US3305354A - Method of producing low oxygen oriented silicon-iron - Google Patents

Method of producing low oxygen oriented silicon-iron Download PDF

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Publication number
US3305354A
US3305354A US419023A US41902364A US3305354A US 3305354 A US3305354 A US 3305354A US 419023 A US419023 A US 419023A US 41902364 A US41902364 A US 41902364A US 3305354 A US3305354 A US 3305354A
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US
United States
Prior art keywords
silicon
ferrous metal
ladle
vessel
iron
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
US419023A
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English (en)
Inventor
Robert E Boni
Joseph E Heck
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.)
Armco Inc
Original Assignee
Armco Inc
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 Armco Inc filed Critical Armco Inc
Priority to US419023A priority Critical patent/US3305354A/en
Priority to GB52518/65A priority patent/GB1115552A/en
Priority to FR42371A priority patent/FR1459645A/fr
Priority to ES0320750A priority patent/ES320750A1/es
Priority to CH1741865A priority patent/CH475360A/de
Priority to DE1458810A priority patent/DE1458810C3/de
Priority to SE16398/65A priority patent/SE318114B/xx
Application granted granted Critical
Publication of US3305354A publication Critical patent/US3305354A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing

Definitions

  • silicon-iron material which is intended for the manufacture of sheet stock having the so-called cube-on-face texture or orientation in which two cube faces or (100) planes are parallel to the sheet surface, should not have at the outset an oxygen content of more than about .0040%.
  • Siliconiron sheet stocks having the so-called cube-on-edge orien tation have improved magnetic properties when made from materials of initially very low oxygen content. Also, although the oxygen may be removed from the solid material during an annealing treatment, this prior technique requires higher temperatures and longer times at temperature.
  • Silicon-iron is defined for purposes of this invention as being an alloy containing from about 2.5% to about 3.5% of silicon, enough manganese for workability, minor amounts of such elements as carbon, sulfur and phosphorus, the balance being iron with only such impurities as are incident to the mode of manufacture. It has hitherto been suggested that the alloying with the principal alloying elements, silicon and manganese, be accomplished after the metal has been tapped from the furnace in which it was made.
  • first vessel may be the furnace.
  • the silicon can be added in the form of ferrosilicon
  • the manganese can be added in the form of .silico-manganese, ferro-manganese, or electrolytic manganese.
  • adding is used in the broad sense since the alloying elements may be mixed with the molten metal in the furnace, in the tap runner before the metal gets to the first ladle, or placed in the first ladle with the molten metal deposited on top of them. Also, the alloying elements may be fed into the first ladle concurrently with the introduction of the molten metal. The procedure is in any event rapid, and the partially treated metal will not stand longer than two or three minutes after alloying and before transference to the second ladle.
  • the new procedure taught herein contemplates the addition of a very much larger part of the ferrosilicon to the first ladle, together with electrolytic manganese to attain the same final manganese content.
  • Other forms of manganese-bearing material may be used if desired.
  • the remainder of the silicon-bearing material is added together with somewhat less aluminum than was formerly used.
  • the relatively simple change in procedure results in a marked difference in oxygen level in is preferably -very low in residual aluminum (less than 0.25%). If the aluminum content of the ferrosilicon is greater than 0.25%, the amount of aluminum added as shot or bar to the second ladle may be reduced proportionally below 60 lbs. for a 150 ton heat.
  • the process of this invention can be It is also preferable to make the additions to the stream depended upon to produce a silicon-iron containing about of molten metal as it flows between the vessels to obtain .0040% or less oxygen. better mixing.
  • the aluminum may be added separately
  • the contrast between the two procedures is graphically or at the same time as the ferrosilicon, the latter being shown in the following chart: the preferred practice.
  • the 01d Procedure New Procedure oxygen content at tap may vary considerably depending upon the refining practice used.
  • the amount of ferrosilicon added to the 100 lbs. 65% ferrosilicon 2501,250lbs. 05% ferrosilicon first l dl can b dj ted within the range of 1 to 8 for cubeoncdge stock. 7504,2501- 65% [emsmcon 10 lbs. per ton of charge to match the tap oxygen. When for cube-on-face stock.
  • Second Ladle Second Ladle: Second Ladle: Second Ladle:
  • the core loss values are not given because the While 51% hold(i1nghti1e after the addition of thle alloyipg inlgredientg heats were rolled t0 various final gauges. However, the 1s require eyon e ilne necessary to transfer t 10 meta to t 1e secon ladle, more consistent results are attained with the brief holding times core 10S ses were to be 9 than those Obtamed by indicated. conventlonal deoxldizmg practices.
  • the process of this invention operates to give asmuch as that formerly used.
  • a method of producing low oxygen silicon-iron intended for the manufacture of oriented silicon-iron sheet stock comprising the steps of adding to molten ferrous metal in a first vessel a quantity of silicon-bearing material sufficient to combine with oxygen in the ferrous metal and to leave a substantial residual quantity of silicon in alloyed condition in the ferrous metal, addin a quantity of manganesebearing material to said first vessel SLlfilClCIliI to bring the manganese content of said ferrous metal up to a desired final level, transferring said ferrous metal to a second vessel, adding a quantity of said silicon-bearing material sufiicient to bring the silicon content of said ferrous metal to a desired final alloy level, adding aluminum to said ferrous metal, and holding said ferrous metal in said second vessel for a holding period sufiicient to allow inclusions to float out of said ferrous metal.
  • ferrous I metal charge is subsequently made into 'a sheet product having a cube-on-edge orientation and wherein the siliconbearing material added to the first vessel is ferrosilicon added in a quantity equivalent to at least 1 /3 pounds of 65% ferrosilicon per ton of said metal charge.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
US419023A 1964-12-17 1964-12-17 Method of producing low oxygen oriented silicon-iron Expired - Lifetime US3305354A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US419023A US3305354A (en) 1964-12-17 1964-12-17 Method of producing low oxygen oriented silicon-iron
GB52518/65A GB1115552A (en) 1964-12-17 1965-12-10 Method of producing low oxygen silicon-iron
FR42371A FR1459645A (fr) 1964-12-17 1965-12-15 Production d'un alliage de fer-silicium destiné à la fabrication d'un matériau sous forme de feuilles
ES0320750A ES320750A1 (es) 1964-12-17 1965-12-15 Procedimiento para la produccion de hierro al silicio con un contenido bajo de oxigeno.
CH1741865A CH475360A (de) 1964-12-17 1965-12-16 Verfahren zur Herstellung von Siliciumeisen mit geringem Sauerstoffgehalt
DE1458810A DE1458810C3 (de) 1964-12-17 1965-12-16 Verfahren zur Herstellung einer Eisen-Silicium-Legierung mit einem Sauerstoffgehalt von etwa 0,0025 %
SE16398/65A SE318114B (de) 1964-12-17 1965-12-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US419023A US3305354A (en) 1964-12-17 1964-12-17 Method of producing low oxygen oriented silicon-iron

