コントロールド・ローリング材におけるサブマージアーク溶接金属の高靱化に関する研究(第2報)
溶接金属の靱性に及ぼす母材のNb,Vの影響
1978 年 47 巻 2 号 p. 105-109
詳細
1978 年 47 巻 2 号 p. 105-109
Niobium and/or vanadium were added to the 0.09C-0.2Si-1.5Mn system so as to study the toughness of submerged arc weld metal. The plates which show the highest absorbed energy of weld metal contain from 0.02 to 0.04% noibium and less than 0.09% vanadium. When less niobium and vanadium in plate are contained, the refining effect is insufficient so that absorbed energy of weld metal becomes reduced. When niobium and vanadium are contained more than the optimum content, a precipitation hardening effect is produced, thus impairing the, toughness of weld metal. The effect of precipitation hardening is more ermarkable with niobium than with vanadium.
