EP1285972A1 - Procédé de galvanisation à chaud de bandes métalliques d'aciers à haute résistance - Google Patents
Procédé de galvanisation à chaud de bandes métalliques d'aciers à haute résistance Download PDFInfo
- Publication number
- EP1285972A1 EP1285972A1 EP02292018A EP02292018A EP1285972A1 EP 1285972 A1 EP1285972 A1 EP 1285972A1 EP 02292018 A EP02292018 A EP 02292018A EP 02292018 A EP02292018 A EP 02292018A EP 1285972 A1 EP1285972 A1 EP 1285972A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- atmosphere
- steel
- dew point
- oven
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 13
- 239000010959 steel Substances 0.000 title claims abstract description 13
- 238000005246 galvanizing Methods 0.000 title description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002955 isolation Methods 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 230000033116 oxidation-reduction process Effects 0.000 claims abstract description 4
- 238000011282 treatment Methods 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims abstract description 3
- 230000036961 partial effect Effects 0.000 claims abstract description 3
- 230000001681 protective effect Effects 0.000 claims abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 238000007792 addition Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 235000013980 iron oxide Nutrition 0.000 description 4
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 240000008042 Zea mays Species 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 235000020004 porter Nutrition 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- 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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
Definitions
- the present invention relates to dip galvanizing steel strips with improved mechanical properties in vertical ovens. It more specifically targets a process for performing chemical treatments of the strip, simultaneously or not with the heat treatment of the annealing, such as oxidation-reduction, etc., in atmospheres different from those of the usual sections from the oven.
- the tape circulates in an atmosphere reducing from the inlet to the outlet of the oven or, if there is an open preheating zone, from the outlet of it at the outlet of the oven.
- the reducing atmosphere is therefore kept in the oven at the latest from the exit from preheating is traditionally at a strip temperature from 650 to 700 ° C.
- the purpose of this process is purpose of limiting the formation of oxides, mainly of iron, to the surface of the strip and to reduce them if any exists or if it has formed in the preheater in order to allow good attachment of zinc to the surface of the strip to obtain a good quality galvanized product.
- the stay of the strip under this reducing atmosphere must be done in sufficient conditions (temperature, residence time, dew point of the furnace atmosphere) to allow cleaning of the tape compatible with good quality of subsequent coating, in particular zinc adhesion.
- the invention proposes to solve the technical problem exposed above by providing a process which makes it possible to hot-dip galvanizing of very different grades of steel loaded with hardening elements in furnaces traditional construction.
- this invention relates to a method of continuous metal strip thermochemical treatment, of the oxidation-reduction type according to which the strip moves at the through an oven, in a protective atmosphere, characterized in that the strip passes through at least a partial or total isolation device, positioned at within at least one section of the oven, or between two sections, the strip being heated in this device isolation, in dew point atmospheres suitable for each strip, depending on the specific composition of steel and applied thermal cycle.
- the process which is the subject of the invention mainly consists of allowing the strip to be heated in different dew point atmospheres depending on temperature ranges different from those known in the state of the art, and in particular at points of dew above the usual values, thanks to isolation devices.
- Oxygen goes then oxidize the atoms of Si, ... inside the metal. he then there will no longer be enough Si, ... available to migrate towards the surface and feed the surface oxidation, especially since the kinetics of oxygen diffusion through the joints is faster than the diffusion of atoms oxidizable in metal. Furthermore, this oxidation internal will block the diffusion of these atoms towards the surface, which further limits the amount of these oxides trained.
- the implementation of the method according to the invention consists in allow to precisely control the dew point of this atmosphere in the heating chamber so that this atmosphere is oxidizing for the targeted elements but remains reductive for iron, which should not be oxidize.
- the downstream section of the oven - the end of maintenance and the cooling - will remain reducing, to reduce iron oxides which may have been possibly formed in the high dew point section, which will not reverse the internal oxidation process of metallic additives steel, because the oxides formed from these additives are more stable than iron oxides.
- the dew point of the atmosphere can be modified according to the thermal cycle, i.e. the oven section temperature and the stay of the band in the latter, to integrate the variations in strip thickness.
- the process which is the subject of the invention therefore proposes to be able to confine a controlled atmosphere whose dew point is higher than that used in ovens according to the state art in order to be less reductive, this in a section of the high temperature oven of a line of conventional galvanization.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Furnace Details (AREA)
Abstract
Description
- dans certains cas, une zone de préchauffage à feu nu, c'est-à-dire munie de brûleurs qui développent leur flamme directement dans l'enceinte. Cette zone permet traditionnellement de porter la bande de la température ambiante à une température d'environ 650 à 700°C.
- une zone de chauffage par tubes radiants dans laquelle la température de la bande est portée à environ 700 à 900°C. Cette zone de chauffage est placée sous atmosphère réductrice afin de permettre la réduction des oxydes formés à la surface de la bande, en particulier les oxydes de fer, et dans tous les cas de ne pas créer d'oxyde s'il n'y en avait pas auparavant ;
- une zone de maintien où la bande reste à une température de palier et durant un temps défini par le type de cycle thermique à réaliser ;
- une ou plusieurs zones de refroidissement suivant des pentes contrôlées selon le type de cycle thermique à réaliser. Ce refroidissement est effectué jusqu'à une température proche de celle du bain de zinc, typiquement 460°C.
- soit à froid, c'est-à-dire par voie électrolytique. Cette solution permet d'utiliser la nuance souhaitée, mais elle est beaucoup plus coûteuse à mettre en oeuvre.
- soit à chaud, mais dans ce cas, il faut ou refroidir
rapidement l'acier (trempe) ou affiner sa nuance :
Tremper l'acier permet d'en limiter la concentration en éléments d'addition, mais nécessite de réaliser après recuit un refroidissement rapide. Ce refroidissement permet la formation de structures multiphasées qui fournissent les propriétés durcissantes souhaitées. Cependant, cette technique est encore peu utilisée.
- d'éviter l'oxydation du fer et donc de garantir l'adhérence ;
- d'adapter la composition chimique de l'atmosphère recherchée ;
- de développer l'oxydation interne des éléments d'addition avant qu'ils ne puissent diffuser en surface et y être oxydés.
Claims (2)
- Procédé de traitement thermochimique en continu de bandes métalliques, notamment d'acier, du type oxydo-réduction, selon lequel la bande se déplace au travers d'un four dans une atmosphère protectrice, caractérisé en ce que ladite bande passe au travers d'au moins un dispositif d'isolement partiel ou total, positionné au sein d'au moins une section du four, ou entre deux sections, la bande étant chauffée, dans ce dispositif d'isolement, dans des atmosphères à point de rosée adapté à chaque bande en fonction de la composition spécifique de l'acier, de manière que l'atmosphère soit oxydante pour certains éléments d'addition, mais demeure réductrice pour le fer.
- Procédé selon la revendication 1, caractérisé en ce que le point de rosée de ladite atmosphère peut être modifiée en fonction du cycle thermique, c'est-à-dire de la température de la section du four et du temps de séjour de la bande dans cette dernière, pour intégrer les variations d'épaisseur de la bande.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0110957 | 2001-08-21 | ||
| FR0110957A FR2828888B1 (fr) | 2001-08-21 | 2001-08-21 | Procede de galvanisation a chaud de bandes metalliques d'aciers a haute resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1285972A1 true EP1285972A1 (fr) | 2003-02-26 |
Family
ID=8866629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02292018A Withdrawn EP1285972A1 (fr) | 2001-08-21 | 2002-08-09 | Procédé de galvanisation à chaud de bandes métalliques d'aciers à haute résistance |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6913658B2 (fr) |
| EP (1) | EP1285972A1 (fr) |
| JP (1) | JP2003183799A (fr) |
| BR (1) | BR0203383A (fr) |
| DE (1) | DE1285972T1 (fr) |
| ES (1) | ES2188434T1 (fr) |
| FR (1) | FR2828888B1 (fr) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1457580A1 (fr) * | 2003-03-12 | 2004-09-15 | STEIN HEURTEY, Société Anonyme: | Procédé d'oxydation controlée de bandes avant galvanisation en continu et ligne de galvanisation |
| WO2006061151A1 (fr) * | 2004-12-09 | 2006-06-15 | Thyssenkrupp Steel Ag | Procede de galvanisation a chaud d'une bande d'acier de resistance superieure |
| WO2007124781A1 (fr) * | 2006-04-26 | 2007-11-08 | Thyssenkrupp Steel Ag | Procédé de revêtement par immersion en fusion d'un produit plat en acier hyperrésistant |
| EP1612288A4 (fr) * | 2003-04-10 | 2007-12-19 | Nippon Steel Corp | Feuille d'acier galvanisee a resistance elevee et son procede de production |
