原子力システム高効率化に向けた高耐食性スーパーODS鋼の開発,6; 製管試験とまとめ

Super ODS steel R&D towards highly efficient nuclear systems, 6; Piping and summary

皆藤 威二 ; 井上 賢紀 ; 鵜飼 重治*; 木村 晃彦*; 奥田 隆成*; 阿部 冨士雄*; 大貫 惣明*; 藤澤 敏治*

Kaito, Takeji; Inoue, Masaki; Ukai, Shigeharu*; Kimura, Akihiko*; Okuda, Takanari*; Abe, Fujio*; Onuki, Somei*; Fujisawa, Toshiharu*

4回の冷間圧延と回復軟化熱処理を繰り返し、再結晶組織を有する外径8.5mm肉厚0.5mmのスーパーODS鋼被覆管の製管に成功した。また、一連のシリーズ発表を総括し、高耐食性・高強度ODS鋼の開発見通しを得た。

The Four path tube manufacturing of the corrosion resistant super ODS ferritic steel was carried out using pilger mill cold working and intermediate softening heat treatment. High-temperature final heat treatment successfully produced isotropical recrystallized microstructure. It was confirmed that target precise dimension of 8.5mm in outer diameter 0.5mm in wall thickness can be achieved by the tube manufucturing process developed by JAEA. Based on the reviewing of R&D results on super ODS steel, the prospect of super ODS steel development was discussed.