IE36709B1 - Investment shell moulds - Google Patents
Investment shell mouldsInfo
- Publication number
- IE36709B1 IE36709B1 IE479/72A IE47972A IE36709B1 IE 36709 B1 IE36709 B1 IE 36709B1 IE 479/72 A IE479/72 A IE 479/72A IE 47972 A IE47972 A IE 47972A IE 36709 B1 IE36709 B1 IE 36709B1
- Authority
- IE
- Ireland
- Prior art keywords
- mold
- metallic
- molybdenum
- former
- pattern
- Prior art date
Links
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
- 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
- B22C1/165—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 in the manufacture of multilayered shell moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
An investment shell mold inhibited against reaction with molten titanium, zirconium and other reactive and refractory metals cast therein is made by investing a pattern with successive dip coats and stucco coats. The first dip coat includes a tungsten and/or molybdenum compound inhibitor-former which is reducible by hydrogen to metallic tungsten or molybdenum. After removal of the pattern, the green mold is dried and then pyrolyzed in an atmosphere of hydrogen under conditions predetermined to convert the inhibitor-former to metallic condition. This creates on the mold interface a coating of metallic molybdenum or tunsten which serves as a physical barrier, inhibiting reaction of a molten reactive or refractory metal subsequently cast in the mold, with the mold material and binder particles of the latter.
[US3743003A]
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14948571A | 1971-06-03 | 1971-06-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
IE36709L IE36709L (en) | 1972-12-03 |
IE36709B1 true IE36709B1 (en) | 1977-02-02 |
Family
ID=22530497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE479/72A IE36709B1 (en) | 1971-06-03 | 1972-04-12 | Investment shell moulds |
Country Status (13)
Country | Link |
---|---|
US (1) | US3743003A (en) |
JP (1) | JPS5219163B1 (en) |
AT (1) | AT328106B (en) |
BE (1) | BE784269A (en) |
CA (1) | CA972129A (en) |
CH (1) | CH554204A (en) |
DE (1) | DE2226947A1 (en) |
FR (1) | FR2140189B1 (en) |
GB (1) | GB1394872A (en) |
IE (1) | IE36709B1 (en) |
IT (1) | IT958188B (en) |
NL (1) | NL7207552A (en) |
SE (1) | SE388138B (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4159204A (en) * | 1972-02-01 | 1979-06-26 | Dynamit Nobel Aktiengesellschaft | Process for the manufacture of refractory ceramic products |
US4211567A (en) * | 1972-02-01 | 1980-07-08 | Dynamit Nobel Aktiengesellschaft | Process for the manufacture of refractory ceramic products |
US3802482A (en) * | 1972-03-09 | 1974-04-09 | United Aircraft Corp | Process for making directionally solidified castings |
US3892579A (en) * | 1973-03-22 | 1975-07-01 | American Dental Ass | Adhesive refractory protective composition for investment casting |
US3933190A (en) * | 1974-12-16 | 1976-01-20 | United Technologies Corporation | Method for fabricating shell molds for the production of superalloy castings |
US3972367A (en) * | 1975-06-11 | 1976-08-03 | General Electric Company | Process for forming a barrier layer on ceramic molds suitable for use for high temperature eutectic superalloy casting |
US4031945A (en) * | 1976-04-07 | 1977-06-28 | General Electric Company | Process for making ceramic molds having a metal oxide barrier for casting and directional solidification of superalloys |
FR2407770A1 (en) * | 1977-11-07 | 1979-06-01 | Rem Metals Corp | Mould for casting reactive and refractory metals - has an inert facing contg. metal (oxy)fluoride, heat sink material and binder |
