Strengthening of Spot Welded Lap Joints by New Hardened Zone

DOI 2 References
  • KITAMURA Takanori
    Graduate School of Engineering, Kyushu Institute of Technology
  • AKIYAMA Tetsuya
    Graduate School of Engineering, Kyushu Institute of Technology
  • MASUDA Yu
    Kyushu Institute of Technology (Present Address SUMITOMO PIPE & TUBE Corporation)

Bibliographic Information

Other Title
  • 硬化領域新成による抵抗スポット溶接重ね継手の高強度化

Abstract

This paper deals with the strengthening of spot welded lap joints by new hardened zone. Based on the equation to predict the strength proposed by past researchers, the factors necessary for the strengthening were extracted. And, based on these factors, the strengthening of spot welded lap joints was examined. First of all, in order to increase the hardened zone, the vicinity of the nugget edge was heated with a laser. Next, tensile shear tests were conducted by using spot welded lap joints which were heated by laser at various distances from nugget. Finally, the relationship between tensile shear strength and the distance from nugget center to the crack was clarified. As a result, by increasing the hardened zone, we found that the fracture position was far away from the nugget edge. And, we found that the tensile shear strength could be improved by 15%.

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Details

  • CRID
    1390001204727418624
  • NII Article ID
    130004445730
  • DOI
    10.2207/qjjws.31.89
  • COI
    1:CAS:528:DC%2BC3sXptlOhsLo%3D
  • ISSN
    24348252
    02884771
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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