JP6002231B2 - チタン及びチタンアルミナイド合金を鋳造するためのモールド組成物及びその方法 - Google Patents
チタン及びチタンアルミナイド合金を鋳造するためのモールド組成物及びその方法 Download PDFInfo
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- JP6002231B2 JP6002231B2 JP2014537125A JP2014537125A JP6002231B2 JP 6002231 B2 JP6002231 B2 JP 6002231B2 JP 2014537125 A JP2014537125 A JP 2014537125A JP 2014537125 A JP2014537125 A JP 2014537125A JP 6002231 B2 JP6002231 B2 JP 6002231B2
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/181—Cements, oxides or clays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/005—Castings of light metals with high melting point, e.g. Be 1280 degrees C, Ti 1725 degrees C
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00939—Uses not provided for elsewhere in C04B2111/00 for the fabrication of moulds or cores
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Civil Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
本開示の態様は、チタン及びチタン合金の改善された構成要素を提供できるインベストメント鋳造モールド用の物質組成を提供する。本開示の1つの態様において、カルシウムモノアルミネートは、アルミン酸カルシウムセメントの形態で提供することができる。アルミン酸カルシウムセメントは、「セメント」又は「バインダ」と呼ぶことができる。特定の実施形態において、アルミン酸カルシウムセメントは、アルミナ粒子状物質と混合されて鋳造性インベストメントモールド混合物を提供する。アルミン酸カルシウムセメントは、鋳造性モールド混合物中に約30重量%よりも多いものとすることができる。特定の実施形態において、アルミン酸カルシウムセメントは、鋳造性モールド混合物中に約30%と約60重量%の間である。鋳造性モールド混合物(鋳造モールド組成物)中に約30重量%よりも多いアルミン酸カルシウムセメントの使用は、本開示の特徴である。アルミン酸カルシウムセメントの適切な化学的性質及びアルミナ配合の選択は、モールド性能の要因である。1つの態様において、チタン合金との反応を最小限にするために、十分な量の酸化カルシウムをモールド組成物中に提供することができる。
本開示の態様において使用されるアルミン酸カルシウムセメントは、カルシウム及びアルミニウムの少なくとも3つの相又は成分、すなわち、カルシウムモノアルミネート(CaAl2O4)、二アルミン酸カルシウム (CaAl4O7)、及びマイエナイト(Ca12Al14O33)を含む。カルシウムモノアルミネートは、カルシウムアルミナセメント中に存在する水硬性無機物である。カルシウムモノアルミネートの水和反応は、インベストメントモールドの高い初期強度をもたらす。マイエナイトは、水和結合の早期形成に起因してモールド硬化の初期段階中の強度をもたらすので、セメントにおいて望ましいものである。しかしながら、マイエナイトは通常、鋳造前のモールドの熱処理中に除去される。
インベストメントモールドは、セラミック成分のインベストメント混合物を配合し、散逸性パターンを含むベッセル内にこの混合物を注入することにより形成される。パターン上に形成されたインベストメントモールドは、完全に硬化されていわゆる「グリーンモールド」を形成することができる。通常、グリーンモールドの硬化は、1時間〜48時間で実施される。その後、散逸性パターンは、溶融、溶解、着火、AM他は他の既知のパターン技術によってグリーンモールドから選択的に除去される。ワックスパターン除去の典型的な方法は、オーブンワックス除去(150℃未満)、炉ワックス除去(150℃超)、蒸気オートクレーブワックス除去、及びマイクロ波ワックス除去を含む。
図1は、アルミナ及びカルシア組成物並びに温度に応じた安定相を示す状態図である。状態図にはまた、本開示の実施形態による、モールドのバルクにおける例示的な組成範囲が示されている。図1は、x軸に酸化アルミニウムの割合を、y軸に温度を示している。第1の例示的な範囲5は、マイエナイト及びカルシウムモノアルミネート(15)、二アルミン酸カルシウム及びカルシウムモノアルミネート(20)についての例示的な組成範囲及び相を示す。別の例示的な範囲10は、二アルミン酸カルシウム及びカルシウムモノアルミネートを主として含む例示的な組成範囲及び相を示す。両方の範囲15、20の外側には、二アルミン酸カルシウム及びヘキサアルミン酸カルシウム(25)がある。
アルミン酸カルシウムセメントをアルミナと混合してインベストメントモールド混合物を生成し、インベストメントモールドの化学的性質を試験した。一例のインベストメント混合物は、70%及び30%カルシアを有するアルミン酸カルシウムセメント、アルミナ粒子、水、及びコロイドシリカからなるものであった。
Claims (8)
- チタン含有物品を鋳造するためのモールド組成物であって、
カルシウムモノアルミネート、二アルミン酸カルシウム、及びマイエナイトを有するアルミン酸カルシウムセメントを含み、
前記マイエナイトが前記アルミン酸カルシウムセメントの0.01〜0.2の体積分率を含み、前記カルシウムモノアルミネートが前記アルミン酸カルシウムセメントの0.1〜0.8の体積分率を含み、前記二アルミン酸カルシウムが前記アルミン酸カルシウムセメントの0.1〜0.6の体積分率を含み、
前記モールド組成物は、外部寸法が500ミクロン未満の酸化アルミニウム粒子を更に含み、該酸化アルミニウム粒子が、前記モールド組成物の40重量%〜68重量%を含む
チタン含有物品を鋳造するためのモールド組成物。 - 酸化物粒子を更に含む、請求項1に記載のモールド組成物。
- 前記酸化物粒子が、前記酸化アルミニウム粒子、酸化マグネシウム粒子、酸化カルシウム粒子、酸化ジルコニウム粒子、酸化チタン粒子、酸化ケイ素粒子、又はこれらの組み合わせを含む、請求項2に記載のモールド組成物。
- 前記酸化物粒子が中空酸化物粒子を含む、請求項2又は3に記載のモールド組成物。
- 前記中空酸化物粒子が中空アルミナ球体を含む、請求項4に記載のモールド組成物。
- 酸化カルシウムを更に含む、請求項1乃至5のいずれか1項に記載のモールド組成物。
- 前記酸化カルシウムが、モールド組成物の10重量%よりも多く50重量%よりも少ない、請求項1に記載のモールド組成物。
- 前記モールド組成物が、ニアネットシェイプ・チタンアルミナイド物品を鋳造するためのインベストメント鋳造モールド組成物を含む、請求項1乃至7のいずれか1項に記載のモールド組成物。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/284,312 | 2011-10-28 | ||
US13/284,312 US8858697B2 (en) | 2011-10-28 | 2011-10-28 | Mold compositions |
PCT/US2012/059842 WO2013062787A1 (en) | 2011-10-28 | 2012-10-12 | Mold compositions and methods for casting titanium and titanium aluminide alloys |
Publications (2)
Publication Number | Publication Date |
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JP2014532562A JP2014532562A (ja) | 2014-12-08 |
JP6002231B2 true JP6002231B2 (ja) | 2016-10-05 |
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Application Number | Title | Priority Date | Filing Date |
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JP2014537125A Expired - Fee Related JP6002231B2 (ja) | 2011-10-28 | 2012-10-12 | チタン及びチタンアルミナイド合金を鋳造するためのモールド組成物及びその方法 |
Country Status (7)
Country | Link |
---|---|
US (2) | US8858697B2 (ja) |
EP (1) | EP2771139A1 (ja) |
JP (1) | JP6002231B2 (ja) |
CN (1) | CN103889614B (ja) |
BR (1) | BR112014009015A2 (ja) |
CA (1) | CA2852910C (ja) |
WO (1) | WO2013062787A1 (ja) |
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US8708033B2 (en) * | 2012-08-29 | 2014-04-29 | General Electric Company | Calcium titanate containing mold compositions and methods for casting titanium and titanium aluminide alloys |
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US20150078912A1 (en) * | 2013-09-18 | 2015-03-19 | General Electric Company | Ceramic core compositions, methods for making cores, methods for casting hollow titanium-containing articles, and hollow titanium-containing articles |
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CN103889614A (zh) | 2014-06-25 |
CA2852910C (en) | 2016-12-06 |
US8858697B2 (en) | 2014-10-14 |
US20130108459A1 (en) | 2013-05-02 |
EP2771139A1 (en) | 2014-09-03 |
BR112014009015A2 (pt) | 2017-05-09 |
CN103889614B (zh) | 2016-07-27 |
US20150040801A1 (en) | 2015-02-12 |
US9095893B2 (en) | 2015-08-04 |
CA2852910A1 (en) | 2013-05-02 |
WO2013062787A1 (en) | 2013-05-02 |
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