WO2008144617A1 - Récupération plus poussée d'alliages dans des bains d'acier en fusion au moyen e fils enrobés dopés avec des désoxydants - Google Patents

Récupération plus poussée d'alliages dans des bains d'acier en fusion au moyen e fils enrobés dopés avec des désoxydants Download PDF

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Publication number
WO2008144617A1
WO2008144617A1 PCT/US2008/064062 US2008064062W WO2008144617A1 WO 2008144617 A1 WO2008144617 A1 WO 2008144617A1 US 2008064062 W US2008064062 W US 2008064062W WO 2008144617 A1 WO2008144617 A1 WO 2008144617A1
Authority
WO
WIPO (PCT)
Prior art keywords
alloy
additive
delivery device
deoxidizing agent
molten
Prior art date
Application number
PCT/US2008/064062
Other languages
English (en)
Inventor
Gregory P. Marzec
Leslie Wade Niemi
Original Assignee
Affival, 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
Priority to US11/938,671 priority Critical patent/US8015168B2/en
Priority to AT0916108A priority patent/AT507365A2/de
Priority to DE112008001288T priority patent/DE112008001288T5/de
Priority to SK50057-2009A priority patent/SK500572009A3/sk
Priority to CA002686285A priority patent/CA2686285A1/fr
Priority to EP08769509A priority patent/EP2158337A4/fr
Application filed by Affival, Inc. filed Critical Affival, Inc.
Priority to JP2010508627A priority patent/JP2010527410A/ja
Priority to MX2009012438A priority patent/MX2009012438A/es
Priority to BRPI0811753-5A2A priority patent/BRPI0811753A2/pt
Priority to RU2009146821/02A priority patent/RU2529132C2/ru
Priority to SE0901523A priority patent/SE0901523L/sv
Priority to CN200880023283A priority patent/CN101688260A/zh
Publication of WO2008144617A1 publication Critical patent/WO2008144617A1/fr
Priority to GBGB0919971.2A priority patent/GB0919971D0/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • 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
    • C21C7/0006—Adding metallic additives
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/04—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbonitrides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium

Definitions

  • the present invention relates generally to adding alloys to molten metal and steel in particular. More particularly, this invention relates to adding alloys and deoxidants to molten steel in order to increase recovery in the metal.
  • Recovery is a measure of the amount of alloys and additives contained in the molten steel after injection. Recovery is expressed as the percent of alloy or additive injected in the steel that is contained in the steel after injection. The greater the percentage contained in the steel after injection, the greater the recovery will be. Greater recoveries mean lower cost to the steel maker because less cored wire is injected. Also, greater recovery usually means the final steel chemistry will be more predictable and repeatable. [0006] It has been well known that additive alloys (typically ground to powders under one millimeter in diameter) encased in a steel jacketed cored wire that is injected deep into molten baths results in a significant improvement in recovery.
  • the oxide layer 19 becomes a barrier to the molten additive alloy core 16.
  • 70% FeTi has a melting temperature of 1085 C
  • TiO 2 has a melting temperature of 1850 C
  • the molten steel 10 temperature is usually about 1600 C. This problem is illustrated in Fig. 3. These mechanisms have the affect of not allowing the additive alloy particle 16 to be fully dissolved in the metal molten 10 before the particle 16 rises to the slag surface where it is absorbed.
  • the purpose of the additive alloy 16 being injected into the molten bath 10 is to form nitrides and/or carbides beneficial to the final product.
  • CaCN 2 Calcium Cyanamid
  • the recovery of nitrogen is found to be greatly improved when the CaCN 2 is added to the molten bath 10 using cored wire injection as described in U.S. Patent No. 4,897,114.
  • the present invention may be embodied as an alloy delivery device.
  • the delivery device may include a blended substance having at least one additive alloy and at least one deoxidizing agent.
  • the blended substance may be covered by an elongated sheath.
  • the sheath may be a substantially hollow wire in which the blended substance resides.
  • the at least one additive alloy may be FeNb, FeV, or FeTi.
  • the at least one deoxidizing agent may be Ca, CaSi, Si, Al, or CaCN 2 .
  • the deoxidizing agent may be a powder typically comprised of particles having a diameter of less than one millimeter.
  • the additive alloy may be ground powder particles typically having a diameter of less than one millimeter.
  • the deoxidizing agent may be present in an amount of typically 5% to 50% of the mixture by weight or volume.
  • the present invention may be embodied as a method for providing an additive alloy to molten metal, wherein at least one deoxidizing agent is blended with at least one additive alloy to provide a blended substance.
  • the blended substance may be encased in a metal sheath to provide an alloy delivery device.
  • Molten metal may be produced and the alloy delivery device may be provided into the molten metal.
  • the delivery device may be fed into the molten metal and the sheath may be allowed to melt in the molten metal. Once melted, the blended substance is allowed to mix with the molten metal and thereby results in dispersing the blended substance into the molten metal.
  • the recovery of the alloying additive in the molten steel is enhanced by blending deoxidizing powders with the additive alloys, such as, but not limited to, Ca, CaSi, Si, Al, CaCN 2 , etc., in varying amounts (typically, but not limited to, 5% to 50% of the mixture by weight or volume).
  • the additive alloys such as, but not limited to, Ca, CaSi, Si, Al, CaCN 2 , etc.
  • the deoxiding powders are released in close proximity to the additive alloy powders.
  • the deoxiding powders react with the dissolved oxygen content of the molten metal creating an oxygen depleted zone in the same area as the additive alloy particles.
  • the zone where the powders are released in the molten bath is both depleted in oxygen and enriched with carbon and nitrogen.
  • the present invention provides an additive- enhanced or alloy-enhanced molten steel with improved recovery.
  • Fig. 1 depicts a prior art method, wherein an oxygen enriched molten bath reacts with an additive alloy, thereby forming an oxide layer over an additive alloy core.
  • Fig. 2 demonstrates that, in the prior art methods an oxide layer will reduce the density, thus increasing the buoyancy of the additive alloy in the molten steel bath.
  • Fig. 3 depicts a high melting temperature oxide layer that acts as a barrier to dissolution of the low melting temperature additive alloy core.
  • Fig. 4 depicts an embodiment of the present invention, wherein CaCN 2 particles reacting with oxygen in the bath cause an oxygen-depleted zone. At the same time carbon and nitrogen are released into the molten bath, causing enrichment in the oxygen-depleted zone.
  • Fig. 5 depicts an embodiment of the present invention in which the deoxidizing agent does not release carbon or nitrogen into the molten bath.
  • Fig. 6 is a flow chart of a method according to the invention.
  • the present invention may be used to provide increased recovery in additive- enhanced or alloy-enhanced molten steel.
  • deoxidizing powders 31 to additive alloy powders 28 in cored wires for the injection into molten baths causes a chemical reaction between the deoxiding powder 31 and the oxygen atoms contained in the molten bath 10. This reaction reduces the oxygen content in the localized zone 34 in which the additive alloy powders 28 are released. This can be seen in Fig. 4 and Fig. 5.
  • the amount by which these additive alloy powders 28 are oxidized is greatly reduced, thereby increasing the recovery of the additive alloy 28.
  • the amount required to be injected into the molten metal 10 is reduced, thus saving time and money for the metal producer. Further, by increasing the recovery, the final chemistry of the molten steel becomes more predictable and repeatable - both being desired process traits.
  • an alloy delivery device may include a blend of an additive alloy such as FeNb, FeV, or FeTi, and a deoxidizing agent of Ca, CaSi, Si, Al, or CaCN 2 .
  • This blend may be housed in an elongated metal sheath.
  • the present invention has recognized the deoxidizing and/or the carborizing and nitriding potential if CaCN 2 is combined with certain oxidizable nitride and/or carbide formers (e.g., FeNb, FeV, FeTi) and is then introduced into the molten bath by cored wire injection.
  • Fig. 4 illustrates that when CaCN 2 particles 31 are blended with nitride and/or carbide forming additive alloys 28 in cored wires, the CaCN 2 particles 31 established a zone 34 around the additive alloy particle 28, wherein the oxygen content is reduced and the carbon and nitrogen contents are enriched.
  • the deoxidizing agent is in the form of a powder with particles that typically have a diameter of less than one millimeter, while the additive alloy is in the form of a ground powder with particles that typically have a diameter of less than one millimeter.
  • the deoxidizing agent is present in an amount typically of 5% to 50% of the mixture by weight or volume.
  • Fig. 6 depicts a method according to the invention.
  • a deoxidizing agent of Ca, CaSi, Si, Al, or CaCN 2 is blended 100 with an additive alloy, which may be FeNb, FeV, or FeTi.
  • the blended material may be encased 103 in a metal sheath in order to provide an alloy delivery device.
  • the alloy delivery device is provided 109 into the molten metal.
  • the sheath is allowed 112 to melt, and the blended substance is disbursed into the molten metal.
  • Fig. 6 depicts such a method.

