EP3272892A1 - Tôle d'acier laminée à froid à haute résistance et son procédé de fabrication - Google Patents
Tôle d'acier laminée à froid à haute résistance et son procédé de fabrication Download PDFInfo
- Publication number
- EP3272892A1 EP3272892A1 EP16764383.2A EP16764383A EP3272892A1 EP 3272892 A1 EP3272892 A1 EP 3272892A1 EP 16764383 A EP16764383 A EP 16764383A EP 3272892 A1 EP3272892 A1 EP 3272892A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- less
- steel sheet
- rolled steel
- content
- strength 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.)
- Granted
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- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 110
- 239000010959 steel Substances 0.000 claims abstract description 110
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 45
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 229910006639 Si—Mn Inorganic materials 0.000 claims abstract description 28
- 239000002245 particle Substances 0.000 claims abstract description 28
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000013078 crystal Substances 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 57
- 238000005554 pickling Methods 0.000 claims description 49
- 238000000137 annealing Methods 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000005096 rolling process Methods 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 13
- 238000005496 tempering Methods 0.000 claims description 12
- 238000005097 cold rolling Methods 0.000 claims description 9
- 229910052787 antimony Inorganic materials 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 42
- 239000000126 substance Substances 0.000 abstract description 40
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000011572 manganese Substances 0.000 description 32
- 230000000694 effects Effects 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 17
- 239000010936 titanium Substances 0.000 description 14
- 239000010955 niobium Substances 0.000 description 11
- 238000005728 strengthening Methods 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 230000009466 transformation Effects 0.000 description 10
- 239000011575 calcium Substances 0.000 description 9
- 239000011651 chromium Substances 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 238000007670 refining Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000010583 slow cooling Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 150000004767 nitrides Chemical class 0.000 description 6
- 238000010791 quenching Methods 0.000 description 6
- 238000005204 segregation Methods 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910001563 bainite Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- -1 compound carbides Chemical class 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 2
- 229910000165 zinc phosphate Inorganic materials 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 229910052580 B4C Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 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
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910001035 Soft ferrite Inorganic materials 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
- 230000002411 adverse Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000005244 galvannealing Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229940005657 pyrophosphoric acid Drugs 0.000 description 1
- 229910052883 rhodonite Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 229910052841 tephroite Inorganic materials 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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- 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
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- 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
- C21D6/001—Heat treatment of ferrous alloys containing Ni
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- 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
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- 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
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- 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
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- 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
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- 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
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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
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
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- 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
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- 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
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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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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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
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
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- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/081—Iron or steel solutions containing H2SO4
-
- 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
- C21D2211/001—Austenite
-
- 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
- C21D2211/005—Ferrite
-
- 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
-
- 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
Definitions
- the present invention relates to a high-strength cold-rolled steel sheet having a tensile strength (TS) of 1,300 MPa or higher, a good chemical conversion property, and good formability and being useful in applications pertaining to automotive components, and to a method for producing the high-strength cold-rolled steel sheet.
- TS tensile strength
- Steel sheets for automobiles are used after the steel sheets have been painted. Before painting, such steel sheets are treated with chemical conversion such as phosphate conversion. Since chemical conversion of steel sheets is an important treatment to ensure corrosion resistance after painting, steel sheets for automobiles need to have a good chemical conversion property.
- Patent Literature 1 the balance between strength and ductility has been improved by adding a large amount of C.
- addition of a large amount of C leads to a deterioration in stretch flangeability due to a difference in hardness between two phases.
- Patent Literature 3 addition of a large amount of Mn causes Si-Mn compound oxides to be finely dispersed on the surface of a steel sheet and allows the Si-Mn compound oxides to serve as nucleation sites for zinc phosphate crystals, which reduces the amount of SiO 2 on the surface of the steel sheet to as low an amount as possible to ensure the chemical conversion property. It is, however, difficult to obtain a tensile strength of 1,300 MPa and an elongation of 10% or higher when the C content and the Si content are as described in Patent Literature 3.
- an object of the present invention is to provide a high-strength cold-rolled steel sheet having a tensile strength (TS) of 1,300 MPa or higher, a good chemical conversion property, and good formability and to a method for producing the high-strength cold-rolled steel sheet.
