Abstract
The influence of shield gas compositions in argon-nitrogen, argon-oxygen, argon-carbon dioxide and argon-hydrogen systems on the arc temperature was studied by means of the spectral line intensity method.The findings in this work are as follows:1) The arc temperature increases slightly with an increase of welding current.2) The arc temperature does not undergo a noticeable change with arc voltage.3) The arc temperature increases with an increase in nitrogen, oxygen, carbon dioxide and hydrogen additions.The arc temperature in argon-hydrogen gas mixtures is highest, and the one in argon-carbon dioxide gas mixtures is lowest.4) The arc temperature seems to be influenced by electrode materials.
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