JP6849800B2 - 単結晶造形物を作製する方法、使用及び装置 - Google Patents
単結晶造形物を作製する方法、使用及び装置 Download PDFInfo
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Description
−電磁波ビーム又は粒子照射ビームのビームサイズ、焦点ボケ状態、及び/又はビームプロファイル、
−堆積した原料粉体の選択エリアが電磁波ビーム又は粒子照射ビームに曝される時間、
−照射パターン、
−照射部位を堆積した原料粉体層を横切って移動させる速度、
−積層軸に沿い、及び/又は現在照射を受けている原料粉体層の平面内の再溶融速度、
−基材上に塗布される原料粉体層の選択エリアに入射する電磁波ビーム又は粒子照射ビームのエネルギー。
−基材は、造形物を作製又は修復するために利用可能な積層エリアの少なくとも約0.1%、少なくとも約10%、少なくとも約25%、少なくとも約50%、少なくとも約75%、又は約100%を受け持つこと、
−基材は実質的な平板状部材として構成され、例えば実質的な矩形平面を画定すること、
−積層軸に沿った基材の厚さは、約1000mm以下、約200mm以下、約100mm以下、約50mm以下、又は約10mm以下であること、
−基材は、例えば修復される必要がある単結晶造形物であること、のうち少なくとも1つの条件を満たす。
−少なくとも1つの基材と、
−第1の原料粉体層を基材の上に堆積させるように構成した粉体塗布装置と、
−堆積した原料粉体層の選択エリアに対して、電磁波ビーム又は粒子照射ビームを部位選択的に、作製対象の三次元造形物層の幾何学形状に一致する照射パターンに従って照射するように構成した照射装置と、
−基材と基材の上に堆積する原料粉体層との間に金属結合を形成するように照射装置を制御する制御ユニットと、を備える。
積層軸Zに沿って約10mmの高さを有する、単結晶を主体とする造形物が材料IN738LCから図1の装置を用いて生成されている。この材料は、基材15及び基材の上に堆積する原料粉体の両方に対応して使用されている。
Claims (14)
- 単結晶微細構造を有する三次元金属造形物を作製又は修復する方法であって、
−少なくとも1つの単結晶基材(15)を供給するステップと、
−第1の金属原料粉体層を前記単結晶基材(15)の上に堆積させるステップと、
−堆積した金属原料粉体層の選択エリアに対して、電磁波ビーム又は粒子照射ビーム(22)を部位選択的に、作製対象の前記三次元金属造形物の層の少なくとも一部の幾何学形状に一致する照射パターンに従って照射するステップと、を含み、
−照射は前記単結晶基材(15)と該単結晶基材の上に堆積する前記金属原料粉体層との間に金属結合を形成するように制御され、
前記照射は以下の条件を満たすように制御される、すなわち、
−現在照射を受けている金属原料粉体層の平面内の再溶融率Rxは以下の条件を満たす、すなわち、Rx>0.3であり、式中でRx=((W−dy)/W)の関係があり、Wは溶融物貯留幅であり、dyは前記金属原料粉体層の隣接する照射部位の間の距離であり、距離dyは隣接スキャンベクトルによって定義され、それぞれの照射部位は前記隣接スキャンベクトルに沿って配置される、方法。 - 前記第1の金属原料粉体層に対する照射が完了した後、複数回連続して後続の金属原料粉体層を堆積させて後続の金属原料粉体層に対して照射を行なうことにより、前記三次元造形物を積層軸(Z)に沿って連続的に積層させる請求項1に記載の方法。
- 積層軸(Z)に沿った再溶融率Rzは、以下の条件を満たす、すなわち、Rz>0.3であり、式中でRz=((D−Iz)/D)の関係があり、Izは現在照射を受けている前記金属原料粉体層の層厚さであり、Dは前記照射の結果として発生する溶融物貯留深さである請求項1又は2に記載の方法。
- 更に、
−前記単結晶基材(15)の結晶方位を調整して前記積層軸(Z)に一致させるステップを含む請求項3に記載の方法。 - 更に、
