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Formation der Schweißnaht, Überwachung und Steuerung des Elektronenstrahlschweißens durch Sekundäremissionssignale
Author(s) -
Trushnikov D. N.,
Belenki'y V. Ya.,
Mladenov G. M.,
Portnov N. S.
Publication year - 2012
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201200933
Subject(s) - electron beam welding , welding , cathode ray , beam (structure) , signal (programming language) , keyhole , secondary electrons , chemistry , electron , titanium alloy , materials science , optics , alloy , physics , metallurgy , nuclear physics , computer science , programming language
The process of emission of term electrons from the zone of effect of the electron beam are analyzed. During the experiments, the samples of stainless steel and titanium alloy were welded. Experiments were conducted to examine the spectrum of oscillations of the secondary current at various values of the specific power of the electron beam. The conducted research showed that the signal spectrum of the secondary current in electron beam welding contains a characteristic high‐frequency (15…25 kHz) component. It was established that the described frequency spectrum is not created by some control system in the electron beam machine and reflects the oscillations in the system – «keyhole‐plasma». Empirical density distribution of the high‐frequency signal was constructed in the amplitude range. It was shown that the parameters of the density distribution is closely linked with the nature of interaction between the beam with the metal and can be used for remote control of technology process.