EP1558769A1 - Method for making hardenable steel plates by firing, resulting steel plates - Google Patents
Method for making hardenable steel plates by firing, resulting steel platesInfo
- Publication number
- EP1558769A1 EP1558769A1 EP03775481A EP03775481A EP1558769A1 EP 1558769 A1 EP1558769 A1 EP 1558769A1 EP 03775481 A EP03775481 A EP 03775481A EP 03775481 A EP03775481 A EP 03775481A EP 1558769 A1 EP1558769 A1 EP 1558769A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel
- weight
- temperature
- less
- sheet
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010304 firing Methods 0.000 title claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000000137 annealing Methods 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 238000005482 strain hardening Methods 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims abstract description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052796 boron Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000005097 cold rolling Methods 0.000 claims abstract description 3
- 238000005098 hot rolling Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 16
- 239000011572 manganese Substances 0.000 claims description 14
- 229910052748 manganese Inorganic materials 0.000 claims description 12
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 230000002045 lasting effect Effects 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims 1
- 238000010422 painting Methods 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 description 12
- 230000032683 aging Effects 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000006104 solid solution Substances 0.000 description 4
- 238000007373 indentation Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000003466 welding 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
- 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
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0273—Final recrystallisation annealing
-
- 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
- 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
Definitions
- the present invention relates to a process for manufacturing baking hardening steel sheets, known as "bake hardening”, as well as the steel sheets and pieces obtained by the implementation of this process.
- These sheets and these steel parts may include an anti-corrosion coating, such as that obtained by hot-dip galvanizing or by electrogalvanizing.
- the steel sheets are more particularly intended for the manufacture of appearance parts for the automobile, such as hoods for example, while the parts of greater thickness than the sheets, are more particularly intended for the production of parts of structure for automobile, too.
- the appearance parts for the automobile must be made of a material easy to implement by stamping, having at the end of this implementation good resistance to indentation, and as light as possible so to reduce the consumption of the vehicle.
- a material has good drawability when its elastic limit is low, but good resistance to indentation requires that its elastic limit is high and its thickness important.
- BH steels So-called "bake hardening" steels (also called BH steels) have therefore been developed which have the particularity of having a low yield strength before shaping, which makes them easily stampable. But, once stamped, then coated with paint and subjected to a thermal baking treatment (170 ° C for 20 minutes, for example), it is found that the parts or sheets of BH steels have an elastic limit which has increased considerably, which gives them good resistance to indentation. In the case of structural parts, this hardening property during curing of the coating is in particular used to reduce the thickness, and therefore the weight, of these parts.
- Baking hardenable steels are known, the composition of which comprises manganese and silicon and a significant quantity of phosphorus, around 0.1% by weight. These steels have good mechanical characteristics and a gain in yield strength after firing (BH) of the order of 45 MPa, but have significant natural aging.
- BH yield strength after firing
- the present invention therefore aims to provide steels hardenable by baking having good mechanical characteristics, a gain in yield strength after baking (BH) of at least 40 MPa and which are less sensitive to natural aging than steels of the prior art.
- BH gain in yield strength after baking
- a first object of the present invention consists of a process for the manufacture of steel sheets which can be hardened by firing comprising: - the production of a steel the composition of which comprises, expressed in% by weight:
- the continuous annealing heat treatment comprises:
- the first cooling comprises a first slow part carried out at a speed of less than 10 ° C / s, then a second rapid part carried out at a speed of between 20 and 50 ° C / s.
- the process can also include the following variants, taken individually or in combination:
- the manganese content of the steel is between 0.55 and 0.65% by weight and the silicon content of the steel is between 0.08 and 0.12% by weight
- the manganese content of the steel is between 0.95 and 1.05% by weight and the silicon content of the steel is between 0.16 and 0.20% by weight
- the nitrogen content of the steel is less than 0.005% by weight
- - the phosphorus content of the steel is less than 0.015% by weight.
- the carbon content of the composition according to the invention is between 0.03 and 0.06% by weight, since this element significantly lowers the ductility, it is however necessary to have a minimum of 0.03% by weight to avoid any problem of aging.
- the manganese content of the composition according to the invention must be between 0.50 and 1.10% by weight. Manganese improves the yield strength of steel while greatly reducing its ductility. Below 0.50% by weight, aging problems are observed, while beyond 1.10% by weight, it damages the ductility too much.
- the silicon content of the composition according to the invention must be between 0.08 and 0.20% by weight. It greatly improves the yield strength of steel while slightly reducing its ductility, but increases significantly its tendency to aging.
- the steel does not have good mechanical characteristics, while if it exceeds 0.20% by weight, there are problems with the appearance of surfaces on which appear tigrages.
- the ratio of the manganese content relative to the silicon content is between 4 and 15 in order to avoid any problem of sparking weld brittleness. Indeed, if one places oneself outside these values, one observes the formation of embrittling oxides during this welding operation.
- the main function of boron is to fix nitrogen by early precipitation of boron nitrides.
- the aluminum content of the composition according to the invention is between 0.015 and 0.070% by weight, without being of critical importance.
- Aluminum is present in the grade according to the invention due to the casting process during which this element is added to deoxidize the steel. It is important, however, not to exceed 0.070% by weight, since there would then be problems of inclusion of aluminum oxides, harmful for the mechanical characteristics of the steel.
- Phosphorus is limited in the steel according to the invention to a content of less than 0.035% by weight, preferably less than 0.015% by weight. It increases the elastic limit of the shade, but it also increases its tendency to age in heat treatments, which explains its limitation. It is also harmful for ductility.
- the titanium content of the composition must be less than 0.005% by weight, that of sulfur must be less than 0.015% by weight, that of nickel must be less than 0.040% by weight, that of copper must be less than 0.040% by weight. weight and that in molybdenum must be less than 0.010% by weight.
- These different elements actually constitute the residual elements resulting from the development of the shade that we meet most often. Their contents are limited because they are capable of forming inclusions which reduce the mechanical characteristics of the grade.
- these residual elements may also be niobium, which is not added to the composition, but which can be present in trace amounts, that is to say at a content of less than 0.004%, preferably less than 0.001%, and particularly preferably equal to 0.
- a second object of the invention consists of a baking-hardenable sheet which can be obtained by the process according to the invention and which has an elastic limit between 260 and 360 MPa, a tensile strength between 320 and 460 MPa, a BH2 value greater than 40 MPa, and preferably greater than 60 MPa and an elastic limit plateau less than or equal to 0.2%.
- test piece is therefore subjected to a uniaxial traction of 2%, then a heat treatment of 170 ° C. for 20 minutes.
- Slabs are made from castings 1 to 4, then they are hot rolled at a temperature higher than Ar3. For these castings, the end of rolling temperature is between 854 and 880 ° C. The sheets thus obtained are wound, at a winding temperature between 580 and 620 ° C. for these castings, then they are cold rolled with a reduction rate which varies from 70 to 76%.
- the sheets are then subjected to a continuous annealing which has the following stages: - heating of the sheet until reaching a temperature of
- test pieces are cut from these sheets, and their ReO elastic limits are measured. Then, these test pieces are subjected to a uniaxial tension of 2% and their elastic limits Re2% are measured as well as their other mechanical characteristics. Then, they are subjected to a conventional heat treatment at 170 ° C. for 20 minutes and their new elastic limits ReTT are measured. We then calculate their BH2.
- New test pieces are then cut from the sheets which have undergone continuous annealing, and they are subjected to a heat treatment at 75 ° C. for 10 hours. This heat treatment is equivalent to a natural aging of 6 months at room temperature. The following results are obtained:
- Slabs are made from castings 1 to 5, then they are hot rolled, the end of rolling temperature being 850/880 ° C.
