US20100065162A1 - Method for Manufacturing Flat Steel Products From Aluminum Alloyed Multi-Phase Steel - Google Patents
Method for Manufacturing Flat Steel Products From Aluminum Alloyed Multi-Phase Steel Download PDFInfo
- Publication number
- US20100065162A1 US20100065162A1 US12/447,627 US44762707A US2010065162A1 US 20100065162 A1 US20100065162 A1 US 20100065162A1 US 44762707 A US44762707 A US 44762707A US 2010065162 A1 US2010065162 A1 US 2010065162A1
- Authority
- US
- United States
- Prior art keywords
- hot
- rolled strip
- strip
- rolled
- cold
- 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.)
- Abandoned
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title description 2
- 238000005098 hot rolling Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 4
- 238000010924 continuous production Methods 0.000 claims abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 3
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 10
- 238000005266 casting Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/041—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing involving a particular fabrication or treatment of ingot or slab
- C21D8/0415—Rapid solidification; Thin strip casting
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
-
- 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
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—Hot rolling
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0473—Final recrystallisation annealing
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Definitions
- the invention relates to a method for manufacturing flat steel products, such as strips or sheet metal blanks, from high-tensile, aluminum alloyed steels.
- Such steels belong to the group of multi-phase steels. These are usually steels, the properties of which are determined by type, quantity and alignment of the phases of the microstructure. Therefore at least two phases exist in the microstructure (ferrite, martensite, bainite for example). As a result, they have a superior strength/formability combination compared to conventional steels.
- multi-phase steels are of major interest for automotive construction, since due to their high strength on the one hand they allow the use of smaller material thicknesses and consequently at the same time a reduction in the vehicle weight and on the other hand improve the safety of the vehicle body in the event of a collision (crash behavior).
- multi-phase steels with at least equal strength of the overall body permit a reduction in the sheet metal thickness of a component made from such multi-phase steels compared to a body made from conventional steels.
- multi-phase steels are melted in a converter steel mill and cast on a continuous casting machine into slabs or thin slabs, which are then hot-rolled into hot-rolled strip and coiled.
- the mechanical properties of the hot-rolled strip can be varied by selectively controlled cooling of the hot-rolled strip after hot-rolling with the aim of adjusting certain microstructural fractions.
- the hot-rolled strip can also be cold-rolled into cold-rolled strip in order to also obtain thinner sheet metal thicknesses (EP 0 910 675 B1, EP 0 966 547 B1, EP 1 169 486 B1, EP 1 319 725 B1, EP 1 398 390 A1).
- a problem with manufacturing flat products from high-tensile multi-phase steels with a tensile strength of more than 800 MPa is that high rolling forces must be applied when rolling such steels. This requirement has the consequence that normally with the production machines at present generally available, high-tensile hot-rolled strip made from steel of the type under discussion can often only be manufactured in a width and thickness, which no longer fully meet the requirements demanded today by the automotive industry. In particular, strip of narrow thickness with sufficient width cannot be produced very well in conventional installations. Also, with conventional methods it is shown in practice that it is difficult to manufacture cold-rolled strip with a strength of more than 800 MPa from multi-phase steel.
- the cast strip is subsequently hot-rolled in-line into a hot-rolled strip in one or more passes, the deformation degree ranging between 25% and 70%.
- the final hot-rolling temperature in this case is above the Ara temperature.
- the obtained hot-rolled strip is then cooled down in two steps. In the first step of this cooling a cooling rate of 5-100° C. per second is maintained until a temperature ranging between 400-550° C. is reached.
- the hot-rolled strip is then held at this temperature for a dwell time, which is needed in order to allow bainitic transformation of the steel with a residual austenite content greater than 5%.
- the formation of pearlite in this case is to be avoided.
- the transformation process is interrupted by the beginning of the second cooling step, wherein the hot-rolled strip is brought to a temperature below 400° C., in order then to wind it into a coil at a coiling temperature below 350° C.
- an aspect of the invention is to provide a method, which allows high-tensile flat steel products to be manufactured with less effort in a wide range of geometrical dimensions.
- the aspect indicated above has been achieved by a method for manufacturing flat steel products, wherein according to the invention a steel that forms a multi-phase microstructure, which (in wt. %) contains 0.10-0.14% C, 1.30-1.70% Mn, up to 0.030% P, up to 0.004% S, 0.10-0.30% Si, 0.90-1.2% Al, up to 0.0070% N, 0.070-0.130% Ti, 0.040-0.060% Nb, 0.140-0.260% Mo and remainder iron and unavoidable impurities, is cast into a cast strip having a thickness of 1-4 mm, wherein the cast strip is hot-rolled in-line into a hot-rolled strip having a thickness of 0.5 to 3.2 mm in a continuous process at a final hot-rolling temperature ranging from 850 to 1000° C., the deformation degree being greater than 20%, and wherein the hot-rolled strip is coiled at a coiling temperature ranging from 350 to 480° C., so as to obtain a hot
- the invention provides a method of casting to convert a particularly high-tensile, peritectically solidifying multi-phase steel into a hot-rolled strip. Since the cast strip itself in this case already possesses a narrow thickness, only relatively low deformation degrees must be maintained in the course of hot-rolling this strip, in order to manufacture flat products with narrow thicknesses, as they are needed particularly in the field of automotive construction. Thus it is possible with the method according to the invention, by specifying a corresponding initial thickness of the cast strip, to produce without any problems hot-rolled strip, which with an optimal characteristic distribution has a maximum thickness of 1.5 mm and from which components for the support structure of a vehicle for example can be manufactured.
- the rolling forces necessary for this are low, so that hot-rolled strip of large width, which lies substantially above the width of hot-rolled strip of the same strength and thickness cast in the conventional way, can be produced without any problems with the method according to the invention.
- the invention permits high-tensile hot-rolled strip, consisting of a martensitic steel with the composition indicated and processed according to the invention, the width of which is greater than 1,200 mm, in particular greater than 1,600 mm, to be reliably produced.
- the application according to the invention of the strip casting process for converting high-tensile steels of the type composed according to the invention apart from the advantages mentioned above, due to their characteristics and process variables specific to the method (hot-rolling final temperature, cooling, coiling temperature for example) offers the possibility, also in respect to their solidification behavior, of reliably casting critical steel compositions of the type processed according to the invention.
- very rapid solidification of the cast strip, characteristic of strip casting leads to a substantially reduced risk of the emergence of center liquations, compared to conventional production, with the consequence that the hot-rolled strip produced according to the invention has a particularly uniform characteristic distribution and microstructure over its cross section and its length.
- a further special advantage of the method according to the invention is that the hot-rolled strip produced according to the invention has a high strength of at least 800 MPa, without in addition a special cooling cycle of the hot-rolled strip having to be maintained between the end of hot-rolling and coiling, which is prescribed in EP 1 072 689 B1 as the result of the need for a cooling interruption.
- it In carrying out the method according to the invention, it must only be ensured that hot-rolling is terminated in a relatively closely confined temperature window and also that coiling is carried out in a precisely defined temperature range. Single-step cooling takes place in the interim.
- a further advantage of the method according to the invention is that an extension in the range of mechanical properties of the strip produced according to the invention can be achieved, based on a single steel analysis, by varying the cooling and rolling conditions.
- Hot-rolled strip produced according to the invention is particularly suitable for subsequent conversion into cold-rolled strip. Accordingly, one practical embodiment of the invention makes provision for the hot-rolled strip to be cold-rolled into cold-rolled strip having a thickness of 0.5-1.4 mm, in particular 0.7 mm up to 1.3 mm, as is needed for constructing automotive bodies.
- the cold-rolled strip can be annealed at an annealing temperature of 750-850° C.
- a minimum tensile strength of 800 MPa can be reliably ensured.
- a 50 of the cold-rolled strip is 10%.
- the flat product produced according to the invention is characterized by particularly good coatability.
- the cold-rolled strip is provided in the way known per se with a metallic coating, in which, for example, this can be a zinc coating.
- the strength and elongation values of hot-rolled strip produced according to the invention can be adjusted over a large range by corresponding coordination of the final hot-rolling and coiling temperatures. If for example hot-rolled strip, which has a minimum breaking elongation A 80 of the obtained hot-rolled strip of 10% and a minimum tensile strength R m of 800 MPa, is to be manufactured, this can be achieved due to the final hot-rolling temperature being 900-1000° C. and the coiling temperature being 400-480° C.
- a hot-rolled strip with a higher tensile strength R m of at least 1100 MPa at a minimum breaking elongation A 80 of 5% is to be manufactured, in order to do this a final hot-rolling temperature ranging from 850 to 1100° C. and a coiling temperature ranging from 350 to 400° C. are selected.
- the strips cast out of the steels A and B have been hot-rolled in-line in four different trials directly after the strip was cast into a hot-rolled strip, having a thickness of 1.25 mm, at a final hot-rolling temperature WET. Subsequently, the obtained hot-rolled strip in each case was directly cooled in a cooling step to a coiling temperature HT and coiled. After coiling the hot-rolled strips produced from the steels A and B in each case had a tensile strength R m and a breaking elongation Ago, which are indicated in Table 2 as the final hot-rolling temperature WET and coiling temperature HT maintained in each case during their production.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Metal Rolling (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Steel (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06123140A EP1918404B1 (de) | 2006-10-30 | 2006-10-30 | Verfahren zum Herstellen von Stahl-Flachprodukten aus einem mit Aluminium legierten Mehrphasenstahl |
| EP06123140.3 | 2006-10-30 | ||
| PCT/EP2007/061391 WO2008052920A1 (de) | 2006-10-30 | 2007-10-24 | Verfahren zum herstellen von stahl-flachprodukten aus einem mit aluminium legierten mehrphasenstahl |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20100065162A1 true US20100065162A1 (en) | 2010-03-18 |
Family
ID=37733702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12/447,627 Abandoned US20100065162A1 (en) | 2006-10-30 | 2007-10-24 | Method for Manufacturing Flat Steel Products From Aluminum Alloyed Multi-Phase Steel |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20100065162A1 (enExample) |
| EP (1) | EP1918404B1 (enExample) |
| JP (1) | JP5350254B2 (enExample) |
| KR (1) | KR101461584B1 (enExample) |
| CN (1) | CN101528966B (enExample) |
| AT (1) | ATE432374T1 (enExample) |
| DE (1) | DE502006003832D1 (enExample) |
| ES (1) | ES2325963T3 (enExample) |
| PL (1) | PL1918404T3 (enExample) |
| WO (1) | WO2008052920A1 (enExample) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090098408A1 (en) * | 2007-10-10 | 2009-04-16 | Nucor Corporation | Complex metallographic structured steel and method of manufacturing same |
| US20100186856A1 (en) * | 2005-10-20 | 2010-07-29 | Nucor Corporation | High strength thin cast strip product and method for making the same |
| US11193188B2 (en) | 2009-02-20 | 2021-12-07 | Nucor Corporation | Nitriding of niobium steel and product made thereby |
| US11225697B2 (en) | 2014-12-19 | 2022-01-18 | Nucor Corporation | Hot rolled light-gauge martensitic steel sheet and method for making the same |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470529A (en) * | 1994-03-08 | 1995-11-28 | Sumitomo Metal Industries, Ltd. | High tensile strength steel sheet having improved formability |
