応力除去焼なましによる材質変化 : HT80 鋼の応力除去焼なましに関する研究(第 1 報)

概要

論文の詳細を見る
Mechanical properties of 80kg/(mm)^2 class high strength steel plate and forged steel were investigated concerning the quality change in base metal and heat-affected zone caused by stress-relief heat treatment. Base metal of both the steel plate and the forged steel showed little change in the yield strength, the tensile strength and the Charpy V-notch impact energy, up to the Hollomon-Jaffe Parameter, [P] value of 18.3×(10)^3 (620℃×3hrs.) But, there was a marked deterioration in the notch toughness of the fusion line after the stress-relieving and the 50% FATT (vTrs) was increased in temperature by approximately 30℃ in the manually welded joint and approximately 50℃ in the submerged-arc welded one. It became clear that the metallurgical change near the fusion line induced the deterioration in the notch tongness.
社団法人溶接学会の論文
1977-11-05