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US3373794A - Ferroalloy casting process - Google Patents

Ferroalloy casting process Download PDF

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Publication number
US3373794A
US3373794A US524139A US52413966A US3373794A US 3373794 A US3373794 A US 3373794A US 524139 A US524139 A US 524139A US 52413966 A US52413966 A US 52413966A US 3373794 A US3373794 A US 3373794A
Authority
US
United States
Prior art keywords
chill
magnesium
casting
ferrosilicon
magnesium ferrosilicon
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 - Lifetime
Application number
US524139A
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English (en)
Inventor
Richard A Crago
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.)
Elkem Metals Co LP
Original Assignee
Union Carbide 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 Union Carbide Corp filed Critical Union Carbide Corp
Priority to US524139A priority Critical patent/US3373794A/en
Priority to NO166581A priority patent/NO120649B/no
Priority to JP42006273A priority patent/JPS5138645B1/ja
Priority to DEU13514A priority patent/DE1299802B/de
Priority to FR93357A priority patent/FR1509815A/fr
Application granted granted Critical
Publication of US3373794A publication Critical patent/US3373794A/en
Assigned to ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSHIP reassignment ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSHIP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNION CARBIDE CORPORATION, A NY CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D3/00—Pig or like casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product

Definitions

  • the present invention relates to the casting of alloys. More particularly the present invention relates to the casting of magnesium ferrosilicon.
  • magnesium ferrosilicon for use as an addition agent to pour the molten alloy into large open chills up to about five to six inches deep and about five feet by five feet in section.
  • the cast metal was permitted to air-cool and the solid product was then subjected to crushing to obtain a suitable industrially sized product of say 1% inches by inch.
  • FIGURE 1 shows, in elevation and somewhat schematically, apparatus for the practice of this invention
  • FIGURE 2 shows a modification of the apparatus of FIGURE 1
  • FIGURE 3 shows the plan view of the apparatus of FIGURE 2.
  • a process in accordance with the present invention comprises preparing molten magnesium ferrosilicon; pouring the molten magnesium ferrosilicon into a chill; providing a metal member in contact with the upper surface of the molten magnesium ferrosilicon; causing the molten magnesium ferrosilicon to solidify in the chill in contact with said metal member; removing the metal member after solidification of the magnesium ferrosilicon and removing the solidified magnesium ferrosilicon from the chill.
  • FIGURE 1 shows at 1 a conventional chill for casting magnesium ferrosilicon.
  • the chill for example can be made of cast iron 3,373,794 Patented Mar. 19, 1968 with a base about 4-6 inches thick and side walls about 5-10 inches in height tapering in width from 6 inches to 4 inches.
  • molten magnesium ferrosilicon is prepared by any suitable technique. For example, magnesium can be plunged into molten ferrosilicon alloy to give a desired magnesium content e.g. about 9%.
  • the metal 3 is poured into the chill 1 which is provided with a removable metal cover 5, which can be a steel billet about 4-6 inches thick or more and which is conveniently supported on steel mill balls 7.
  • a relatively small opening between the chill and the billet is provided at 9 for the entry of the molten metal which as shown is in an amount sufiicient to contact the metal member 5 and be substantially covered thereby.
  • metal cover member 5 by inclining metal cover member 5 slightly to the horizontal, the dross, i.e. low density impurities which are usually present, separate at the small exposed surface of the molten metal and surface contamination of the magnesium ferrosilicon is avoided.
  • the molten metal cast into the chill as aforedescribed freezes and solidifies, the solidification progressing concurrently from both the top and bottom of the chill, with the result that the magnesium segregation characteristic of castings prepared by prior methods is avoided. That is to say that the condition of high magnesium material i.e. 12-15% at the top of the casting, 4-7% at the bottom, is avoided by causing concurrent freezing of the casting at the top and bottom thus preventing separation of the lower melting and lower density magnesium sili con phase.
  • the covering metal member prevents contact with the air, but magnesium distribution is highly uniform from top to bottom in the casting.
  • the casting can be easily removed from the chill and readily crushed to industrially suitable size, in the course of which the supporting steel balls are recovered, and since there is practically no oxide formation on the casting, cleaning of the material is unnecessary.
  • FIGS 2 and 3 show different views of a modification of the apparatus of FIG- URE 1, it can be seen that the use of steel balls for supporting the removable chill cover 5 can be eliminated by using suspension bars 13 in the manner indicated.
  • FIG- URES 2 and 3 also show that the small exposed area of the casting can be further decreased by providing a pouring hole 15 in the removable cover and dimensioning the cover so that it closely fits the chill.
  • Example I Molten magnesium ferrosilicon containing 9% magnesium was prepared and at a temperature of about 1250 C. was cast into a chill.
  • the chill was similar to that shown in the drawing having a base thickness of 6 inches.
  • a steel billet 5 x 5' x 6" was suspended over the chill also as shown in the drawing and was arranged with its lower surface about 5 inches from the bottom of the chill.
  • the molten magnesium ferrosilicon poured into the chill was in contact with the steel billet at its upper surface and was substantially covered. After solidification of the metal in the chill, the casting, 5 inches thick, was removed and examined. There was no oxide on the surface of the casting and analysis showed the following magnesium analysis:
  • Example ll ysis of the casting after removing the oxide layer showed the following:
  • the present invention provides a simple and effective way to obtain higher recoveries of magnesium in magnesium ferrosilicon castings and also provides castings having an improved magnesium distribution, thus constituting a significant industrial advance in the art.
  • a process for casting magnesium ferrosilicon which comprises preparing molten magnesium ferrosilicon, pouring the molten magnesium ferrosilicon into a chill, providing a metal member in contact with the upper surface of the molten magnesium ferrosilicon in the chill, said metal member substantially covering the upper surface of the molten magnesium ferrosilicon, causing the molten magnesium fer-rosilicon to solidify in the chill in contact with said metal member, removing the metal member after solidification of the magnesium ferrosilicon and removing the solidified magnesium ferrosilicon from the chill.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US524139A 1966-02-01 1966-02-01 Ferroalloy casting process Expired - Lifetime US3373794A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US524139A US3373794A (en) 1966-02-01 1966-02-01 Ferroalloy casting process
NO166581A NO120649B (de) 1966-02-01 1967-01-26
JP42006273A JPS5138645B1 (de) 1966-02-01 1967-01-31
DEU13514A DE1299802B (de) 1966-02-01 1967-01-31 Giessform fuer Magnesium enthaltendes Ferrosilizium
FR93357A FR1509815A (fr) 1966-02-01 1967-02-01 Procédé de coulée d'alliages de ferro-silicium-magnésium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US524139A US3373794A (en) 1966-02-01 1966-02-01 Ferroalloy casting process

