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Updated: Jul 14, 2026

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Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
Published on: March 7, 2018
ナノサイズの炭酸ガスの分散を用いた高温での鋼のクリープ強化
Masaki Taneike1, Fujio Abe, Kota Sawada
1Steel Research Center, and Materials Information Technology Station, National Institute for Materials Science,1-2-1 Sengen, Tsukuba 305-0047, Japan.
Nature
|July 18, 2003
まとめ
研究者らは,従来の方法を使って,新しいクリープ抵抗性鋼材を開発した. 炭酸水素ナノ粒子で強化されたこの新素材は,高温性能を大幅に改善し,経済的な大規模生産を可能にします.
科学分野:
- 材料科学 材料科学とは
- メタルルジーは,金属の製造業です.
背景:
- クリープ (Creep) とは,低ストレス下での時間依存のプラスチック変形であり,高温アプリケーションでは非常に重要です.
- ナノ粒子による分散強化は金属の爬行抵抗性を高めますが,現在の方法は大規模生産には経済的に実現不可能です.
- 高温クリープ耐性フェリート鋼は,イットリウム酸化ナノ粒子を使用していますが,機械的な合金による導入は複雑で高価です.
研究 の 目的:
- 従来の加工技術を用いた新種のクリープ抵抗性鋼材を開発する.
- マルテンシート鋼における分散強化のためのナノメートルスケールの炭酸水素粒子の有効性を調査する.
- 新しい材料の高温性能と断裂耐性を評価するために.
主な方法:
- ナノメートルスケールの炭酸ガスの粒子を分散した9%のCrマルテンシート鋼の生産.
- 材料の製造のために従来の加工技術を活用する.
- 923 Kのクリープ抵抗を評価し,断裂耐久性を評価する.
主要な成果:
- 開発された鋼は,現在の滑り抵抗性鋼と比較して,923 Kで破裂までの時間が2桁増加しています.
- クリープ抵抗の強化は,熱的に安定した炭酸ガスの沈殿物による境界の固定に起因する.
- この材料は,実用的な用途のために十分な断裂耐久性を示しています.
結論:
- 新型分散強化マルテンシット鋼は,高温下でも優れたクリープ抵抗性を提供します.
- 従来の加工技術により,この改良された鋼材で大規模部品の経済的な製造が可能になります.
- この進歩は,厳しい産業用途のために,新しいグレードの滑り抵抗性鋼材を生み出せると期待されています.
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