Abstract
The influence of nitrogen partial pressure were investigated with submerged arc welding. Especially the effect on the oxygen and nitrogen content in weld metal and the absorbed energy by Charpy impact test of those metals by various nitrogen partial pressure were measured.
The results obtained are summarized as follows.
(1) The oxygen content in the weld metal does not change remarkably irrespective of nitrogen partial pressure increased.
(2) The nitrogen content in the weld metal increased as the nitrogen partial pressure increased.
(3) The silicon content in the weld metal increased slightly as the nitrogen partial pressure increased.
(4) The manganese content in the weld metal was almost constant and decreased slightly by the fluxes compositions as the nitrogen partial pressure increased.
(5) The absorbed energy of weld metal increased and decreased due to the flux compositions as the nitrogen partial pressure increased.
