US3924036A - Method of continuous casting - Google Patents

Method of continuous casting Download PDF

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Publication number
US3924036A
US3924036A US374760A US37476073A US3924036A US 3924036 A US3924036 A US 3924036A US 374760 A US374760 A US 374760A US 37476073 A US37476073 A US 37476073A US 3924036 A US3924036 A US 3924036A
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US
United States
Prior art keywords
core member
copper
molten metal
metal
crucible
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
US374760A
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English (en)
Inventor
Marcel V Carrara
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US374760A priority Critical patent/US3924036A/en
Priority to DE2424230A priority patent/DE2424230C2/de
Priority to ZA00743434A priority patent/ZA743434B/xx
Priority to GB2468774A priority patent/GB1471693A/en
Priority to AU69806/74A priority patent/AU483107B2/en
Priority to AT466974A priority patent/AT338983B/de
Priority to PH15936A priority patent/PH11802A/en
Priority to CA203,236A priority patent/CA1028820A/en
Priority to JP7289974A priority patent/JPS5417297B2/ja
Priority to NL7408658A priority patent/NL7408658A/xx
Priority to CH884474A priority patent/CH580452A5/xx
Priority to ES427738A priority patent/ES427738A1/es
Priority to BR5381/74A priority patent/BR7405381D0/pt
Priority to SE7408526A priority patent/SE7408526L/
Priority to CH768276A priority patent/CH600967A5/xx
Priority to IT24513/74A priority patent/IT1015475B/it
Priority to MX289074U priority patent/MX4510E/es
Priority to FR7422583A priority patent/FR2234943B1/fr
Priority to ES434437A priority patent/ES434437A1/es
Priority to US05/612,096 priority patent/US3995587A/en
Application granted granted Critical
Publication of US3924036A publication Critical patent/US3924036A/en
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
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/12—Appurtenances, e.g. for sintering, for preventing splashing
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/38—Wires; Tubes

Definitions

  • the apparatus includes a crucible or refractory container for molten metal which is provided with an entry port or orifice for the introduction and passage of a core member into the crucible or container and through the molten metal contained therein.
  • a bushing member of refractory metal is inserted in the entry port or orifice to provide a relatively wear resistant seal about the moving core member.
  • This invention comprises an improvement in the apparatus and method for carrying out a continuous metal casting or dip forming process comprising passing a core member upwardly through a crucible containing molten metal, which substantially eliminates the occurrence of entrained particles or bodies of foreign metal or material, so-called inclusions, within the cast products.
  • the improvement of this invention includes provid ing a bushing member insert for the crucible entry port composed of molybdenum alloyed with minor amounts of both titanium and zirconium, and passing the core member through the bushing into the crucible.
  • a primary object of this invention is to provide an apparatus for continuously casting metal which effectively overcomes the entrainment of particles of foreign metals or other materials within the cast product, and thereby produces a cast product free of degrading contaminants.
  • Another object of this invention is to extend production runs in continuous casting operations, and reduce downtime for replacement of parts by providing apparatus including a bushing insert which resists deterioration and loss of structural integrity.
  • a further object of this invention is to provide for the production of relatively pure continuously cast products. which are more amenable to metal working or shaping procedures, and apparatus therefor.
  • An additional object of this invention is to provide an improved method of continuously casting metal which produces a cast product free of foreign inclusions.
  • FIG. 1 is a cross-sectional view of a novel apparatus constructed in accordance with one embodiment of this invention, with the core member and cast product shown in elevation; and,
  • FIG. 2 is an enlarged fragmentary view of a portion of the apparatus shown in FIG. 1 with the core member and the cast product shown in elevation.
  • a metal core member 10 such as a rod of copper, is continuously passed upwardly through the apparatus of a continuous casting system 12.
  • the core member can be moved through the apparatus by appropriate drive means such as feed rolls l4 and 14, and take up rolls 16 and 16'.
  • Core member 10 is preferably first passed through an annular cutting die 18 which continuously shaves off a portion of the outer surface area of the core member to eliminate surface oxides or contaminants and to provide a clean metal face for the adherence of the molten metal.
  • Other means such as an acid pickling bath, can serve to effectively clean the surface of the core member.
  • the annular cutting die 18 is a preferred means because among other reasons, it also performs a scaling function at the system entrance.
  • the shaved and cleaned core member 10 Passing from the cutting die 18, the shaved and cleaned core member 10 enters a vestibule chamber 20, which is preferably evacuated, such as through pipe 22, to minimize exposure of the shaved core member to oxygen and other air borne contaminants.
  • Crucible 24 comprising a suitable refractory vessel for the containment of molten metal 26, such as copper, is preferably enclosed to protect is contents from the atmosphere.
  • Crucible 24 is provided with an entry port or orifice 28 located in its bottom wall 30 below the surface ot its molten metal contents for passage therethrough of the core member upwardly into the crucible chamber interior, and through its contents of molten metal 26.
  • a bushing member or insert 32 formed of a refractory material is provided within entry port 28 of crucible 24, and in accordance with one preferred embodiment of the invention, the bushing member extends from the vestibule chamber to the crucible 24 substantially as shown in the drawing.
  • bushing member or insert 32 provided for the passage therethrough of the core member into the crucible, is composed of, or formed from, molybdenum metal alloyed with minor amounts of both titanium and zirconium, for example at least about 99 percent by weight of molybdenum with about 0.25 to 1.0 percent by weight of titanium and about 0.04 to 0.2 percent by weight of zirconium.
  • the bushing member 32 is composed of an alloy consisting essentially of about 0.48 percent by weight of titanium and about 0.9 percent by weight of zirconium, and the balance molybdenum.
  • bushings or inlet port inserts composed of the aforesaid molybdenum alloys effectively eliminate the occurrence of inclusions or presence of particles of foreign metal or other material within the cast products derived therefrom.
  • the bushing member formed of these alloys have been found to provide exceptionally longer periods of service life of up to several times greater than prior bushings composed of other refractory materials such as sintered molybdenum.
  • the relatively cold core member 10 On passing through the bath of molten metal 26 with the apparatus of this invention, the relatively cold core member 10 progressively accretes over its surface an accumulation of solidifying melt. The core member then passes out of the crucible 24 up through an exit port 34 or orifice in the top wall 36 of the crucible 24. Upon exiting from the crucible chamber, the cast product moves through a water spray 38, or other suitable cooling means to reduce the temperature of the cast product.
  • Molybdenum alloys of the type which are suitable for use in forming the bushing members or inserts of this invention for use in dip forming apparatus and produc- 4 tion are reported in Alloy Digest, August 1964, Published by Engineering Alloy Digest Inc., Upper Montclair, NJ.
  • the compositions of commercial sources of the alloys are given therein as follows:
  • the apparatus and method of this invention are useful in the casting of other metals.
  • the invention can be used in the casting of substantially any metal or alloy upon a core member composed of the same metal or alloy as the melt, or a different metal or alloy, and may include plating or encasing operations.
  • the molybdenum alloy insert of this invention also eliminates some of the causes of the formation of bells which comprise intermittent oveer-accretions or attachments of excessive and irregular accumulations of molten metal on the moving core member.
  • the molybdenum alloy insert provides much greater resistance to wetting by the molten copper and in turn adherence and build up of cooled melt adjacent to the core rod passing through the insert.
  • the alloys freedom from high oxide contents eliminates a source of chilling the copper melt in the area about the core rod.
  • a method of continuously casting copper comprising the steps of: passing a metal core member comprising copperupwardly into and through a crucible containing molten metal comprising copper, said core member entering the crucible containing molten metal comprising copper through a bushing member consist ing essentially of a molybdenum alloy of at least about 99 percent by weight of molybdenum and about 0.25 to about 1.0 percent by weight of titanium and about 0.04 to about 0.2 percent by weight of zirconium, and thereby accreting and solidifying molten metal comprising copper on the core member, and removing the metal core member with the accreted and solidified molten metal comprising copper thereon from the crucible and cooling it.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)
  • Conductive Materials (AREA)
US374760A 1973-06-28 1973-06-28 Method of continuous casting Expired - Lifetime US3924036A (en)

Priority Applications (20)

Application Number Priority Date Filing Date Title
US374760A US3924036A (en) 1973-06-28 1973-06-28 Method of continuous casting
DE2424230A DE2424230C2 (de) 1973-06-28 1974-05-18 Verwendung einer Molybdänlegierung für die Durchführungsbuchse einer Vorrichtung zum Strangangießen von Kupfer
ZA00743434A ZA743434B (en) 1973-06-28 1974-05-28 Continuous casting apparatus and a method of casting
GB2468774A GB1471693A (en) 1973-06-28 1974-06-04 Continuous casting apparatus and method of casting
AU69806/74A AU483107B2 (en) 1973-06-28 1974-06-05 Continuous casting apparatus, anda method of casting
AT466974A AT338983B (de) 1973-06-28 1974-06-06 Vorrichtung zum kontinuierlichen umgiessen eines metallstranges
PH15936A PH11802A (en) 1973-06-28 1974-06-13 Method of continuous castings
CA203,236A CA1028820A (en) 1973-06-28 1974-06-24 Continuous casting apparatus, and a method of casting
ES427738A ES427738A1 (es) 1973-06-28 1974-06-27 Aparato para la colada continua de metales.
CH884474A CH580452A5 (Sortimente) 1973-06-28 1974-06-27
JP7289974A JPS5417297B2 (Sortimente) 1973-06-28 1974-06-27
BR5381/74A BR7405381D0 (pt) 1973-06-28 1974-06-27 Aparelho e processo para fundicao continua de metais
SE7408526A SE7408526L (Sortimente) 1973-06-28 1974-06-27
CH768276A CH600967A5 (Sortimente) 1973-06-28 1974-06-27
NL7408658A NL7408658A (Sortimente) 1973-06-28 1974-06-27
IT24513/74A IT1015475B (it) 1973-06-28 1974-06-28 Apparato di fusione continua e metodo di fusione
MX289074U MX4510E (es) 1973-06-28 1974-06-28 Mejoras en un metodo para vaciar continuamente metales o aleaciones
FR7422583A FR2234943B1 (Sortimente) 1973-06-28 1974-06-28
ES434437A ES434437A1 (es) 1973-06-28 1975-02-04 Un metodo de colar continuamente cobre.
US05/612,096 US3995587A (en) 1973-06-28 1975-09-10 Continuous casting apparatus including Mo-Ti-Zr alloy bushing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US374760A US3924036A (en) 1973-06-28 1973-06-28 Method of continuous casting

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/612,096 Division US3995587A (en) 1973-06-28 1975-09-10 Continuous casting apparatus including Mo-Ti-Zr alloy bushing

Publications (1)

Publication Number Publication Date
US3924036A true US3924036A (en) 1975-12-02

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ID=23478104

Family Applications (1)

Application Number Title Priority Date Filing Date
US374760A Expired - Lifetime US3924036A (en) 1973-06-28 1973-06-28 Method of continuous casting

Country Status (15)

Country Link
US (1) US3924036A (Sortimente)
JP (1) JPS5417297B2 (Sortimente)
AT (1) AT338983B (Sortimente)
BR (1) BR7405381D0 (Sortimente)
CA (1) CA1028820A (Sortimente)
CH (2) CH600967A5 (Sortimente)
DE (1) DE2424230C2 (Sortimente)
ES (2) ES427738A1 (Sortimente)
FR (1) FR2234943B1 (Sortimente)
GB (1) GB1471693A (Sortimente)
IT (1) IT1015475B (Sortimente)
NL (1) NL7408658A (Sortimente)
PH (1) PH11802A (Sortimente)
SE (1) SE7408526L (Sortimente)
ZA (1) ZA743434B (Sortimente)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733716A (en) * 1984-05-30 1988-03-29 Fujikura Ltd. Bushing in continuous casting dip forming apparatus
US6736187B2 (en) * 2000-08-31 2004-05-18 Yazaki Corporation Molten metal infiltrating method and molten metal infiltrating apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118230A (en) * 1977-03-26 1978-10-16 Shinko Wire Co Ltd Preparation of metal covered wire
JPS612446U (ja) * 1984-06-11 1986-01-09 株式会社フジクラ 浸漬被覆形成装置用ブシユ部材
DE19509681C1 (de) * 1995-03-07 1996-05-02 Mannesmann Ag Verfahren und Anlage zur kontinuierlichen Erzeugung bandförmiger Bleche

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269825A (en) * 1963-06-18 1966-08-30 Crucible Steel Co America Method of producing homogeneous alloys containing refractory metals
US3424130A (en) * 1967-03-06 1969-01-28 Gen Electric Entry port member for dip crucible apparatus
US3610204A (en) * 1970-04-06 1971-10-05 Kennecott Copper Corp Apparatus for accreting molten copper on a moving core member
US3709722A (en) * 1970-04-06 1973-01-09 Kennecott Copper Corp Process for accreting molten copper on a moving core member

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1157743B (de) * 1955-08-24 1963-11-21 Gen Electric Verfahren zur kontinuierlichen Herstellung von Halbzeug
US3770392A (en) * 1971-05-10 1973-11-06 Gen Electric Molybdenum-base alloys
JPS4826631A (Sortimente) * 1971-08-10 1973-04-07

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269825A (en) * 1963-06-18 1966-08-30 Crucible Steel Co America Method of producing homogeneous alloys containing refractory metals
US3424130A (en) * 1967-03-06 1969-01-28 Gen Electric Entry port member for dip crucible apparatus
US3610204A (en) * 1970-04-06 1971-10-05 Kennecott Copper Corp Apparatus for accreting molten copper on a moving core member
US3709722A (en) * 1970-04-06 1973-01-09 Kennecott Copper Corp Process for accreting molten copper on a moving core member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733716A (en) * 1984-05-30 1988-03-29 Fujikura Ltd. Bushing in continuous casting dip forming apparatus
US6736187B2 (en) * 2000-08-31 2004-05-18 Yazaki Corporation Molten metal infiltrating method and molten metal infiltrating apparatus

Also Published As

Publication number Publication date
NL7408658A (Sortimente) 1974-12-31
CA1028820A (en) 1978-04-04
JPS5417297B2 (Sortimente) 1979-06-28
CH600967A5 (Sortimente) 1978-06-30
ES434437A1 (es) 1976-12-16
GB1471693A (en) 1977-04-27
JPS5070236A (Sortimente) 1975-06-11
DE2424230A1 (de) 1975-01-16
AU6980674A (en) 1975-12-11
SE7408526L (Sortimente) 1974-12-30
CH580452A5 (Sortimente) 1976-10-15
IT1015475B (it) 1977-05-10
FR2234943B1 (Sortimente) 1980-08-01
ATA466974A (de) 1977-01-15
ES427738A1 (es) 1976-08-01
PH11802A (en) 1978-07-05
DE2424230C2 (de) 1983-10-13
ZA743434B (en) 1975-05-28
BR7405381D0 (pt) 1975-01-07
AT338983B (de) 1977-09-26
FR2234943A1 (Sortimente) 1975-01-24

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AS Assignment

Owner name: SHOWA ELECTRIC WIRE & CABLE CO., LTD., A CORP. OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GENERAL ELECTRIC COMPANY, A CORP. OF NEW YORK;REEL/FRAME:005073/0203

Effective date: 19890418