CN118159678A - 经冷轧和热处理的钢板及其制造方法 - Google Patents
经冷轧和热处理的钢板及其制造方法 Download PDFInfo
- Publication number
- CN118159678A CN118159678A CN202180103795.7A CN202180103795A CN118159678A CN 118159678 A CN118159678 A CN 118159678A CN 202180103795 A CN202180103795 A CN 202180103795A CN 118159678 A CN118159678 A CN 118159678A
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- Prior art keywords
- steel sheet
- cold rolled
- rolled
- cold
- heat treated
- 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.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 118
- 239000010959 steel Substances 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 30
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 22
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 18
- 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
- 238000001816 cooling Methods 0.000 claims description 20
- 239000010960 cold rolled steel Substances 0.000 claims description 17
- 238000000137 annealing Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- 239000011572 manganese Substances 0.000 claims description 13
- 229910052748 manganese Inorganic materials 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910001566 austenite Inorganic materials 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000005496 tempering Methods 0.000 claims description 7
- 238000005098 hot rolling Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 238000005097 cold rolling Methods 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000011265 semifinished product Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 1
- 238000003303 reheating Methods 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 230000001627 detrimental effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910052750 molybdenum Inorganic materials 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000002791 soaking Methods 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 229910052758 niobium Inorganic materials 0.000 description 5
