Emission Spectrum and Resistivity of Low Power Plasma Weld Arcs
作者:
Pang Qingdong,
JohnC. McClure,
期刊:
Spectroscopy Letters
(Taylor Available online 1991)
卷期:
Volume 24,
issue 4
页码: 487-497
ISSN:0038-7010
年代: 1991
DOI:10.1080/00387019108018132
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Emission spectra from plasma arc welds were observed under a variety of current, voltage, polarity, and standoffs. If reverse polarity (welding torch positive) welds are struck below 50 amperes most of the power is deposited at the electrode rather than the workpiece because of low carrier density within the arc. Straight polarity, on the other hand, suffers no such limitation because of electrons created in the pilot arc used to start the weld process.
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