片面サブマージアーク溶接で発生する終端割れの発生機構と防止方法の検討(第 1 報) : 溶接諸条件の影響と発生機構の究明

概要

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When the arc run-off onto the flat tab plate at the terminal end of joint, longitudinal large crack occurs with high frequency at the point just before the end in one side submerged arc welding. From the result of the observation of the fracture surface, the crack occures at high temperature as just after weld metal solidifies. And crack occurrence isn't influenced upon the kind of welding material and chemical composition of weld metal. Keeping down the welding speed and heating the end of weld joint are effective on crack prevention, and with Sealing Bead process in which the reverse bead is not created at terminal end of weld joint or Crator Conjunction process in which crators are joined at middle of wled joint, end crack don't occur.
社団法人溶接学会の論文
1982-04-05