EP1858662A1 - Procede pour couler en continu un metal a resistance mecanique amelioree et produit obtenu par le procede - Google Patents
Procede pour couler en continu un metal a resistance mecanique amelioree et produit obtenu par le procedeInfo
- Publication number
- EP1858662A1 EP1858662A1 EP06701517A EP06701517A EP1858662A1 EP 1858662 A1 EP1858662 A1 EP 1858662A1 EP 06701517 A EP06701517 A EP 06701517A EP 06701517 A EP06701517 A EP 06701517A EP 1858662 A1 EP1858662 A1 EP 1858662A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- metal
- nanoparticles
- jet
- ceramic
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 title claims abstract description 29
- 238000009749 continuous casting Methods 0.000 title claims abstract description 18
- 239000002105 nanoparticle Substances 0.000 claims abstract description 29
- 239000000919 ceramic Substances 0.000 claims abstract description 27
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 11
- 239000011343 solid material Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 43
- 239000010959 steel Substances 0.000 claims description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 18
- 239000011159 matrix material Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000000462 isostatic pressing Methods 0.000 claims description 3
- 238000005551 mechanical alloying Methods 0.000 claims description 3
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 229910021332 silicide Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 claims description 2
- 238000005054 agglomeration Methods 0.000 claims description 2
- 230000002776 aggregation Effects 0.000 claims description 2
- 229910002065 alloy metal Inorganic materials 0.000 claims description 2
- 239000010953 base metal Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- 239000011859 microparticle Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 239000000047 product Substances 0.000 description 15
- 238000011282 treatment Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 3
- 230000000930 thermomechanical effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000011837 pasties Nutrition 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/108—Feeding additives, powders, or the like
Definitions
- the present invention relates to a new process for the continuous casting of a molten metal, in particular steel, to obtain an intermediate product such as slab, billet, wire, etc., before subsequent thermomechanical treatment such as rolling, continuous annealing, etc., so that its chemical composition has been modified by adding elements, in order to give it a higher mechanical strength.
- the following description refers more particularly to the continuous casting of steel. This choice, however, is only an example and does not involve any limitation of the invention.
- the invention also relates to the product with improved mechanical characteristics obtained by the method.
- the technique of continuous casting of steel is well known. It essentially consists in supplying, with molten steel coming from a ladle or a tundish, a cooled copper or copper alloy mold, called a continuous casting mold, the latter being open. at its lower end, and to extract through this opening an ingot in the form of a continuous strand partially solidified.
- the molten steel is introduced into the mold by means of at least one nozzle, that is to say a generally tubular element disposed between the tundish and the mold.
- the lower end of the nozzle is usually provided with one or two outlets located in the axis of the nozzle or laterally, and opens under the free level of liquid steel present in the mold.
- nozzles for obtaining a better cooling of the superheated liquid steel from the tundish.
- the goal is to obtain pasty steel at the inlet of the mold.
- These nozzles may in particular have a heat exchanger consisting of a water-cooled copper tube or a deflector or dome. It acts to force the superheated steel to flow in a thin layer along the walls of the nozzle, which significantly increases the heat exchange surface.
- the cooling of the duct ensures the elimination of the overheating of the steel and causes the appearance of a solid fraction which makes the pasty steel at its inlet into the ingot mold.
- a protective gas under pressure for example argon
- the introduction of a protective gas under pressure, for example argon, in the conduit causes an overpressure which prevents any entrainment of air by the liquid steel, which would lead to the oxidation thereof or to the formation of alumina with plugging of the nozzle.
- the technique described in patent EP-B-269 180 is called hollow jet casting or by means of a HJN nozzle for hollow jet nozzle.
- a continuous casting nozzle having in its upper part a dome-shaped distributor device designed to separate the liquid steel in two jets, a internal jet and an external jet, in two physically separated areas.
- Finely divided gaseous, liquid or solid material injecting means under the dome in the inner zone allow the formation of a steel of different chemical composition from that of the base steel, poured into the outer zone.