| US6284063B1 (en) * | 1996-07-12 | 2001-09-04 | Thyssen Stahl Ag | Hot-rolled steel strip and method of making it |
| US6328826B1 (en) * | 1999-07-30 | 2001-12-11 | Usinor | Method of fabricating “TRIP” steel in the form of thin strip, and thin strip obtained in this way |
| US20030145911A1 (en) * | 2001-06-13 | 2003-08-07 | Harald Hoffmann | Highly stable, steel and steel strips or steel sheets cold-formed, method for the production of steel strips and uses of said steel |
| US20030219621A1 (en) * | 2000-10-19 | 2003-11-27 | Nkk Corporation | Galvanized steel sheet, method for manufacturing the same, and method for manufacturing press-formed product |
| US20040000633A1 (en) * | 2002-06-28 | 2004-01-01 | Casper Bryan K. | Optical receiver circuit, method, and system |
| US6852180B1 (en) * | 1999-09-24 | 2005-02-08 | Usinor | Method for making carbon steel bands, in particular packaging steel bands, and resulting bands |
| WO2005087965A1 (ja) * | 2004-03-11 | 2005-09-22 | Nippon Steel Corporation | 成形性および穴拡げ性に優れた溶融亜鉛めっき複合高強度鋼板およびその製造方法 |
| US7093342B2 (en) * | 2000-05-26 | 2006-08-22 | Castrip Llc | Hot rolling thin strip |
| US20070144633A1 (en) * | 2004-03-31 | 2007-06-28 | Taro Kizu | High-stiffness high-strength thin steel sheet and method for producing the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3498504B2 (ja) * | 1996-10-23 | 2004-02-16 | 住友金属工業株式会社 | 高延性型高張力冷延鋼板と亜鉛メッキ鋼板 |
| WO2002026424A1 (en) * | 2000-09-29 | 2002-04-04 | Ishikawajima-Harima Heavy Industries Company Limited | Production of thin steel strip |
| EP1396550A1 (de) * | 2002-08-28 | 2004-03-10 | ThyssenKrupp Stahl AG | Verfahren zum Herstellen eines Warmbandes |
-
2006
- 2006-10-30 DE DE502006003832T patent/DE502006003832D1/de active Active
- 2006-10-30 AT AT06123140T patent/ATE432374T1/de active
- 2006-10-30 EP EP06123140A patent/EP1918404B1/de not_active Not-in-force
- 2006-10-30 PL PL06123140T patent/PL1918404T3/pl unknown
- 2006-10-30 ES ES06123140T patent/ES2325963T3/es active Active
-
2007
- 2007-10-24 WO PCT/EP2007/061391 patent/WO2008052920A1/de not_active Ceased
- 2007-10-24 US US12/447,627 patent/US20100065162A1/en not_active Abandoned
- 2007-10-24 JP JP2009533823A patent/JP5350254B2/ja not_active Expired - Fee Related
- 2007-10-24 CN CN2007800393899A patent/CN101528966B/zh not_active Expired - Fee Related
- 2007-10-24 KR KR1020097007486A patent/KR101461584B1/ko not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470529A (en) * | 1994-03-08 | 1995-11-28 | Sumitomo Metal Industries, Ltd. | High tensile strength steel sheet having improved formability |
| US6284063B1 (en) * | 1996-07-12 | 2001-09-04 | Thyssen Stahl Ag | Hot-rolled steel strip and method of making it |
| US6328826B1 (en) * | 1999-07-30 | 2001-12-11 | Usinor | Method of fabricating “TRIP” steel in the form of thin strip, and thin strip obtained in this way |
| US6852180B1 (en) * | 1999-09-24 | 2005-02-08 | Usinor | Method for making carbon steel bands, in particular packaging steel bands, and resulting bands |
| US7093342B2 (en) * | 2000-05-26 | 2006-08-22 | Castrip Llc | Hot rolling thin strip |
| US20030219621A1 (en) * | 2000-10-19 | 2003-11-27 | Nkk Corporation | Galvanized steel sheet, method for manufacturing the same, and method for manufacturing press-formed product |
| US20030145911A1 (en) * | 2001-06-13 | 2003-08-07 | Harald Hoffmann | Highly stable, steel and steel strips or steel sheets cold-formed, method for the production of steel strips and uses of said steel |
| US20040000633A1 (en) * | 2002-06-28 | 2004-01-01 | Casper Bryan K. | Optical receiver circuit, method, and system |
