GB1149943A - Improvements in and relating to the casting of alloys containing carbon - Google Patents

Improvements in and relating to the casting of alloys containing carbon

Info

Publication number
GB1149943A
GB1149943A GB31054/66A GB3105466A GB1149943A GB 1149943 A GB1149943 A GB 1149943A GB 31054/66 A GB31054/66 A GB 31054/66A GB 3105466 A GB3105466 A GB 3105466A GB 1149943 A GB1149943 A GB 1149943A
Authority
GB
United Kingdom
Prior art keywords
mould
casting
protective substance
temperature
pattern
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
GB31054/66A
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.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
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 Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of GB1149943A publication Critical patent/GB1149943A/en
Expired legal-status Critical Current

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
    • B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

1,149,943. Mould and core materials. SULZER BROS Ltd. 11 July, 1966 [29 July, 1965], No. 31054/66. Heading B3F. [Also in Division C3] In a method of casting alloys containing carbon the mould material includes a protective substance which may be a silicide or a mixture of silicides, to prevent de-carburization and pitting of the surface of the casting due to oxygen infiltration through the mould during cooling, the protective substance being able to combine chemically with oxygen during cooling of the casting at mould temperatures above the firing temperature of the mould and having a melting point which is below the pouring temperature of the alloy but above the firing temperature of the mould. In an example described the mould material comprises 250 Kg. of fire clay mixed with 25 Kg. of refractory cement and the protective substance in the form of 25 Kg. of calcium silicide is added. The mould is fired at about 900‹ C. which destroys a wax pattern therein and a 13% chromium steel is poured into the finished mould at a temperature of 1600‹ C., the melting point of the calcium silicide being about 1220‹ C. In another example a mould composition is prepared from a solution of five litres of ethyl-silicate, 2À5 litres of alcohol, 0À25 litres of water, 5 c.c. of 32% hydrochloric acid and 18 Kg. of zirconium flour. An urea pattern is successively dipped in the solution to build up coats on the pattern and the protective substance in the form of a powdered aluminium silicon alloy is sprinkled on between coats. The mould is air hardened, placed in a bath to dissolve the urea pattern, fired at 900‹ C. and then filled with a carbon steel at a temperature of 1600‹ C. The melting point of the aluminium silicon alloy was 1100‹C . and the alloy contained 0À8% C, 33% Si, 48% Al, 3% Ti and 13% Fe.
GB31054/66A 1965-07-29 1966-07-11 Improvements in and relating to the casting of alloys containing carbon Expired GB1149943A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1069765A CH426112A (en) 1965-07-29 1965-07-29 Process for protecting castings made from carbon-containing alloys against edge decarburization and surface defects

Publications (1)

Publication Number Publication Date
GB1149943A true GB1149943A (en) 1969-04-23

Family

ID=4365865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31054/66A Expired GB1149943A (en) 1965-07-29 1966-07-11 Improvements in and relating to the casting of alloys containing carbon

Country Status (5)

Country Link
US (1) US3470937A (en)
CH (1) CH426112A (en)
DE (1) DE1271909B (en)
GB (1) GB1149943A (en)
NL (2) NL6511828A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103170581A (en) * 2011-12-22 2013-06-26 杭州恒力泵业制造有限公司 Corrosion-resistant impeller casting process

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3512118A1 (en) * 1985-04-03 1986-10-16 Thyssen Industrie Ag, 4300 Essen METHOD FOR GENERATING AN IMPROVED FINE-NARROWNESS OF THE PRIMARY FABRIC AND / OR THE EUTEKTIKUM OF CASTING PARTS
US4766948A (en) * 1986-04-02 1988-08-30 Thyssen Industrie Ag Process for casting aluminum alloys
CN1049375C (en) * 1997-03-04 2000-02-16 齐齐哈尔车辆厂 Cast steel truck bolster and its making technique
CN1049376C (en) * 1997-03-04 2000-02-16 齐齐哈尔车辆厂 Cast steel side-frame and its making technique

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE383944C (en) * 1921-01-27 1923-10-23 Hubert A Myers Co Process for preventing metallic cast bodies from sticking to their mold
DE571602C (en) * 1929-11-09 1933-03-02 Jean Baptiste Durand mold
DE692173C (en) * 1937-09-16 1940-06-14 Kohle Und Eisenforschung G M B
NL182379B (en) * 1953-10-16 Everts & Van Der Weyden Nv METHOD OF MANUFACTURING A C-SHAPED RAIL CLAMP.
CH320021A (en) * 1953-12-18 1957-03-15 Sulzer Ag Process for preventing the edge decarburization of castings made from carbon-containing alloys
DE1117263B (en) * 1953-12-18 1961-11-16 Sulzer Ag Process for preventing the edge decarburization of castings made of carbon-containing alloys
US2948034A (en) * 1953-12-18 1960-08-09 Sulzer Ag Casting mold and method of casting carbon-containing alloys
US3215525A (en) * 1962-10-12 1965-11-02 Vanadium Corp Of America Deoxidation alloy
US3286312A (en) * 1965-03-29 1966-11-22 Little Inc A Refractory coated casting mold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103170581A (en) * 2011-12-22 2013-06-26 杭州恒力泵业制造有限公司 Corrosion-resistant impeller casting process
CN103170581B (en) * 2011-12-22 2016-07-27 杭州恒力泵业制造有限公司 A kind of corrosion-resistant pump vane casting technique

Also Published As

Publication number Publication date
NL126286C (en)
CH426112A (en) 1966-12-15
NL6511828A (en) 1967-01-30
DE1271909B (en) 1968-07-04
US3470937A (en) 1969-10-07

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