- the sheets thus obtained are wound at a winding temperature of 580/620 ° C, then they are cold rolled with a reduction rate varying from 70/76% for these castings.
- the sheets are then subjected to a continuous annealing which has the following stages: - heating of the sheet until reaching a temperature of
- test pieces are cut from these sheets, and their ReO elastic limits are measured. Then, these test pieces are subjected to a uniaxial tension of 2% and their elastic limits Re2% are measured as well as their other mechanical characteristics. Then, they are subjected to a conventional heat treatment at 170 ° C. for 20 minutes and their new elastic limits ReTT are measured. We then calculate their BH2.
- New test pieces are then cut from the sheets which have undergone continuous annealing, and they are subjected to a heat treatment at 75 ° C. for 10 hours. This heat treatment is equivalent to a natural aging of 6 months at room temperature. The following results are obtained:
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)
- Heat Treatment Of Sheet Steel (AREA)
- Laminated Bodies (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
- Meat, Egg Or Seafood Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0212753 | 2002-10-14 | ||
FR0212753A FR2845694B1 (en) | 2002-10-14 | 2002-10-14 | METHOD FOR MANUFACTURING COOK-CURABLE STEEL SHEETS, STEEL SHEETS AND PIECES THUS OBTAINED |
PCT/FR2003/002985 WO2004035838A1 (en) | 2002-10-14 | 2003-10-10 | Method for making hardenable steel plates by firing, resulting steel plates |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1558769A1 true EP1558769A1 (en) | 2005-08-03 |
EP1558769B1 EP1558769B1 (en) | 2010-06-09 |
Family
ID=32039711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03775481A Expired - Lifetime EP1558769B1 (en) | 2002-10-14 | 2003-10-10 | Method for making hardenable steel plates by firing, resulting steel plates |
Country Status (18)
Country | Link |
---|---|
US (1) | US7540928B2 (en) |
EP (1) | EP1558769B1 (en) |
JP (2) | JP4892190B2 (en) |
KR (1) | KR101044741B1 (en) |
CN (1) | CN100366760C (en) |
AT (1) | ATE470729T1 (en) |
AU (1) | AU2003283507A1 (en) |
BR (1) | BR0315255B1 (en) |
CA (1) | CA2502079C (en) |
DE (1) | DE60332951D1 (en) |
ES (1) | ES2345045T3 (en) |
FR (1) | FR2845694B1 (en) |
MX (1) | MXPA05003938A (en) |
PL (1) | PL200655B1 (en) |
RU (1) | RU2338792C2 (en) |
UA (1) | UA80448C2 (en) |
WO (1) | WO2004035838A1 (en) |
ZA (1) | ZA200502882B (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2845694B1 (en) * | 2002-10-14 | 2005-12-30 | Usinor | METHOD FOR MANUFACTURING COOK-CURABLE STEEL SHEETS, STEEL SHEETS AND PIECES THUS OBTAINED |
JP5376927B2 (en) * | 2008-12-11 | 2013-12-25 | 日新製鋼株式会社 | Manufacturing method of high proportional limit steel plate with excellent bending workability |
WO2012127125A1 (en) * | 2011-03-24 | 2012-09-27 | Arcelormittal Investigatión Y Desarrollo Sl | Hot-rolled steel sheet and associated production method |
RU2466193C1 (en) * | 2011-05-18 | 2012-11-10 | Общество с ограниченной ответственностью "Северсталь-Проект" (ООО "Северсталь-Проект") | Manufacturing method of thick low-alloy rolled plates |
WO2012168564A1 (en) * | 2011-06-07 | 2012-12-13 | Arcelormittal Investigación Y Desarrollo Sl | Cold-rolled steel plate coated with zinc or a zinc alloy, method for manufacturing same, and use of such a steel plate |
UA109963C2 (en) * | 2011-09-06 | 2015-10-26 | CATHANE STEEL, APPROVING CONSEQUENCES OF SEPARATION OF PARTS AFTER HOT FORMING AND / OR CUTTING IN TOOL, THAT HAS A HIGHER MACHINE | |
MX2014003715A (en) * | 2011-09-30 | 2014-07-09 | Nippon Steel & Sumitomo Metal Corp | High-strength hot-dip galvanized steel plate having excellent impact resistance and method for producing same, and high-strength alloyed hot-dip galvanized steel sheet and method for producing same. |
RU2495142C1 (en) * | 2012-06-26 | 2013-10-10 | Общество с ограниченной ответственностью "Северсталь-Проект" (ООО "Северсталь-Проект") | Manufacturing method of rolled steel plate from low-alloy steel |
RU2516212C1 (en) * | 2012-10-18 | 2014-05-20 | Открытое акционерное общество "Магнитогорский металлургический комбинат" | Method to produce hot-rolled wide-strip coil stock |
RU2530078C1 (en) * | 2013-07-23 | 2014-10-10 | Открытое акционерное общество "Северсталь" (ОАО "Северсталь") | Production of thick-sheet rolled stock for ship building |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6047886B2 (en) * | 1981-03-02 | 1985-10-24 | 新日本製鐵株式会社 | Manufacturing method of high-strength thin steel plate for processing by continuous annealing |
JPS5852429A (en) * | 1981-09-19 | 1983-03-28 | Nippon Steel Corp | Continuous annealing method of cold rolling steel plate for working |
US4853032A (en) * | 1987-08-17 | 1989-08-01 | Cargill, Incorporated | Process for producing low carbon steel for cold drawing |
JPH0885827A (en) * | 1994-09-19 | 1996-04-02 | Sumitomo Metal Ind Ltd | Production of cold rolled steel sheet by continuous annealing |
JP3292671B2 (en) * | 1997-02-10 | 2002-06-17 | 川崎製鉄株式会社 | Hot-rolled steel strip for cold-rolled steel sheet with good deep drawability and aging resistance |
DE19622164C1 (en) * | 1996-06-01 | 1997-05-07 | Thyssen Stahl Ag | Cold rolled steel sheet with good drawing properties |
FR2757877B1 (en) * | 1996-12-31 | 1999-02-05 | Ascometal Sa | STEEL AND PROCESS FOR THE MANUFACTURE OF A SHAPED STEEL PART BY COLD PLASTIC DEFORMATION |
DE19701443A1 (en) * | 1997-01-17 | 1998-07-23 | Thyssen Stahl Ag | Cold rolled steel sheet or strip with good formability used for car parts production |
BE1011066A3 (en) * | 1997-03-27 | 1999-04-06 | Cockerill Rech & Dev | Niobium steel and method for manufacturing flat products from it. |
US6171413B1 (en) * | 1997-07-28 | 2001-01-09 | Nkk Corporation | Soft cold-rolled steel sheet and method for making the same |
JPH11310826A (en) * | 1998-04-30 | 1999-11-09 | Nippon Steel Corp | Manufacture of cold rolled steel sheet excellent in cold aging resistance abd workability |
JP3596398B2 (en) * | 2000-01-18 | 2004-12-02 | Jfeスチール株式会社 | Manufacturing method of cold rolled steel sheet with excellent bake hardenability and normal temperature aging resistance |
JP3855678B2 (en) * | 2000-04-28 | 2006-12-13 | 住友金属工業株式会社 | Manufacturing method of thin steel sheet with excellent room temperature aging resistance, workability, and paint bake hardenability |