- TS tensile strength
- a high-strength cold-rolled steel sheet having a tensile strength (TS) of 1,300 MPa or higher, a good chemical conversion property, and good formability can be produced by pickling a steel sheet that does not contain more Mn than necessary but contains Si and Mn in the range satisfying formula (1) below and that has been continuously annealed after cold rolling, and further re-pickling the steel sheet to remove Si-based oxide on the surface of the steel sheet: Si / Mn ⁇ 0.5 in the formula, [Si] represents the Si content (% by mass), and [Mn] represents the Mn content (% by mass).
- a high-strength cold-rolled steel sheet has a composition including, in terms of % by mass, C: 0.15% or more and 0.22% or less, Si: 1.0% or more and 2.0% or less, Mn: 1.7% or more and 2.5% or less, P: 0.05% or less, S: 0.02% or less, Al: 0.01% or more and 0.05% or less, N: 0.005% or less, and the balance being iron and unavoidable impurities.
- the composition satisfies formula (1) below.
- the steel sheet has a structure including, in terms of area fraction, 60% or more and less than 100% of tempered martensite, 5% or less (inclusive of 0%) of untransformed austenite, and the balance being ferrite.
- the ferrite has an average crystal grain size of less than 3.5 ⁇ m. Less than 10 particles/100 ⁇ m 2 of Si-Mn compound oxide particles having a circle equivalent diameter of 5 ⁇ m or less are present on the surface of the steel sheet. The surface of the steel sheet is covered with Si-based oxide at a coverage of 1% or less.
- the steel sheet has a tensile strength of 1,300 MPa or higher: Si / Mn ⁇ 0.5 in the formula, [Si] represents the Si content (% by mass), and [Mn] represents the Mn content (% by mass).
- the high-strength cold-rolled steel sheet according to the first embodiment has the composition further including, in terms of % by mass, Ti: 0.010% or more and 0.020% or less.
- the high-strength cold-rolled steel sheet according to any one of the first to third embodiments has the composition further including, in terms of % by mass, B: 0.0002% or more and 0.0020% or less.
- the high-strength cold-rolled steel sheet according to any one of the first to fourth embodiments has the composition further including, in terms of % by mass, at least one selected from V: 0.01% or more and 0.30% or less, Mo: 0.01% or more and 0.30% or less, and Cr: 0.01% or more and 0.30% or less.
- the high-strength cold-rolled steel sheet according to any one of the first to sixth embodiments has the composition further including, in terms of % by mass, at least one selected from Sn: 0.001% or more and 0.100% or less, Sb: 0.001% or more and 0.100% or less, Ca: 0.0002% or more and 0.0100% or less, W: 0.01% or more and 0.10% or less, Co: 0.01% or more and 0.10% or less, and REM: 0.0002% or more and 0.0050% or less.
- a method for producing a high-strength cold-rolled steel sheet includes: heating a steel having the composition according to any one of the first to seventh embodiments to a temperature of 1,200 °C or higher, then performing hot rolling at a finish rolling delivery temperature equal to or higher than 800 °C, performing coiling at a temperature of 450 °C or higher and 700 °C or lower, and performing cold rolling; then performing an annealing treatment that involves performing heating to an annealing temperature of Ac 1 point or higher and Ac 3 point or lower where a holding time in a temperature range from Ac 1 point to Ac 3 point is 30 seconds or longer and 1,200 seconds or shorter, performing primary cooling from the annealing temperature to a primary cooling finishing temperature equal to or higher than 600 °C at an average cooling rate below 100 °C/s, and performing secondary cooling to a secondary cooling finishing temperature equal to or lower than 100 °C at an average cooling rate of 100 °C/s or higher and 1,000 °C/s or lower; then performing a tempering
- the re-pickling uses, as a pickling solution, a non-oxidizing acid, which is different from a pickling solution used in the pickling.
- high-strength cold-rolled steel sheet refers to a cold-rolled steel sheet having a tensile strength (TS) of 1,300 MPa or higher.
- the present invention provides a high-strength cold-rolled steel sheet having a tensile strength of 1,300 MPa or higher, a good chemical conversion property, and good formability. Since the high-strength cold-rolled steel sheet of the present invention has a tensile strength of 1,300 MPa or higher and has a good chemical conversion property and good formability, the steel sheet of the present invention can be preferably used in applications pertaining to automotive parts and the like and offers significant advantageous effects of, for example, reducing the weight of automotive parts and improving the reliability thereof.
- Carbon (C) is an element effective in improving the balance between the strength and ductility of the steel sheet. At a C content below 0.15%, it is difficult to ensure a tensile strength of 1,300 MPa or higher. At a C content exceeding 0.22%, coarse cementite is precipitated, which degrades formability such as stretch flangeability.
- the C content is therefore in the range of 0.15% or more and 0.22% or less.
- the C content is preferably 0.16% or more.
- the C content is preferably 0.20% or less.
- Silicon (Si) is an element effective in ensuring strength without significantly reducing the ductility of the steel sheet. At a Si content below 1.0%, a steel sheet having high strength and high formability cannot be produced. At a Si content exceeding 2.0%, pickling and subsequent re-pickling still fail to completely remove Si oxide on the surface of the steel sheet, which results in a poor chemical conversion property.
- the Si content is therefore in the range of 1.0% or more and 2.0% or less.
- the Si content is preferably 1.0% or more.
- the Si content is preferably 1.5% or less.
- Mn 1.7% or more and 2.5% or less
- [Si] represents the Si content (% by mass)
- [Mn] represents the Mn content (% by mass).
- Si-based oxide and Si-Mn compound oxides produced depend on the balance between Si and Mn. If one oxide is produced in a much larger amount than the other oxide, pickling and subsequent re-pickling still fail to completely remove the oxides on the surface of the steel sheet, which results in a poor chemical conversion property. It is thus necessary to specify the quantitative ratio of Si to Mn. If the Mn content is much larger than the Si content, that is, [Si]/[Mn] ⁇ 0.5, excessive amounts of Si-Mn-based oxides (Si-Mn compound oxides) are produced and as a result, the chemical conversion property intended in the present invention is not obtained. Therefore, [Si]/[Mn] ⁇ 0.5.
- Phosphorus (P) is an impurity element and needs to be reduced in amount because it degrades ductility. At a P content exceeding 0.05%, grain boundary embrittlement associated with segregation of P to austenite grain boundaries during casting degrades local ductility. As a result, the balance between strength and ductility is impaired.
- the P content is therefore 0.05% or less.
- the P content is preferably 0.02% or less.
- Al 0.01% or more and 0.05% or less
- Aluminum (Al) has an effect of improving ductility by forming Al oxide to reduce the amount of oxides such as Si oxide. However, a significant effect is not obtained at an Al content below 0.01%. If Al is added in an excess amount exceeding 0.05%, Al combines with N to form a nitride. This nitride is precipitated at austenite grain boundaries during casting to cause grain boundary embrittlement, which degrades stretch flangeability.
- the Al content is therefore in the range of 0.01% or more and 0.05% or less.
- N Nitrogen
- Al and Ti These nitrides degrade stretch flangeability as described above.
- Ti nitride and Al nitride significantly degrade stretch flangeability, and an increased amount of a solid solution of N leads to a considerable reduction in elongation.
- the N content is therefore 0.005% or less.
- the N content is preferably 0.002% or less.
- Nb 0.02% or more and 0.10% or less
- B Boron
- C,B boron carbide Fe 23
- the steel sheet preferably further includes at least one selected from V: 0.01% or more and 0.30% or less, Mo: 0.01% or more and 0.30% or less, and Cr: 0.01% or more and 0.30% or less.
- V 0.01% or more and 0.30% or less
- the steel sheet preferably further includes at least one selected from Cu: 0.01% or more and 0.30% or less and Ni: 0.01% or more and 0.30% or less.
- Both Sn and Sb have an effect of suppressing surface oxidation, decarburization, and nitridization, and thus Sn and Sb may be added as desired. However, this effect is small at a Sn content below 0.001% and a Sb content below 0.001%. This effect is saturated at a Sn content exceeding 0.100% and a Sb content exceeding 0.100%. Therefore, the Sn content, if added, is 0.001% or more and 0.100% or less, and the Sb content, if added, is 0.001% or more and 0.100% or less.
- the Sn content is preferably 0.005% or more, and the Sb content is preferably 0.005% or more.
- the Sn content is preferably 0.010% or less, and the Sb content is preferably 0.010% or less.
- the steel sheet contains, in terms of area fraction, 60% or more and less than 100% of tempered martensite, 5% or less (inclusive of 0%) of untransformed austenite, and the balance being ferrite.
- the ferrite has an average crystal grain size of less than 3.5 ⁇ m.
- the ferrite has an average crystal grain size of 3.5 ⁇ m or more, crystal grain refining strengthening is not enough to obtain a predetermined strength. During deformation, variations in deformation between crystal grains tend to be generated, which degrades formability. Threrefore, the average crystal grain size of ferrite is less than 3.5 ⁇ m.
- the number of Si-Mn compound oxide particles having a circle equivalent diameter of 5 ⁇ m or less can be determined by the method of Examples described below.
- the surface refers to a region extending in the thickness direction from the surface layer to a depth corresponding to 3% of the thickness.
- the finish rolling delivery temperature is 800 °C or higher, a hot-rolled uniform matrix phase structure can be obtained. If the finish rolling delivery temperature is below 800 °C, the steel sheet has an uneven structure, and there is an increased risk of low ductility and various defects formed during forming. Therefore, the finish rolling delivery temperature is 800 °C or higher.
- the upper limit of the finish rolling delivery temperature is not limited, but is preferably 1,000 °C or lower because rolling the steel at an excessively high temperature produces scale defects and the like.
- the annealing temperature is preferably 780 °C or higher. If the holding time at the annealing temperature is too short, the microstructure is not annealed well, which provides an uneven structure including the deformation structure formed by cold rolling and thus results in low ductility. However, if the holding time is too long, this holding time is not desirable because of long production time and high production costs. Therefore, the holding time is 30 to 1,200 seconds. A preferred lower limit of the holding time is 150 seconds. A preferred upper limit is 600 seconds.
- Tempering is preferably performed in the range of 150 °C to 250 °C. If the holding time is shorter than 120 seconds, martensite is softened insufficiently in the temperature range from 100 °C to 300 °C, so that the effect of improving formability cannot be expected. If the holding time is longer than 1,800 seconds, this holding time is not desirable because martensite is softened to an excessive degree so as to significantly reduce the strength and a long re-heating time increases the production costs.
- the re-pickling remove Si oxide and Si-Mn oxides on the surface of the steel sheet and improve the chemical conversion property.
- the re-pickling preferably uses, as a pickling solution, a non-oxidizing acid, which is different from a pickling solution used in the pickling.
- an acid mixture of 0.1 to 50 g/L of hydrochloric acid, 0.1 to 150 g/L of sulfuric acid, 0.1 to 20 g/L of hydrochloric acid, and 0.1 to 60 g/L of sulfuric acid can be used preferably.
- the high-strength cold-rolled steel sheet of the present invention having a tensile strength (TS) of 1,300 MPa or higher and having a good chemical conversion property and good formability is produced. Since the high-strength cold-rolled steel sheet of the present invention after annealing has good sheet shape (flatness), the process for correcting the shape of the steel sheet by, for example, rolling and leveler processing is not always needed, but the steel sheet after annealing may be rolled at an elongation rate of about several percent without causing any problem in order to adjust material properties and surface roughness.
- TS tensile strength
- Sample steels A to R each having the composition described in Table 1 were each smelted under vacuum to produce a slab, which was then hot-rolled under the conditions described in Table 2 to produce a hot-rolled steel sheet.
- This hot-rolled steel sheet was pickled to remove surface scale and then cold-rolled (rolling reduction ratio: 60%).
- the steel sheet was then subjected to continuous annealing and the tempering treatment under the conditions described in Table 2 and then subjected to pickling and re-pickling.
- a sample was taken from the steel sheet obtained above and subjected to observation (measurement) of the metallographic structure, a tensile test, and a hole expansion test.
- the number of Si-Mn oxide particles having a circle equivalent diameter of 5 ⁇ m or less and the coverage of Si-based oxide on the surface of the steel sheet were obtained.
- the chemical conversion property was determined. The measurement methods and the calculation methods are described below.
- the metallographic structure was observed as follows: cutting the sample such that the thickness cross section parallel to the rolling direction was targeted for observation, etching the thickness middle area with 1% Nital, and then observing a typical microstructure under a scanning electron microscope (SEM).
- SEM scanning electron microscope
- the volume fraction of two phases was obtained by a point counting method on the basis of the SEM image taken at a magnification of x1,000, and the grain size of each phase was obtained by linear analysis.
- the obtained volume fraction was defined as the area fraction.
- the coverage of Si-based oxide on the surface of the steel sheet was obtained as follows: identifying Si-based oxide in the same method as described above by observing the surface of the steel sheet under a SEM in five fields of view at x1,000 and performing EDX analysis in the five fields of view; and calculating the coverage by a point counting method (a method involving drawing 15 straight lines vertically and 15 straight lines horizontally on the SEM image and calculating the probability of presence of Si-based oxide at intersections (225 points).
- the chemical conversion property was evaluated as follows: performing chemical conversion using a commercial chemical conversion agent (PALBOND PB-L3065 (registered trademark) available from Nihon Parkerizing Co., Ltd.) under the conditions of a bath temperature of 35 °C and a treatment time of 120 seconds; observing the surface of the steel sheet after chemical conversion under a SEM in five fields of view at a magnification of x500; and rating the chemical conversion property as "A” which means good when 95% or more (area fraction) of a chemical-conversion crystal was evenly formed in all five fields of view, and rating the chemical conversion property as "B” which means poor when more than 5% (area fraction) of defects were found at least in one field of view.
- a commercial chemical conversion agent (PALBOND PB-L3065 (registered trademark) available from Nihon Parkerizing Co., Ltd.) under the conditions of a bath temperature of 35 °C and a treatment time of 120 seconds
- Samples No. 13 and No. 14 are Comparative Examples in which the Si content is out of the scope of the present invention.
- Sample No. 13 fails to have a good chemical conversion property because Si oxide is present on the surface of the steel sheet even after the two-step pickling treatment.
- Sample No. 14 fails to have a predetermined elongation.
- Samples No. 20 to No. 22 have an insufficient martensite fraction and thus fail to have a predetermined strength.
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- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
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JP2015054283 | 2015-03-18 | ||
PCT/JP2016/000778 WO2016147549A1 (fr) | 2015-03-18 | 2016-02-16 | Tôle d'acier laminée à froid à haute résistance et son procédé de fabrication |
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EP (1) | EP3272892B1 (fr) |
JP (1) | JP6210175B2 (fr) |
KR (1) | KR101998652B1 (fr) |
CN (1) | CN107429344A (fr) |
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EP3399064A4 (fr) * | 2016-02-18 | 2019-01-09 | JFE Steel Corporation | Tôle en acier laminée à froid hautement résistante |
EP3626849A4 (fr) * | 2017-05-19 | 2020-05-06 | JFE Steel Corporation | Procédé de fabrication d'une tôle d'acier haute résistance à placage au zinc fondu |
EP4001447A4 (fr) * | 2019-08-30 | 2022-06-15 | JFE Steel Corporation | Tôle d'acier, élément et leurs procédés de production |
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US11180835B2 (en) * | 2015-09-25 | 2021-11-23 | Nippon Steel Corporation | Steel sheet |
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EP3725904B1 (fr) * | 2017-12-15 | 2024-03-06 | Nippon Steel Corporation | Tôle d'acier, tôle d'acier revêtue de zinc par immersion à chaud et tôle d'acier revêtue de zinc par immersion à chaud alliée |
EP3748035A4 (fr) * | 2018-03-30 | 2021-04-07 | JFE Steel Corporation | Tôle d'acier laminée à froid, procédé de production associé et tôle d'acier pour recuit |
JP7006774B2 (ja) | 2018-11-09 | 2022-01-24 | Jfeスチール株式会社 | ジルコニウム系化成処理用冷延鋼板およびその製造方法ならびにジルコニウム系化成処理鋼板およびその製造方法 |
KR102488156B1 (ko) * | 2019-01-09 | 2023-01-16 | 제이에프이 스틸 가부시키가이샤 | 고강도 냉연 강판 및 그 제조 방법 |
JP6954339B2 (ja) * | 2019-02-04 | 2021-10-27 | Jfeスチール株式会社 | 冷延鋼板及びその製造方法 |
CN110129670B (zh) * | 2019-04-25 | 2020-12-15 | 首钢集团有限公司 | 一种1300MPa级高强高塑性热冲压用钢及其制备方法 |
MX2021015578A (es) * | 2019-06-28 | 2022-01-24 | Nippon Steel Corp | Lamina de acero. |
WO2022018481A1 (fr) * | 2020-07-20 | 2022-01-27 | Arcelormittal | Tôle d'acier laminée à froid et traitée thermiquement et procédé de fabrication de celle-ci |
WO2022168167A1 (fr) * | 2021-02-02 | 2022-08-11 | 日本製鉄株式会社 | Tôle d'acier mince |
KR20230081744A (ko) * | 2021-11-29 | 2023-06-08 | 주식회사 포스코 | 연신율이 우수한 초고강도 냉연강판 및 이의 제조방법 |
CN115044831B (zh) * | 2022-06-09 | 2023-08-25 | 包头钢铁(集团)有限责任公司 | 一种1100MPa级冷轧马氏体钢及其制造方法 |
CN115505840A (zh) * | 2022-08-25 | 2022-12-23 | 包头钢铁(集团)有限责任公司 | 一种高强度淬火配分钢及其生产方法 |
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JP4461112B2 (ja) * | 2006-03-28 | 2010-05-12 | 株式会社神戸製鋼所 | 加工性に優れた高強度鋼板 |
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WO2013129295A1 (fr) * | 2012-02-28 | 2013-09-06 | Jfeスチール株式会社 | Tôle d'acier laminée à froid, à haute résistance et contenant du si, procédé de production associé et élément de véhicule |
JP5829977B2 (ja) * | 2012-06-05 | 2015-12-09 | 株式会社神戸製鋼所 | 降伏強度と成形性に優れた高強度冷延鋼板およびその製造方法 |
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- 2016-02-16 WO PCT/JP2016/000778 patent/WO2016147549A1/fr active Application Filing
- 2016-02-16 CN CN201680016385.8A patent/CN107429344A/zh active Pending
- 2016-02-16 KR KR1020177025309A patent/KR101998652B1/ko active IP Right Grant
- 2016-02-16 US US15/556,448 patent/US20180037969A1/en not_active Abandoned
- 2016-02-16 MX MX2017011825A patent/MX2017011825A/es unknown
- 2016-02-16 JP JP2017506047A patent/JP6210175B2/ja active Active
- 2016-02-16 EP EP16764383.2A patent/EP3272892B1/fr active Active
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3399064A4 (fr) * | 2016-02-18 | 2019-01-09 | JFE Steel Corporation | Tôle en acier laminée à froid hautement résistante |
US11085099B2 (en) | 2016-02-18 | 2021-08-10 | Jfe Steel Corporation | High-strength cold-rolled steel sheet |
EP3626849A4 (fr) * | 2017-05-19 | 2020-05-06 | JFE Steel Corporation | Procédé de fabrication d'une tôle d'acier haute résistance à placage au zinc fondu |
US11248277B2 (en) | 2017-05-19 | 2022-02-15 | Jfe Steel Corporation | Method for manufacturing high-strength galvanized steel sheet |
EP4001447A4 (fr) * | 2019-08-30 | 2022-06-15 | JFE Steel Corporation | Tôle d'acier, élément et leurs procédés de production |
Also Published As
Publication number | Publication date |
---|---|
KR101998652B1 (ko) | 2019-07-10 |
CN107429344A (zh) | 2017-12-01 |
US20180037969A1 (en) | 2018-02-08 |
EP3272892B1 (fr) | 2019-08-28 |
JP6210175B2 (ja) | 2017-10-11 |
EP3272892A4 (fr) | 2018-01-24 |
JPWO2016147549A1 (ja) | 2017-07-13 |
KR20170116112A (ko) | 2017-10-18 |
WO2016147549A1 (fr) | 2016-09-22 |
MX2017011825A (es) | 2017-12-07 |
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