FR2358221A1 - Mould wash for centrifugal casting of copper alloys - in which zirconia, bonded with alumina, provides thermal conductivity and permeability - Google Patents

Mould wash for centrifugal casting of copper alloys - in which zirconia, bonded with alumina, provides thermal conductivity and permeability

Info

Publication number
FR2358221A1
FR2358221A1 FR7621472A FR7621472A FR2358221A1 FR 2358221 A1 FR2358221 A1 FR 2358221A1 FR 7621472 A FR7621472 A FR 7621472A FR 7621472 A FR7621472 A FR 7621472A FR 2358221 A1 FR2358221 A1 FR 2358221A1
Authority
FR
France
Prior art keywords
casting
mould
suspension
pref
amt
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.)
Granted
Application number
FR7621472A
Other languages
French (fr)
Other versions
FR2358221B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7621472A priority Critical patent/FR2358221A1/en
Publication of FR2358221A1 publication Critical patent/FR2358221A1/en
Application granted granted Critical
Publication of FR2358221B1 publication Critical patent/FR2358221B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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

Abstract

A chilled mould is coated prior to the centrifugal casting of copper or its alloys, using a suspension of powders to form a thin layer. The novelty is that to form a thermally-conducting layer which is permeable to gas, the suspension contains ZrO2 and an inorganic binder. Inorganic binder is pref. unsintered alumina, the pref. suspension consisting of water contg. fine-grained ZrO2, and the finest Al2O3 slurry, forming a layer on the internal wall of the mould with a uniform thickness of 0.1-0.3 mm. During coating with the suspension, the mould is pref. rotated at a slower speed than that used during centrifugal casting, and the mould is pref. preheated to 150 degrees C, before using the suspension. Amt. of gas inclusions on the outside surface of the casting is reduced, and the amt. of oxide and unsoundness in the bore of the casting is also reduced. Lower casting temps. can be employed so casting times are less and mould life is increased. Improvement in casting quality means that only a small amt. of the casting must be removed by machining.
FR7621472A 1976-07-13 1976-07-13 Mould wash for centrifugal casting of copper alloys - in which zirconia, bonded with alumina, provides thermal conductivity and permeability Granted FR2358221A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7621472A FR2358221A1 (en) 1976-07-13 1976-07-13 Mould wash for centrifugal casting of copper alloys - in which zirconia, bonded with alumina, provides thermal conductivity and permeability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7621472A FR2358221A1 (en) 1976-07-13 1976-07-13 Mould wash for centrifugal casting of copper alloys - in which zirconia, bonded with alumina, provides thermal conductivity and permeability

Publications (2)

Publication Number Publication Date
FR2358221A1 true FR2358221A1 (en) 1978-02-10
FR2358221B1 FR2358221B1 (en) 1982-05-07

Family

ID=9175689

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7621472A Granted FR2358221A1 (en) 1976-07-13 1976-07-13 Mould wash for centrifugal casting of copper alloys - in which zirconia, bonded with alumina, provides thermal conductivity and permeability

Country Status (1)

Country Link
FR (1) FR2358221A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488821A1 (en) * 1979-03-14 1982-02-26 Brugger Gottfried COATED FOR THE PRODUCTION OF A METAL CENTRIFUGAL CASTING COVER SHELL

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491096A (en) * 1945-08-31 1949-12-13 Austenal Lab Inc Casting mold
US3211560A (en) * 1961-12-18 1965-10-12 Caterpillar Tractor Co Mold wash composition and casting mold coated therewith
FR1501566A (en) * 1965-11-26 1967-11-10 Foseco Trading Ag Refractory linings for ingot molds
US3727666A (en) * 1971-08-16 1973-04-17 Howmet Corp Method of casting using a mold having a refractory coating thereon
GB1412256A (en) * 1972-01-24 1975-10-29 Foseco Int Production of metal ingots refractory dressings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491096A (en) * 1945-08-31 1949-12-13 Austenal Lab Inc Casting mold
US3211560A (en) * 1961-12-18 1965-10-12 Caterpillar Tractor Co Mold wash composition and casting mold coated therewith
FR1501566A (en) * 1965-11-26 1967-11-10 Foseco Trading Ag Refractory linings for ingot molds
US3727666A (en) * 1971-08-16 1973-04-17 Howmet Corp Method of casting using a mold having a refractory coating thereon
GB1412256A (en) * 1972-01-24 1975-10-29 Foseco Int Production of metal ingots refractory dressings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488821A1 (en) * 1979-03-14 1982-02-26 Brugger Gottfried COATED FOR THE PRODUCTION OF A METAL CENTRIFUGAL CASTING COVER SHELL

Also Published As

Publication number Publication date
FR2358221B1 (en) 1982-05-07

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Legal Events

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