US3910341A - Methods of adding reactive metals to form a remelting electrode - Google Patents

Methods of adding reactive metals to form a remelting electrode Download PDF

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Publication number
US3910341A
US3910341A US482062A US48206274A US3910341A US 3910341 A US3910341 A US 3910341A US 482062 A US482062 A US 482062A US 48206274 A US48206274 A US 48206274A US 3910341 A US3910341 A US 3910341A
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US
United States
Prior art keywords
reactive metal
metal
mold
reactive
remelting
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
US482062A
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English (en)
Inventor
Robert B Herchenroeder
Howard Joseph Klein
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.)
Cabot Corp
Original Assignee
Cabot 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 Cabot Corp filed Critical Cabot Corp
Priority to US482062A priority Critical patent/US3910341A/en
Priority to CA229,837A priority patent/CA1058378A/en
Priority to DE19752527953 priority patent/DE2527953A1/de
Priority to FR7519609A priority patent/FR2276124A1/fr
Priority to SE7507258A priority patent/SE412711B/xx
Priority to GB26667/75A priority patent/GB1519783A/en
Priority to JP50078584A priority patent/JPS5148723A/ja
Priority to IT68621/75A priority patent/IT1036360B/it
Application granted granted Critical
Publication of US3910341A publication Critical patent/US3910341A/en
Priority to US05/636,196 priority patent/USRE29035E/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/20Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00Casting ingots, e.g. from ferrous metals
    • B22D7/12Appurtenances, e.g. for sintering, for preventing splashing

Definitions

  • ABSTRACT A method for adding reactive metals to a molten metal bath by forming said reactive metal into an elongated member, suspending said member generally lengthwise vertically of a mold and pouring metal to be treated into said mold, to make said formed member an integral part of the molten metal as it rises in the mold and is cooled.
  • This invention relates to methods of adding reactive metals to molten baths and particularly to a method of adding reactive metals to a molten metal ingot or casting such as an electrode for electroslag remelting (ESR), vacuum arc remelting, plasma arc remelting, electron beam remelting or similar remelting techniques.
  • ESR electroslag remelting
  • vacuum arc remelting plasma arc remelting
  • electron beam remelting or similar remelting techniques.
  • the reactive metal in the cast electrode may be desirable to encapsulate the reactive metal in the cast electrode as an integral but distinct core so that it is released during subsequent remelting of the electrode rather than during casting of the electrode as just described.
  • a tube or member e.g. of thick walled construction, such that the member is not distributed into the molten metal but is encapsulated as the metal cools as an elongated core and is then subsequently melted during the remelting operation.
  • an inert gas such as argon.
  • FIG. 1 is a vertical section through an apparatus for practicing this invention.
  • FIG. 2 is a section on the line IIII of FIG. 1.
  • an ESR electrode mold on a stool 11 both of conventional form.
  • a tube 12 filled with LaSi 13 (or other reactive metal or alloy) is suspended by a chain 14 from the bottom of a tundish 15 into which molten metal is poured and delivered through nozzle 16 into mold 10.
  • the mold 10 is purged with inert gas. As the molten metal 17 rises in mold 10, the tube 12 is melted off and the reactive metal is dissolved into the metal.
  • the axial member need not be a tube filled with reactive metal but may be an elongated formed member of the reactive metal in a compatible matrix.
  • the tube 12 may be restricted along its length so as to compartment the reactive metal and prevent its flowing out of the end when the end is melted off as pouring beings. This restriction may be accomplished by pinching, crimping or otherwise constricting or compartmenting the tube at spaced intervals along its length. This restriction will also provide, in effect, successive metered charges of reactive metal as the molten metal to be treated rises in the mold.
  • Inherent in this invention are a number of advantages not available in present methods. These are: (A) the lanthanum or other reactive metal addition is distributed uniformly from top to bottom of the cast electrode, (B) there is no loss of the reactive metal by reaction with refractories such as those found in ladles, furnaces, or tundishes because the molds are not lined with ceramic and solidification at the mold metal interface is almost instantaneous, (C) because slag is not present, with the reactive metal, there is no loss of the addition via slag-addition interaction, (D) reaction of the reactive metal with air is minimal because the addition melts after it is submerged in molten alloy and because the mold represents a near closed system from which air can be purged by argon or other inert gas, (E) because losses due to reactions with air and refractory is minimal the amount of undesirable oxide inclusions in the electrode are minimal, (F) because reactive metal recovery is high, less of it need be added and therefore costs are reduced especially when the more expensive elements
  • yttrium is yttrium or an alloy of yttrium.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US482062A 1974-06-24 1974-06-24 Methods of adding reactive metals to form a remelting electrode Expired - Lifetime US3910341A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US482062A US3910341A (en) 1974-06-24 1974-06-24 Methods of adding reactive metals to form a remelting electrode
CA229,837A CA1058378A (en) 1974-06-24 1975-06-20 Methods of adding reactive metals
FR7519609A FR2276124A1 (fr) 1974-06-24 1975-06-23 Procede d'addition de metaux reactifs
DE19752527953 DE2527953A1 (de) 1974-06-24 1975-06-23 Verfahren zum zusetzen reaktiver metalle zu einem gusstueck aus geschmolzenem metall
SE7507258A SE412711B (sv) 1974-06-24 1975-06-24 Sett att forma en omsmeltningselektrod innehallande reaktiva metaller
GB26667/75A GB1519783A (en) 1974-06-24 1975-06-24 Methods of adding selected metals to a molten metal casting
JP50078584A JPS5148723A (enrdf_load_html_response) 1974-06-24 1975-06-24
IT68621/75A IT1036360B (it) 1974-06-24 1975-06-24 Procedimento per la aggiunta di metalli reattivi ad un bagno di metallo fuso
US05/636,196 USRE29035E (en) 1974-06-24 1975-11-28 Methods of adding reactive metals to form a remelting electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US482062A US3910341A (en) 1974-06-24 1974-06-24 Methods of adding reactive metals to form a remelting electrode

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/636,196 Reissue USRE29035E (en) 1974-06-24 1975-11-28 Methods of adding reactive metals to form a remelting electrode

Publications (1)

Publication Number Publication Date
US3910341A true US3910341A (en) 1975-10-07

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ID=23914493

Family Applications (1)

Application Number Title Priority Date Filing Date
US482062A Expired - Lifetime US3910341A (en) 1974-06-24 1974-06-24 Methods of adding reactive metals to form a remelting electrode

Country Status (8)

Country Link
US (1) US3910341A (enrdf_load_html_response)
JP (1) JPS5148723A (enrdf_load_html_response)
CA (1) CA1058378A (enrdf_load_html_response)
DE (1) DE2527953A1 (enrdf_load_html_response)
FR (1) FR2276124A1 (enrdf_load_html_response)
GB (1) GB1519783A (enrdf_load_html_response)
IT (1) IT1036360B (enrdf_load_html_response)
SE (1) SE412711B (enrdf_load_html_response)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5130535A (en) * 1974-09-09 1976-03-15 Sumitomo Metal Ind Gan y konoseizoho
JPS54141334A (en) * 1978-04-26 1979-11-02 Kawasaki Steel Co Metal addition into molten metal in cast mold

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1166167A (en) * 1912-04-13 1915-12-28 Leonard G Woods Forming castings.
US1180248A (en) * 1914-04-07 1916-04-18 Otto H De Lapotterie Process of producing compound metal bodies.
US1703417A (en) * 1929-02-26 oxi hamilton

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4532100Y1 (enrdf_load_html_response) * 1967-08-09 1970-12-09
BE795689A (fr) * 1972-03-06 1973-06-18 Mitsubishi Heavy Ind Ltd Fabrication d'articles metalliques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1703417A (en) * 1929-02-26 oxi hamilton
US1166167A (en) * 1912-04-13 1915-12-28 Leonard G Woods Forming castings.
US1180248A (en) * 1914-04-07 1916-04-18 Otto H De Lapotterie Process of producing compound metal bodies.

Also Published As

Publication number Publication date
JPS5148723A (enrdf_load_html_response) 1976-04-27
IT1036360B (it) 1979-10-30
SE412711B (sv) 1980-03-17
FR2276124A1 (fr) 1976-01-23
DE2527953A1 (de) 1976-01-15
CA1058378A (en) 1979-07-17
SE7507258L (sv) 1975-12-29
GB1519783A (en) 1978-08-02
FR2276124B1 (enrdf_load_html_response) 1981-09-18

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