GB1360747A - Method of producing directionally solidified cast alloy articles - Google Patents
Method of producing directionally solidified cast alloy articlesInfo
- Publication number
- GB1360747A GB1360747A GB5167172A GB5167172A GB1360747A GB 1360747 A GB1360747 A GB 1360747A GB 5167172 A GB5167172 A GB 5167172A GB 5167172 A GB5167172 A GB 5167172A GB 1360747 A GB1360747 A GB 1360747A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- alloy
- columnar
- grained
- flask
- 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
Links
- 239000000956 alloy Substances 0.000 title abstract 11
- 229910045601 alloy Inorganic materials 0.000 title abstract 11
- 238000005266 casting Methods 0.000 abstract 3
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 abstract 2
- 239000010425 asbestos Substances 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000003303 reheating Methods 0.000 abstract 1
- 229910052895 riebeckite Inorganic materials 0.000 abstract 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
1360747 Casting processes GENERAL MOTORS CORP 9 Nov 1972 [15 Feb 1972] 51671/72 Heading B3F A columnar-grained unidirectionally solidified cast alloy article (e.g. a turbine blade) is made by pouring a molten alloy into a ceramic mould having an open-ended cavity, allowing the alloy partially or wholly to solidify, reheating the mould and the alloy to a temperature above the melting range of the alloy and allowing the mould to cool with the open end of the mould cavity in contact with a chill plate. When casting turbine blades a shell-mould 10 is provided with a branched runner system 16 leading to several blade-forming cavities 12 (each having an open end 13) from a sprue 14. The mould 10 is located in a tapered flask 20 (having an asbestos layer 23) upon a heat-insulated support 13. The mould having been preheated to, e.g. 2000 F., the mould/flask assembly is located in a vacuum chamber (not shown) and molten alloy, e.g. at 2900 F. poured into the mould. The alloy is allowed to solidify, at least in the open ends 13 of the cavities 12 and removed from the vacuum chamber on to a chill-plate 18. Pebbles 23 of exothermic composition, e.g. burning at 3100 F. are packed around the mould and ignited to remelt the alloy. Due to the tapering shape of the flask 20 a temperature gradient is set up in the mould and the alloy cools from the base upwardly to form columnar-grained unidirectionally solidified castings. An air-tight hood 30 may cover the mould whilst the metal solidifies and hexamethylenetetra-amine may be placed in the sprue 14 to evaporate and form a reducing atmosphere. Inert gas, e.g. Ar can be introduced into the hood 30. In order to form a turbine blade where the root has an equiaxed structure and the airfoil part has a columnar grained structure only that part of the cast alloy forming the airfoil is remelted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22649172A | 1972-02-15 | 1972-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1360747A true GB1360747A (en) | 1974-07-24 |
Family
ID=22849119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5167172A Expired GB1360747A (en) | 1972-02-15 | 1972-11-09 | Method of producing directionally solidified cast alloy articles |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3754592A (en) |
| CA (1) | CA992723A (en) |
| GB (1) | GB1360747A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3926245A (en) * | 1973-09-28 | 1975-12-16 | Gen Motors Corp | Method for producing directionally solidified cast alloy articles and apparatus therefor |
| US4062399A (en) * | 1975-12-22 | 1977-12-13 | Howmet Turbine Components Corporation | Apparatus for producing directionally solidified castings |
| GB2112309B (en) * | 1981-12-23 | 1986-01-02 | Rolls Royce | Making a cast single crystal article |
| US4850419A (en) * | 1982-09-01 | 1989-07-25 | Trw Inc. | Method of casting a one-piece wheel |
| US4550764A (en) * | 1983-12-22 | 1985-11-05 | Trw Inc. | Apparatus and method for casting single crystal articles |
| US5042561A (en) * | 1988-03-30 | 1991-08-27 | Hitchiner Manufacturing Co., Inc. | Apparatus and process for countergravity casting of metal with air exclusion |
| US5607007A (en) * | 1994-10-19 | 1997-03-04 | Hitchiner Manufacturing Co., Inc. | Directional solidification apparatus and method |
| US6443215B1 (en) * | 1998-12-31 | 2002-09-03 | Hayes Lemmerz International, Inc. | Vehicle wheel mold with a retractable ball cap |
| US6446698B1 (en) * | 2001-03-12 | 2002-09-10 | Howmet Research Corporation | Investment casting with exothermic material |
| TWI403372B (en) * | 2007-12-28 | 2013-08-01 | Chung Shan Inst Of Science | The methods of fabricating high quality integrally cast turbine wheel |
| US8870999B2 (en) * | 2011-11-04 | 2014-10-28 | GM Global Technology Operations LLC | Apparatus and method for degassing cast aluminum alloys |
| US20140030545A1 (en) * | 2012-07-27 | 2014-01-30 | United Technologies Corporation | Article With Grouped Grain Patterns |
| CN103192063B (en) * | 2013-04-01 | 2015-03-11 | 东方电气集团东方汽轮机有限公司 | Casting mold for producing high-temperature alloy single crystal blades and directional solidification device thereof |
| CN110315033A (en) * | 2019-07-04 | 2019-10-11 | 深圳市万泽中南研究院有限公司 | Ceramic shell mould and its manufacturing method for casting single crystal blade |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE543809C (en) * | 1927-08-04 | 1932-02-10 | Heraeus Vacuumschmelze Akt Ges | Process for the production of the refractory lining for metallurgical furnaces, in particular induction furnaces |
| US2951272A (en) * | 1958-09-22 | 1960-09-06 | Gen Electric | Method and apparatus for producing grain-oriented ingots |
| US3204301A (en) * | 1960-10-24 | 1965-09-07 | M C Flemings Jr | Casting process and apparatus for obtaining unidirectional solidification |
| US3441078A (en) * | 1967-02-01 | 1969-04-29 | Trw Inc | Method and apparatus for improving grain structures and soundness of castings |
| US3667533A (en) * | 1970-04-28 | 1972-06-06 | United Aircraft Corp | Making directionally solidified castings |
-
1972
- 1972-02-15 US US00226491A patent/US3754592A/en not_active Expired - Lifetime
- 1972-10-24 CA CA154,687A patent/CA992723A/en not_active Expired
- 1972-11-09 GB GB5167172A patent/GB1360747A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3754592A (en) | 1973-08-28 |
| CA992723A (en) | 1976-07-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |