GB1285319A - Casting single crystal articles - Google Patents

Casting single crystal articles

Info

Publication number
GB1285319A
GB1285319A GB30796/71A GB3079671A GB1285319A GB 1285319 A GB1285319 A GB 1285319A GB 30796/71 A GB30796/71 A GB 30796/71A GB 3079671 A GB3079671 A GB 3079671A GB 1285319 A GB1285319 A GB 1285319A
Authority
GB
United Kingdom
Prior art keywords
moulds
article
mould
wax
cavities
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB30796/71A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Technologies Corp
Original Assignee
United Aircraft Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Aircraft Corp filed Critical United Aircraft Corp
Publication of GB1285319A publication Critical patent/GB1285319A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
    • C30B11/002—Crucibles or containers for supporting the melt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B22D27/045—Directionally solidified castings
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
    • C30B11/14—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method characterised by the seed, e.g. its crystallographic orientation
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/52—Alloys

Abstract

1285319 Casting moulds and processes; mould jackets UNITED AIRCRAFT CORP 1 July 1971 [14 Aug 1970] 30796/71 Heading B3F [Also in Division B5] Single crystal turbine blades are cast in a mould assembly comprising a number of articleforming moulds 2 (Fig. 2) in an annular jacket 22, 24. The mould assembly is made by providing a wax-pattern of a turbine blade 4 having at the lower end a helical passage 12 and cavity pattern 14, and at the upper end a runner pattern 10. Several such patterns are invested and the thereby formed article moulds are arranged in a ring with the turbine blade aerofoil leading edge of one mould adjacent the turbine blade aerofoil trailing edge of the next mould. Between the article moulds are spaces which are filled with wax 20. For each piece of wax 20, runner patterns 26, 28 are provided. At the top of the article moulds is placed a wax disc pattern 18 which will form a common sprue and which will interconnect runner patterns 26 and 10. The pattern assembly so-formed is reinvested to form a double walled mould assembly comprising article moulds interspaced by cavities and arranged in an annulus 22, 24. The wax patterns are melted out, and the mould assembly fired and placed within a furnace on a chill plate 30 so that cavities 14 and runners 28 are open to the chill plate. The mould assembly is preheated to above the melting temperature of an alloy to be cast therein. Alloy is poured and fills both the article moulds and cavities therebetween. Solidification commences from the chill plate upwardly in both runners 28 and cavities 14. The helix 12 selects a single crystal article to grow into the article moulds whilst columnar growth continues into the cavity. Heat is removed from the article moulds not only from the helix 12 but also from the cavities thereby increasing the rate of solidification of the single crystal turbine blades. In an alternative embodiment, the turbine blade faces of adjacent moulds are arranged opposing one another in the mould assembly.
GB30796/71A 1970-08-14 1971-07-01 Casting single crystal articles Expired GB1285319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6373870A 1970-08-14 1970-08-14

Publications (1)

Publication Number Publication Date
GB1285319A true GB1285319A (en) 1972-08-16

Family

ID=22051166

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30796/71A Expired GB1285319A (en) 1970-08-14 1971-07-01 Casting single crystal articles

Country Status (4)

Country Link
US (1) US3690368A (en)
AU (1) AU3061571A (en)
FR (1) FR2102255A1 (en)
GB (1) GB1285319A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259660A (en) * 1991-09-17 1993-03-24 Rolls Royce Plc A mould for casting components
US6557618B1 (en) 1997-09-12 2003-05-06 General Electric Company Apparatus and method for producing castings with directional and single crystal structure and the article according to the method

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927710A (en) * 1974-08-21 1975-12-23 United Technologies Corp Joining of multi-section ceramic molds
GB1584367A (en) * 1976-08-31 1981-02-11 Rolls Royce Mould assembly for producing multiple castings
US4133368A (en) * 1977-08-01 1979-01-09 United Technologies Corporation Single crystal casting mold and method for making same
US4180119A (en) * 1978-09-18 1979-12-25 Howmet Turbine Components Corporation Mold for directionally solidified single crystal castings and method for preparing same
GB2100633B (en) * 1981-06-11 1985-02-13 Rolls Royce Selector device for use in the casting of single crystal objects
US4475582A (en) * 1982-01-27 1984-10-09 United Technologies Corporation Casting a metal single crystal article using a seed crystal and a helix
FR2734188B1 (en) * 1982-09-28 1997-07-18 Snecma PROCESS FOR MANUFACTURING MONOCRYSTALLINE PARTS
US4763716A (en) * 1987-02-11 1988-08-16 Pcc Airfoils, Inc. Apparatus and method for use in casting articles
US4774992A (en) * 1987-06-15 1988-10-04 Pcc Airfoils, Inc. Apparatus and method for use in casting a plurality of articles
US5072771A (en) * 1988-03-28 1991-12-17 Pcc Airfoils, Inc. Method and apparatus for casting a metal article
US5273708A (en) * 1992-06-23 1993-12-28 Howmet Corporation Method of making a dual alloy article
US6050325A (en) * 1998-09-16 2000-04-18 Pcc Airfoils, Inc. Method of casting a thin wall
US8641381B2 (en) * 2010-04-14 2014-02-04 General Electric Company System and method for reducing grain boundaries in shrouded airfoils
CN104289674B (en) * 2014-10-24 2016-09-14 东方电气集团东方汽轮机有限公司 Gas turbine cylindrulite guide vane casting method
CN109351951B (en) * 2018-11-29 2020-12-22 中国科学院金属研究所 Process method for reducing loosening defect of single crystal blade platform

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581253A (en) * 1948-12-23 1952-01-01 Sintercast Corp America Metallurgy
US3494709A (en) * 1965-05-27 1970-02-10 United Aircraft Corp Single crystal metallic part
US3515205A (en) * 1968-03-20 1970-06-02 United Aircraft Corp Mold construction forming single crystal pieces
US3485291A (en) * 1968-06-07 1969-12-23 United Aircraft Corp Method of casting by directional solidification

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259660A (en) * 1991-09-17 1993-03-24 Rolls Royce Plc A mould for casting components
US6557618B1 (en) 1997-09-12 2003-05-06 General Electric Company Apparatus and method for producing castings with directional and single crystal structure and the article according to the method

Also Published As

Publication number Publication date
AU3061571A (en) 1973-01-04
US3690368A (en) 1972-09-12
FR2102255A1 (en) 1972-04-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees