多層かど継手部の溶接割れに関する研究 : サブマージアーク溶接と被覆アーク溶接の比較

概要

論文の詳細を見る
Lamellar tearing of opening type and root cracking occasionally occur in multipass welded corner joints. In this paper, the influence of welding methods such as submerged arc welding (SAW) and covered arc welding (SMAW) is investigated on the occurrence of these weld cracks. The main results obtained in this study are as follows. (1) When SAW is applied, the transverse welding residual stress (σ_x) is less on the edge surface of the vertical plate and the lamellar tearing is less probable to occur in comparison with SMAW. (2) By SAW, σ_x induced at the root is less and root cracking is less probable to occur against SMAW. Accordingly, in order to prevent occurrence of the weld cracks in multipass welded corner joints, it is effective to use SAW whose deposited metal weight per unit welding pass is large and which enables to fill up a given groove with smaller number of passes.
社団法人溶接学会の論文
1981-04-05