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
- Publication number
- 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
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- temperature
- distribution
- seconds
- steel
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
-
- 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
-
- 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
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/185—Hardening; Quenching with or without subsequent tempering from an intercritical temperature
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/22—Martempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
-
- 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
- C23C2/34—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
-
- 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
- C21D2211/002—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- 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。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IBPCT/IB2015/059837 | 2015-12-21 | ||
PCT/IB2015/059837 WO2017109538A1 (en) | 2015-12-21 | 2015-12-21 | Method for producing a steel sheet having improved strength, ductility and formability |
PCT/EP2016/082192 WO2017108956A1 (en) | 2015-12-21 | 2016-12-21 | Method for producing a steel sheet having improved strength, ductility and formability |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2019505692A JP2019505692A (ja) | 2019-02-28 |
JP6935420B2 true JP6935420B2 (ja) | 2021-09-15 |
Family
ID=55273296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2018551520A Active JP6935420B2 (ja) | 2015-12-21 | 2016-12-21 | 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 |
Country Status (15)
Country | Link |
---|---|
US (1) | US20190003005A1 (ja) |
EP (2) | EP3653737B1 (ja) |
JP (1) | JP6935420B2 (ja) |
KR (1) | KR102618089B1 (ja) |
CN (1) | CN108513591B (ja) |
BR (1) | BR112018012131B1 (ja) |
CA (1) | CA3008067C (ja) |
ES (2) | ES2780924T3 (ja) |
HU (2) | HUE056674T2 (ja) |
MA (2) | MA49585B1 (ja) |
MX (1) | MX2018007648A (ja) |
PL (2) | PL3394296T3 (ja) |
RU (1) | RU2716920C2 (ja) |
WO (2) | WO2017109538A1 (ja) |
ZA (1) | ZA201803917B (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107597962A (zh) * | 2017-08-15 | 2018-01-19 | 上海交通大学 | 一种热冲压与模具修边的集成工艺 |
WO2019122961A1 (en) * | 2017-12-19 | 2019-06-27 | Arcelormittal | High strength and high formability steel sheet and manufacturing method |
WO2019122964A1 (en) * | 2017-12-19 | 2019-06-27 | Arcelormittal | Steel sheet having excellent toughness, ductility and strength, and manufacturing method thereof |
WO2020058748A1 (en) * | 2018-09-20 | 2020-03-26 | Arcelormittal | Cold rolled and coated steel sheet and a method of manufacturing thereof |
WO2021026437A1 (en) * | 2019-08-07 | 2021-02-11 | United States Steel Corporation | High ductility zinc-coated steel sheet products |
WO2021123889A1 (en) * | 2019-12-19 | 2021-06-24 | Arcelormittal | Hot rolled and heat-treated steel sheet and method of manufacturing the same |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004022794A1 (en) * | 2002-09-04 | 2004-03-18 | Colorado School Of Mines | Method for producing steel with retained austenite |
FR2850671B1 (fr) * | 2003-02-05 | 2006-05-19 | Usinor | Procede de fabrication d'une bande d'acier dual-phase a structure ferrito-martensitique, laminee a froid et bande obtenue |
EP1749895A1 (fr) * | 2005-08-04 | 2007-02-07 | ARCELOR France | Procédé de fabrication de tôles d'acier présentant une haute résistance et une excellente ductilité, et tôles ainsi produites |
JP5418047B2 (ja) * | 2008-09-10 | 2014-02-19 | Jfeスチール株式会社 | 高強度鋼板およびその製造方法 |
CA2781815C (en) * | 2009-11-30 | 2015-04-14 | Nippon Steel Corporation | High strength steel plate with ultimate tensile strength of 900 mpa or more excellent in hydrogen embrittlement resistance and method of production of same |
JP5333298B2 (ja) * | 2010-03-09 | 2013-11-06 | Jfeスチール株式会社 | 高強度鋼板の製造方法 |
US20130133792A1 (en) * | 2010-08-12 | 2013-05-30 | Jfe Steel Corporation | High-strength cold rolled sheet having excellent formability and crashworthiness and method for manufacturing the same |
JP5408383B2 (ja) * | 2011-03-28 | 2014-02-05 | 新日鐵住金株式会社 | 冷延鋼板及びその製造方法 |
WO2012168564A1 (fr) * | 2011-06-07 | 2012-12-13 | Arcelormittal Investigación Y Desarrollo Sl | Tôle d'acier laminée à froid et revêtue de zinc ou d'alliage de zinc, procédé de fabrication et utilisation d'une telle tôle |
KR101607786B1 (ko) * | 2011-09-30 | 2016-03-30 | 신닛테츠스미킨 카부시키카이샤 | 인장 강도 980㎫ 이상 갖는 도금 밀착성, 성형성과 구멍 확장성이 우수한 고강도 용융 아연 도금 강판 및 고강도 합금화 용융 아연 도금 강판과 그 제조 방법 |
JP5953695B2 (ja) * | 2011-09-30 | 2016-07-20 | 新日鐵住金株式会社 | めっき密着性と成形性に優れた高強度溶融亜鉛めっき鋼板とその製造方法 |
CN103827335B (zh) * | 2011-09-30 | 2015-10-21 | 新日铁住金株式会社 | 镀锌钢板及其制造方法 |
US8876987B2 (en) * | 2011-10-04 | 2014-11-04 | Jfe Steel Corporation | High-strength steel sheet and method for manufacturing same |
JP5348268B2 (ja) * | 2012-03-07 | 2013-11-20 | Jfeスチール株式会社 | 成形性に優れる高強度冷延鋼板およびその製造方法 |
EP2881481B1 (en) * | 2012-07-31 | 2019-04-03 | JFE Steel Corporation | High-strength hot-dip galvanized steel sheet having excellent moldability and shape fixability, and method for manufacturing same |
CN102952996A (zh) * | 2013-01-04 | 2013-03-06 | 鞍钢股份有限公司 | 一种高延伸率冷轧trip钢板及其制备方法 |
EP2971209B1 (en) * | 2013-03-11 | 2017-04-05 | Tata Steel IJmuiden B.V. | High strength hot dip galvanised complex phase steel strip |
JP5728115B1 (ja) * | 2013-09-27 | 2015-06-03 | 株式会社神戸製鋼所 | 延性および低温靭性に優れた高強度鋼板、並びにその製造方法 |
EP3167092B1 (en) * | 2014-07-07 | 2018-03-28 | Tata Steel IJmuiden BV | Steel strip having high strength and high formability, the steel strip having a hot dip zinc based coating |
-
2015
- 2015-12-21 WO PCT/IB2015/059837 patent/WO2017109538A1/en active Application Filing
-
2016
- 2016-12-21 PL PL16825409T patent/PL3394296T3/pl unknown
- 2016-12-21 EP EP19216515.7A patent/EP3653737B1/en active Active
- 2016-12-21 PL PL19216515T patent/PL3653737T3/pl unknown
- 2016-12-21 HU HUE19216515A patent/HUE056674T2/hu unknown
- 2016-12-21 CN CN201680074873.4A patent/CN108513591B/zh active Active
- 2016-12-21 KR KR1020187017595A patent/KR102618089B1/ko active IP Right Grant
- 2016-12-21 MX MX2018007648A patent/MX2018007648A/es unknown
- 2016-12-21 EP EP16825409.2A patent/EP3394296B1/en active Active
- 2016-12-21 JP JP2018551520A patent/JP6935420B2/ja active Active
- 2016-12-21 RU RU2018122302A patent/RU2716920C2/ru active
- 2016-12-21 US US16/064,513 patent/US20190003005A1/en active Pending
- 2016-12-21 ES ES16825409T patent/ES2780924T3/es active Active
- 2016-12-21 CA CA3008067A patent/CA3008067C/en active Active
- 2016-12-21 WO PCT/EP2016/082192 patent/WO2017108956A1/en active Application Filing
- 2016-12-21 HU HUE16825409A patent/HUE049063T2/hu unknown
- 2016-12-21 ES ES19216515T patent/ES2899448T3/es active Active
- 2016-12-21 MA MA49585A patent/MA49585B1/fr unknown
- 2016-12-21 BR BR112018012131-2A patent/BR112018012131B1/pt active IP Right Grant
- 2016-12-21 MA MA44134A patent/MA44134B1/fr unknown
-
2018
- 2018-06-12 ZA ZA2018/03917A patent/ZA201803917B/en unknown
Also Published As
Publication number | Publication date |
---|---|
RU2716920C2 (ru) | 2020-03-17 |
EP3394296A1 (en) | 2018-10-31 |
WO2017108956A1 (en) | 2017-06-29 |
MA44134B1 (fr) | 2020-06-30 |
CN108513591B (zh) | 2020-04-28 |
KR20180096638A (ko) | 2018-08-29 |
ES2899448T3 (es) | 2022-03-11 |
MA49585B1 (fr) | 2021-10-29 |
BR112018012131B1 (pt) | 2021-09-28 |
MA49585A (fr) | 2021-04-28 |
CN108513591A (zh) | 2018-09-07 |
US20190003005A1 (en) | 2019-01-03 |
HUE056674T2 (hu) | 2022-02-28 |
EP3653737A1 (en) | 2020-05-20 |
BR112018012131A2 (pt) | 2018-12-04 |
ES2780924T3 (es) | 2020-08-27 |
EP3394296B1 (en) | 2020-02-12 |
RU2018122302A3 (ja) | 2020-01-28 |
MX2018007648A (es) | 2018-09-21 |
PL3653737T3 (pl) | 2022-02-07 |
CA3008067C (en) | 2023-09-05 |
EP3653737B1 (en) | 2021-10-27 |
WO2017109538A1 (en) | 2017-06-29 |
PL3394296T3 (pl) | 2020-08-10 |
CA3008067A1 (en) | 2017-06-29 |
ZA201803917B (en) | 2019-02-27 |
HUE049063T2 (hu) | 2020-09-28 |
JP2019505692A (ja) | 2019-02-28 |
RU2018122302A (ru) | 2019-12-25 |
KR102618089B1 (ko) | 2023-12-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6823148B2 (ja) | 強度、延性および成形性が改善された高強度被覆鋼板を製造する方法 | |
JP6935420B2 (ja) | 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 | |
JP6564963B1 (ja) | 超高強度被覆または非被覆鋼板を製造する方法および得られる鋼板 | |
KR101660607B1 (ko) | 냉연 강판 및 냉연 강판의 제조 방법 | |
JP7033625B2 (ja) | 強度、延性および成形性が改善された被覆鋼板の製造方法 | |
CN108884512B (zh) | 用于生产具有改善的强度和可成形性的高强度钢板的方法以及所获得的高强度钢板 | |
JP2019505690A (ja) | 改善された延性及び成形加工性を有する高強度鋼板を製造するための方法並びに得られた鋼板 | |
JP6515119B2 (ja) | 強度および延性が改善された高強度被覆鋼板を製造する方法ならびに得られる鋼板 | |
EP2803744A1 (en) | Cold-rolled steel sheet and method for producing same | |
JP7082963B2 (ja) | 強度、成形性が改善された高強度被覆鋼板の製造方法および得られた鋼板 | |
KR102453718B1 (ko) | 성형성 및 연성이 개선된 고강도 강 시트의 제조 방법 및 얻어진 시트 | |
JP2021505764A (ja) | 冷間圧延焼鈍鋼板及びその製造方法 | |
JP2021505765A (ja) | 冷間圧延焼鈍鋼板及びその製造方法 | |
JP6704997B2 (ja) | 超高強度合金化溶融亜鉛めっき鋼板を製造するための方法、及び得られた合金化溶融亜鉛めっき鋼板 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20180821 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20191121 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20201006 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20201201 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20210219 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20210803 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20210825 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6935420 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |