CN116555668A - 热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法 - Google Patents

热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法 Download PDF

Info

Publication number
CN116555668A
CN116555668A CN202310549754.1A CN202310549754A CN116555668A CN 116555668 A CN116555668 A CN 116555668A CN 202310549754 A CN202310549754 A CN 202310549754A CN 116555668 A CN116555668 A CN 116555668A
Authority
CN
China
Prior art keywords
steel sheet
hot
content
ratio
base 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.)
Pending
Application number
CN202310549754.1A
Other languages
English (en)
Inventor
金圣祐
吴振根
金相宪
赵悦来
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Posco Holdings Co ltd
Original Assignee
Posco Holdings Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Posco Holdings Co ltd filed Critical Posco Holdings Co ltd
Publication of CN116555668A publication Critical patent/CN116555668A/zh
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C21D9/48Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02Stamping using rigid devices or tools
    • B21D22/022Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26Methods of annealing
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62Quenching devices
    • C21D1/673Quenching devices for die quenching
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76Adjusting the composition of the atmosphere
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D3/00Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02Extraction of non-metals
    • C21D3/04Decarburising
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D6/00Heat treatment of ferrous alloys
    • C21D6/005Heat treatment of ferrous alloys containing Mn
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D6/00Heat treatment of ferrous alloys
    • C21D6/008Heat treatment of ferrous alloys containing Si
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D7/00Modifying the physical properties of iron or steel by deformation
    • C21D7/13Modifying the physical properties of iron or steel by deformation by hot working
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226Hot rolling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236Cold rolling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273Final recrystallisation annealing
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04Modifying 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
    • C21D8/0421Modifying 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 working steps
    • C21D8/0426Hot rolling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04Modifying 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
    • C21D8/0447Modifying 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
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04Modifying 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
    • C21D8/0447Modifying 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
    • C21D8/0457Modifying 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 with diffusion of elements, e.g. decarburising, nitriding
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04Modifying 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
    • C21D8/0447Modifying 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
    • C21D8/0473Final recrystallisation annealing
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/001Ferrous alloys, e.g. steel alloys containing N
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/002Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32Ferrous alloys, e.g. steel alloys containing chromium with boron
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0224Two or more thermal pretreatments
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/024Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06Zinc or cadmium or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12Aluminium or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C30/00Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00Electroplating: Baths therefor
    • C25D3/02Electroplating: Baths therefor from solutions
    • C25D3/22Electroplating: Baths therefor from solutions of zinc
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00Electroplating: Baths therefor
    • C25D3/02Electroplating: Baths therefor from solutions
    • C25D3/42Electroplating: Baths therefor from solutions of light metals
    • C25D3/44Aluminium
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/002Bainite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/005Ferrite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/008Martensite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/009Pearlite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D6/00Heat treatment of ferrous alloys
    • C21D6/002Heat treatment of ferrous alloys containing Cr

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Articles (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

本发明提供一种热成型后的冲击特性优异的热成型用镀覆钢板、利用所述热成型用镀覆钢板制造的热成型部件和它们的制造方法,所述热成型用镀覆钢板包括:基础钢板,以重量%计,所述基础钢板包含:C:0.15‑0.4%、Si:0.1‑1%、Mn:0.6‑8%、P:0.001‑0.05%、S:0.0001‑0.02%、Al:0.01‑0.1%、N:0.001‑0.02%、Cr:0.01‑0.5%、余量的Fe和其它杂质;和镀层,其形成在所述基础钢板的表面,并且所述镀层由锌、铝或包含它们的合金形成,其中,表层部的C含量(CS)与所述基础钢板的C含量(CB)的比(CS/CB)为0.6以下,表层部的Mn和Cr含量之和(MnS+CrS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnS+CrS)/(MnB+CrB))为0.8以上。

