ＣＯ?S２?T‐Ｏ?S２?Tアーク溶接におけるＳｉおよびＭｎの酸化挙動について

• 稲垣 道夫

  金属材料技術研究所

• 和田 次康

  金属材料技術研究所

• 保田 正文

  大同製鋼(株)中央研究所

• 関口 晁

  大同製鋼(株)中央研究所

書誌事項

タイトル別名

• On the Oxidation Behaviour of Si and Mn During CO<SUB>2</SUB>-O<SUB>2</SUB> Are Welding

抄録

The CO₂-O₂ arc welding process is done in strong oxidation atmosphere with a wire containing Si and Mn which are deoxidizing elements. Dr. H. Sekiguchi pointed out that mechanical properties of welded metal were significantly influenced by the content of these elements and there was a proper range of their contents. Therefore, an investigation was made on the oxidation behaviour of Si and Mn. Six kinds of wire containing different amounts of Si and Mn were used. Their compositions correspond to the ranges in which SiO₂ of solid state (Field I) and liquid solution of FeO-MnO-SiO₂ unsaturated with SiO₂ (Field II), respectively, form as a deoxidation product from molten steel just above the solidification point. The multi-pass welding was made with all of the wires under various conditions of arc voltage and oxygen content of shielding gas. Samples taken from upper layer of deposited metal were analyzed. Furthermore, slag covering the weld bead of upper layer was also analyzed.<BR>Thus, the following results were obtained.<BR>(1) It was recognized that the oxidation consumption curve of Si and Mn shows the same tendency regardless of wire composition in Field I or II.<BR>(2) Si and Mn are oxidized with a fixed ratio when welding is performed with different oxygen content of shielding gas or arc voltage. The ratio is dependent on the wire composition. That is, the relation between Si and Mn content of wire and those of deposited metal can be shown as follows.<BR>log (w/o Si) =A log (w/o Mn) +B<BR>constant A is about 1.7 and constant B is determined from the wire composition.<BR>(3) Accordingly, the composition of wire to be used is to correspond with constant B determined from the aimed composition of deposited metal.<BR>(4) Thermodynamic considerations show that, although equilibrium between Si or Mn in weld metals and SiO₂ or MnO in slags is not completely achieved, their deviation from equilibrium is relatively small, and the deviation in oxidation of Si and that in oxidation of Mn are of similar level.

収録刊行物

• 溶接学会誌

  溶接学会誌 45 (11), 960-966, 1976

  一般社団法人 溶接学会

キーワード

• Metals and Alloys
• Surfaces, Coatings and Films
• Mechanical Engineering
• Mechanics of Materials

詳細情報

• CRID: 1390001206501241472
• NII論文ID: 130003763343
• DOI: 10.2207/qjjws1943.45.960
• ISSN: 18837204
• ISSN: 00214787
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可