Fundamental Studies on Slag Adherence to Submerged Arc Weldmen

概要

論文の詳細を見る
It is important matter to make clear the mechanism of slag adherence to weldment in submerged arc welding. To examine the effect of condition of steel plate surface on the feature of the adherence, bead-on-plate welding was carried out using a weak acidic fused type flux and plates with polished, as-rolled and gas-cut surfaces. It became clear that the slag adherence in bead-on-plate welding is liable to occur only near the bead edge. Slag adherence was relatively significant in the as-rolled plate welding and was very scarce and almost absent in the polished and gas-cut plate weldings respectively. The cross sectional micro structures of the slag-metal interfaces near the bead edge were examined, because it was considered that the slag chips at the place can anchor the crusty slag over the bead by adhering themselves basically to the HAZ. In the case of the polished plate, neither mechanical bonding nor intermediate layer was found in the slag-metal interface even by an electron microscope with a magnification of 5000×. In the case of the as-rolled plate, no mill scale was observed at the limited portion very near the bead edge under the slag, though a scale-bearing plate was used. And an uneven interface considerably rougher than the original scale-slag interface was formed. This seems to suggest the probable effect of mechanical bonding between slag and metal. Besides, it was considered that in the case of the gas-cut plate, a greater detachability of the surface layers of the plate results m an equally greater detachability of the slag.
社団法人溶接学会の論文
1986-10-01

Fundamental Studies on Slag Adherence to Submerged Arc Weldmen

スポンサーリンク

概要

著者

関連論文

スポンサーリンク