Description

热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件 和它们的制造方法
本申请是申请日为2019年12月19日、中国专利申请号为201980084549.4且发明名称为“热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法”的中国专利申请的分案申请,并且本申请要求享有申请号为10-2018-0164822的韩国申请的优先权。
技术领域
本发明涉及一种可以优选用于需要耐冲击特性的汽车构件等的热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法。
背景技术
近年来,由于石油能源的枯竭和对环境的高度关注,对提升汽车的燃油效率的管制日渐严格。在材料方面,作为用于提升汽车的燃油效率的一种方法,可以列举减少所使用的钢板的厚度,但是减少厚度时在汽车的安全性方面可能会发生问题,因此必须伴随着钢板强度的提高。
由于如上所述的理由,对高强度钢板具有持续性的需求,并且已经开发了各种种类的钢板。但是,这些钢板自身具有高强度,因此存在加工性不良的问题。即,各个等级的钢板具有强度与伸长率的乘积总是为恒定值的倾向,因此钢板的强度变高时存在作为加工性的指标的伸长率减小的问题。
为了解决这种问题,提出了热压成型法。热压成型法是如下的方法:在适于加工的高温下对钢板进行加工后快速冷却至低温,以在钢板内形成马氏体等低温组织,从而提高最终产品的强度。在如上所述的情况下,当制造具有高强度的部件时,具有可以最小化加工性问题的优点。
涉及这种热成型部件的代表性的技术有专利文献1。在专利文献1中,将Al-Si镀覆钢板加热至850℃以上,然后通过冲压进行热成型并快速冷却,使得部件的组织形成为马氏体,从而确保拉伸强度超过1600MPa的超高强度。通过确保这种超高强度,具有可以容易实现汽车的轻量化的优点。但是,根据专利文献1,由于高强度,碰撞时冲击特性相对差,并且根据热成型条件等,存在出现一部分显示出异常低的冲击特性的现象的问题。
因此,专利文献2中提出了如下的技术:在热成型用钢板中,通过调节Ca/S比,使夹杂物球化,并添加诸如Nb的合金元素,通过晶粒微细化来提高热成型后的冲击特性。但是,专利文献2是关于控制夹杂物和晶粒尺寸以改善普通的铁钢材料的冲击特性的内容,并且被评价为难以作为在热压成型领域中用于改善实际热成型时发生的低冲击特性的方法进行应用。
因此,目前需要开发一种热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法。
(专利文献1)美国专利授权公报第6296805号
(专利文献2)韩国专利公开公报第10-2010-0047011号
发明内容
要解决的技术问题
本发明的目的在于提供一种热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法。
本发明的技术问题并不限于上述内容。本发明所属技术领域的技术人员基于本发明的说明书全文可以容易地理解本发明的附加技术问题。
技术方案
本发明的一个方面是一种热成型后的冲击特性优异的热成型用镀覆钢板,所述热成型用镀覆钢板包括:基础钢板,以重量%计,所述基础钢板包含:C:0.15-0.4%、Si:0.1-1%、Mn:0.6-8%、P:0.001-0.05%、S:0.0001-0.02%、Al:0.01-0.1%、N:0.001-0.02%、Cr:0.01-0.5%、余量的Fe和其它杂质;和镀层,其形成在所述基础钢板的表面,并且所述镀层由锌、铝或包含它们的合金形成,其中,表层部的C含量(CS)与所述基础钢板的C含量(CB)的比(CS/CB)为0.6以下,表层部的Mn和Cr含量之和(MnS+CrS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnS+CrS)/(MnB+CrB))为0.8以上(其中,所述表层部是指从除所述镀层之外的基础钢板的表面到深度为15μm的区域)。
以重量%计,所述基础钢板还可以包含B:0.0005-0.01%和Ti:0.01-0.05%中的一种以上。
所述基础钢板的微细组织中,以面积%计,表层部中可以包含40-100%的铁素体,余量可以包含0-60%的珠光体、贝氏体或马氏体,中心部中可以包含30-90%的铁素体,余量可以包含10-70%的珠光体、贝氏体或马氏体。
本发明的另一个方面是一种冲击特性优异的热成型部件,所述热成型部件包括:基础钢板,以重量%计,所述基础钢板包含:C:0.15-0.4%、Si:0.1-1%、Mn:0.6-8%、P:0.001-0.05%、S:0.0001-0.02%、Al:0.01-0.1%、N:0.001-0.02%、Cr:0.01-0.5%、余量的Fe和其它杂质;和合金镀层,其形成在所述基础钢板的表面,并且所述合金镀层由包含锌或铝的合金形成,其中,部件表层部的C含量(CPS)与所述基础钢板的C含量(CB)的比(CPS/CB)为1.2以下,部件表层部的Mn和Cr含量之和(MnPS+CrPS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnPS+CrPS)/(MnB+CrB))为0.8以上(其中,所述部件表层部是指从除所述合金镀层之外的基础钢板的表面到深度为25μm的区域)。
所述部件表层部的马氏体晶界中的铁素体覆盖率可以为30%以下。
本发明的另一个方面是一种制造热成型后的冲击特性优异的热成型用镀覆钢板的方法,所述方法包括以下步骤:准备板坯,并将所述板坯加热至1050-1300℃的温度,以重量%计,所述板坯包含:C:0.15-0.4%、Si:0.1-1%、Mn:0.6-8%、P:0.001-0.05%、S:0.0001-0.02%、Al:0.01-0.1%、N:0.001-0.02%、Cr:0.01-0.5%、余量的Fe和其它杂质;在800-950℃的热精轧温度范围内对加热的所述板坯进行热轧以获得热轧钢板;在完成热精轧后,在450-750℃下对所述热轧钢板进行收卷;将收卷的所述热轧钢板加热至740-860℃,并在露点温度为-10℃至30℃的气氛中进行退火10-600秒;以及在退火后,将所述热轧钢板浸入镀浴中进行镀覆,所述镀浴由锌、铝或包含它们的合金组成。
