18-8ステンレス鋼の高温ねじりクリープ強度に関する研究(第1報)(常温ねじり加工の影響について)

概要

論文の詳細を見る
In this study, the torsion creep limits for the 1050℃ solution heat-treated 18-8 type stainless steel bar well known as a high-temperature spring material containing 0・12%C, 16・79%Cr, 6・44%Ni, were measured at 400~720℃. In order to obtain the effect of cold work on the creep strength, the specimens were twisted in an amount of 0・064~0・256π/cm(5Φbar) at room temperature, and then subjected to creep testing. At temperatures of 400℃, 450℃ and 500℃, the torsion creep strength was greatly increased by torsional cold work, and especially, 0・192π/cm work was found to be most effective when testing was 450℃ and 0・128π/cm when it was 500℃. At 600℃, however, only the cold work around 0・064π/cm gave a slight improvement, and at 720℃, cold work induced the deterioration of creep resistance. No change of hardness for the cold twisted specimens were observed at the temperature below 500℃, but above 600℃ the hardness was reduced remarkably.
社団法人日本材料学会の論文
1960-08-15