Open AccessEvaluation of influence of technological parameters on width of strengthened layer in plasma surface hardening of structural steels
Author(s) -
A. E. Balanovsky,
V. E. Gozbenko,
S. K. Kargapoltsev,
A. I. Karlina,
Yu I. Karlina
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/759/1/012002
Subject(s) - hardening (computing) , materials science , plasma , anode , cathode , plasma arc welding , case hardening , metallurgy , composite material , electrode , layer (electronics) , hardness , chemistry , physics , quantum mechanics , welding
The article presents the results of the studies of the influence of technological parameters of plasma hardening on the geometric dimensions of the hardening track using modern research methods. The visualization of the heating spot on the metal surface according to the methodology made it possible to further evaluate the role of anode and cathode spots on the formation of a common heating spot in the process of plasma hardening of metals. It was established that, depending on the effective thermal power of the plasma arc, there are several modes of combustion of the plasma arc. For example, at an arc current of 20 A, there are several characteristic anode spots on the surface in the form of regular circles, which, with an increase in the arc current, contract to the center of the common heating spot. It has been established that the speed and distance of hardening affects the width of the hardened zone during plasma surface hardening of metals. The region of existence of several regimes of plasma hardening in a common heating spot was revealed, for which both single and group anode spots are characteristic.