Publications (1)

Publication Number Publication Date
US3305354A true US3305354A (en) 1967-02-21

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ID=23660467

Family Applications (1)

Application Number Title Priority Date Filing Date
US419023A Expired - Lifetime US3305354A (en) 1964-12-17 1964-12-17 Method of producing low oxygen oriented silicon-iron

Country Status (7)

Country Link
US (1) US3305354A (de)
CH (1) CH475360A (de)
DE (1) DE1458810C3 (de)
ES (1) ES320750A1 (de)
FR (1) FR1459645A (de)
GB (1) GB1115552A (de)
SE (1) SE318114B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960616A (en) * 1975-06-19 1976-06-01 Armco Steel Corporation Rare earth metal treated cold rolled, non-oriented silicon steel and method of making it
EP0002929A1 (de) * 1977-12-22 1979-07-11 Uss Engineers And Consultants, Inc. Verwendung von niedriggekohlten Stahlen für elektrische Anwendungen
FR2414560A1 (fr) * 1978-01-13 1979-08-10 Metal Research Corp Ferrosilicium de haute purete pour ameliorer les qualites de l'acier et de la fonte

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695318A (en) * 1986-10-14 1987-09-22 Allegheny Ludlum Corporation Method of making steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960616A (en) * 1975-06-19 1976-06-01 Armco Steel Corporation Rare earth metal treated cold rolled, non-oriented silicon steel and method of making it
EP0002929A1 (de) * 1977-12-22 1979-07-11 Uss Engineers And Consultants, Inc. Verwendung von niedriggekohlten Stahlen für elektrische Anwendungen
FR2414560A1 (fr) * 1978-01-13 1979-08-10 Metal Research Corp Ferrosilicium de haute purete pour ameliorer les qualites de l'acier et de la fonte

Also Published As

Publication number Publication date
DE1458810A1 (de) 1969-01-16
SE318114B (de) 1969-12-01
CH475360A (de) 1969-07-15
FR1459645A (fr) 1966-11-18
DE1458810B2 (de) 1974-08-01
DE1458810C3 (de) 1975-03-20
GB1115552A (en) 1968-05-29
ES320750A1 (es) 1966-09-01

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