密封形溶接における気孔発生原因

• 東 博純

  (株)豊田中央研究所

• 杉本 久

  (株)豊田中央研究所

書誌事項

タイトル別名

• Blowhole formation in gas metal arc welding for sealing parts.

抄録

In welding for sealing purpose, blowhole are frequently formed by a small rise of the pressure within a space sealed by welding. The critical pressure for blowhole formation was studied in relation to the clearance in weld joint.<BR>The clearance is simulated by the narrow hole provided in a block specimen. The inner space was filled with a gas and the outside of the hole was melted. The results are summarized as follows:<BR>(1) The critical pressure for blowhole formation is determined by the apparent surface tension of the molten metal and the clearance in a weld joint.<BR>(2) The relation between the critical pressure (Pcr) for blowhole formation and the diameter (D) of the gas hole was given by the equations, <BR>Pcr-54.4=534/D (for air)<BR>Pcr+192 =592/D (for argon)<BR>(3) In welding for sealing purpose, it is effective for prevention of blowhole formation to decrease the pressure in a sealing space and to minimize the clearance in a weld joint.

収録刊行物

• 溶接学会論文集

  溶接学会論文集 4 (2), 389-392, 1986

  一般社団法人 溶接学会

キーワード

• Blowhole
• Pressure
• Surface tension
• Mechanism
• CO<SUB>2</SUB> arc welding
• Sealing

詳細情報

• CRID: 1390282679698717952
• NII論文ID: 130003764779
• DOI: 10.2207/qjjws.4.389
• ISSN: 24348252
• ISSN: 02884771
• 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