US4533394A (en) * | 1982-09-30 | 1985-08-06 | Watts Claude H | Process for manufacturing shell molds |
US4703806A (en) * | 1986-07-11 | 1987-11-03 | Howmet Turbine Components Corporation | Ceramic shell mold facecoat and core coating systems for investment casting of reactive metals |
GB9601910D0 (en) * | 1996-01-31 | 1996-04-03 | Rolls Royce Plc | A method of investment casting and a method of making an investment casting mould |
US6766850B2 (en) * | 2001-12-27 | 2004-07-27 | Caterpillar Inc | Pressure casting using a supported shell mold |
AUPS329202A0 (en) * | 2002-07-01 | 2002-07-18 | Cast Centre Pty Ltd | Coatings for articles used with molten metal |
US7258158B2 (en) * | 2004-07-28 | 2007-08-21 | Howmet Corporation | Increasing stability of silica-bearing material |
US8932518B2 (en) | 2012-02-29 | 2015-01-13 | General Electric Company | Mold and facecoat compositions |
AU2012392281A1 (en) * | 2012-10-18 | 2015-04-02 | Cermatco Ltd | Investment binder and use of the investment binder |
CN103537620A (en) * | 2013-09-30 | 2014-01-29 | 中国航空工业集团公司北京航空材料研究院 | Preparation method for precision casting of mold shell through directional solidification investment casting of titanium-aluminum based alloy |
US9511417B2 (en) | 2013-11-26 | 2016-12-06 | General Electric Company | Silicon carbide-containing mold and facecoat compositions and methods for casting titanium and titanium aluminide alloys |
CN111545711B (en) * | 2020-05-19 | 2022-04-05 | 中国科学院金属研究所 | Preparation method of thermal shock resistant ceramic shell for high-temperature alloy LMC (melt-solidified metallic) directional solidification |
CN114570882A (en) * | 2022-03-10 | 2022-06-03 | 西部金属材料股份有限公司 | Preparation method of tungsten surface layer shell |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA868258A (en) * | 1971-04-13 | A. Brown Robert | Investment shell molds for the high integrity precision casting of reactive and refractory metals, and methods for their manufacture | |
US1772490A (en) * | 1926-01-13 | 1930-08-12 | Dow Chemical Co | Casting magnesium and alloys therefor |
US3158912A (en) * | 1962-08-09 | 1964-12-01 | Gen Electric | Controlled grain size casting method |
-
1971
- 1971-06-03 US US00149485A patent/US3743003A/en not_active Expired - Lifetime
-
1972
- 1972-04-12 IE IE479/72A patent/IE36709B1/en unknown
- 1972-04-12 CA CA139,506A patent/CA972129A/en not_active Expired
- 1972-04-25 JP JP47041695A patent/JPS5219163B1/ja active Pending
- 1972-05-26 AT AT456172A patent/AT328106B/en not_active IP Right Cessation
- 1972-05-31 IT IT50656/72A patent/IT958188B/en active
- 1972-06-01 CH CH812372A patent/CH554204A/en not_active IP Right Cessation
- 1972-06-01 BE BE784269A patent/BE784269A/en not_active IP Right Cessation
- 1972-06-02 GB GB2576572A patent/GB1394872A/en not_active Expired
- 1972-06-02 SE SE7207257A patent/SE388138B/en unknown
- 1972-06-02 FR FR7219890A patent/FR2140189B1/fr not_active Expired
- 1972-06-02 DE DE19722226947 patent/DE2226947A1/en not_active Withdrawn
- 1972-06-02 NL NL7207552A patent/NL7207552A/xx not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
US3743003A (en) | 1973-07-03 |
BE784269A (en) | 1972-10-02 |
CA972129A (en) | 1975-08-05 |
CH554204A (en) | 1974-09-30 |
NL7207552A (en) | 1972-12-05 |
ATA456172A (en) | 1975-05-15 |
FR2140189B1 (en) | 1977-12-16 |
DE2226947A1 (en) | 1972-12-28 |
GB1394872A (en) | 1975-05-21 |
SE388138B (en) | 1976-09-27 |
IT958188B (en) | 1973-10-20 |
IE36709L (en) | 1972-12-03 |
JPS5219163B1 (en) | 1977-05-26 |
AT328106B (en) | 1976-03-10 |
FR2140189A1 (en) | 1973-01-12 |
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