| FR2920439A1 (fr) * | 2007-09-03 | 2009-03-06 | Siemens Vai Metals Tech Sas | Procede et dispositif d'oxydation/reduction controlee de la surface d'une bande d'acier en defilement continu dans un four a tubes radiants en vue de sa galvanisation |
| DE102007061489A1 (de) * | 2007-12-20 | 2009-06-25 | Voestalpine Stahl Gmbh | Verfahren zum Herstellen von gehärteten Bauteilen aus härtbarem Stahl und härtbares Stahlband hierfür |
| RU2403315C2 (ru) * | 2006-04-26 | 2010-11-10 | Тиссенкрупп Стил Аг | Способ покрытия стального плоского проката из высокопрочной стали |
| RU2429084C2 (ru) * | 2006-05-18 | 2011-09-20 | Тиссенкрупп Стил Аг | Стальной плоский прокат и способ изготовления стального тонкого проката |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4192051B2 (ja) * | 2003-08-19 | 2008-12-03 | 新日本製鐵株式会社 | 高強度合金化溶融亜鉛めっき鋼板の製造方法と製造設備 |
| CN101287854B (zh) * | 2005-10-14 | 2011-04-20 | 新日本制铁株式会社 | 含Si钢板的连续退火热浸镀方法以及连续退火热浸镀装置 |
| EP2009129A1 (fr) * | 2007-06-29 | 2008-12-31 | ArcelorMittal France | Processus de fabrication d'une plaque d'acier galvanisée par régulation DFF |
| EP2009127A1 (fr) * | 2007-06-29 | 2008-12-31 | ArcelorMittal France | Procédé pour la fabrication d'une feuille d'acier galvanisé ou recuit après galvanisation par régulation DFF |
| DE102010037254B4 (de) * | 2010-08-31 | 2012-05-24 | Thyssenkrupp Steel Europe Ag | Verfahren zum Schmelztauchbeschichten eines Stahlflachprodukts |
| JP5609494B2 (ja) * | 2010-09-29 | 2014-10-22 | Jfeスチール株式会社 | 高強度鋼板およびその製造方法 |
| BR112013007154A2 (pt) | 2010-09-30 | 2016-06-14 | Jfe Steel Corp | folha de aço de alta resistência e método para fabricação da mesma |
| EP2458022B2 (fr) * | 2010-11-30 | 2024-01-17 | Tata Steel UK Limited | Procédé de galvanisation de bande d'acier dans une ligne de galvanisation à chaud en continu |
| JP5966528B2 (ja) * | 2011-06-07 | 2016-08-10 | Jfeスチール株式会社 | めっき密着性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 |
| KR20160007648A (ko) | 2013-05-17 | 2016-01-20 | 에이케이 스틸 프로퍼티즈 인코포레이티드 | 프레스 경화 적용을 위한 아연-코팅된 스틸 및 그 생산 방법 |
| IT202000013879A1 (it) | 2020-06-10 | 2021-12-10 | Tenova Spa | Gruppo bruciatore a fiamma libera per forni per il trattamento termo-chimico di nastri d’acciaio in impianti per la zincatura a caldo continua. |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3925579A (en) * | 1974-05-24 | 1975-12-09 | Armco Steel Corp | Method of coating low alloy steels |
| US4183983A (en) * | 1978-08-17 | 1980-01-15 | Selas Corporation Of America | Method for reducing metal oxide formation on a continuous metal sheet in the hot dip coating thereof |
| JPH02285057A (ja) * | 1989-04-27 | 1990-11-22 | Sumitomo Metal Ind Ltd | 溶融亜鉛めっき用鋼板の連続焼鈍方法 |
| BE1011131A6 (fr) * | 1997-04-28 | 1999-05-04 | Centre Rech Metallurgique | Procede de revetement d'une bande d'acier par galvanisation a chaud. |
| EP1076105A1 (fr) * | 1999-02-25 | 2001-02-14 | Kawasaki Steel Corporation | Plaque d'acier, plaque d'acier obtenue par immersion a chaud et alliage de plaque d'acier obtenue par immersion a chaud et leurs procedes de production |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6635313B2 (en) * | 2001-11-15 | 2003-10-21 | Isg Technologies, Inc. | Method for coating a steel alloy |
-
2001
- 2001-08-21 FR FR0110957A patent/FR2828888B1/fr not_active Expired - Lifetime
-
2002
- 2002-08-09 DE DE1285972T patent/DE1285972T1/de active Pending
- 2002-08-09 ES ES02292018T patent/ES2188434T1/es active Pending
- 2002-08-09 EP EP02292018A patent/EP1285972A1/fr not_active Withdrawn
- 2002-08-13 US US10/216,794 patent/US6913658B2/en not_active Expired - Lifetime
- 2002-08-21 JP JP2002240292A patent/JP2003183799A/ja active Pending
- 2002-08-21 BR BR0203383-6A patent/BR0203383A/pt not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3925579A (en) * | 1974-05-24 | 1975-12-09 | Armco Steel Corp | Method of coating low alloy steels |
