JP6682661B2 - オーステナイト型マトリックスを有するtwip鋼板の製造方法 - Google Patents
オーステナイト型マトリックスを有するtwip鋼板の製造方法 Download PDFInfo
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- JP6682661B2 JP6682661B2 JP2018561531A JP2018561531A JP6682661B2 JP 6682661 B2 JP6682661 B2 JP 6682661B2 JP 2018561531 A JP2018561531 A JP 2018561531A JP 2018561531 A JP2018561531 A JP 2018561531A JP 6682661 B2 JP6682661 B2 JP 6682661B2
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- annealed
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- cold rolling
- steel sheet
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- 229910000937 TWIP steel Inorganic materials 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 229910001566 austenite Inorganic materials 0.000 title description 6
- 239000011159 matrix material Substances 0.000 title description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 54
- 239000010959 steel Substances 0.000 claims description 54
- 238000000034 method Methods 0.000 claims description 43
- 238000005097 cold rolling Methods 0.000 claims description 41
- 238000000137 annealing Methods 0.000 claims description 25
- 238000001953 recrystallisation Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 11
- 239000012535 impurity Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- 238000005098 hot rolling Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000007747 plating Methods 0.000 claims description 4
- 238000003303 reheating Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000005246 galvanizing Methods 0.000 claims 1
- 239000011572 manganese Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 239000011135 tin Substances 0.000 description 11
- 239000010936 titanium Substances 0.000 description 11
- 239000010955 niobium Substances 0.000 description 10
- 239000011651 chromium Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 9
- 229910052719 titanium Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 8
- 229910052758 niobium Inorganic materials 0.000 description 8
- 229910052804 chromium Inorganic materials 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 229910052748 manganese Inorganic materials 0.000 description 6
- 229910052750 molybdenum Inorganic materials 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 229910052720 vanadium Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000011733 molybdenum Substances 0.000 description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910000617 Mangalloy Inorganic materials 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 229910052580 B4C 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
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 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
- 238000009749 continuous casting Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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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
- 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
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- 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
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- C—CHEMISTRY; METALLURGY
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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
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- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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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
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- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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- C—CHEMISTRY; METALLURGY
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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
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- 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
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- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
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- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0468—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment between cold rolling steps
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
-
- 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
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- C—CHEMISTRY; METALLURGY
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- 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
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- C—CHEMISTRY; METALLURGY
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- 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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
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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
- 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
- C21D2211/004—Dispersions; Precipitations
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- Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Description
− 鋼を供給する工程、
− 鋼を半製品の形態で鋳造する工程、
− 半製品を再加熱する工程、
− 半製品を最終圧延温度まで熱間圧延して板を得る工程、
− 板を巻き取る工程、
− 任意に冷間圧延及び焼鈍を行う工程、
− 板が250〜900℃の間に含まれる温度で少なくとも15秒の時間tの間浸漬される、少なくとも1回の浸漬処理を行う工程
を含む。
− UTS:極限引張強度、
− UTSannealed:再結晶焼鈍後に得られた極限引張強度、
− TE:全伸び、
− TEannealed:再結晶焼鈍後に得られた全伸び、及び
− CR%:2回目の冷間圧延の圧下率。
A. 重量基準で
0.5<C<1.2%、
13.0≦Mn<25.0%、
S≦0.030%、
P≦0.080%、
N≦0.1%、
Si≦3.0%、
0.051≦Al≦4.0%、
及び純粋に任意の基準で、
Nb≦0.5%、
B≦0.005%、
Cr≦1.0%、
Mo≦0.40%、
Ni≦1.0%、
Cu≦5.0%、
Ti≦0.5%、
V≦2.5%、
0.06≦Sn≦0.2%
等の1つ以上の元素を含み、組成の残部が鉄及び加工から生じる不可避的不純物を構成する鋼板を有するスラブの供給工程、
B. そのようなスラブを再加熱し、そのスラブを熱間圧延する工程、
C. 巻き取り工程、
D. 第1の冷間圧延工程、
E. UTSannealedを有する焼鈍鋼板を得る再結晶焼鈍工程、及び
F. 以下の式Aを満たす圧下率CR%での第2の冷間圧延工程
1216.472−0.98795×UTSannealed≦(−0.0008×UTSannealed+1.0124)×CR%2+(0.0371×UTSannealed−29.583)×CR%
を含むTWIP鋼板の製造方法に関する。
Claims (17)
- 以下の工程、
A.
