高Al含有溶接金属のじん性改善におよぼすフラックス中TiO_2及びワイヤ中Tiの影響 : サブマージアーク溶接金属の組織とじん性におよぼす鋼板中Alの影響(第2報)(昭和60年度春季全国大会論文発表講演論文)

概要

論文の詳細を見る
In an earlier report an initial investigation into the influence of parent plate steel deoxidation practice, and in particular Al level, on the microstructure and toughness of submerged-arc welds had shown that even small changes in weld metal Si and Al levels (e.g. 0.02 to 0.03% Al) could produce drastic deterioration in Charpy thoughness when using some basic fluxes. In the present report the results are presented of further work, primarily aimed at improving the tolerance to high weld metal Al levels, by using TiO_2 additions to fluxes or Ti additions to wires. Significant improvements in toughness of high Al (0.03-0.04%) weld metals were observed by increasing flux TiO_2 contents and weld metal oxygen levels. Titanium introduced from the wire was much less effective than that introduced from TiO_2 in the flux. A schematic diagram describing the different effects or Al, Ti, Si, oxygen and flux TiO_2 content on acicular ferrite formation is proposed.
社団法人溶接学会の論文
1985-02-05