在所述热轧之后且在收卷之前,可以进一步包括通过冷轧获得冷轧钢板的步骤。
以重量%计,所述板坯还可以包含B:0.00005-0.01%和Ti:0.01-0.05%中的一种以上。
本发明的另一个方面是一种制造冲击特性优异的热成型部件的方法,所述方法中在Ac3至950℃的温度范围内对通过上述制造热成型后的冲击特性优异的热成型用镀覆钢板的方法制造的热成型用镀覆钢板进行热处理1-15分钟后进行热压成型。
有益效果
根据本发明,具有可以提供一种热成型后的冲击特性优异的热成型用镀覆钢板及其制造方法的效果。
通过对本发明的热成型用镀覆钢板进行热压成型而制造的热成型部件在1500MPa的拉伸强度的水平下通过VDA238-100弯曲测试测量的弯曲角度为60°以上,因此具有可以确保优异的冲击特性的效果。
本发明的多个有益的优点和效果并不限于上述内容,在对本发明的具体的实施方案进行说明的过程中可以更容易地理解。
附图说明
图1是示出对发明例1的热成型用镀覆钢板进行热压成型之前利用GDS从表层开始在深度方向上对碳(C)、锰(Mn)和铬(Cr)的浓度进行分析的结果的图。
图2是示出发明例1的热成型后的部件表层部组织的光学显微镜照片。
图3是示出对比较例1的热成型用镀覆钢板进行热压成型之前利用GDS从表层开始在深度方向上对碳(C)、锰(Mn)和铬(Cr)的浓度进行分析的结果的图。
图4是示出比较例3的热成型后的部件表层部组织的光学显微镜照片。
最佳实施方式
以下,对本发明的优选的实施方案进行说明。但是,本发明的实施方案可以变形为各种其它实施方案,本发明的范围并不限定于以下说明的实施方案。此外,本发明的实施方案是为了向本领域技术人员更完整地说明本发明而提供的。
本发明人注意到与镀覆材料相比,非镀覆材料的热成型后的弯曲角度显著优异。对此进行进一步研究的结果,确认到在非镀覆材料的情况下,在用于热成型的加热过程中钢板的表层部发生脱碳,因此表层部中形成软质的铁素体层且弯曲性变得优异。
因此,本发明人想到如果在镀覆材料中也可以通过降低表层部的C含量而在基础钢板的表层部形成软质相的层,则可以改善热成型部件的弯曲性。但是,发现在镀覆材料的情况下,无法像非镀覆材料一样在用于热成型的加热过程中发生充分的脱碳,因此难以像非镀覆材料一样形成软质的铁素体层,而且如果没有连续且充分地形成铁素体层,则反而发生弯曲性降低的问题。
本发明人为了克服如上所述的问题而进行更深入的研究的结果,确认到通过控制退火条件,相对于中心部的C含量,将基础钢板表层部的C含量控制在一定水平以下,并且相对于中心部的Mn和Cr含量之和,将基础钢板表层部的Mn和Cr含量之和控制在一定水平以上,由此可以提供一种热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法,从而完成了本发明。
下面,首先对本发明的一个方面的热成型后的冲击特性优异的热成型用镀覆钢板和热成型部件进行详细说明。
热成型后的冲击特性优异的热成型用镀覆钢板
本发明的一个方面的热成型后的冲击特性优异的热成型用镀覆钢板包括:基础钢板,以重量%计,所述基础钢板包含:C:0.15-0.4%、Si:0.1-1%、Mn:0.6-8%、P:0.001-0.05%、S:0.0001-0.02%、Al:0.01-0.1%、N:0.001-0.02%、Cr:0.01-0.5%、余量的Fe和其它杂质;和镀层,其形成在所述基础钢板的表面,并且所述镀层由锌、铝或它们的合金形成,其中,表层部的C含量(CS)与所述基础钢板的C含量(CB)的比(CS/CB)为0.6以下,表层部的Mn和Cr含量之和(MnS+CrS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnS+CrS)/(MnB+CrB))为0.8以上。
首先,对本发明的基础钢板的合金组成进行详细说明。本发明中,需要注意的是,除非另有定义,否则各元素的含量表示重量%。
C:0.15-0.4%
C是提高热成型部件的强度所必需的元素。当C含量小于0.15%时,难以确保充分的强度。另一方面,当C含量超过0.4%时,对热轧材料进行冷轧时热轧材料的强度过高,使得冷轧性大幅变差,而且可能会使点焊性大幅降低。因此,本发明中的所述C含量优选限制为0.15-0.4%。
Si:0.1-1%
Si在炼钢中作为脱氧剂添加,并且Si是固溶强化元素和抑制碳化物生成的元素,有助于提高热成型部件的强度,而且是对材质均匀化有效的元素。当Si含量小于0.1%时,上述效果不充分。另一方面,当Si含量超过1%时,由于在退火过程中在钢板表面生成的Si氧化物,Al镀覆性可能会大幅降低。因此,本发明中的所述Si含量可以限制为0.1-1%。
Mn:0.6-8%
Mn确保固溶强化效果,并且Mn是在热成型部件中为了降低用于确保马氏体的临界冷却速度而添加的元素。为了获得上述效果,需要添加的Mn含量为0.6%以上。另一方面,当Mn含量超过8%时,在热成型工艺之前,由于钢板的强度上升,不仅冷轧性降低,而且存在合金铁成本增加并且点焊性变差的问题。因此,本发明中的所述Mn含量可以限制为0.6-8%。
P:0.001-0.05%
P在钢中以杂质存在,P的含量尽可能越少越有利。因此,本发明中的P的含量可以限制为0.05%以下,优选地,还可以限制为0.03%以下。P是越少越有利的杂质元素,因此无需特别设定P含量的下限。但是,为了过度降低P含量,制造成本可能会增加,因此,考虑到这种情况时,P含量的下限可以设为0.001%。
S:0.0001-0.02%