- thermomechanical treatments to increase the mechanical characteristics of a steel for example by the microstructure (martensite, bainite, etc.) or endogenous precipitation, have the disadvantage that the structure of the steel finally obtained can be altered by a thermal after-treatment of the product (eg welding, galvanizing, etc.). It would therefore be desirable, at least in certain cases, to be able to directly cast a product whose structure and consequently the mechanical properties are stable throughout the subsequent treatments that the product could undergo.
- the present invention aims to provide a solution that allows to overcome the disadvantages of the state of the art.
- the present invention is aimed in particular at providing a continuous casting process which makes it possible to obtain slabs or billets of composition adapted to impart to the steel a greater mechanical strength before rolling.
- the invention aims in particular to obtain a steel of homogeneous chemical composition and / or stabilized structure vis-à-vis a rolling process and / or thermomechanical treatment after casting.
- a particular object of the present invention is to use the hollow jet technique to inject through the continuous casting nozzle finely divided ceramic particles.
- a first object of the present invention relates to a method for the continuous casting of a metal in the form of a hollow jet in a nozzle located between a ladle or a tundish and a continuous casting mold, said nozzle comprising in its upper part a distributor member capable of deflecting at least a portion of the liquid metal arriving at the inlet of the nozzle towards an inner wall of the nozzle before it enters the ingot mold, said method comprising an injection into an interior volume of the hollow jet of finely divided solid material, characterized in that the finely divided solid material comprises technical ceramic nanoparticles, of characteristic size less than 200 nm and preferably 100 nm.
- the technical ceramic nanoparticles comprise nanoparticles of oxides, nitrides, carbides, borides, silicides and / or compounds thereof.
- the oxides are Al 2 O 3 , TiO 2 , SiO 2 , MgO, ZrO 2 or Y 2 O 3 .
- the size of the nanoparticles is between 10 and 100 nm.
- the amount of nanoparticles incorporated in the liquid metal is less than or equal to 5 percent, preferably between 0.1 and 1 percent, by weight of cast metal.
- the ceramic nanoparticles injected into the interior volume of the hollow jet of the nozzle are suspended in a non-oxidizing gas, preferably argon, said gas being slight overpressure with respect to the atmospheric pressure and at most equal to the static pressure of the metal cast at the inlet thereof into the mold.
- the ceramic nanoparticles are injected into the interior volume of the hollow jet of the nozzle by means of a mechanical transport device such as a worm.
- the nanoparticles are agglomerated, prior to their injection into the nozzle, into microparticles of size essentially between 10 and 1000 microns, preferably between 100 and 200 microns.
- the nanoparticles are agglomerated in a metal matrix or not of the same metal as the cast metal.
- the cast metal is liquid steel and the metal matrix is an iron matrix or the metal matrix comprises an alloy metal other than iron.
- the agglomeration of the nanoparticles is obtained by mixing nanoparticles of ceramic with micrometric particles of iron, that is to say of size greater than 10 microns, and preferably less than 20 microns.
- said mixture is made by premixing in a slurry, followed by drying, milling, isostatic pressing and regrinding.
- said mixture is made by a high energy hype of "mechanical alloying" type to obtain an insertion of ceramics in the iron matrix.
- the hollow jet nozzle used is of the rotating jet type, that is to say composed of a vertical duct comprising in its upper part a dome-shaped distribution member, whose function is to divert the liquid metal entering the nozzle to the inner surface of said conduit and which has a plurality of arms symmetrically arranged in a star with respect to the axis of the nozzle and inclined relative to the horizontal, said arms being configured for printing on the liquid steel a helical twist movement along the inner wall of the nozzle.
- the hollow jet nozzle used has in its upper part a dome-shaped distributor member designed to separate the liquid metal into two jets, an inner jet and an outer jet, in two physically good zones.
- injection '• ceramic nanoparticles can be performed in the outer area of the nozzle.
- a second subject of the present invention relates to a metal, preferably a steel, of high mechanical strength occurring after casting in the form of a continuous strand ingot at the outlet of a continuous casting mold, specially obtained by the method described above, and comprising less than one percent by weight of technical ceramic homogeneously distributed in at least a portion of the ingot.
- the addition of particles in the liquid metal is carried out directly at the level of the continuous casting nozzle, since this, in the embodiments generally employed, and described above, generally comprises means for the introduction of alloying elements or oxides in at least a fraction of the liquid metal passing through the nozzle.
- the added particles are ceramic particles. It is known to those skilled in the art that they are called technical ceramics or industrial class of manufactured materials that are non-metallic and inorganic. They are divided into two major families: oxides (for example Al 2 O 3 , TiCb,
- the ceramic particles will have to meet the following operational definition: they are of nanometric size, typically 10-100 nanometers
- the amounts of nanoparticles added to the liquid steel are 1 percent by weight.
- the wettability of the particles in the liquid steel is the most important criterion for the choice of particles and the resolution of this technical problem is at the heart of the present invention.
- a homogeneous distribution of the nanoparticles in the liquid steel is essential, which excludes a confinement of the powders injected on the surface of the liquid steel.
- the particles may advantageously be agglomerated to a size of 100-200 ⁇ m to be injected through the nozzle HJN.
- the nanoscale ceramic particles can be agglomerated in an iron matrix. or metal to obtain a compound whose characteristic final size is 100-200 ⁇ m.
- the iron or metal matrix promotes the dispersion of the particles in the liquid steel.
- nanometric particles of ceramic mixed with micrometric particles of iron (the size of which is for example 10 to 20 microns) are used.
- the mixture is produced either by: - mixing in a slip, followed by drying, grinding, isostatic pressing and regrinding; high-energy hitting (mechanical alloying) to obtain an insertion of ceramics into the iron matrix. Threshing is an operation of bringing into contact and introducing an element into an assembly formed of one or more different elements of the first element by exerting a force on the element.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Forging (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2005/0139A BE1016550A3 (fr) | 2005-03-16 | 2005-03-16 | Procede pour couler en continu un metal a resistance mecanique amelioree et produit obtenu par le procede. |
PCT/BE2006/000003 WO2006096942A1 (fr) | 2005-03-16 | 2006-01-19 | Procede pour couler en continu un metal a resistance mecanique amelioree et produit obtenu par le procede |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1858662A1 true EP1858662A1 (fr) | 2007-11-28 |
EP1858662B1 EP1858662B1 (fr) | 2010-10-27 |
Family
ID=35063235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06701517A Not-in-force EP1858662B1 (fr) | 2005-03-16 | 2006-01-19 | Procede pour couler en continu un metal a resistance mecanique amelioree et produit obtenu par le procede |
Country Status (10)
Country | Link |
---|---|
US (1) | US20090266506A1 (fr) |
EP (1) | EP1858662B1 (fr) |
JP (1) | JP4906840B2 (fr) |
KR (1) | KR101257326B1 (fr) |
AT (1) | ATE485906T1 (fr) |
BE (1) | BE1016550A3 (fr) |
CA (1) | CA2599440C (fr) |
DE (1) | DE602006017811D1 (fr) |
ES (1) | ES2351886T3 (fr) |