| US4183983A (en) * | 1978-08-17 | 1980-01-15 | Selas Corporation Of America | Method for reducing metal oxide formation on a continuous metal sheet in the hot dip coating thereof |
| JPH02285057A (ja) * | 1989-04-27 | 1990-11-22 | Sumitomo Metal Ind Ltd | 溶融亜鉛めっき用鋼板の連続焼鈍方法 |
| BE1011131A6 (fr) * | 1997-04-28 | 1999-05-04 | Centre Rech Metallurgique | Procede de revetement d'une bande d'acier par galvanisation a chaud. |
| EP1076105A1 (fr) * | 1999-02-25 | 2001-02-14 | Kawasaki Steel Corporation | Plaque d'acier, plaque d'acier obtenue par immersion a chaud et alliage de plaque d'acier obtenue par immersion a chaud et leurs procedes de production |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 015, no. 056 (C - 0804) 8 February 1991 (1991-02-08) * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1457580A1 (fr) * | 2003-03-12 | 2004-09-15 | STEIN HEURTEY, Société Anonyme: | Procédé d'oxydation controlée de bandes avant galvanisation en continu et ligne de galvanisation |
| FR2852330A1 (fr) * | 2003-03-12 | 2004-09-17 | Stein Heurtey | Procede d'oxydation controlee de bandes avant galvanisation en continu et ligne de galvanisation |
| CN100554489C (zh) * | 2003-03-12 | 2009-10-28 | 斯坦尼埃尔迪公司 | 钢带连续电镀前的氧化控制方法和电镀作业线 |
| EP1612288A4 (fr) * | 2003-04-10 | 2007-12-19 | Nippon Steel Corp | Feuille d'acier galvanisee a resistance elevee et son procede de production |
| US7687152B2 (en) | 2003-04-10 | 2010-03-30 | Nippon Steel Corporation | High strength molten zinc plated steel sheet and process of production of same |
| US8652275B2 (en) | 2004-12-09 | 2014-02-18 | Thyssenkrupp Steel Ag | Process for melt dip coating a strip of high-tensile steel |
| WO2006061151A1 (fr) * | 2004-12-09 | 2006-06-15 | Thyssenkrupp Steel Ag | Procede de galvanisation a chaud d'une bande d'acier de resistance superieure |
| US8636854B2 (en) | 2006-04-26 | 2014-01-28 | Thyssenkrupp Steel Ag | Method for melt immersion coating of a flat steel product made of high strength steel |
| WO2007124781A1 (fr) * | 2006-04-26 | 2007-11-08 | Thyssenkrupp Steel Ag | Procédé de revêtement par immersion en fusion d'un produit plat en acier hyperrésistant |
| RU2403315C2 (ru) * | 2006-04-26 | 2010-11-10 | Тиссенкрупп Стил Аг | Способ покрытия стального плоского проката из высокопрочной стали |
| RU2429084C2 (ru) * | 2006-05-18 | 2011-09-20 | Тиссенкрупп Стил Аг | Стальной плоский прокат и способ изготовления стального тонкого проката |
| US8609192B2 (en) | 2007-09-03 | 2013-12-17 | Siemens Vai Metals Technologies Sas | Method and device for controlling oxidizing-reducing of the surface of a steel strip running continuously through a radiant tubes furnace for its galvanizing |
| CN101796203B (zh) * | 2007-09-03 | 2011-12-14 | 西门子Vai金属科技有限公司 | 连续行经辐射管炉用以镀锌的钢带的表面受控氧化-还原的方法和设备 |
| WO2009030823A1 (fr) * | 2007-09-03 | 2009-03-12 | Siemens Vai Metals Technologies Sas | Procede et dispositif d'oxydation/reduction controlee de la surface d'une bande d'acier en defilement continu dans un four a tubes radiants en vue de sa galvanisation |
| FR2920439A1 (fr) * | 2007-09-03 | 2009-03-06 | Siemens Vai Metals Tech Sas | Procede et dispositif d'oxydation/reduction controlee de la surface d'une bande d'acier en defilement continu dans un four a tubes radiants en vue de sa galvanisation |
| DE102007061489A1 (de) * | 2007-12-20 | 2009-06-25 | Voestalpine Stahl Gmbh | Verfahren zum Herstellen von gehärteten Bauteilen aus härtbarem Stahl und härtbares Stahlband hierfür |
| US9090951B2 (en) | 2007-12-20 | 2015-07-28 | Voestalpine Stahl Gmbh | Method for producing coated and hardened components of steel and coated and hardened steel strip therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| US6913658B2 (en) | 2005-07-05 |
| JP2003183799A (ja) | 2003-07-03 |
| FR2828888A1 (fr) | 2003-02-28 |
| FR2828888B1 (fr) | 2003-12-12 |
| ES2188434T1 (es) | 2003-07-01 |
| DE1285972T1 (de) | 2003-09-18 |
| US20030047255A1 (en) | 2003-03-13 |
| BR0203383A (pt) | 2003-05-20 |
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