0.5<C<1.2%、
13.0≦Mn<25.0%、
S≦0.030%、
P≦0.080%、
N≦0.1%、
Si≦3.0%、
0.051≦Al≦4.0%、
V≦2.5%、
及び、任意に、
Nb≦0.5%、
B≦0.005%、
Cr≦1.0%、
Mo≦0.40%、
Ni≦1.0%、
Cu≦5.0%、
Ti≦0.5%、
0.06≦Sn≦0.2%
の1つ以上の元素を含み、組成の残部は鉄及び不可避的不純物からなるスラブの供給工程、
B. そのようなスラブを再加熱し、それを熱間圧延する工程、
C. 巻き取り工程、
D. 第1の冷間圧延工程、
E. UTSannealedを有する焼鈍鋼板を得る再結晶焼鈍工程、ここで、UTS annealed は再結晶焼鈍後に得られる鋼板のMPaでの極限引張強度を表し、
及び
F. 以下の式Aを満たす圧下率CR%での第2の冷間圧延工程
1216.472−0.98795×UTSannealed≦(−0.0008×UTSannealed+1.0124)×CR%2+(0.0371×UTSannealed−29.583)×CR%
を含み、
第2の冷間圧延が、1〜25%の間の圧下率で実行され、
第2の冷間圧延工程F.が、以下の式Bをさらに満たす圧下率で実行され、
1200MPa以上の極限引張強度(UTS)を有する、
TWIP鋼板の製造方法。 - スラブにおいてAlの量が、0.06%を超える、請求項1に記載の方法。
- 再加熱が、1000℃を超える温度で実施され、且つ最終圧延温度が少なくとも850℃である、請求項1又は2に記載の方法。
- 巻き取り温度が、580℃以下の温度で実行される、請求項1から3のいずれか一項に記載の方法。
- 第1の冷間圧延工程D)が、30〜70%の間の圧下率で実行される、請求項1から4のいずれか一項に記載の方法。
- 第1の冷間圧延工程D)が、40〜60%の間の圧下率で実行される、請求項5に記載の方法。
- 再結晶焼鈍E)が、700〜900℃の間で実行される、請求項1から6のいずれか一項に記載の方法。
- 再結晶焼鈍後に得られるUTSannealedが、800MPa以上である、請求項1から7のいずれか一項に記載の方法。
- UTSannealedが、800〜1400MPaの間である、請求項8に記載の方法。
- UTSannealedが、1000〜1400MPaの間である、請求項9に記載の方法。
- 再結晶焼鈍後に得られる全伸びTE%annealedが、10%を超える、請求項1から10のいずれか一項に記載の方法。
- TE%annealedが、15%を超える、請求項11に記載の方法。
- TE%annealedが、30%〜70%の間である、請求項12に記載の方法。
- 第2の冷間圧延工程F)の後に、溶融めっき工程G)が実施される、請求項1から13のいずれか一項に記載の方法。
- 溶融めっきが、アルミニウム系浴又は亜鉛系浴を用いて実施される、請求項14に記載の方法。
- アルミニウム系浴が、15%未満のSi、5.0%未満のFe、任意に0.1〜8.0%のMg、及び任意に0.1〜30.0%のZnを含み、残部はAlである、請求項15に記載の方法。
- 亜鉛系浴が、0.01〜8.0%のAl、任意に0.2〜8.0%のMgを含み、残部はZnである、請求項15に記載の方法。
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CN112281057A (zh) * | 2020-10-14 | 2021-01-29 | 东北大学 | 一种具有不同晶粒尺寸和孪晶含量的twip钢板及其制备方法 |
CN114703417B (zh) * | 2022-04-11 | 2022-12-02 | 常州大学 | 一种基于twip效应和微合金析出制备超细晶高强韧中锰钢的方法 |
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WO2017203310A1 (en) | 2016-05-24 | 2017-11-30 | Arcelormittal | Method for producing a twip steel sheet having an austenitic microstructure |
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