WO (1) | WO2006096942A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9004150B2 (en) | 2005-03-16 | 2015-04-14 | Centre de Recherches Metallurgiques ASBL—Centrum Voor Research in de Metallurgie VZW | Method for continuous casting of a metal with improved mechanical strength and product obtained by said method |
BE1017392A3 (fr) * | 2006-12-12 | 2008-08-05 | Ct Rech Metallurgiques Asbl | Busette a jet creux pour coulee continue d'acier. |
EP2047926A1 (fr) | 2007-10-10 | 2009-04-15 | Ugine & Alz France | Procéde de fabrication d'aciers inoxydables comportant de fins carbonitrures, et produit obtenu à partir de ce procédé |
KR101269451B1 (ko) * | 2011-06-27 | 2013-05-30 | 연세대학교 산학협력단 | 산소 원자 분산된 금속 기지 복합재 및 그 제조 방법 |
EP2830792B1 (fr) * | 2012-03-28 | 2019-02-20 | ArcelorMittal | Processus de coulée continue de métal |
CN103243194B (zh) * | 2013-05-31 | 2015-01-21 | 安徽工业大学 | 一种向钢液中加入纳米粒子以优化钢组织的方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2656551A1 (fr) * | 1990-01-04 | 1991-07-05 | Pechiney Recherche | Procede et dispositif pour la coulee continue de composites a matrice metallique renforcee par des particules d'un materiau ceramique refractaire. |
JP2863675B2 (ja) * | 1992-09-01 | 1999-03-03 | 井上 明久 | 粒子強化複合材の製造方法 |
BE1006567A6 (fr) * | 1992-12-28 | 1994-10-18 | Centre Rech Metallurgique | Procede de coulee d'un metal en phase pateuse. |
JP3426425B2 (ja) * | 1995-10-05 | 2003-07-14 | 新日本製鐵株式会社 | 耐火圧延形鋼用鋳片およびそれを素材とする耐火用圧延形鋼の製造方法 |
US6162530A (en) * | 1996-11-18 | 2000-12-19 | University Of Connecticut | Nanostructured oxides and hydroxides and methods of synthesis therefor |
BE1012037A3 (fr) * | 1998-06-11 | 2000-04-04 | Centre Rech Metallurgique | Busette pour couler en continu de l'acier. |
US6251159B1 (en) * | 1998-12-22 | 2001-06-26 | General Electric Company | Dispersion strengthening by nanophase addition |
BE1013745A3 (fr) * | 2000-10-10 | 2002-07-02 | Ct De Rech S Metallurg Ass San | Procede et dispositif pour couler en continu de l'acier a composition chimique mixte. |
DE10253577B4 (de) * | 2002-11-15 | 2011-05-19 | Ab Skf | Verfahren zur Herstellung eines dispersionsgehärteten Eisenwerkstoffs |
US7235118B2 (en) * | 2003-04-16 | 2007-06-26 | National Research Council Of Canada | Process for agglomeration and densification of nanometer sized particles |
-
2005
- 2005-03-16 BE BE2005/0139A patent/BE1016550A3/fr not_active IP Right Cessation
-
2006
- 2006-01-19 KR KR1020077021254A patent/KR101257326B1/ko not_active IP Right Cessation
- 2006-01-19 JP JP2008501114A patent/JP4906840B2/ja not_active Expired - Fee Related
- 2006-01-19 EP EP06701517A patent/EP1858662B1/fr not_active Not-in-force
- 2006-01-19 AT AT06701517T patent/ATE485906T1/de active
- 2006-01-19 WO PCT/BE2006/000003 patent/WO2006096942A1/fr active Search and Examination
- 2006-01-19 DE DE602006017811T patent/DE602006017811D1/de active Active
- 2006-01-19 ES ES06701517T patent/ES2351886T3/es active Active
- 2006-01-19 CA CA2599440A patent/CA2599440C/fr not_active Expired - Fee Related
- 2006-01-19 US US11/883,979 patent/US20090266506A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2006096942A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2351886T3 (es) | 2011-02-11 |
DE602006017811D1 (de) | 2010-12-09 |
CA2599440A1 (fr) | 2006-09-21 |
JP2008532772A (ja) | 2008-08-21 |
ATE485906T1 (de) | 2010-11-15 |
US20090266506A1 (en) | 2009-10-29 |
KR20070110368A (ko) | 2007-11-16 |
WO2006096942A1 (fr) | 2006-09-21 |
JP4906840B2 (ja) | 2012-03-28 |
CA2599440C (fr) | 2014-08-19 |
KR101257326B1 (ko) | 2013-04-24 |
EP1858662B1 (fr) | 2010-10-27 |
BE1016550A3 (fr) | 2007-01-09 |
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