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Material properties of the F82H melted in an electric arc furnace

電気炉溶解した低放射化フェライト鋼F82Hの機械的性質

酒瀬川 英雄   ; 谷川 博康; 他2名*

Sakasegawa, Hideo; Tanigawa, Hiroyasu; 2 of others*

核融合原型炉のためには約11,000トンの低放射化フェライト鋼が必要となる。このためには問題のない機械的性質をもった低放射化フェライト鋼を大量製造するための技術開発が必要である。ここでは20トン電気炉にて溶解されたF82H-BA12ヒート鋼の機械的性質に注目した。このヒートの溶解、鍛造、熱間圧延の後、熱処理最適化のための4種類の熱処理を施して引張やシャルピー衝撃試験を実施した。そして電気炉溶解による影響を明らかとするため、これまでに真空誘導炉で溶解された5トン以下のF82Hヒート鋼の結果と比較した。

DEMO reactor requires over 11,000 tons of reduced activation ferritic/martensitic steel (RAFM). Therefore, it is necessary to develop the manufacturing technology for fabricating such large-scale RAFM with appropriate mechanical properties. In this work, we focused mechanical properties of the F82H-BA12 heat which was melted in a 20 tons electric arc furnace. After the melting followed by forging and hot-rolling, this F82H-BA12 heat was heat-treated in four different conditions to optimize heat treatment conditions, and tensile and Charpy impact tests were then performed. The result of these mechanical tests was compared with that of former F82H heats less than 5 tons, which were melted applying vacuum induction melting, in order to study the effect of using electric furnace.

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パーセンタイル:88.69

分野:Nuclear Science & Technology

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