- 239000010955 niobium Substances 0.000 description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 229910001567 cementite Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- HQFCOGRKGVGYBB-UHFFFAOYSA-N ethanol;nitric acid Chemical compound CCO.O[N+]([O-])=O HQFCOGRKGVGYBB-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000004881 precipitation hardening Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007571 dilatometry Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000445 field-emission scanning electron microscopy Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 229910001568 polygonal ferrite Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/22—Martempering
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
-
- 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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
-
- 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
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
-
- 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
- C23C2/26—After-treatment
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Abstract
经冷轧和热处理的钢板,其包含以下元素:0.2%≦C≦0.35%;0.2%≦Mn≦1.2%;0.1%≦Si≦0.9%;0%≦Al≦0.1%;0.2%≦Cr≦0.8%;0.01%≦Nb≦0.1%;0.1%≦Ni≦0.9%;0.1%≦Mo≦0.9%;0.01%≦Ti≦0.1%;0%≦P≦0.02%;0%≦S≦0.03%;0%≦N≦0.09%;0.0001%≦B≦0.010%;0%≦V≦0.1%;0%≦Cu≦2%;0%≦Ca≦0.005%;0%≦Ce≦0.1%;0%≦Mg≦0.05%;0%≦Zr≦0.05%;剩余部分组成由铁和因加工引起的不可避免的杂质构成,所述钢的显微组织按面积百分比计包含至少75%的回火马氏体、0%至10%的新鲜马氏体、3%至20%的铁素体和0%至5%的贝氏体。
Description
技术领域
本发明涉及冷轧钢板,其适合用作车辆用钢板。
背景技术
汽车部件需要满足两个相矛盾的需求,即,易于成形和强度,但是近年来,考虑到全球环境问题,还给予汽车改善燃料消耗的第三个要求。因此,现在汽车部件必须由具有高可成形性的材料制成,以便符合复杂汽车组件的易于装配的标准,并且同时必须针对车辆耐撞性和耐久性而提高强度同时减轻车辆的重量以改善燃料效率,此外,钢部件必须是可焊接的,同时不会遭受液态金属脆化。
因此,投入了大量的研究和开发努力以通过增加材料的强度来减少汽车中使用的材料的量。相反地,钢板强度的增加使可成形性降低,并因此必须开发具有高强度和高可成形性二者的材料。
高强度和高可成形性钢板领域中的早期研究和开发已经产生了数种用于生产高强度和高可成形性钢板的方法,本文列举了其中的一些用于明确理解本发明:
EP3486346提出了具有特定化学组成的钢板和用于生产该钢板的方法。所述钢板具有包含马氏体和贝氏体的显微组织。相对于整个显微组织马氏体和贝氏体的总面积分数为95%或更大且100%或更小。显微组织的剩余部分为铁素体和残余奥氏体中的至少一者。显微组织包括特定的夹杂物簇,显微组织中夹杂物簇的含量为5簇/mm2或更少。显微组织包括平均尺寸大于5μm的原奥氏体晶粒。钢板的抗拉强度为1320MPa或更大。然而,EP3486346的钢不能达到2.5t或更小的弯曲度。
与高强度和高可成形性钢板的制造有关的已知现有技术遭受一个或另一个缺陷影响,因此需要强度大于1500MPa的冷轧钢板及其制造方法。
发明内容
本发明的目的是通过使得可获得同时具有以下的经冷轧和热处理的钢板来解决这些问题:
-大于或等于1500MPa并且优选高于1600MPa的极限抗拉强度,
-大于或高于1100MPa并且优选高于1130MPa的屈服强度,
-6%或更大的总延伸率,
-10%或更大的扩孔率,
当测量90°V弯曲时2.5t或更小的弯曲度。
在一个优选的实施方案中,经冷轧和热处理的钢板显示出大于0.60的YS/TS比。
优选地,这样的钢还可以具有对于成形,特别是对于轧制而言良好的适应性以及良好的可焊性和可涂覆性。
本发明的另一个目的还在于使得可获得与常规工业应用相容同时对制造参数变化稳健的用于制造这些板的方法。
本发明的经冷轧热处理的钢板可以任选地用锌或锌合金涂覆,或者用铝或铝合金涂覆,以改善其耐蚀性。
本发明的其他特征和优点将根据本发明的以下详细描述而变得明显。
具体实施方式
钢中存在0.2%至0.35%的碳。碳是通过使退火之后的冷却期间铁素体和贝氏体的形成延迟来提高钢板的强度所必需的元素。小于0.2%的含量将无法使本发明的钢具有足够的抗拉强度以及延性。另一方面,在碳含量超过0.35%时,焊接区和热影响区显著硬化,并因此损害焊接区的机械特性。碳的优选限度为0.22%至0.35%,并且更优选的限度为0.22%至0.34%。
本发明的钢的锰含量为0.2%至1.2%。锰为赋予强度的元素,并且需要至少0.2%的量的锰以通过延迟铁素体的形成来提供钢板的强度和淬透性。因此,锰的百分比例如0.3%至1.1%是优选的,并且更优选0.4%至1%。但是当锰多于1.2%时,这产生诸如使奥氏体向马氏体的转变减缓,从而导致最终产品中延性降低的不利影响。此外,锰含量高于1.2%将造成中心偏析并且还降低本发明钢的可焊性。此外,就氢延迟断裂而言,高锰含量是有害的,氢延迟断裂对于钢制造商和汽车工业是重要标准。
本发明的钢的硅含量为0.1%至0.9%。硅是通过固溶强化而有助于提高强度的元素。硅是可以阻碍在退火之后的冷却期间碳化物析出的成分,因此,硅促进马氏体的形成。但硅也是铁素体形成元素,并且还使Ac3转变点提高,这将退火温度推向更高的温度范围,这是将硅的含量保持在最大0.9%的原因。高于0.9%的硅含量还可能回火脆化并且此外硅也损害可涂覆性。硅的存在的优选限度为0.2%至0.8%,并且更优选为0.3%至0.7%。
本发明的钢的铝的含量为0%至0.1%。在炼钢期间可以添加铝用于使钢脱氧以捕获氧。高于0.1%将提高Ac3点,从而降低生产率。此外,在这样的范围内,铝与钢中的氮结合以形成氮化铝,从而使晶粒的尺寸减小,并且铝还延迟渗碳体的析出,然而铝在本发明中铝的含量超过0.1%时,氮化铝的量和尺寸有害于扩孔和弯曲,并且还将Ac3推向更高的温度范围(要达到这样的温度范围在工业上是非常昂贵的),并且还导致退火均热期间的晶粒粗化。铝的优选限度为0%至0.06%,并且更优选为0%至0.05%。
铬为本发明的钢的必需元素,以0.2%至0.8%存在。铬为钢提供强度和硬化,但是当以高于0.8%使用时,损害钢的表面光洁度。铬的优选限度为0.2%至0.7%,并且更优选为0.2%至0.6%。
铌为必需元素,并且可以以0.01%至0.1%,优选以0.01%至0.09%,并且更优选以0.01%至0.07%存在。铌适合于通过在退火均热温度范围期间的析出硬化来形成碳氮化物以赋予根据本发明的钢以强度,这导致产品的硬化。然而,当铌含量高于0.1%时,铌由于形成大量的碳氮化物而消耗碳,这对于本发明是不利的,因为大量的碳氮化物倾向于使钢的延性降低。
镍为必需元素,并且以0.1%至0.9%的量存在以提高本发明钢的强度并改善其韧性。优选最少0.01%来获得这样的效果。镍的优选限度为0.2%至0.7%,并且更优选为0.3%至0.6%。
钼是必需元素,并且以0.01%至0.9%存在于本发明的钢中;当以至少0.01%的量添加时,钼在改善淬透性和硬度方面起着有效作用,使退火之后的冷却期间铁素体和贝氏体的形成延迟。Mo还有益于热轧产品的韧性,使得更容易制造。然而,钼的添加使合金元素的添加成本过度增加,因此出于经济原因将其含量限制到0.9%。钼的优选限度为0.01%至0.7%,并且更优选为0.01%至0.6%。
钛为以0.01%至0.1%,优选以0.01%至0.09%添加到本发明的钢中的必需元素。钛适合于形成碳化物、氮化物和碳氮化物以通过在退火均热温度范围期间的析出硬化来赋予根据本发明的钢以强度,因此实现了产品的硬化。然而,当钛含量高于0.1%时,钛由于形成大量析出物而消耗碳,这对于本发明是不利的,因为大量的析出物倾向于使钢的延性降低。钛的优选限度为0.01%至0.08%,并且更优选为0.01%至0.06%。
将本发明的钢的磷含量限制到0.02%。磷为在固溶体中硬化的元素。因此,至少0.002%的少量的磷可以是有利的,但是磷也具有其不利影响,例如特别是由于其在晶界处偏析或者与锰共偏析的倾向而使可点焊性和热延性降低。出于这些原因,优选将其含量限制到最大0.015%。
硫不是必需元素,但是可以作为杂质包含在钢中。从制造成本的角度出发,硫含量优选地尽可能低,而且为0.03%或更少,并且优选地至多0.005%。此外,如果钢中存在较高的硫,则其尤其与Mn和Ti结合以形成硫化物,这有害于本发明的钢的弯曲、扩孔和延伸率。
氮被限制到0.09%以避免材料的老化并且以使凝固期间对钢的机械特性有害的氮化物的析出最小化。
硼为任选元素,其可以以0%至0.010%,优选0.001%至0.004%添加以使钢硬化。硼捕获氮化物形成氮化硼,这赋予本发明的钢以强度。硼还赋予本发明的钢以淬透性。然而,当硼添加多于0.010%时,发现钢板的可轧制性显著降低。此外,可能在晶界处发生硼偏析,这对可成形性有害。
钒为任选元素,其可以以0%至0.1%,优选以0.001%至0.1%添加到本发明的钢中。与铌一样,其参与到碳氮化物中,因此在硬化中起作用。但是其也参与形成铸造产品凝固期间出现的VN。V的量因此被限制到0.1%,以避免对扩孔有害的粗VN。在钒含量低于0.001%的情况下,其对本发明的钢不产生任何影响。
铜可以作为任选元素以0%至2%的量添加以提高本发明钢的强度并改善其耐蚀性。优选最少0.01%来获得这样的效果。然而,当其含量高于2%时,其可能使表面外观劣化。
钙为任选元素,其可以以0%至0.005%,优选以0.001%至0.005%添加到本发明的钢中。钙作为任选元素尤其是在夹杂物处理期间添加到本发明的钢中。钙通过在对钢进行球化处理时捕获有害的硫含量而有助于钢的精炼。
诸如铈、镁或锆的其他元素可以以如下比例单独添加或者组合添加:Ce≤0.1%,Mg≤0.05%以及Zr≤0.05%。直至所示的最大含量水平,这些元素使得能够细化凝固期间的夹杂物晶粒。
钢的组成的剩余部分由铁和因加工产生的不可避免的杂质构成。
根据本发明的钢板的显微组织按面积分数计包含至少75%的回火马氏体、3%至20%的铁素体、0%至5%的贝氏体、0%至10%的新鲜马氏体。
显微组织中的相的表面分数通过以下方法来确定:从钢板中切割试样,抛光并用本身已知的试剂进行蚀刻,以露出显微组织。之后通过扫描电子显微镜,例如用具有场发射枪的扫描电子显微镜(“FEG-SEM”)在大于5000x的放大倍数下以二次电子模式检测截面。
铁素体的分数的确定在硝酸乙醇腐蚀液(Nital)或苦味酸/硝酸酒精溶液(Picral/Nital)试剂蚀刻之后由SEM观察来进行。
根据S.M.C.Van Bohemen和J.Sietsma在Metallurgical and materialstransactions,第40A卷,2009年5月-1059中的出版物,通过膨胀测定法研究进行马氏体或回火马氏体分数的确定。
回火马氏体构成显微组织的按面积分数计至少75%。回火马氏体由在退火之后的冷却期间,特别是在低于Ms温度并且更特别地低于Ms-10℃之后形成的马氏体形成。然后在180℃至320℃的回火温度T回火下保持期间对这样的马氏体进行回火。本发明的回火马氏体赋予这样的钢以延性和强度。优选地,回火马氏体的含量为75%至95%,并且更优选为78%至90%。
铁素体构成本发明的钢的显微组织的按面积分数计3%至20%。铁素体赋予本发明的钢以强度以及延伸率。本发明钢的铁素体可以包括多边形铁素体、板条铁素体、针状铁素体、板状铁素体或外延铁素体。本发明的铁素体在退火之后进行的冷却期间形成。但每当铁素体含量以高于20%存在于本发明的钢中时,由于铁素体使与硬相(例如回火马氏体、马氏体和贝氏体)的硬度差距增加,并使局部延性降低,导致总延伸率和屈服强度劣化的事实,因此不可能同时具有屈服强度和总延伸率二者。本发明的铁素体存在的优选限度为5%至20%,并且更优选为5%至15%。
贝氏体以0%至5%的量包含在内,在本发明的框架内,贝氏体可以包含无碳化物贝氏体和/或板条贝氏体和粒状贝氏体。当存在时,板条贝氏体呈厚度为1微米至5微米的板条的形式。当存在时,无碳化物贝氏体为这样的贝氏体:其具有非常低的碳化物密度,低于每100μm2的面积单位100个碳化物,并且可能包含奥氏体岛。当存在时,粒状贝氏体呈晶粒形式,其中碳化物存在于晶粒内部。贝氏体提供改善的延伸率。贝氏体的优选存在为0%至3%。
新鲜马氏体构成显微组织的按面积分数计0%至10%。本发明的钢由于冷轧钢板过时效保持之后的冷却而形成新鲜马氏体。马氏体赋予本发明的钢以延性和强度。然而,当新鲜马氏体存在高于10%时,其赋予过量的强度但使延伸率减少而超出本发明的钢可接受的限度。由于新鲜马氏体包含高含量的碳,因此其又脆又硬,因此本发明钢的新鲜马氏体的优选限度为0%至8%,并且更优选为0%至6%。
在不损害钢板的机械特性的情况下,除上述显微组织之外,经冷轧和热处理的钢板的显微组织不含诸如珠光体、渗碳体和残余奥氏体的显微组织组分。