Landscapes

  • 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)
  • Continuous Casting (AREA)

Abstract

La présente invention permet d'augmenter le taux de récupération dans un acier en fusion renforcé d'un additif ou d'un alliage. A cette fin, on utilise des poudres désoxydantes mélangées à des alliages d'ajout. La poudre désoxydante réagit avec l'oxygène qu'elle appauvrit dans cette région. La région d'alliage ou d'additif s'en trouve enrichie, ce qui améliore la récupération dans l'acier en fusion.
PCT/US2008/064062 2007-05-17 2008-05-19 Récupération plus poussée d'alliages dans des bains d'acier en fusion au moyen e fils enrobés dopés avec des désoxydants WO2008144617A1 (fr)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US11/938,671 US8015168B2 (en) 2007-11-12 2007-11-12 String pooling
MX2009012438A MX2009012438A (es) 2007-05-17 2008-05-19 Recuperacion mejorada de aleaciones en ba?os de acero fundido usando alambres con alma dopados con desoxidantes.
SK50057-2009A SK500572009A3 (sk) 2007-05-17 2008-05-19 Zariadenie na privádzanie legovacích prímesí a spôsob privádzania legovacej prímesi do roztaveného kovu
CA002686285A CA2686285A1 (fr) 2007-05-17 2008-05-19 Recuperation d'alliage amelioree dans des bains d'acier en fusion en utilisant des cables a ame dopes avec des desoxydants
EP08769509A EP2158337A4 (fr) 2007-05-17 2008-05-19 Récupération plus poussée d'alliages dans des bains d'acier en fusion au moyen e fils enrobés dopés avec des désoxydants
AT0916108A AT507365A2 (de) 2007-05-17 2008-05-19 Verbesserte legierungswiedergewinnung in stahlschmelzbädern unter verwendung von mit desoxidationsmitteln dotierten fülldrähten
JP2010508627A JP2010527410A (ja) 2007-05-17 2008-05-19 脱酸素剤を添加したコアードワイヤの使用による溶鋼湯における向上した合金のリカバリー
DE112008001288T DE112008001288T5 (de) 2007-05-17 2008-05-19 Verbesserte Legierungsrückgewinnung in Bädem aus geschmolzenem Stahl unter Verwendung mit Desoxidationsmitteln dotierter Fülldrähte
BRPI0811753-5A2A BRPI0811753A2 (pt) 2007-05-17 2008-05-19 Dispositivo de liberação de liga e método de prover uma liga de adição ao metal em fusão
RU2009146821/02A RU2529132C2 (ru) 2007-05-17 2008-05-19 Обеспечение улучшенного усвоения сплава в ванне расплавленной стали с использованием проволоки с сердечником, содержащим раскислители
SE0901523A SE0901523L (sv) 2007-05-17 2008-05-19 Förbättrad legeringsåtervinning i bad av smält stål med användning av kärnförsedd tråd dopad med desoxidationsmedel
CN200880023283A CN101688260A (zh) 2007-05-17 2008-05-19 利用掺杂脱氧剂的含芯金属丝提高钢水溶池中合金回收
GBGB0919971.2A GB0919971D0 (en) 2007-05-17 2009-11-16 Enhanced alloy recovery in molten steel baths utilizing cored wires doped with deoxidants