JP3818024B2 (en) * | 2000-06-15 | 2006-09-06 | Jfeスチール株式会社 | Method for producing soft cold-rolled steel sheet with excellent aging resistance |
FR2820150B1 (en) * | 2001-01-26 | 2003-03-28 | Usinor | HIGH STRENGTH ISOTROPIC STEEL, METHOD FOR MANUFACTURING SHEETS AND SHEETS OBTAINED |
FR2845694B1 (en) * | 2002-10-14 | 2005-12-30 | Usinor | METHOD FOR MANUFACTURING COOK-CURABLE STEEL SHEETS, STEEL SHEETS AND PIECES THUS OBTAINED |
-
2002
- 2002-10-14 FR FR0212753A patent/FR2845694B1/en not_active Expired - Lifetime
-
2003
- 2003-10-10 CA CA2502079A patent/CA2502079C/en not_active Expired - Lifetime
- 2003-10-10 KR KR1020057006315A patent/KR101044741B1/en active IP Right Grant
- 2003-10-10 MX MXPA05003938A patent/MXPA05003938A/en active IP Right Grant
- 2003-10-10 DE DE60332951T patent/DE60332951D1/en not_active Expired - Lifetime
- 2003-10-10 ES ES03775481T patent/ES2345045T3/en not_active Expired - Lifetime
- 2003-10-10 RU RU2005114614/02A patent/RU2338792C2/en active
- 2003-10-10 BR BRPI0315255-3A patent/BR0315255B1/en active IP Right Grant
- 2003-10-10 AT AT03775481T patent/ATE470729T1/en active
- 2003-10-10 CN CNB2003801014069A patent/CN100366760C/en not_active Expired - Lifetime
- 2003-10-10 US US10/531,264 patent/US7540928B2/en active Active
- 2003-10-10 AU AU2003283507A patent/AU2003283507A1/en not_active Abandoned
- 2003-10-10 JP JP2004544367A patent/JP4892190B2/en not_active Expired - Lifetime
- 2003-10-10 UA UAA200504482A patent/UA80448C2/en unknown
- 2003-10-10 EP EP03775481A patent/EP1558769B1/en not_active Expired - Lifetime
- 2003-10-10 WO PCT/FR2003/002985 patent/WO2004035838A1/en active Application Filing
- 2003-10-10 PL PL374746A patent/PL200655B1/en unknown
-
2005
- 2005-04-08 ZA ZA2005/02882A patent/ZA200502882B/en unknown
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2010
- 2010-07-15 JP JP2010160393A patent/JP2011006792A/en active Pending
Non-Patent Citations (1)
Title |
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See references of WO2004035838A1 * |
Also Published As
Publication number | Publication date |
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CA2502079C (en) | 2011-08-09 |
KR20050055006A (en) | 2005-06-10 |
CN1705757A (en) | 2005-12-07 |
FR2845694A1 (en) | 2004-04-16 |
ES2345045T3 (en) | 2010-09-14 |
CA2502079A1 (en) | 2004-04-29 |
PL200655B1 (en) | 2009-01-30 |
CN100366760C (en) | 2008-02-06 |
MXPA05003938A (en) | 2005-06-17 |
ATE470729T1 (en) | 2010-06-15 |
RU2338792C2 (en) | 2008-11-20 |
DE60332951D1 (en) | 2010-07-22 |
US20060157166A1 (en) | 2006-07-20 |
PL374746A1 (en) | 2005-10-31 |
BR0315255A (en) | 2005-08-23 |
AU2003283507A1 (en) | 2004-05-04 |
UA80448C2 (en) | 2007-09-25 |
JP2011006792A (en) | 2011-01-13 |
EP1558769B1 (en) | 2010-06-09 |
ZA200502882B (en) | 2005-12-28 |
JP4892190B2 (en) | 2012-03-07 |
BR0315255B1 (en) | 2011-03-09 |
JP2006503183A (en) | 2006-01-26 |
KR101044741B1 (en) | 2011-06-28 |
FR2845694B1 (en) | 2005-12-30 |
US7540928B2 (en) | 2009-06-02 |
WO2004035838A1 (en) | 2004-04-29 |
RU2005114614A (en) | 2005-10-10 |
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