−前記単結晶基材(15)の結晶方位、及び層に対する照射を行なうと発生する前記三次元造形物の層中の粒子成長方向を調整して互いに一致させるステップを含む請求項1〜4の何れか一項に記載の方法。 - 以下のパラメータ、
−前記電磁波ビーム又は粒子照射ビーム(22)のビームサイズ、焦点ボケ状態、及び/又はビームプロファイル、
−堆積した金属原料粉体の選択エリアが前記電磁波ビーム又は粒子照射ビーム(22)に曝される時間、
−前記照射パターン、
−照射部位を、堆積した金属原料粉体層を横切って移動させる速度、
−前記単結晶基材(15)の上に塗布される前記金属原料粉体層の前記選択エリアに入射する前記電磁波ビーム又は粒子照射ビーム(22)のエネルギーのうちの少なくとも1つのパラメータを使用して前記照射を制御する請求項1〜5の何れか一項に記載の方法。 - 前記少なくとも1つのパラメータは、後続の前記金属原料粉体層のうちの少なくとも幾つかの金属原料粉体層の間で一定である請求項6に記載の方法。
- 前記照射を調整し、金属原料粉体の結晶化挙動に応じて前記三次元造形物の単結晶層が形成されるようにする請求項1〜7の何れか一項に記載の方法。
- 前記単結晶基材(15)は以下の条件の少なくとも一つを満たす、すなわち、その条件は、
−前記単結晶基材(15)は、該単結晶基材の上に金属原料粉体層を堆積させて前記三次元造形物を作製するために利用することができる積層エリアの少なくとも0.1%をカバーすること、
−前記単結晶基材(15)は、実質的な平板状の部材として構成されること、例えば矩形平面を画定すること、
−積層軸(Z)に沿った前記単結晶基材(15)の厚さは、1000mm以下であること、
−前記単結晶基材(15)は単結晶造形物であること、である請求項1〜8の何れか一項に記載の方法。 - 更に、既成造形物を前記単結晶基材(15)から分離して、任意であるが、前記単結晶基材(15)を別の造形物を作製するために再使用するステップを含む請求項1〜9の何れか一項に記載の方法。
- 更に、堆積した金属原料粉体層に対する照射を行なって造形物層を作製する前に、堆積した金属原料粉体層を予備加熱するステップを含む請求項1〜10の何れか一項に記載の方法。
- 一方向照射パターン、又は反対方向スキャンベクトル又はハッチベクトルを含む多方向照射パターンを使用する請求項1〜11の何れか一項に記載の方法。
- 単結晶微細構造を有する三次元金属造形物を作製又は修復する装置(10)であって、
−少なくとも1つの単結晶基材(15)と、
−第1の金属原料粉体層を前記単結晶基材(15)の上に堆積させるように構成した粉体塗布装置(14)と、
−堆積した金属原料粉体層の選択エリアに対して、電磁波ビーム又は粒子照射ビーム(22)を部位選択的に、作製対象の前記三次元金属造形物の層の幾何学形状に一致する照射パターンに従って照射するように構成した照射装置(20)と、
−前記単結晶基材(15)と該単結晶基材の上に堆積する前記金属原料粉体層との間に金属結合を形成するために、前記照射装置(20)を制御するように構成された制御ユニット(38)と、を備え、
前記制御ユニット(38)は以下の条件を満たすように前記照射装置(20)を制御する、すなわち、
−現在照射を受けている金属原料粉体層の平面内の再溶融率Rxは以下の条件を満たす、すなわち、Rx>0.3であり、式中でRx=((W−dy)/W)の関係があり、Wは溶融物貯留幅であり、dyは前記金属原料粉体層の隣接する照射部位の間の距離であり、距離dyは隣接スキャンベクトルによって定義され、それぞれの照射部位は前記隣接スキャンベクトルに沿って配置される、装置。 - 積層軸(Z)に沿った再溶融率Rzは以下の条件を満たす、すなわち、Rz>0.3であり、式中でRz=((D−Iz)/D)の関係があり、Izは現在照射を受けている前記金属原料粉体層の層厚さであり、Dは前記照射の結果として発生する溶融物貯留深さである請求項13に記載の装置。
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