サブマージアーク溶接過程における酸素および窒素量について
1988 年 6 巻 3 号 p. 367-374
詳細
1988 年 6 巻 3 号 p. 367-374
The change of the contents of oxygen and nitrogen in the electrode wire tip, droplet and weld metal of the submerged arc welding was studied by varying the arc voltage and welding speed.
The results obtained are summarized as follows.
(1) The oxygen and nitrogen contents in the electrode wire tip are far higher than the level of the wire by the influence of the partial pressure.
(2) At the electrode wire tip the reactions of the silicon and manganese occur considerably.
(3) The oxygen and nitrogen contents in the droplet metal increase as the welding speed increases.
(4) The estimated oxygen and nitrogen contents of droplet metal with the welding speed 40 cm/min decreases than the level of electrode wire metal.
(5) In the droplet metal deoxidation reaction occur during flight in the arc.
(6) The oxygen and nitrogen contents are remarkably different by the exposure time in the gas phase and flight pass of droplet metal.
(7) The oxygen content of weld metal is lower than the level of droplet metal and the nitrogen content of weld metal is higher than it.
