JP6005850B2 - ニッケルベース超合金部品のレーザー追加的補修 - Google Patents
ニッケルベース超合金部品のレーザー追加的補修 Download PDFInfo
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Description
a)部品基板又は基板201上に粉末230を事前配置するステップであって、同一組成のビルドアップが望ましく、また粉末及び基板の両方が実質的に同一の組成を有するステップ(図3)、又は図4に示すように、移動レーザービーム242(若しくは他の方向付けされたエネルギービーム)の前及び後ろに粉末を配置するステップ;
b)略1200℃を超えるまで事前配置された粉末230を加熱するステップ;
c)事前配置された粉末230をレーザー240で融解して、略100ミクロン程度未満である熱影響部(HAZ)を作り出すようにするステップ;
d)固化された粉末250の冷却の際の各冷却ステップの間に、既知の比率のγ’を作り出すステップ;結果として、
e)γ及びγ’間でAl及びTiを分配し、溶融部(FZ)クラッキング感受性を低下させるステップ。
a)T 1 で1〜3分間保持する。
b)T2に冷却し、2〜15分間保持する:20%未満のγ’を作り出す。
c)T3に冷却し、2〜30分間保持する:20%未満のγ’を作り出す。
d)T4に冷却し、0.1〜2時間保持する:20%未満のγ’を作り出す。
・・・
Tnに冷却し、1〜20時間保持する(n=1〜20):20%未満のγ’を作り出す。
室温に冷却し、略20%未満である最終的なγ’含量を作り出す。
201 部品基板
210 チャンバー
220 不活性雰囲気
230 粉末
240 移動レーザー
242 レーザービーム
250 固化された粉末
260 誘導コイル
Claims (13)
- 有意なチタン(Ti)及びアルミニウム(Al)含量を有するニッケル(Ni)ベース超合金の補修の追加的ビルドアップのための方法であって、
a)有意なTi及びAl含量を有するNiベース超合金粉末を、前記Niベース超合金粉末と同一又は同様の組成である基板上に事前配置するステップと、
b)第1加熱源を用いて、事前配置された前記粉末を1200℃を超える温度まで事前加熱するステップと、
c)方向付けされたエネルギービーム第2加熱源の1以上のパスを用いて、100ミクロン未満の幅を有する熱影響部を作り出すように事前配置された前記粉末を融解し、融解が完了したときに前記第2加熱源を除去するステップと、
d)前記第1加熱源を用いて、融解された事前配置された前記粉末の制御された段階的保持冷却を実施し、既知の比率のγ’相が前記段階的保持冷却の間に形成されるようにするステップと、
e)追加的ビルドアップにおけるγ及びγ’相間のAl及びTiの分配がクラッキング感受性の低下をもたらすように、前記段階的保持冷却プロセスを調節するステップと、
を含む方法。 - 前記段階的保持冷却プロセスが、20重量パーセント以下のγ’相を作り出す、請求項1に記載の方法。
- 前記追加的ビルドアップの厚さが、1ミリメートルから10ミリメートルの範囲である、請求項1に記載の方法。
- 事前配置された前記粉末が、10ミクロンから100ミクロンの範囲の粒径を有する、請求項1に記載の方法。
- 前記ニッケルベース超合金部品の超合金は、713C、247、PW1480、MARM200、R77、PW1483、R80、U720、738、又はその混合物からなる群から選択される、請求項1に記載の方法。
- 初期温度T1から室温への前記制御された段階的保持冷却は、以下の複数のステップ:
a)1分から3分の範囲の時間にわたってT1で保持するステップと、
b)T1より低い温度T2に冷却し、2分から15分の範囲の時間にわたって保持し、20重量パーセント未満のγ’相を作り出すステップと、
c)T2より低い温度T3に冷却し、2分から30分の範囲の時間にわたって保持し、20重量パーセント未満のγ’相を作り出すステップと、
d)T3より低い温度T4に冷却し、6分から120分の範囲の時間にわたって保持し、20重量パーセント未満のγ’相を作り出すステップと、
e)T4から室温までの複数の冷却ステップにおいて室温に冷却し、ここで各ステップにおける温度は1時間から20時間にわたって維持され、20重量パーセント未満のγ’を作り出すステップと、
からなる、請求項1に記載の方法。 - 基板上での追加的ビルドアップ方法によって製造された、有意なチタン(Ti)及びアルミニウム(Al)含量を有するニッケル(Ni)ベース超合金材料であって、
a)Niベース超合金粉末を、同一又は同様の組成を有する基板上に配置すること;
b)第1加熱源を用いて、事前配置された前記粉末を1200℃を超える温度まで事前加熱すること;
c)第2移動レーザー加熱源の単一のパスを用いて、100ミクロン未満の幅を有する熱影響部を作り出すように事前配置された前記粉末を融解し、さらに、前記第2移動レーザー加熱源の前及び後ろに粉末を同時に事前配置すること;
c−1)前記第2移動レーザー加熱源をスキャンして、前記材料の所望の厚さが達成されるまで粉末の同時事前配置を複数回繰り返し、
c−2)前記第2移動レーザー加熱源を止めること;
d)前記第1加熱源を用いて、融解された事前配置された前記粉末の制御された段階的保持冷却を実施し、既知の比率のγ’相が前記段階的保持冷却の間に形成されるようにすること;
e)追加的ビルドアップにおけるγ及びγ’相間のAl及びTiの分配がクラッキング感受性の低下をもたらすように、前記段階的保持冷却プロセスを調節すること;
f)追加的ビルドアップにおけるγ及びγ’相間のAl及びTiの分配がクラッキング感受性の低下をもたらすように、前記段階的保持冷却プロセスを調節すること;
を含む、材料。 - 前記段階的保持冷却プロセスが、20重量パーセント以下のγ’相を作り出す、請求項7に記載の材料。
- 前記追加的ビルドアップの厚さが、1ミリメートルから50ミリメートルの範囲である、請求項7に記載の材料。
- 事前配置された前記粉末が、10ミクロンから100ミクロンの範囲の粒径を有する、請求項7に記載の材料。
- 前記ニッケルベース超合金部品の超合金は、713C、247、PW1480、MARM200、R77、PW1483、R80、U720、738、又はその混合物からなる群から選択される、請求項7に記載の材料。
- 初期温度T1から室温への前記制御された段階的保持冷却は、以下の複数のステップ:
a)1分から3分の範囲の時間にわたってT1で保持するステップと、
