JP6935420B2 - 改善された強度、延性及び成形加工性を有する鋼板を製造するための方法 - Google Patents
改善された強度、延性及び成形加工性を有する鋼板を製造するための方法 Download PDFInfo
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- JP6935420B2 JP6935420B2 JP2018551520A JP2018551520A JP6935420B2 JP 6935420 B2 JP6935420 B2 JP 6935420B2 JP 2018551520 A JP2018551520 A JP 2018551520A JP 2018551520 A JP2018551520 A JP 2018551520A JP 6935420 B2 JP6935420 B2 JP 6935420B2
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- 238000000034 method Methods 0.000 title claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 110
- 239000010959 steel Substances 0.000 claims description 110
- 238000009826 distribution Methods 0.000 claims description 70
- 238000000137 annealing Methods 0.000 claims description 35
- 229910001566 austenite Inorganic materials 0.000 claims description 32
- 238000010791 quenching Methods 0.000 claims description 27
- 230000000171 quenching effect Effects 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 25
- 229910000734 martensite Inorganic materials 0.000 claims description 21
- 238000005246 galvanizing Methods 0.000 claims description 18
- 229910000859 α-Fe Inorganic materials 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 15
- 238000005275 alloying Methods 0.000 claims description 13
- 229910001563 bainite Inorganic materials 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000007747 plating Methods 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 239000010960 cold rolled steel Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 230000000717 retained effect Effects 0.000 description 10
- 239000011651 chromium Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000007654 immersion Methods 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 239000010955 niobium Substances 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 238000003303 reheating Methods 0.000 description 4
- 238000000638 solvent extraction Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- -1 silicon Chemical compound 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000002051 biphasic effect Effects 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007572 expansion measurement Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001540 jet deposition Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Classifications
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
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- 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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- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- C—CHEMISTRY; METALLURGY
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- 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
- C21D1/185—Hardening; Quenching with or without subsequent tempering from an intercritical temperature
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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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
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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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- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
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- 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
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C—ALLOYS
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
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- C22C—ALLOYS
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- C—CHEMISTRY; METALLURGY
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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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
- 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
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- C23C2/0224—Two or more thermal pretreatments
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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
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- C23C2/06—Zinc or cadmium or alloys based thereon
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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
