IE36709B1 - Investment shell moulds - Google Patents

Investment shell moulds

Info

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
Application number
IE479/72A
Other versions
IE36709L (en
Original Assignee
Rem Metals 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 Rem Metals Corp filed Critical Rem Metals Corp
Publication of IE36709L publication Critical patent/IE36709L/en
Publication of IE36709B1 publication Critical patent/IE36709B1/en

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]
IE479/72A 1971-06-03 1972-04-12 Investment shell moulds IE36709B1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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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