plasma is carried out. It is shown that the life of the plasma torch is determined by the erosion of the tungsten thermal cathode. It is confirmed that the erosion depends on the strength of the current and the oxygen content in the plasma-forming gas. At the current strength of 1 kA with an increase in oxygen content from 0.1 to 0.5%, erosion increases from 10-12 to 10-9 kg/C. To reduce cathode erosion, it is necessary to limit the oxygen content in technical nitrogen.