根据本发明的冷轧钢板可以通过任何合适的方法来生产。优选的方法包括提供具有根据本发明的化学组成的钢的半成品铸件。所述铸件可以制作为铸锭或者连续地制作成薄板坯或薄带的形式,即,厚度范围为约220mm(对于板坯)直至数十毫米(对于薄带)。
例如,板坯将被认为是半成品。具有上述化学组成的板坯通过连铸来制造,其中板坯优选地在铸造期间经历直接轻压下,以确保中心偏析的消除和孔隙率降低。通过连铸过程提供的板坯可以在连铸之后直接在高温下使用,或者可以首先冷却至室温然后再加热用于热轧。
经受热轧的板坯的温度优选地为至少1000℃,优选高于1150℃,并且必须低于1300℃。在板坯的温度低于1150℃的情况下,对轧机施加过大的负荷,此外,钢的温度在精轧期间可能降低至铁素体转变温度,从而钢将在组织中包含转变铁素体的状态下被轧制。此外,该温度不得高于1300℃,因为这在工业上是昂贵的。
板坯的温度优选足够高,使得热轧可以完全在奥氏体范围内完成,将终轧热轧温度保持高于850℃。终轧必须在高于850℃下进行,因为低于该温度,钢板表现出可轧制性的显著下降。
然后将以这种方式获得的板以至少5℃/秒的冷却速率冷却至低于或等于560℃的温度。优选地,冷却速率小于或等于100℃/秒且高于10℃/秒。此后,将热轧钢板在560℃至500℃、并且优选500℃至550℃、并且更优510℃至540℃的卷取温度下卷取。此后,使经卷取的热轧钢板冷却,优选冷却至室温。然后,可以使热轧钢板经受任选的氧化皮去除过程例如酸洗,以除去在热轧期间形成的氧化皮,并且确保在使热轧钢板经受任选的热带退火之前在热轧钢板的表面上没有氧化皮。
可以使热轧板经受任选的在350℃至750℃的温度下1小时至96小时的时间的热带退火。选择这样的热带退火的温度和时间以确保热轧钢板的软化,以促进热轧钢板的冷轧。然后,可以使热轧板经受任选的氧化皮去除过程,例如酸洗,以去除热带退火期间形成的氧化皮。
然后将热轧钢板冷却至室温,此后,然后对热轧钢板以35%至90%的厚度压下率进行冷轧以获得冷轧钢板。
然后使冷轧钢板经受退火,以赋予本发明的钢以目标显微组织和机械特性。
在退火中,使冷轧钢板经受加热,其中将冷轧钢板以1℃/秒至30℃/秒的加热速率HR1从室温加热到达到Ac3+10℃至Ac3+150℃的均热温度TA。优选地具有1℃/秒至20℃/秒,并且更优选1℃/秒至10℃/秒的HR1速率。优选的TA温度为800℃至900℃。
然后,将冷轧钢板在退火均热温度TA下保持100秒至1000秒的时间以确保足够的转变以在均热结束时形成至少80%的奥氏体。然后,使冷轧钢板以5℃/秒至200℃/秒,优选8℃/秒至100℃/秒,并且更优选10℃/秒至70℃/秒的平均冷却速率CR1冷却至Ms-150℃至Ms-300℃,并且优选50℃至210℃,并且更优选100℃至210℃的冷却停止温度范围CS1。在该冷却步骤期间,形成本发明的马氏体。如果CS1温度高于Ms-150℃,则本发明的钢具有太多奥氏体,这对于总延伸率是有害的。
然后使冷轧钢板达到180℃至320℃的回火温度TT,并在TT温度下保持1秒至500秒的时间。优选的回火温度TT为190℃至310℃。在该回火步骤期间,冷却步骤期间形成的马氏体进行回火以形成回火马氏体。以这样的方式选择回火的持续时间,使得在回火结束时冷轧钢板中没有残余奥氏体残留。
然后以至少1℃/秒的冷却速率将冷轧钢板冷却至室温以获得经冷轧和热处理的钢板。
然后,所获得的经冷轧热处理的钢板可以任选地通过任何已知方法进行涂覆。可以用锌或基于锌的合金或者用铝或用基于铝的合金进行涂覆。
可以在对产品进行涂覆之后进行任选的后分批退火,优选地在170℃至210℃下进行12小时至30小时的时间,以确保经涂覆产品的脱气。然后冷却至室温以获得经冷轧和涂覆的钢板。
实施例
本文中提供的以下试验和实施例本质上是非限制性的,并且必须仅出于说明的目的而被考虑,并且将显示本发明的有利特征并阐述本发明人在大量实验之后选择的参数的重要性,并进一步确定了可以由根据本发明的钢实现的特性。
用表1中汇总的组成和表2中汇总的工艺参数制备根据本发明和一些比较等级的钢板的样品。这些钢板的相应的显微组织汇总在表3中并且特性汇总在表4中。
表1描述了以重量百分比表示组成的钢,并且还显示了每种钢的Ac3和Ms,Ac3和Ms温度是由Andrews发表在Journal of the Iron and Steel Institute,203,721至727,1965中得到的公式计算的:
Ac3(℃)=910-203×(%℃)^(1/2)-15,2×(%Ni)+44,7×(%Si)+104×(%V)+31,5×(%Mo)+13,1x(%W)-30×(%Mn)-11×(%Cr)-20×(%Cu)+700×(%P)+400×(%Al)+120×(%As)+400×(%Ti).
Ms(℃)=539-423×(%C)-30.4×(%Mn)-12.1×(%Cr)-17.7×(%Ni)-7.5×(%Mo)
表1:试验的组成
表2汇总了对表1的钢实施的退火工艺参数。
此外,在对本发明钢以及参照进行退火处理之前,将样品加热至1150℃至1300℃的温度,并进行热轧。所有试验都以56%的冷轧压下率进行冷轧。
表2:试验的工艺参数
表3汇总了根据标准在不同的显微镜例如扫描电子显微镜上进行以确定试验的显微组织组成的测试的结果。
表3:
从上表中可以看出,根据本发明的试验全部满足显微组织目标。
表4汇总了钢的机械特性和表面特性。
表4:试验的机械特性
屈服强度YS、抗拉强度TS和总延伸率TE根据2009年10月公布的ISO标准ISO6892-1来测量。
Claims (14)
1.一种经冷轧和热处理的钢板,包含以重量百分比表示的以下元素:
0.2%≦C≦0.35%;
0.2%≦Mn≦1.2%;
0.1%≦Si≦0.9%;
0%≦Al≦0.1%;
0.2%≦Cr≦0.8%;
0.01%≦Nb≦0.1%;
0.1%≦Ni≦0.9%;
0.1%≦Mo≦0.9%
0.01%≦Ti≦0.1%;
0%≦P≦0.02%;
0%≦S≦0.03%;
0%≦N≦0.09%;
以及能够包含以下任选的元素中的一者或更多者:
0.0001%≦B≦0.010%;
0%≦V≦0.1%;
0%≦Cu≦2%;
0%≦Ca≦0.005%;
0%≦Ce≦0.1%;
0%≦Mg≦0.05%;
0%≦Zr≦0.05%;
剩余部分组成由铁和因加工引起的不可避免的杂质构成,所述钢的显微组织按面积百分比计包含至少75%的回火马氏体、0%至10%的新鲜马氏体、3%至20%的铁素体和0%至5%的贝氏体。
2.根据权利要求1所述的经冷轧和热处理的钢板,其中组成包含0.22%至0.35%的碳。
3.根据权利要求1或2所述的经冷轧和热处理的钢板,其中组成包含0.3%至1.1%的锰。
4.根据权利要求1至权利要求3中任一项所述的经冷轧和热处理的钢板,其中组成包含0%至0.06%的铝。
5.根据权利要求1至4中任一项所述的经冷轧和热处理的钢板,其中组成包含0.2%至0.8%的硅。
6.根据权利要求1至5中任一项所述的经冷轧和热处理的钢板,其中所述经冷轧和热处理的钢板不含残余奥氏体。
7.根据权利要求1至7中任一项所述的经冷轧和热处理的钢板,其中所述回火马氏体为75%至95%。
8.根据权利要求1至8中任一项所述的经冷轧和热处理的钢板,其中所述钢板具有1500MPa或更大的极限抗拉强度和1100MPa或更大的屈服强度。
9.一种生产经冷轧和热处理的钢板的方法,包括以下顺序步骤:
-提供根据权利要求1至5中任一项的钢组成;
-将所述半成品再加热到1000℃至1300℃的温度;
-在奥氏体范围内对所述半成品进行轧制以获得热轧钢板,其中热轧终轧温度高于850℃;
-将所述钢板以至少5℃/秒的冷却速率冷却至低于或等于560℃的卷取温度;以及对所述热轧钢板进行卷取;
-将所述热轧板冷却至室温;
-任选地对所述热轧钢板进行氧化皮去除过程;
-任选地能够对热轧钢板进行退火;
-任选地对所述热轧钢板进行氧化皮去除过程;
-以35%至90%的压下率对所述热轧钢板进行冷轧以获得冷轧钢板;
-然后将所述冷轧钢板以1℃/秒至30℃/秒的加热速率HR1从室温开始加热到Ac3+10℃至Ac3+150℃的温度TA,其中将其保持100秒至1000秒的时间,
-然后将所述冷轧钢板以5℃/秒至200℃/秒的冷却速率CR1从TA开始冷却至Ms-150℃至Ms-300℃的温度CS1;
-然后使所述冷轧钢板达到180℃至320℃的回火温度TT,其中将其保持1秒至500秒的时间;
-然后以至少1℃/秒的冷却速率冷却至室温以获得经冷轧和热处理的钢板。
10.根据权利要求9所述的方法,其中所述卷取温度为560℃至500℃。
11.根据权利要求9至10中任一项所述的方法,其中CS1为50℃至210℃。
12.根据权利要求9至11中任一项所述的方法,其中TT为190℃至310℃。
13.根据权利要求9至12中任一项所述的方法,其中TA为800℃至900℃。
14.能够根据权利要求1至8中任一项获得的钢板或能够根据权利要求9至13中任一项所述的方法制造的钢板用于制造车辆的结构部件的用途。
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