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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
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- 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
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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
- C21D2211/002—Bainite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—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
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- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Coating With Molten Metal (AREA)
Description
・冷間圧延鋼板を用意するステップであって、
鋼の化学組成が、重量%により、
0.18%≦C≦0.25%、
0.9%≦Si≦1.8%、
0.02%≦Al≦1.0%、
1.5%≦Mn≦2.5%、
0.010%≦Nb≦0.035%、
0.10%≦Cr≦0.40%
を含有し、ただし、1.0%≦Si+Al≦2.35%であり、
残り部分が、Fe及び不可避的な不純物である、ステップ、
・50%〜80%のオーステナイト及び20%〜50%のフェライトを含む構造を得るように、アニーリング時間tAにわたってアニーリング温度TAで前記鋼板をアニーリングするステップ、
・20℃/秒〜50℃/秒の間に含まれる冷却速度で、Ms−50℃〜Ms−5℃の間に含まれる焼入れ温度QTまで前記鋼板を焼入れするステップ、
・前記鋼板を375℃〜450℃の間に含まれる分配温度PTに加熱し、少なくとも50秒の分配時間Ptにわたって前記鋼板を分配温度PTに維持するステップ、
・鋼板を室温に冷却するステップ
を含む、方法に関する。
0.18%≦C≦0.25%、
0.9%≦Si≦1.8%、
0.02%≦Al≦1.0%、
1.5%≦Mn≦2.5%、
0.010%≦Nb≦0.035%、
0.10%≦Cr≦0.40%
を含み、だたし、1.0%≦Si+Al≦2.35%であり、残り部分が、Fe及び不可避的な不純物である、化学組成を有する鋼板において、
前記鋼の微細構造が、面積の割合により、
・20%〜50%の二相域フェライト、
・10%〜20%の残留オーステナイト、
・25%〜45%の焼戻しされたマルテンサイト、
・ベイナイトであって、焼戻しされたマルテンサイト及びベイナイトの合計が30%〜60%の間に含まれる、
・10%〜20%のフレッシュマルテンサイト
からなる、鋼板にも関する。
Claims (12)
- 鋼板を製造するための方法であって、前記鋼板が、面積の割合により、20%〜50%の二相域フェライト、10%〜20%の残留オーステナイト、25%〜45%の焼戻しされたマルテンサイト、10%〜20%のフレッシュマルテンサイト、及びベイナイトからなり、焼戻しされたマルテンサイト及びベイナイトの面積割合の合計が30%〜60%の間に含まれる微細構造を有し、以下の連続ステップ:
− 以下の重量による化学組成を有する鋼でできた、冷間圧延鋼板を用意するステップであって:
0.18%≦C≦0.25%、
0.9%≦Si≦1.8%、
0.02%≦Al≦1.0%、
1.5%≦Mn≦2.5%、
0.010%≦Nb≦0.035%、
0.10%≦Cr≦0.40%
を含有し、ただし、1.0%≦Si+Al≦2.35%であり、
残り部分が、Fe及び不可避的な不純物である、ステップ、
− 50%〜80%のオーステナイト及び20%〜50%のフェライトを含む構造を得るように、30秒〜300秒の間に含まれるアニーリング時間tAにわたって780℃〜840℃の間に含まれるアニーリング温度TAで前記鋼板をアニーリングするステップ、
− 20℃/秒〜50℃/秒の間に含まれる冷却速度で、Ms−50℃〜Ms−5℃の間に含まれる焼入れ温度QTまで前記鋼板を焼入れするステップ、
− 前記鋼板を375℃〜450℃の間に含まれる分配温度PTに加熱し、少なくとも50秒の分配時間Ptにわたって前記鋼板を分配温度PTに維持するステップ、
− 前記鋼板を室温に冷却するステップ
を含み、
前記鋼板が、440〜750MPaの間に含まれる降伏強度、少なくとも980MPaの引張強度、少なくとも20%の全伸び及び少なくとも20%の穴広げ率HERを有する、
方法。 - 前記鋼板が、焼入れの直後に、面積の割合により、少なくとも20%のオーステナイト、30%〜60%の間のマルテンサイト及び20%〜50%のフェライトからなる構造を有する、請求項1に記載の方法。
- 前記鋼の化学組成が、1.25%≦Si+Al≦2.35%であるような組成である、請求項1又は2に記載の方法。
- 前記鋼板を分配温度PTに維持するステップと、前記鋼板を室温に冷却するステップとの間に、前記鋼板を溶融めっきコーティングするステップをさらに含む、請求項1から3のいずれか一項に記載の方法。
- 分配温度PTが、400℃〜430℃の間に含まれる、請求項4に記載の方法。
- 分配時間Ptが、50秒〜150秒の間に含まれる、請求項4又は5に記載の方法。
- 溶融めっきコーティングするステップが、亜鉛めっきするステップである、請求項4から6のいずれか一項に記載の方法。
- 溶融めっきコーティングするステップが、480℃〜515℃の間に含まれる合金化温度GATによって合金化溶融亜鉛めっきするステップである、請求項4から6のいずれか一項に記載の方法。
- 分配時間Ptが、50秒〜140秒の間に含まれる、請求項8に記載の方法。
- 前記鋼板を室温に冷却するステップが、分配時間Ptにわたって前記鋼板を分配温度PTに維持するステップの直後に実施され、分配時間Ptが、少なくとも100秒である、請求項1から3のいずれか一項に記載の方法。
- 前記鋼板が、少なくとも10℃/秒の冷却速度で室温に冷却される、請求項1から10のいずれか一項に記載の方法。
- 前記鋼板が焼入れ温度QTに焼入れされた後、且つ前記鋼板が分配温度PTに加熱される前に、前記鋼板が、2秒〜8秒の間に含まれる保持時間にわたって焼入れ温度QTに保持される、請求項1から11のいずれか一項に記載の方法。
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IBPCT/IB2015/059837 | 2015-12-21 | ||
PCT/EP2016/082192 WO2017108956A1 (en) | 2015-12-21 | 2016-12-21 | Method for producing a steel sheet having improved strength, ductility and formability |
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EP3394296A1 (en) | 2018-10-31 |
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EP3653737B1 (en) | 2021-10-27 |
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CA3008067C (en) | 2023-09-05 |
KR102618089B1 (ko) | 2023-12-26 |
PL3394296T3 (pl) | 2020-08-10 |
EP3653737A1 (en) | 2020-05-20 |
WO2017109538A1 (en) | 2017-06-29 |
CN108513591A (zh) | 2018-09-07 |
MA44134B1 (fr) | 2020-06-30 |
PL3653737T3 (pl) | 2022-02-07 |
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ES2899448T3 (es) | 2022-03-11 |
US20190003005A1 (en) | 2019-01-03 |
MA49585B1 (fr) | 2021-10-29 |
KR20180096638A (ko) | 2018-08-29 |
ZA201803917B (en) | 2019-02-27 |
ES2780924T3 (es) | 2020-08-27 |
JP2019505692A (ja) | 2019-02-28 |
RU2018122302A3 (ja) | 2020-01-28 |
BR112018012131B1 (pt) | 2021-09-28 |
BR112018012131A2 (pt) | 2018-12-04 |
CA3008067A1 (en) | 2017-06-29 |
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