b)T1より低い温度T2に冷却し、2分から15分の範囲の時間にわたって保持し、20重量パーセント未満のγ’相を作り出すステップと、
c)T2より低い温度T3に冷却し、2分から30分の範囲の時間にわたって保持し、20重量パーセント未満のγ’相を作り出すステップと、
d)T3より低い温度T4に冷却し、6分から120分の範囲の時間にわたって保持し、20重量パーセント未満のγ’相を作り出すステップと、
e)T4から室温までの複数の冷却ステップにおいて室温に冷却し、ここで各ステップにおける温度は1時間から20時間にわたって維持され、20重量パーセント未満のγ’を作り出すステップと、
からなる、請求項7に記載の材料。 - 有意なチタン(Ti)及びアルミニウム(Al)含量を有するニッケル(Ni)ベース超合金の追加的ビルドアップの方法であって、
a)Niベース超合金粉末を、同一又は同様の組成を有する基板上に配置するステップと、
b)第1加熱源を用いて、事前配置された前記粉末を1200℃を超える温度まで事前加熱するステップと、
c)方向付けされたエネルギービーム第2加熱源の1以上のパスを用いて、100ミクロン未満の幅を有する熱影響部を作り出すように事前配置された前記粉末を融解し、融解が完了したときに前記第2加熱源を除去するステップと、
d)前記第1加熱源を用いて、融解された事前配置された前記粉末の制御された段階的保持冷却を実施し、既知の比率のγ’相が前記段階的保持冷却の間に形成されるようにするステップと、
e)追加的ビルドアップにおけるγ及びγ’相間のAl及びTiの分配がクラッキング感受性の低下をもたらすように、前記段階的保持冷却プロセスを調節するステップと、
を含む方法。
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US13/489,863 US9347124B2 (en) | 2011-11-07 | 2012-06-06 | Hold and cool process for superalloy joining |
US13/891,314 US9527162B2 (en) | 2011-11-07 | 2013-05-10 | Laser additive repairing of nickel base superalloy components |
US13/891,314 | 2013-05-10 | ||
PCT/US2013/040742 WO2014025432A2 (en) | 2012-05-11 | 2013-05-13 | Laser additive repairing of nickel base superalloy components |
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US9272369B2 (en) * | 2012-09-12 | 2016-03-01 | Siemens Energy, Inc. | Method for automated superalloy laser cladding with 3D imaging weld path control |
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JP3218567B2 (ja) * | 1990-09-28 | 2001-10-15 | クロームアロイ・ガス・タービン・コーポレイション | 高強力ニッケル基超合金類の溶接 |
US5554837A (en) * | 1993-09-03 | 1996-09-10 | Chromalloy Gas Turbine Corporation | Interactive laser welding at elevated temperatures of superalloy articles |
US6054672A (en) * | 1998-09-15 | 2000-04-25 | Chromalloy Gas Turbine Corporation | Laser welding superalloy articles |
US6124568A (en) * | 1998-12-31 | 2000-09-26 | General Electric Company | Heating apparatus for a welding operation and method therefor |
JP4201954B2 (ja) * | 2000-03-28 | 2008-12-24 | 株式会社東芝 | Ni基単結晶超合金からなるガスタービン翼の補修方法およびその装置 |
US6495793B2 (en) * | 2001-04-12 | 2002-12-17 | General Electric Company | Laser repair method for nickel base superalloys with high gamma prime content |
US6503349B2 (en) * | 2001-05-15 | 2003-01-07 | United Technologies Corporation | Repair of single crystal nickel based superalloy article |
US7137544B2 (en) * | 2002-12-13 | 2006-11-21 | General Electric Company | Apparatus and method for performing welding at elevated temperature |
US7156932B2 (en) * | 2003-10-06 | 2007-01-02 | Ati Properties, Inc. | Nickel-base alloys and methods of heat treating nickel-base alloys |
US20050178750A1 (en) * | 2004-02-13 | 2005-08-18 | Kenny Cheng | Repair of article by laser cladding |
US20070241169A1 (en) * | 2006-04-13 | 2007-10-18 | General Electric Company | Method for welding nickel-based superalloys |
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