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US93867107P 2007-05-17 2007-05-17
US60/938,671 2007-05-17

Publications (1)

Publication Number Publication Date
WO2008144617A1 true WO2008144617A1 (fr) 2008-11-27

Family

ID=40122183

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/064062 WO2008144617A1 (fr) 2007-05-17 2008-05-19 Récupération plus poussée d'alliages dans des bains d'acier en fusion au moyen e fils enrobés dopés avec des désoxydants

Country Status (21)

Country Link
US (1) US20080314199A1 (fr)
EP (1) EP2158337A4 (fr)
JP (1) JP2010527410A (fr)
KR (1) KR20100029078A (fr)
CN (1) CN101688260A (fr)
AT (1) AT507365A2 (fr)
BR (1) BRPI0811753A2 (fr)
CA (1) CA2686285A1 (fr)
CZ (1) CZ2009857A3 (fr)
DE (1) DE112008001288T5 (fr)
ES (1) ES2343302B1 (fr)
FI (1) FI20096347A (fr)
GB (1) GB0919971D0 (fr)
MX (1) MX2009012438A (fr)
PL (1) PL390678A1 (fr)
RU (1) RU2529132C2 (fr)
SE (1) SE0901523L (fr)
SK (1) SK500572009A3 (fr)
TR (1) TR200908693T1 (fr)
WO (1) WO2008144617A1 (fr)
ZA (1) ZA200908515B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010149168A (ja) * 2008-12-26 2010-07-08 Hitachi Cable Ltd 銅合金鋳塊の製造方法、及び活性元素の添加方法
CN114807729A (zh) * 2018-08-01 2022-07-29 浙江大隆合金钢有限公司 一种05Cr17Ni4Cu4Nb钢的生产方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1843861A4 (fr) * 2004-11-22 2010-02-17 Invista North America Sarl Procede servant a faire cristalliser et a polymeriser a l etat solide des polymeres et polymere enduit
CA2649905C (fr) 2006-04-20 2019-04-09 Dentatek Corporation Appareil et procedes pour traiter des canaux radiculaires de dents
US7980854B2 (en) 2006-08-24 2011-07-19 Medical Dental Advanced Technologies Group, L.L.C. Dental and medical treatments and procedures
CA2911415A1 (fr) 2013-06-26 2014-12-31 Sonendo, Inc. Appareil et procedes de plombage dentaire et de devitalisation
US10513753B1 (en) 2019-01-03 2019-12-24 2498890 Ontario Inc. Systems, methods, and cored wires for treating a molten metal
USD997355S1 (en) 2020-10-07 2023-08-29 Sonendo, Inc. Dental treatment instrument

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021637A (en) * 1974-09-06 1977-05-03 La Soudure Electrique Autogene, Procedes Arcos Flux-cored wires for electrogas welding
US4663244A (en) * 1983-09-09 1987-05-05 Messer Griesheim Gmbh Filler containing easily oxidizable elements
US5376160A (en) * 1992-10-30 1994-12-27 Skw Trostberg Aktiengesellschaft Agent for the treatment of metal melts