| WO2005087965A1 (ja) * | 2004-03-11 | 2005-09-22 | Nippon Steel Corporation | 成形性および穴拡げ性に優れた溶融亜鉛めっき複合高強度鋼板およびその製造方法 |
| US20070190353A1 (en) * | 2004-03-11 | 2007-08-16 | Hirokazu Taniguchi | Hot dip galvanized composite high strength steel sheet excellent in shapeability and hole enlargement ability and method of production of same |
| US20070144633A1 (en) * | 2004-03-31 | 2007-06-28 | Taro Kizu | High-stiffness high-strength thin steel sheet and method for producing the same |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100186856A1 (en) * | 2005-10-20 | 2010-07-29 | Nucor Corporation | High strength thin cast strip product and method for making the same |
| US10071416B2 (en) | 2005-10-20 | 2018-09-11 | Nucor Corporation | High strength thin cast strip product and method for making the same |
| US20090098408A1 (en) * | 2007-10-10 | 2009-04-16 | Nucor Corporation | Complex metallographic structured steel and method of manufacturing same |
| US8435363B2 (en) | 2007-10-10 | 2013-05-07 | Nucor Corporation | Complex metallographic structured high strength steel and manufacturing same |
| US9157138B2 (en) | 2007-10-10 | 2015-10-13 | Nucor Corporation | Complex metallographic structured high strength steel and method of manufacturing |
| US11193188B2 (en) | 2009-02-20 | 2021-12-07 | Nucor Corporation | Nitriding of niobium steel and product made thereby |
| US11225697B2 (en) | 2014-12-19 | 2022-01-18 | Nucor Corporation | Hot rolled light-gauge martensitic steel sheet and method for making the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101461584B1 (ko) | 2014-11-13 |
| CN101528966B (zh) | 2011-06-15 |
| JP2010508436A (ja) | 2010-03-18 |
| ES2325963T3 (es) | 2009-09-25 |
| KR20090090302A (ko) | 2009-08-25 |
| PL1918404T3 (pl) | 2009-10-30 |
| CN101528966A (zh) | 2009-09-09 |
| EP1918404A1 (de) | 2008-05-07 |
| DE502006003832D1 (de) | 2009-07-09 |
| EP1918404B1 (de) | 2009-05-27 |
| JP5350254B2 (ja) | 2013-11-27 |
| ATE432374T1 (de) | 2009-06-15 |
| WO2008052920A1 (de) | 2008-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20100043513A1 (en) | Method for manufacturing flat steel products from boron microalloyed multi-phase steel | |
| US20090277546A1 (en) | Method for manufacturing flat steel products from a steel forming a complex phase microstructure | |
| US20100096047A1 (en) | Method for manufacturing flat steel products from a steel forming a martensitic microstructure | |
| US20090010793A1 (en) | Method For Producing High Strength Steel Strips or Sheets With Twip Properties, Method For Producing a Component and High-Strength Steel Strip or Sheet | |
| JP6992070B2 (ja) | 非常に良好な成形性を有する焼戻しされた被覆鋼板及びこの鋼板を製造する方法 | |
| EP3464662B1 (en) | Method for producing a twip steel sheet having an austenitic microstructure | |
| US20240344184A1 (en) | Multiphase ultra-high strength hot rolled steel | |
| WO2018036918A1 (de) | Verfahren zur herstellung eines höchstfesten stahlbandes mit verbesserten eigenschaften bei der weiterverarbeitung und ein derartiges stahlband | |
| US20100065161A1 (en) | Method for manufacturing flat steel products from silicon alloyed multi-phase steel | |
| KR20070085757A (ko) | Ｔｗｉｐ 특성을 갖는 고강도 강 스트립 또는 박판 및 직접스트립 주조에 의한 상기 스트립 제조 방법 | |
| US20100065162A1 (en) | Method for Manufacturing Flat Steel Products From Aluminum Alloyed Multi-Phase Steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: THYSSENKRUPP STEEL AG,GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAMMER, BRIGITTE, DR.;HELLER, THOMAS, DR.;SCHMITZ, JOHANN WILHELM, DR.;AND OTHERS;SIGNING DATES FROM 20090508 TO 20090602;REEL/FRAME:023035/0077 |
|
| STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |