JP2022530648A - 機械的に合金化された粉末原料 - Google Patents
機械的に合金化された粉末原料 Download PDFInfo
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Abstract
Description
この出願は、2019年4月30日に出願された、タイトル「MECHNICALLY
ALLOYED POWDER FEEDSTOCK」の米国特許仮出願番号第62/840,607号に対する利益を主張するものであり、その内容は、全体が参照により本明細書に組み込まれる。
ズマトーチの排気装置内で溶融および球状化して、球状化された粉末を形成することによって調製されることを特徴とする。
成することにより、機械的に粉砕された合金を作り出すことができる。合金化する他の方法も同様に使用されてよく、本開示は、機械的粉砕に限定されない。
を記載する。球形粉末は、次いで、工業粉末圧密プロセス、例えば、付加製造、金属射出成形、熱間静水圧加工および粉末鍛造の範囲で使用され得る。
ば、限定されないが、付加製造(AM)、金属射出成形(MIM)、粉末鍛造および熱間静水圧プレス(HIP)によって加工され得、HEAを主流の工業加工に付す。
マイクロ波プラズマ加工のための原料は、機械的合金化によって開発され得る。有利なことに、機械的合金化では、他の合金化方法、例えば、アーク溶解および誘導溶融によって製造することが困難または不可能である合金が開発され得る。機械的合金化によって形成され得る固有の合金には、従来の合金に対して固有の特性が実験室規模において実証されているHEAが含まれる。
インプラント用のTiZrNbTaFe HEAは、現在使用されているTi-6Al-4V合金と比較してかなり改良された耐食性を示している。AlFeVSi合金は、高い強度および高い熱安定性を有しており、潜在的な構造重量低減により航空機産業にとって興味深いものとなり得る。同様に、FeCoNiCrTiまたはFeCoNiCrAl HEAは、室温において並外れた引張特性を達成することが示されており、多くの産業用途に魅力的なものとなる。いくつかの実施形態において、FeCoCrNiCu HEAが使用され得る。
得る。
いくつかの実施形態において、プラズマ加工によって達成される最終の粒子は、球状または楕円状であり得、これらの用語は、互換可能に使用され得る。有利なことに、開示されている種々の原料のそれぞれに関連する重要かつ具体的な開示を使用することにより、原料の全てが、球形粉末に変換され得る。
次いで、当該理想化された表面積を粒子の測定された表面積As, actualと比較する:
ことによって算出され得る。
プロセスパラメータは、粉末の初期状態に応じて最大の球状化を得るように最適化され得る。それぞれの原料粉末特徴について、プロセスパラメータは、特定の結果のために最適化され得る。米国特許出願公開公報第2018/0297122号、米国特許第8,748,785号、および米国特許第9,932,673号は、開示されているプロセスにおいて、具体的にはマイクロ波プラズマ加工に使用され得るある特定の加工技術を開示している。したがって、米国特許出願公開公報第2018/0297122号、米国特許第8,748,785号、および米国特許第9,932,673号は、全体が参照により組み込まれ、当該技術は、本明細書に記載されている原料に適用可能であるとされるべきである。
金属(例えば、機械的合金化および/またはHEA)原料の加工に適用され得る。
例えば、アルゴン内に取り込まれるにつれて、概して粒子間の接触が最小となり、粒子凝集の発生を大幅に低減する。後プロセスの選別の必要性は、そのため、大幅に低減されまたは排除され、得られる粒度分布は、投入供給材料の粒度分布と事実上は同じであり得る。例示的な実施形態において、供給材料の粒度分布は、最終生成物において維持される。
層流のガス流(上方の矢印セット)を使用した取り込みによって加速される。第2の層流(下方の矢印セット)は、第2の環状ギャップを通して作り出されて、層流のシースを誘電性トーチ3の内壁に付与し、これを、プラズマ11からの熱放射に起因した溶融から保護することができる。例示的な実施形態において、層流は、軸12にできる限り近い経路に沿って粒子9、10をプラズマ11に向かわせ、粒子をプラズマ内の実質的に均一な温度に暴露する。
給する前に、供給材料314を保存するのに使用され得る。供給材料314は、プラズマトーチ302の長手方向に任意の角度、5、10、15、20、25、30、35、40、45、50、または55度で注入され得る。いくつかの実施形態において、原料は、5、10、15、20、25、30、35、40、45、50、または55度を超える角度で注入され得る。いくつかの実施形態において、原料は、5、10、15、20、25、30、35、40、45、50、または55度未満の角度で注入され得る。代替の実施形態において、原料は、プラズマトーチの長手軸に沿って注入され得る。
施において組み合わせて実行され得る。対照的に、単一の実施の文脈において記載されている様々な特徴もまた、複数の実施において別個に、または任意のサブコンビネーションにおいて実行され得る。また、特徴が、ある一定の組み合わせにおいて作用するとして上記に記載されている場合があるが、特許請求の範囲における組み合わせから1つ以上の特徴が、いくつかの場合において当該組み合わせから削除されている場合があり、当該組み合わせは、任意のサブコンビネーションまたは任意のサブコンビネーションの変形として特許請求されている場合がある。
素などの本明細書における開示は、本明細書において記載されている全ての他の実施形態において使用され得る。加えて、本明細書に記載されているいずれの方法も、列挙されているステップを実施するのに好適ないずれのデバイスを使用して実用されてもよいことが認識されよう。
Claims (20)
- 機械的に合金化された原料から球状化された粉末を製造するための方法であって:
少なくとも5つの元素粉末を機械的に粉砕して前記少なくとも5つの元素粉末を機械的に合金化することによって、機械的に合金化された粉末原料を調製する工程;
前記機械的に合金化された粉末原料を、マイクロ波プラズマトーチ、前記マイクロ波プラズマトーチのプラズマプルーム、および/または前記マイクロ波プラズマトーチの排気装置に導入する工程;ならびに
前記機械的に合金化された粉末原料を、前記マイクロ波プラズマトーチ、前記マイクロ波プラズマトーチの前記プラズマプルーム、および/または前記マイクロ波プラズマトーチの前記排気装置内で少なくとも部分的に溶融および球状化して、球状化された粉末を形成する工程
を含む、方法。 - 前記球状化された粉末が、金属射出成形プロセス、熱間静水圧加工、および/または付加製造における使用のために少なくとも部分的に溶融および球状化される、請求項1に記載の方法。
- 前記球状化された粉末が、熱間静水圧加工における使用のために少なくとも部分的に溶融および球状化される、請求項1に記載の方法。
- 前記球状化された粉末が、付加製造における使用のために少なくとも部分的に溶融および球状化される、請求項1に記載の方法。
- 前記機械的に合金化された粉末原料が、ボールミルによって機械的に粉砕される、請求項1~4のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Ti、Zr、Nb、Ta、Feを含む、請求項1~5のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Al、Fe、V、Siを含む、請求項1~5のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Fe、Co、Ni、Cr、Tiを含む、請求項1~5のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Fe、Co、Ni、Cr、Alを含む、請求項1~5のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Fe、Co、Ni、Cr、Cuを含む、請求項1~5のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、微細構造を含み、前記球状化された粉末が、微細構造を維持する、請求項1~10のいずれか一項に記載の方法。
- 機械的に合金化された原料から球状化された粉末を製造するための方法であって:
1つ以上の前駆体を機械的に粉砕して高エントロピー合金を形成することによって、機械的に合金化された粉末原料を調製する工程;
前記機械的に合金化された粉末原料を、マイクロ波プラズマトーチ、前記マイクロ波プラズマトーチのプラズマプルーム、および/または前記マイクロ波プラズマトーチの排気
装置に導入する工程;ならびに
前記機械的に合金化された粉末原料を、前記マイクロ波プラズマトーチ、前記マイクロ波プラズマトーチの前記プラズマプルーム、および/または前記マイクロ波プラズマトーチの前記排気装置内で少なくとも部分的に溶融および球状化して、球状化された粉末を形成する工程
を含む、方法。 - 前記球状化された粉末が、金属射出成形プロセスにおける使用のために少なくとも部分的に溶融および球状化される、請求項12に記載の方法。
- 前記球状化された粉末が、熱間静水圧加工における使用のために少なくとも部分的に溶融および球状化される、請求項12に記載の方法。
- 前記球状化された粉末が、付加製造における使用のために少なくとも部分的に溶融および球状化される、請求項12に記載の方法。
- 前記機械的に合金化された粉末原料が、ボールミルによって機械的に粉砕される、請求項12~15のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Ti、Zr、Nb、Ta、Feを含む、請求項12~16のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Al、Fe、V、Siを含む、請求項12~16のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Fe、Co、Ni、Cr、Tiを含む、請求項12~16のいずれか一項に記載の方法。
- 前記機械的に合金化された粉末原料が、Fe、Co、Ni、Cr、Alを含む、請求項12~16のいずれか一項に記載の方法。
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SG11202111576QA (en) | 2021-11-29 |
CA3134573A1 (en) | 2020-11-05 |
US11311938B2 (en) | 2022-04-26 |
KR20220002998A (ko) | 2022-01-07 |
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WO2020223358A1 (en) | 2020-11-05 |
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AU2020264446A1 (en) | 2021-11-18 |
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