サブゼロ引張加工および加工後熱処理による304型18-8不銹鋼の疲労強度改善について

概要

論文の詳細を見る
In order to determine high fatigue strength of 18-8 stainless steel at room temperature (to be hereunder abridged as R. T.), the authors performed the two following series of experiments. Experiment A: (1) Measurement of the amount of ferrite and micro-Vickers hardness at R.T. of the specimens to which various extents of stretching were given at -77℃. (2) Measurements of the same at R, T, of the specimens heat-treated at several elevated temperatures after sub-zero working. Experiments B: Rotary bending fatigue test at R. T. of the four followiug kinds of test specimens: (1) sub-zero worked specimens, 20% stretched at -77℃. (2) cold worked specimens, 20% stretched at R. T. (3) specimens 20% sub-zero stretched at -77℃, and later heat-treated at 550℃ for 100 minutes. (4) specimens heat-treated in solution at 1050℃ for 60 minutes (S.H.T.), followed by water quenching. The results of experiments can be summarized as follows; Experiment A: an extraordinary amount of ferrite was recognized in the specimens heat-treated at 100℃ for 30 minutes. this phenomenon disappeared at 300℃. Experiment B: The combination of sub-zero working and subsequent heat-treatment at elevated temperature was found to increase fatigue strength effectively at R. T. The specimens (3) showed the highest fatigue strength 53.2 kg/mm^2, i.e. 90% greater than that of the specimen (4). These phenomena may be explained as due to the decomposition of metastable austenite and to the solubility of micro carbides.
社団法人日本材料学会の論文
1968-07-15

サブゼロ引張加工および加工後熱処理による304型18-8不銹鋼の疲労強度改善について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク