添加加工による高強度ダマスカス鋼
Philipp Kürnsteiner1, Markus Benjamin Wilms2, Andreas Weisheit2
1Department Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany. p.kuernsteiner@mpie.de.
Nature
|June 26, 2020
まとめ
レーザー添加物製造用の新しいFe19Ni5Ti鋼は,ニッケル-チタンのナノプレシピテーションとマーテンサイト形成により,現地硬化されます. この過程で 柔らかい層と硬い層が交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互に交互する.
科学分野:
- 材料科学
- 金属工学
- アディティブ製造
背景:
- レーザー添加製造 (LAM) は,金属粉末から複雑な3D部品の製造を可能にします.
- LAMは加工パラメータをデジタル制御し,合金マイクロ構造に影響を与えます.
- LAMの固有の熱処理は,合金におけるin situの降水を引き起こします.
研究 の 目的:
- LAM用の新しいFe19Ni5Ti鋼を開発する.
- ナノプレシピテーションとマーテンシット変換による in situ 硬化を実現する.
- 機械的な性質を合わせた 複雑で多面的な微細構造を作り出す
主な方法:
- Fe19Ni5Ti合金鋼のデザイン
- 添加式レーザー製造の応用
- 制御されたニッケル-チタンナノプレシピテーションとマーテンシット変換.
- 複数の長さのスケールで微細構造の特徴づけ
主要な成果:
- 200°Cでのニッケル-チタンのナノプレシピテーションとマルテンサイト形成による鉄鋼の現場で硬化.
- マイクロからナノスケールまでの複雑なマイクロ構造の階層の作成.
- ダマスカスの鋼にインスパイアされた 柔らかい層と硬い層の材料の製造
- 1,300MPaの引力強さと10%の伸縮を達成しました.
結論:
- 開発されたFe19Ni5Ti鋼は,古代ダマスカス鋼と比較して優れた機械的性質を示しています.
- 現場での降水強化と局所的な微細構造制御は,高度な材料特性を達成するための鍵です.
- 原則は,他の降水硬化合金および添加物製造プロセスに適用できます.
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