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917930B1 (fr) 1962-08-24 1974-05-07
US3829312A (en) * 1972-01-04 1974-08-13 Nat Res Inst Metals Process for the manufacture of steel of good machinability
US3915693A (en) * 1972-06-21 1975-10-28 Robert T C Rasmussen Process, structure and composition relating to master alloys in wire or rod form
GB1554104A (en) * 1975-07-23 1979-10-17 British Steel Corp Refining liquid metal
GB1504250A (en) 1975-12-05 1978-03-15 Hoesch Werke Ag Addition of wire to a metal melt
FR2476542B1 (fr) * 1980-02-26 1983-03-11 Vallourec
US4483710A (en) * 1981-03-31 1984-11-20 Union Carbide Corporation Addition agent for adding vanadium to iron base alloys
FR2612945B1 (fr) * 1987-03-24 1993-08-13 Affival Procede d'elaboration des metaux ferreux contenant du plomb et fil fourre pour mise en oeuvre du procede
DE3739154A1 (de) * 1987-11-19 1989-06-01 Sueddeutsche Kalkstickstoff Bleihaltiges zusatzmittel fuer stahlschmelzen
DE3739156A1 (de) * 1987-11-19 1989-06-01 Sueddeutsche Kalkstickstoff Stickstoffhaltiges zusatzmittel fuer stahlschmelzen
DE3924558C1 (fr) * 1989-07-25 1990-11-22 Skw Trostberg Ag, 8223 Trostberg, De
DE4138231C1 (fr) * 1991-11-21 1992-10-22 Skw Trostberg Ag, 8223 Trostberg, De
RU2000335C1 (ru) * 1992-01-08 1993-09-07 Владимир Андреевич Паршин Способ обработки жидкой стали
RU2061762C1 (ru) * 1993-02-18 1996-06-10 Институт новой металлургической технологии Способ обработки стали в ковше
ES2195768B1 (es) * 2002-02-13 2005-03-01 Juan Asensio Lozano Procedimiento de fabricacion de un acero austenitico al manganeso microaleado y acero asi obtenido.
GB2422618A (en) * 2005-01-28 2006-08-02 Injection Alloys Ltd Molten metal refining wire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021637A (en) * 1974-09-06 1977-05-03 La Soudure Electrique Autogene, Procedes Arcos Flux-cored wires for electrogas welding
US4663244A (en) * 1983-09-09 1987-05-05 Messer Griesheim Gmbh Filler containing easily oxidizable elements
US5376160A (en) * 1992-10-30 1994-12-27 Skw Trostberg Aktiengesellschaft Agent for the treatment of metal melts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2158337A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010149168A (ja) * 2008-12-26 2010-07-08 Hitachi Cable Ltd 銅合金鋳塊の製造方法、及び活性元素の添加方法
CN114807729A (zh) * 2018-08-01 2022-07-29 浙江大隆合金钢有限公司 一种05Cr17Ni4Cu4Nb钢的生产方法

Also Published As

Publication number Publication date
GB2461239A (en) 2009-12-30
ES2343302B1 (es) 2011-06-17
GB0919971D0 (en) 2009-12-30
SE0901523A0 (sv) 2010-02-12
AT507365A2 (de) 2010-04-15
TR200908693T1 (tr) 2010-04-21
CZ2009857A3 (cs) 2010-03-03
CA2686285A1 (fr) 2008-11-27
RU2009146821A (ru) 2011-06-27
EP2158337A4 (fr) 2010-11-03
SE0901523L (sv) 2010-02-12
RU2529132C2 (ru) 2014-09-27
SK500572009A3 (sk) 2010-03-08
CN101688260A (zh) 2010-03-31
ZA200908515B (en) 2010-08-25
MX2009012438A (es) 2010-04-27
JP2010527410A (ja) 2010-08-12
DE112008001288T5 (de) 2010-07-15
EP2158337A1 (fr) 2010-03-03
BRPI0811753A2 (pt) 2014-11-11
KR20100029078A (ko) 2010-03-15
PL390678A1 (pl) 2010-10-25
ES2343302A1 (es) 2010-07-27
US20080314199A1 (en) 2008-12-25
FI20096347A (fi) 2009-12-18

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