Study on Mechanical Properties of Locally Drying Underwater Welding Joint and Improvement by Underwater Heat Treatment

DOI

Bibliographic Information

Other Title
  • 局部乾式水中溶接部の継手性能とその水中熱処理法による改善に関する研究

Abstract

The authors have carried out the evaluation and improvement of the mechanical properties of the "Locally Drying Underwater Welding" joint. The results arc summarized as follows:<BR>1. The effect of welding conditions on the cooling characteristic of the welded joints is basically equal to that of the head welds. The joint by low current-low speed welding condition has a hardness distribution close to that of the air weld, and has good mechanical properties with respect to elongation, reduction of area, charpy absorbed energy, etc.<BR>2. The range of temperature which the slow crack preceded the brittle fracture occurred in the underwater welds in the three-points bend COD test is -85°C to -75°C. Therefore, with underwater environment taken into account, there is little possibility of brittle fracture in these welds. 3. To improve the mechanical property of underwater weld joint, the possibility of induction heating in water has been studied, and it has been shown that the weld can be heated up to 650°C by this heat treatment, and the mechanical properties of the weld have improved nearly up to that of the air weld.

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Details 詳細情報について

  • CRID
    1390001206498014720
  • NII Article ID
    130003763641
  • DOI
    10.2207/qjjws1943.51.189
  • ISSN
    18837204
    00214787
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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