S是钢中的杂质,并且S是损害部件的延展性、冲击特性和焊接性的元素,因此将S的最大含量限制为0.02%,优选可以限制为0.01%以下。但是,当S的最小含量小于0.0001%时,制造成本可能会增加,因此S含量的下限可以设为0.0001%。
Al:0.01-0.1%
Al和Si一起在炼钢中起到脱氧的作用,因此可以提高钢的洁净度,为了获得上述效果,可以以0.01%以上的含量添加Al。但是,当Al含量超过0.1%时,由于在连铸工艺中形成的过多的AlN,高温延展性降低,从而存在容易产生板坯裂纹的问题,因此Al含量的上限可以设为0.1%以下。因此,本发明中的Al含量优选为0.01-0.1%。
N:0.001-0.02%
N是在钢中作为杂质包含的元素,当N含量超过0.02%时,由于在连铸工艺中形成的过多的AlN,高温延展性降低,从而存在容易产生板坯裂纹的问题。因此,为了减少板坯的连续铸造时产生裂纹的敏感度并确保冲击特性,可以包含0.02%以下的N。虽然无需特别设定N含量的下限,但是考虑到制造成本的增加等,还可以将N含量的下限设定为0.001%以上。因此,本发明中的N含量优选为0.001-0.02%。
Cr:0.01-0.5%
与Mn相似地,Cr是为了提高固溶强化效果和热成型时的淬透性而添加的元素,为了获得上述效果,可以添加0.01%以上的Cr。但是,当Cr含量超过0.5%时,虽然可以充分确保淬透性,但其特性饱和,而且钢板制造成本可能会增加。因此,本发明中的Cr含量优选为0.01-0.5%。
本发明的一个方面的热成型用镀覆钢板的基础钢板中,除了包含上述成分之外,还可以进一步包含B:0.0005-0.01%和Ti:0.01-0.05%中的一种以上。
B:0.0005-0.01%
B是即使添加少量也可以提高淬透性的元素,并且B是偏析在原奥氏体晶界上并可以抑制由P和/或S的晶界偏析所引起的热成型部件的脆性的元素,为了获得上述效果,可以添加0.0005%以上的B。但是,当B的含量超过0.01%时,不仅其效果饱和,而且在热轧时导致脆性,因此B含量的上限可以设为0.01%,优选地,所述B含量可以设为0.005%以下。因此,本发明中的B含量优选为0.0005-0.01%。
Ti:0.01-0.05%
Ti的添加是为了与在钢中以杂质残留的氮结合形成TiN而使确保淬透性所必需的固溶B残留。当Ti含量小于0.01%时,难以充分期待其效果,当Ti含量超过0.05%时,不仅其特性可能会饱和,而且钢板制造成本可能会增加。因此,本发明中的Ti含量优选为0.01-0.05%。
除了上述成分之外的余量是铁(Fe),并且只要是可以包含在热压成型用钢板中的成分,则对这些成分的进一步的添加不作特别限制。此外,在通常的制造过程中可能会从原料或周围环境不可避免地混入并不需要的杂质,因此无法排除这些杂质。这些杂质对于通常的制造过程的技术人员而言是众所周知的,因此在本说明书中不特别提及其所有内容。
本发明的一个方面的热成型后的冲击特性优异的热成型用镀覆钢板包括形成在基础钢板的表面的镀层,并且所述镀层由锌、铝或它们的合金形成。所述镀层在最终构件中赋予部件的耐蚀性,并且在用于热成型的加热时起到抑制基础钢板的脱碳和氧化皮的形成的作用。
本发明中对所述镀层的种类不作特别限制,只要是用于现有的热成型用钢板的镀层,则在本发明中可以不受限制地使用。作为非限制性的一个具体实施方案,所述镀层可以由锌、铝或包含它们的合金形成,更具体地,所述镀层可以是热浸镀锌层、电镀锌层、合金化锌镀层、铝镀层或铝合金镀层。
另外,根据本发明的一个方面,在不损害本发明的目的的范围内,所述镀层可以包含在制造过程中可能会包含的成分,特别是可以包含其它不可避免的杂质。
此外,所述镀层的厚度可以为5-100μm。当所述镀层的厚度小于5μm时,在热成型部件中难以显示出充分的耐蚀性,另一方面,当所述镀层的厚度超过100μm时,用于热成型的加热时间过度增加,而且相对于提高耐蚀性的效果,可能会发生制造成本过度增加的问题。
另外,本发明的热成型用镀覆钢板中,表层部的C含量(CS)与基础钢板的C含量(CB)的比(CS/CB)(以下,还称为“比(CS/CB)”)满足0.6以下。其中,所述表层部是指从除镀层之外的基础钢板的表面到深度为15μm的区域。
此外,根据本发明的一个方面,在所述热成型用镀覆钢板中,表层部的C含量(CS)与所述基础钢板的C含量(CB)的比(CS/CB)优选可以为0.5以下,更优选可以为0.4以下,最优选可以为0.35以下。
当将所述比(CS/CB)控制在低至0.6以下时,与热成型后在基础钢板的中心部形成硬质的马氏体相不同,由于低的C含量,表层部中形成相对软质的马氏体相。由于镀覆钢板的表层部中形成软质的马氏体相,表层部的硬度降低,因此可以确保优异的弯曲特性。当所述比(CS/CB)超过0.6时,难以实现在热成型后通过表层部的软质化来改善弯曲性的效果。对所述比(CS/CB)的下限可以不进行单独限定。但是,当表层部中的C含量过低时,可能会发生热成型后部件的强度降低或疲劳特性变差的问题,因此所述比(CS/CB)的下限可以设为0.05以上,但并不受限于此。
此外,本发明的一个方面的热成型用镀覆钢板中,表层部的Mn和Cr含量之和(MnS+CrS)与基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnS+CrS)/(MnB+CrB))(以下,还称为“比((MnS+CrS)/(MnB+CrB))”)可以为0.8以上。其中,所述表层部是指从除镀层之外的基础钢板的表面到深度为15μm的区域。
另外,根据本发明的一个方面,在所述热成型用镀覆钢板中,表层部的Mn和Cr含量之和(MnS+CrS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnS+CrS)/(MnB+CrB))优选可以为0.85以上,更优选可以为0.87以上。
当所述比((MnS+CrS)/(MnB+CrB))低至小于0.8时,热成型时表层部的淬透性不充分,因此在部件的表面可能会部分地形成铁素体。在硬质的马氏体晶界中部分地形成的铁素体是使弯曲性大幅变差的因素,因此所述比((MnS+CrS)/(MnB+CrB))优选满足0.8以上。无需单独限定所述比((MnS+CrS)/(MnB+CrB))的上限,但当表层部中的Mn和Cr的含量过高时,热成型后表层部的硬度变高,反而可能会发生弯曲性变差的问题。因此,所述比((MnS+CrS)/(MnB+CrB))的上限可以设为2以下,但并不受限于此。
另外,无需特别限定基础钢板的微细组织,但以面积分数计,表层部中可以包含40-100%的铁素体,余量可以包含0-60%的珠光体、贝氏体或马氏体,中心部中可以包含30-90%的铁素体,余量可以包含10-70%的珠光体、贝氏体或马氏体。
冲击特性优异的热成型部件
另外,在Ac3至950℃的温度范围内对由上述组成构成的热成型用镀覆钢板进行热处理1-15分钟后进行热压成型,从而可以制造冲击特性优异的热成型部件。
本发明的一个方面的冲击特性优异的热成型部件包括:基础钢板,其具有与镀覆钢板的基础钢板相同的合金组成;和合金镀层,其形成在所述基础钢板的表面,并且所述合金镀层由包含锌或铝的合金形成,其中,部件表层部的C含量(CPS)与所述基础钢板的C含量(CB)的比(CPS/CB)(以下,还称为“比(CPS/CB)”)可以为1.2以下,部件表层部的Mn和Cr含量之和(MnPS+CrPS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnPS+CrPS)/(MnB+CrB))(以下,还称为“比((MnPS+CrPS)/(MnB+CrB))”)可以为0.8以上。其中,所述部件表层部是指从除所述合金镀层之外的基础钢板的表面到深度为25μm的区域。
另外,根据本发明的一个方面,在所述热成型部件中,部件表层部的C含量(CPS)与所述基础钢板的C含量(CB)的比(CPS/CB)优选可以为1.1以下,更优选可以为1.05以下。
此外,根据本发明的一个方面,在所述热成型部件中,部件表层部的Mn和Cr含量之和(MnPS+CrPS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比优选可以为0.9以上,更优选可以为0.93以上。
通常,为了热成型而对镀覆钢板进行加热时,镀层和基材铁发生合金化且镀层的厚度变厚,由于镀层的C的固溶度极低,在合金化过程中未固溶的C富集在表层部,使得表层部的C含量增加,并且这种表层部的高的C含量导致表层部的硬度增加,因此弯曲性变差。
另一方面,通过对本发明的一个方面的热成型用镀覆钢板进行热压成型来制造热成型部件时,即使C富集在部件表层部,部件表层部的C含量(CPS)与基础钢板的C含量(CB)的比(CPS/CB)为1.2以下,因此可以抑制部件表层部的硬度的过度增加。此外,部件表层部的Mn和Cr含量之和(MnPS+CrPS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnPS+CrPS)/(MnB+CrB))为0.8以上,因此通过充分的淬透性来抑制铁素体的形成,使得部件表层部中的马氏体晶界的铁素体覆盖率(观察截面时,马氏体晶界中铁素体所占的比例)可以为30%以下,其结果可以确保充分的强度和优异的弯曲性。
如上所述,本发明的一个方面的热成型部件的所述比(CS/CB)为1.2以下,并且所述比((MnPS+CrPS)/(MnB+CrB))满足0.8以上,因此在1500MPa的拉伸强度的水平下通过VDA238-100弯曲测试测量的弯曲角度为60°以上,从而可以确保优异的冲击特性。但是,当拉伸强度增加时,例如,热成型部件的拉伸强度为1800MPa级以上时,判断优异的冲击特性的弯曲角度标准可能会更低。
下面,对本发明的另一个方面的制造热成型后的冲击特性优异的热成型用镀覆钢板和热成型部件的方法进行详细说明。
制造热成型后的冲击特性优异的热成型用镀覆钢板的方法
本发明的另一个方面的制造热成型后的冲击特性优异的热成型用镀覆钢板的方法包括以下步骤:将满足上述合金组成的板坯加热至1050-1300℃;在800-950℃的温度范围内对加热的所述板坯进行热精轧以获得热轧钢板;在完成热精轧后,在450-750℃下对所述热轧钢板进行收卷;将收卷的所述热轧钢板加热至740-860℃,并在露点温度为-10℃至30℃的气氛中进行退火10-600秒;以及将退火的所述热轧钢板浸入镀浴中进行镀覆,所述镀浴由锌、铝或包含它们的合金组成。
板坯的加热步骤
首先,将满足上述合金组成的板坯加热至1050-1300℃。当板坯的加热温度低于1050℃时,可能难以实现板坯组织的均质化,当板坯的加热温度超过1300℃时,可能会形成过多的氧化层。
热轧步骤
在800-950℃的温度范围内对加热的所述板坯进行热精轧以获得热轧钢板。当热精轧温度低于800℃时,由于两相区轧制而在钢板的表层部产生混晶组织,因此难以控制板的形状,当热精轧温度超过950℃时,可能会发生晶粒粗大化的问题。
冷却和收卷的步骤
在完成热精轧后,在450-750℃下对所述热轧钢板进行收卷。当收卷温度低于450℃时,宽度方向的材质偏差变大,因此冷轧时可能会发生板断裂和形状不良的问题。另一方面,当收卷温度超过750℃时,由于碳化物的粗大化,存在弯曲性变差的问题。
冷轧步骤
根据需要,在退火之前可以进一步包括对收卷的热轧钢板进行冷轧以获得冷轧钢板的步骤。所述冷轧是为了更精确地控制钢板的厚度而进行的,因此可以省略冷轧并直接进行退火和镀覆。此时,所述冷轧可以以30-80%的压下率进行。
退火步骤