Publications (1)

Publication Number Publication Date
US3373794A true US3373794A (en) 1968-03-19

Family

ID=24087932

Family Applications (1)

Application Number Title Priority Date Filing Date
US524139A Expired - Lifetime US3373794A (en) 1966-02-01 1966-02-01 Ferroalloy casting process

Country Status (5)

Country Link
US (1) US3373794A (de)
JP (1) JPS5138645B1 (de)
DE (1) DE1299802B (de)
FR (1) FR1509815A (de)
NO (1) NO120649B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433283A (en) * 1968-04-03 1969-03-18 Ohio Ferro Alloys Corp Method of reducing friability of ferro-alloys
US3483916A (en) * 1968-01-31 1969-12-16 Union Carbide Corp Ferro alloy casting process
US3604494A (en) * 1966-10-04 1971-09-14 Metallgesellschaft Ag Process for the production of composite ingots of magnesium containing prealloys

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1070474A (en) * 1975-08-22 1980-01-29 Prem P. Mohla Nodularizing catalyst for cast iron and method of making same
JPS52140049U (de) * 1976-07-23 1977-10-24
JP6175345B2 (ja) * 2013-10-19 2017-08-02 株式会社Ｊｆｓ貿易 黒鉛球状化剤の製造法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1484076A (en) * 1920-10-26 1924-02-19 Valley Mould & Iron Corp Inverted horizontal ingot mold and process of casting
US1491881A (en) * 1920-10-21 1924-04-29 Valley Mould & Iron Corp Method, mold, and ingot
US1494021A (en) * 1920-04-08 1924-05-13 Robbins Lorin Roy Method of and apparatus for producing ingots
US1716833A (en) * 1926-03-06 1929-06-11 Riley Stoker Corp Method of casting
FR833609A (fr) * 1937-06-25 1938-10-26 Cie Des Forges De Chatillon Procédé pour localiser la retassure dans les lingots coulés à plat
GB516533A (en) * 1937-06-25 1940-01-04 Cie Des Forges De Chatillon Co Process for restricting the piping hole in flat cast ingots

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1494021A (en) * 1920-04-08 1924-05-13 Robbins Lorin Roy Method of and apparatus for producing ingots
US1491881A (en) * 1920-10-21 1924-04-29 Valley Mould & Iron Corp Method, mold, and ingot
US1484076A (en) * 1920-10-26 1924-02-19 Valley Mould & Iron Corp Inverted horizontal ingot mold and process of casting
US1716833A (en) * 1926-03-06 1929-06-11 Riley Stoker Corp Method of casting
FR833609A (fr) * 1937-06-25 1938-10-26 Cie Des Forges De Chatillon Procédé pour localiser la retassure dans les lingots coulés à plat
GB516533A (en) * 1937-06-25 1940-01-04 Cie Des Forges De Chatillon Co Process for restricting the piping hole in flat cast ingots

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604494A (en) * 1966-10-04 1971-09-14 Metallgesellschaft Ag Process for the production of composite ingots of magnesium containing prealloys
US3483916A (en) * 1968-01-31 1969-12-16 Union Carbide Corp Ferro alloy casting process
US3433283A (en) * 1968-04-03 1969-03-18 Ohio Ferro Alloys Corp Method of reducing friability of ferro-alloys

Also Published As

Publication number Publication date
NO120649B (de) 1970-11-16
FR1509815A (fr) 1968-01-12
DE1299802B (de) 1969-07-24
JPS5138645B1 (de) 1976-10-22

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ELKEM METALS COMPANY, 270 PARK AVENUE, NEW YORK, N

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNION CARBIDE CORPORATION, A NY CORP.;REEL/FRAME:003882/0761

Effective date: 19810626

Owner name: ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNION CARBIDE CORPORATION, A NY CORP.;REEL/FRAME:003882/0761

Effective date: 19810626