将收卷的所述热轧钢板加热至740-860℃,并在露点温度为-10℃至30℃的气氛中进行退火10-600秒。当退火温度低于740℃或者退火时间少于10秒时,组织的再结晶不充分,因此板的形状不良,或者镀覆后的强度过高,因此在冲裁工艺中可能会引发模具的磨损。不仅如此,在退火过程中C的扩散不充分,因此难以确保表层部的C含量(CS)与基础钢板的C含量(CB)的比(CS/CB)为0.6以下。另一方面,当退火温度超过860℃或者退火时间超过600秒时,在退火过程中在钢板的表面形成大量的退火氧化物,因此可能会引发未镀覆,或者可能会降低镀覆粘附性。此外,由于内部氧化而导致基材铁内的Mn、Cr等形成在镀层和基材铁的界面或基材铁晶界等,因此难以确保表层部的Mn和Cr含量之和(MnS+CrS)与基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnS+CrS)/(MnB+CrB))为0.8以上,使得表层部的淬透性可能会不足,因此在热成型后表层部中部分地形成铁素体,导致可能会发生弯曲性降低的问题。
另外,在本发明中,为了控制表层部中的C、Mn、Cr含量与基础钢板的母材成分的比,控制退火气氛的露点温度是非常重要的。当退火气氛的露点温度低于-10℃时,脱碳反应不充分,因此提高弯曲性的效果不足,另一方面,当露点温度超过30℃时,由于过度的内部氧化,表层部的淬透性降低,导致部分地形成铁素体,因此可能会发生弯曲性变差的问题。
此外,根据本发明的一个方面,更优选地,可以将收卷的热轧钢板加热至800-840℃,并在露点温度为10℃至30℃的气氛中进行所述退火10-100秒。
镀覆步骤
在退火后,将收卷的热轧钢板浸入镀浴中进行镀覆,所述镀浴由锌、铝或包含它们的合金组成。本发明中可以对形成镀层时使用的镀浴的成分不作特别限制。但是,作为一个非限制性的具体实施方案,本发明中使用的镀浴可以由锌、锌合金、铝、铝合金组成。此外,镀覆条件只要是通常用于热压成型用钢板的镀覆条件,则可以不受限制地用于本发明中,因此在本说明书中不特别提及。此外,根据本发明的一个方面,所述镀浴可以包含其它不可避免的杂质,在不损害本发明的目的的范围内,所述锌合金和铝合金也可以包含通常可以包含的成分,特别是可以包含其它不可避免的杂质。
制造冲击特性优异的热成型部件的方法
可以通过对根据上述本发明的制造方法制造的热成型用镀覆钢板进行热压成型来制造冲击特性优异的热成型部件。此时,所述热压成型可以使用本技术领域中通常利用的方法。但是,作为一个非限制性的具体实施方案,可以在Ac3至950℃的温度范围内对热成型用镀覆钢板进行热处理1-15分钟后通过冲压进行热成型。
具体实施方式
以下,通过实施例对本发明进行更具体的说明。但是,需要注意的是,下述实施例仅仅是用于例示本发明以进行具体的说明,并不是用于限制本发明的权利范围。这是因为本发明的权利范围是由权利要求书中记载的内容和由此合理推导的内容所决定。
(实施例)
首先,准备具有下表1中示出的合金组成的板坯,并根据下表2中示出的制造条件,对所述板坯进行加热、热轧、收卷,从而制造热轧钢板。之后,根据表2中示出的退火条件进行退火,然后浸入锌镀浴中进行镀覆,使得以单面为基准的镀覆量为70g/m2,从而制造镀覆钢板。
[表1]
类别 C Si Mn P S Al N Cr Ti B
钢种A 0.21 0.25 1.3 0.01 0.002 0.035 0.005 0.22 0.03 0.0022
钢种B 0.2 0.1 2.5 0.009 0.001 0.03 0.004 0.1 - -
[表2]
对于根据所述制造条件制造的发明例和比较例的镀覆钢板,利用可以在深度方向上进行各种成分的定量分析的辉光放电光谱仪(Glow Discharge Spectrometer,GDS;使用美国力可(LECO)公司的GDS 850A)方法,对从表层到深度方向上的充分的深度中的碳(C)、锰(Mn)和铬(Cr)的浓度进行分析,并根据GDS分析结果,利用积分法分析属于表层部的区域的平均含量,然后将其结果示于下表3中。通常,在GDS分析的情况下,对于2-6mm的圆形面积进行深度方向上的分析,因此难以根据深度方向上的浓度分布指定准确的镀层/基础钢板的界面,但基于各种光学和SEM的分析结果等,本发明中将Zn含量为1%的位置处作为镀层/基础钢板的界面。
[表3]
此外,对于各发明例和比较例的镀覆钢板,根据下表4中记载的条件进行热压成型,从而制造热成型部件。在所制造的热成型部件的平面部位采集试片,并进行拉伸试验和弯曲试验(VDA238-100),通过GDS分析在深度方向上对碳(C)、锰(Mn)和铬(Cr)的浓度进行分析,而且通过光学显微镜观察截面来评价部件表层部的马氏体晶界中的铁素体覆盖率,并将其结果一同示于表4中。
[表4]
根据本发明的条件制造的发明例1和发明例2的镀覆钢板的比(CS/CB)为0.6以下,并且比((MnS+CrS)/(MnB+CrB))满足0.8以上。因此,通过对所述发明例1和发明例2的镀覆钢板进行热压成型而制造的热成型部件的比(CPS/CB)为1.2以下,并且比((MnPS+CrPS)/(MnB+CrB))满足0.8以上,从而表层部的马氏体晶界中的铁素体覆盖率为30%以下,并且在1500MPa级的拉伸强度下的弯曲角度为60°以上,因此显示出良好的弯曲特性。
比较例1是退火时的露点温度低于-10℃的情况,比较例2是退火时的加热温度未达到本发明的条件的情况,比较例1和比较例2的镀覆钢板的比(CS/CB)均超过0.6,因此热成型部件中的比(CPS/CB)也超过1.2,从而弯曲特性变差。
另外,比较例3是退火时的露点温度超过30℃的情况,比较例4是过度进行退火的情况,比较例3和比较例4的镀覆钢板的比(CS/CB)均满足本发明的条件,但比((MnS+CrS)/(MnB+CrB))小于0.8,并且热成型部件的比((MnPS+CrPS)/(MnB+CrB))小于0.8。因此,部件表层部的马氏体晶界中的铁素体覆盖率超过30%,并且与其它实施例相比,拉伸强度相对降低的同时弯曲性也大幅降低。
以上通过参考实施例进行了说明,但本领域技术人员可以理解在不脱离权利要求书中记载的本发明的思想和领域的范围内可以对本发明进行各种修改和改变。

Claims (10)

1.一种热成型用镀覆钢板,其包括:
基础钢板;和
镀层,其形成在所述基础钢板的表面,并且所述镀层由锌、铝或包含它们的合金形成,
其中,表层部的C含量(CS)与所述基础钢板的C含量(CB)的比(CS/CB)为0.6以下,
表层部的Mn和Cr含量之和(MnS+CrS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnS+CrS)/(MnB+CrB))为0.8以上,
其中,所述表层部是指从除所述镀层之外的基础钢板的表面到深度为15μm的区域。
2.根据权利要求1所述的热成型用镀覆钢板,其中,所述镀层是热浸镀锌层、电镀锌层、合金化锌镀层、铝镀层或铝合金镀层。
3.根据权利要求1或2所述的热成型用镀覆钢板,其中,所述镀层的厚度为5-100μm。
4.根据权利要求1所述的热成型用镀覆钢板,其中,表层部的C含量(CS)与所述基础钢板的C含量(CB)的比(CS/CB)为0.05以上。
5.根据权利要求1或4所述的热成型用镀覆钢板,其中,表层部的Mn和Cr含量之和(MnS+CrS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnS+CrS)/(MnB+CrB))为0.2以下。
6.根据权利要求1所述的热成型用镀覆钢板,其中,所述基础钢板的微细组织中,以面积%计,
所述表层部中包含40-100%的铁素体,余量包含0-60%的珠光体、贝氏体或马氏体,
中心部中包含30-90%的铁素体,余量包含10-70%的珠光体、贝氏体或马氏体。
7.一种热成型部件,其包括:
基础钢板;和
合金镀层,其形成在所述基础钢板的表面,并且所述合金镀层由包含锌或铝的合金形成,
其中,部件表层部的C含量(CPS)与所述基础钢板的C含量(CB)的比(CPS/CB)为1.2以下,
部件表层部的Mn和Cr含量之和(MnPS+CrPS)与所述基础钢板的Mn和Cr含量之和(MnB+CrB)的比((MnPS+CrPS)/(MnB+CrB))为0.8以上,
其中,所述部件表层部是指从除所述合金镀层之外的基础钢板的表面到深度为25μm的区域。
8.根据权利要求7所述的热成型部件,其中,所述镀层是合金化锌镀层或铝合金镀层。
9.根据权利要求7所述的热成型部件,其中,所述部件表层部的马氏体晶界中的铁素体覆盖率为30%以下。
10.根据权利要求7或9所述的热成型部件,其中,所述热成型部件的通过VDA238-100弯曲测试测量的弯曲角度为60°以上。
CN202310549754.1A 2018-12-19 2019-12-19 热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法 Pending CN116555668A (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2018-0164822 2018-12-19
KR1020180164822A KR102165223B1 (ko) 2018-12-19 2018-12-19 열간성형 후 충격특성이 우수한 열간성형용 도금강판, 열간성형 부재 및 이들의 제조방법
CN201980084549.4A CN113195774B (zh) 2018-12-19 2019-12-19 热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法
PCT/KR2019/018086 WO2020130666A1 (ko) 2018-12-19 2019-12-19 열간성형 후 충격특성이 우수한 열간성형용 도금강판, 열간성형 부재 및 이들의 제조방법

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN201980084549.4A Division CN113195774B (zh) 2018-12-19 2019-12-19 热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法

Publications (1)

Publication Number Publication Date
CN116555668A true CN116555668A (zh) 2023-08-08

Family

ID=71102601

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201980084549.4A Active CN113195774B (zh) 2018-12-19 2019-12-19 热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法
CN202310549754.1A Pending CN116555668A (zh) 2018-12-19 2019-12-19 热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN201980084549.4A Active CN113195774B (zh) 2018-12-19 2019-12-19 热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法

Country Status (8)

Country Link
US (1) US20220025479A1 (zh)
EP (1) EP3901315A4 (zh)
JP (2) JP7280364B2 (zh)
KR (1) KR102165223B1 (zh)
CN (2) CN113195774B (zh)
DE (1) DE202019006085U1 (zh)
MX (1) MX2021006813A (zh)
WO (1) WO2020130666A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220088232A (ko) * 2020-12-18 2022-06-27 주식회사 포스코 내수소취성 및 내충돌성이 우수한 열간성형용 도금강판, 열간성형 부재 및 이들의 제조방법
WO2024122123A1 (ja) * 2022-12-09 2024-06-13 日本製鉄株式会社 めっき鋼板
WO2024122124A1 (ja) * 2022-12-09 2024-06-13 日本製鉄株式会社 ホットスタンプ成形体
WO2024122118A1 (ja) * 2022-12-09 2024-06-13 日本製鉄株式会社 めっき鋼板
WO2024122117A1 (ja) * 2022-12-09 2024-06-13 日本製鉄株式会社 ホットスタンプ成形体
KR20240087218A (ko) * 2022-12-12 2024-06-19 주식회사 포스코 도금강판 및 그 제조방법
WO2024203603A1 (ja) * 2023-03-30 2024-10-03 株式会社神戸製鋼所 ホットスタンプ用亜鉛系めっき鋼板およびその製造方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2780984B1 (fr) 1998-07-09 2001-06-22 Lorraine Laminage Tole d'acier laminee a chaud et a froid revetue et comportant une tres haute resistance apres traitement thermique
JP4500124B2 (ja) * 2004-07-23 2010-07-14 新日本製鐵株式会社 ホットプレス用めっき鋼板の製造方法
JP4449795B2 (ja) * 2005-03-22 2010-04-14 住友金属工業株式会社 熱間プレス用熱延鋼板およびその製造方法ならびに熱間プレス成形部材の製造方法
JP5223360B2 (ja) * 2007-03-22 2013-06-26 Jfeスチール株式会社 成形性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法
KR101062036B1 (ko) 2008-10-28 2011-09-02 현대제철 주식회사 용접 및 충격특성이 우수한 열처리 경화형 강판 및 그 제조방법
DE102009044861B3 (de) 2009-12-10 2011-06-22 ThyssenKrupp Steel Europe AG, 47166 Verfahren zum Herstellen eines gut umformbaren Stahlflachprodukts, Stahlflachprodukt und Verfahren zur Herstellung eines Bauteils aus einem solchen Stahlflachprodukt
WO2014037627A1 (fr) * 2012-09-06 2014-03-13 Arcelormittal Investigación Y Desarrollo Sl Procede de fabrication de pieces d'acier revêtues et durcies a la presse, et tôles prerevêtues permettant la fabrication de ces pieces
KR101482345B1 (ko) 2012-12-26 2015-01-13 주식회사 포스코 고강도 열연강판, 이를 이용한 용융아연도금강판, 합금화 용융아연도금강판 및 이들의 제조방법
WO2014166630A1 (en) * 2013-04-10 2014-10-16 Tata Steel Ijmuiden Bv Product formed by hot forming of metallic coated steel sheet, method to form the product, and steel strip
KR101561008B1 (ko) * 2014-12-19 2015-10-16 주식회사 포스코 구멍확장능이 우수한 용융아연도금강판, 합금화 용융아연도금강판 및 그 제조방법
KR101569508B1 (ko) 2014-12-24 2015-11-17 주식회사 포스코 굽힘 특성이 우수한 hpf 성형부재 및 그 제조방법
EP3287539B1 (en) * 2015-04-22 2019-12-18 Nippon Steel Corporation Plated steel sheet
KR101758485B1 (ko) 2015-12-15 2017-07-17 주식회사 포스코 표면품질 및 점 용접성이 우수한 고강도 용융아연도금강판 및 그 제조방법
KR101967959B1 (ko) * 2016-12-19 2019-04-10 주식회사 포스코 굽힘 가공성이 우수한 초고강도 강판 및 이의 제조방법
KR101858868B1 (ko) 2016-12-23 2018-05-16 주식회사 포스코 충격특성이 우수한 열간성형용 도금강판, 열간성형 부재 및 그들의 제조방법
JP6916129B2 (ja) * 2018-03-02 2021-08-11 株式会社神戸製鋼所 ホットスタンプ用亜鉛めっき鋼板およびその製造方法

Also Published As

Publication number Publication date
KR20200076773A (ko) 2020-06-30
DE202019006085U1 (de) 2024-09-18
EP3901315A1 (en) 2021-10-27
JP2022513264A (ja) 2022-02-07
CN113195774A (zh) 2021-07-30
JP2023100953A (ja) 2023-07-19
CN113195774B (zh) 2023-06-20
KR102165223B1 (ko) 2020-10-13
US20220025479A1 (en) 2022-01-27
WO2020130666A1 (ko) 2020-06-25
MX2021006813A (es) 2021-07-02
EP3901315A4 (en) 2021-11-17
JP7280364B2 (ja) 2023-05-23

Similar Documents

Publication Publication Date Title
CN113195774B (zh) 热成型后的冲击特性优异的热成型用镀覆钢板、热成型部件和它们的制造方法
JP6428970B1 (ja) ホットプレス部材およびその製造方法
US20220162720A1 (en) Plated steel sheet for hot press forming having excellent impact property, hot press formed part, and manufacturing method thereof
KR102296359B1 (ko) 열간 프레스 부재 및 그 제조 방법 그리고 열간 프레스용 냉연 강판 및 그 제조 방법
US11846003B2 (en) High-strength steel sheet and method for manufacturing the same
JP6474415B2 (ja) 優れた曲げ性及び超高強度を有する熱間プレス成形品用鋼板、これを利用した熱間プレス成形品及びこれらの製造方法
US20110030854A1 (en) High-strength steel sheet and method for manufacturing the same
JP7239066B2 (ja) 鋼板、部材およびそれらの製造方法
JP5126844B2 (ja) 熱間プレス用鋼板およびその製造方法ならびに熱間プレス鋼板部材の製造方法
US20180037969A1 (en) High-strength cold-rolled steel sheet and method of producing the same
US20210402740A1 (en) Steel sheet for hot press and manufacturing method thereof
CN108779536B (zh) 钢板、镀覆钢板和它们的制造方法
JP5979326B1 (ja) 高強度めっき鋼板およびその製造方法
EP4180547A1 (en) Hot-pressed member and manufacturing method therefor
CN116848282A (zh) 热成型用钢材、热成型部件及它们的制造方法
JPH06145891A (ja) 延性と耐遅れ破壊特性に優れた高強度冷延鋼板およびその製造方法
CN110073023B (zh) 弯曲性和延伸凸缘性优异的高张力钢及其制造方法
KR20210080664A (ko) 연성 및 가공성이 우수한 강판 및 이의 제조방법
KR102468043B1 (ko) 표면품질 및 크랙 저항성이 우수한 초고강도 아연도금강판 및 이의 제조방법
EP4431630A1 (en) Ultrahigh-strength steel sheet with excellent bendability and stretch flangeability, and manufacturing method therefor
KR102510214B1 (ko) 액체금속취성을 방지하는 철-니켈 합금층을 포함한 핫스탬핑 용융아연도금 강재, 핫스탬핑 부품 및 그 제조방법
JP7239067B2 (ja) 鋼板、部材およびそれらの製造方法
KR102307927B1 (ko) 내구성 및 연신율이 우수한 후물 변태조직강 및 그 제조방법
WO2024053736A1 (ja) 鋼板及びその製造方法
CN118284716A (zh) 冷轧钢板及其制造方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination