WO2018123831A1 - Tôle d'acier plaquée pour formage à chaud à la presse, son procédé de fabrication, procédé de fabrication d'un article formé à chaud à la presse et procédé de fabrication de véhicule - Google Patents

Tôle d'acier plaquée pour formage à chaud à la presse, son procédé de fabrication, procédé de fabrication d'un article formé à chaud à la presse et procédé de fabrication de véhicule Download PDF

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Publication number
WO2018123831A1
WO2018123831A1 PCT/JP2017/046035 JP2017046035W WO2018123831A1 WO 2018123831 A1 WO2018123831 A1 WO 2018123831A1 JP 2017046035 W JP2017046035 W JP 2017046035W WO 2018123831 A1 WO2018123831 A1 WO 2018123831A1
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Prior art keywords
steel sheet
zinc
plated steel
hot
metal soap
Prior art date
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PCT/JP2017/046035
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English (en)
Japanese (ja)
Inventor
雅寛 久保
嘉明 中澤
鈴木　利哉
野村　成彦
宗士 藤田
秀昭 入川
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新日鐵住金株式会社
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Application filed by 新日鐵住金株式会社 filed Critical 新日鐵住金株式会社
Priority to KR1020197018677A priority Critical patent/KR102037085B1/ko
Priority to RU2019123276A priority patent/RU2710396C1/ru
Priority to EP17886827.9A priority patent/EP3564409A4/fr
Priority to JP2018518669A priority patent/JP6369659B1/ja
Priority to CA3048362A priority patent/CA3048362C/fr
Priority to CN201780080183.4A priority patent/CN110114510B/zh
Priority to MX2019007700A priority patent/MX2019007700A/es
Priority to BR112019013257A priority patent/BR112019013257A2/pt
Priority to US16/474,512 priority patent/US20200024748A1/en
Publication of WO2018123831A1 publication Critical patent/WO2018123831A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
    • 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
    • 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
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • 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
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
    • C23C18/1208—Oxides, e.g. ceramics
    • C23C18/1216—Metal oxides
    • 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
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12—Aluminium or alloys based thereon
    • 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
    • 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
    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
    • C23C22/66—Treatment of aluminium 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
    • C—CHEMISTRY; METALLURGY
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    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer

Definitions

  • the present disclosure relates to a hot-pressed plated steel sheet, a hot-pressed plated steel sheet manufacturing method, a hot-press molded product manufacturing method, and a vehicle manufacturing method.
  • a material having a high mechanical strength tends to have a low shape freezing property in a forming process such as a bending process.
  • a forming process such as a bending process.
  • the process itself becomes difficult.
  • hot press method hot press method, high temperature press method, die quench method.
  • a material to be molded is once heated to a high temperature, the material softened by heating is pressed and molded, and then cooled.
  • this hot pressing method since the material is once heated to a high temperature and softened, the material can be easily pressed. Therefore, a molded product having both good shape freezing property and high mechanical strength can be obtained by this hot pressing. In particular, when the material is steel, the mechanical strength of the press-formed product can be increased due to the quenching effect by cooling after forming.
  • An example of a method for suppressing such a decrease in productivity is a method of coating a steel sheet.
  • various materials such as organic materials and inorganic materials are used as the coating on the steel plate.
  • zinc-based plated steel sheets that have sacrificial anticorrosive action on steel sheets are widely used for automobile steel sheets and the like from the viewpoint of their anticorrosive performance and steel sheet production technology.
  • the heating temperature in the hot pressing is aimed at a temperature higher than the Ac3 transformation point of steel in order to obtain a quenching effect. That is, the heating temperature is about 700 to 1000 ° C. However, this heating temperature is higher than the decomposition temperature of organic materials, the boiling point of metallic materials such as Zn materials, and the like. For this reason, when heated for hot pressing, the plating layer on the surface evaporates, which may cause significant deterioration of the surface properties.
  • Patent Document 1 discloses a method in which an aluminum-plated steel sheet in which an Al-based metal coating is applied to steel having a predetermined steel component is used for hot pressing.
  • an Al-based metal coating is applied, depending on the preheating conditions before the press working in the hot press method, the Al coating is first melted, and then an Al—Fe compound layer is formed by Fe diffusion from the steel plate. .
  • the Al—Fe compound layer may grow and become an Al—Fe compound layer up to the surface of the steel sheet.
  • this compound layer is referred to as an alloy layer. Since this alloy layer is extremely hard, a processing flaw is formed by contact with a mold during press working.
  • Patent Document 2 discloses that a wurtzite-type compound film such as a ZnO film is aluminized steel sheet for the purpose of improving chemical treatment and corrosion resistance as well as hot lubricity to prevent the occurrence of processing flaws. A method of forming on the surface is disclosed.
  • Patent Document 3 discloses that one or more Zn compounds selected from the group consisting of Zn hydroxide, Zn phosphate, and organic acid Zn are used for the purpose of enhancing the adhesion of the ZnO film during press molding.
  • a method for forming a film on the surface of an Al-plated steel sheet is disclosed.
  • a ZnO film is formed by heat when hot-pressing an aluminum-plated steel sheet on which a Zn compound film is formed, and a ZnO film having excellent adhesion is formed. Lubricity, film adhesion, spot weldability, and post-coating corrosion resistance can be improved.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2000-38640
  • Patent Document 2 International Publication No. 2009/131233
  • Patent Document 3 Japanese Patent Application Laid-Open No. 2014-139350
  • the subject of 1 aspect of this indication is providing the plated steel plate for hot press which suppresses generation
  • Another problem of one aspect of the present disclosure is a method for producing a hot press-formed product that uses the hot-pressed plated steel sheet and suppresses the occurrence of wear on the sliding surface of the hot press die, And it is providing the manufacturing method of the vehicle using the press molding manufactured by the manufacturing method of a hot press molding.
  • the gist of the present disclosure is as follows.
  • a plated steel sheet body having a steel sheet and an aluminum plating layer provided on one or both surfaces of the steel sheet;
  • a zinc-based metal soap film provided on the surface of the plated steel sheet body on the side of the aluminum plating layer and having an adhesion amount of 7.1 to 19.8 g / m 2 in terms of Zn amount;
  • a hot-pressed plated steel sheet
  • a plated steel sheet body having a steel sheet, an aluminum plating layer provided on one or both surfaces of the steel sheet, and a zinc oxide film provided on the surface of the aluminum plating layer;
  • a zinc-based metal soap film provided on the surface of the zinc oxide film of the plated steel sheet body;
  • the total adhesion amount of the zinc oxide film and the zinc-based metal soap film is 7.1 to 19.8 g / m 2 in terms of Zn content.
  • more than half of the total amount of adhesion of the zinc oxide film and the zinc-based metal soap film is the amount of adhesion of the zinc-based metal soap film Plated steel sheet.
  • the zinc-based metal soap film is a film of at least one zinc-based metal soap selected from the group consisting of zinc bisoctanoate, zinc octylate, zinc laurate, and zinc stearate.
  • a plated steel sheet for hot pressing as set forth in any one of the above items.
  • a plated steel sheet body having a steel sheet and an aluminum plating layer provided on one or both surfaces of the steel sheet; A zinc oxide film provided on the surface of the plated steel sheet body on the aluminum plating layer side; Have A plated steel sheet for hot pressing, wherein the maximum value of the skewness Rsk of the surface roughness curve of the zinc oxide film is less than 0.
  • the adhesion amount of the adhesion portion is 7.1 to 19.8 g in terms of Zn amount.
  • ⁇ 8> In the step of forming the zinc-based metal soap film, more than half of the total adhesion amount of the zinc oxide film and the zinc oxide film is defined as the adhesion amount of the adhesion part of the zinc-based metal soap film.
  • ⁇ 9> The method for producing a hot-pressed plated steel sheet according to any one of ⁇ 6> to ⁇ 8>, further comprising a step of heating the zinc-based metal soap film at 300 ° C. or more to form a zinc oxide film.
  • ⁇ 10> The method for producing a hot-pressed plated steel sheet according to ⁇ 9>, wherein the maximum value of the skewness Rsk of the surface roughness curve of the zinc oxide film formed by heating the zinc-based metal soap film is less than 0. ⁇ 11> ⁇ 6> to ⁇ 10>, wherein the zinc-based metal soap film is a film of at least one zinc-based metal soap selected from the group consisting of zinc bisoctanoate, zinc octylate, zinc laurate, and zinc stearate.
  • a hot pressing step for hot press forming the plated steel sheet for hot pressing A method for producing a hot press-formed product having ⁇ 13>
  • ⁇ 14> ⁇ 12> or ⁇ 13> The manufacturing method of the vehicle which attaches the press molded product manufactured by the manufacturing method of the hot press molded product as described in ⁇ 13> toward the outer side of a vehicle with a surface with a zinc oxide film.
  • a hot-pressed plated steel sheet that suppresses the occurrence of wear on the sliding surface of the hot-press mold and a method for manufacturing the hot-pressed plated steel sheet.
  • a method for manufacturing a hot press-formed product that uses the hot-pressed plated steel sheet and suppresses the occurrence of scratches on the sliding surface of the hot press die, and The manufacturing method of the vehicle using the press-molded product manufactured by the manufacturing method of the hot press-formed product can be provided.
  • the hot-pressed plated steel sheet (hereinafter also referred to as “plated steel sheet”) according to the present embodiment includes a steel sheet and an aluminum plated layer (hereinafter also referred to as “Al plated layer”) provided on one or both surfaces of the steel sheet. And a zinc-based metal soap film provided on the surface of the plated steel sheet on the side of the Al plating layer and having an adhesion amount of 7.1 to 19.8 g / m 2 in terms of Zn amount.
  • Al plated layer aluminum plated layer
  • the plated steel sheet body may have a zinc oxide film (hereinafter also referred to as “ZnO film”) provided on the Al plating layer.
  • ZnO film zinc oxide film
  • the adhesion amount of the total adhesion part of the ZnO film and the zinc-based metal soap film is 7.1 to 19.8 g / m 2 in terms of Zn amount.
  • the plated steel sheet according to the present embodiment suppresses the occurrence of wear on the sliding surface of a hot press die (hereinafter also referred to as “die”) when hot press-molded by the above configuration. And the plated steel plate which concerns on this embodiment was discovered by the knowledge shown below.
  • the inventors have found that the following is effective in suppressing wear of the sliding surface of the mold. 1) Applying a lubricant to improve the smoothness of the ZnO film. 2) Use zinc-based metal soap containing Zn as a lubricant in consideration of chemical conversion properties after hot press molding and corrosion resistance. Specifically, the inventors have found the following.
  • Zinc-based metal soap is used in lubricant applications, so if the amount of adhesion is increased, the surface of the underlying plated steel sheet body (Al-plated layer or ZnO film) is hardly affected, and the zinc-based metal has high smoothness.
  • a soap film can be formed (see FIG. 1A: in FIG. 1A, 10 indicates a plated steel sheet, 10A indicates a plated steel sheet body, 12 indicates a steel sheet, 14 indicates an Al plating layer, 16 indicates a ZnO film, and 18 indicates a zinc-based metal soap film.
  • This zinc-based metal soap film becomes a ZnO film as a result of the oxidation of zinc and the decomposition of organic substances other than zinc (fatty acids, etc.) by heating before pressing in hot press molding. That is, at the time of hot press forming, a ZnO film having high smoothness (for example, a ZnO film having a maximum skewness Rsk of the surface roughness curve of less than 0) is formed on the surface of the plated steel sheet. In addition, it is good also as a ZnO film
  • the ZnO film on the outermost surface of the plated steel sheet is smooth, the surface pressure applied to the ZnO film from the sliding surface that slides on the mold is reduced when the plated steel sheet is hot press formed. That is, the ZnO film of the plated steel sheet and the sliding surface of the mold come into surface contact with each other, the real contact area between the ZnO film of the plated steel sheet and the sliding surface of the mold increases, and the contact surface pressure is reduced. For this reason, peeling of the ZnO film is suppressed (see FIG. 1B: in FIG.
  • 10 is a plated steel sheet
  • 10A is a plated steel sheet body
  • 12 is a steel sheet
  • 14 is an Al plating layer
  • 16 is a ZnO film
  • 18A is a zinc-based metal.
  • ZnO film formed from a soap film, 26 indicates a mold). Since the exfoliation of the ZnO film is suppressed, it is possible to prevent the metal mold and the Al plating layer from contacting and reacting to generate an intermetallic compound. As a result, since the production
  • the inventors have found that the plated steel sheet according to the present embodiment suppresses the occurrence of wear on the sliding surface of the hot press die when hot press-molded by the above configuration. .
  • the inventors have also found the following.
  • a ZnO film formed from a zinc-based metal soap film is difficult to peel off during and after hot press molding, and wear of the mold hardly occurs. Therefore, a molded product having high mass productivity, high chemical conversion property, excellent adhesion between the Al plating layer after molding and the ZnO film, and high corrosion resistance (that is, corrosion resistance after coating) can be obtained.
  • the plated steel sheet body includes a steel sheet and an Al plating layer provided on one or both surfaces of the steel sheet. And the plated steel plate body may have a ZnO film provided on the Al plating layer.
  • steel sheet As a steel plate (steel plate before plating), for example, mechanical deformation such as high mechanical strength (for example, tensile strength, yield point, elongation, drawing, hardness, impact value, fatigue strength, creep strength, and the like) It is preferable to use a steel sheet formed so as to have various properties related to fracture.
  • high mechanical strength for example, tensile strength, yield point, elongation, drawing, hardness, impact value, fatigue strength, creep strength, and the like
  • steel sheet formed so as to have various properties related to fracture.
  • An example of the steel plate (steel plate before plating) that realizes high mechanical strength used in the plated steel plate according to this embodiment is as follows.
  • the description of% means the mass% unless there is particular notice.
  • the steel sheet is, by mass%, C: 0.1 to 0.6%, Si: 0.01 to 0.6%, Mn: 0.5 to 3%, Ti: 0.01 to 0.1%, and B: preferably contains at least one of 0.0001 to 0.1%, and consists of the remainder Fe and impurities.
  • C is included to ensure the desired mechanical strength.
  • C is less than 0.1%, sufficient mechanical strength cannot be improved, and the effect of containing C becomes poor.
  • C exceeds 0.6%, the steel sheet can be further hardened, but melt cracking tends to occur. Therefore, the C content is preferably 0.1% or more and 0.6% or less.
  • Si is one of the strength improving elements for improving the mechanical strength, and is contained in the same manner as C to ensure the desired mechanical strength.
  • Si is less than 0.01%, it is difficult to exert the effect of improving the strength and sufficient mechanical strength cannot be improved.
  • Si is also an easily oxidizable element. Therefore, when Si exceeds 0.6%, wettability is lowered when hot-dip aluminum plating is performed, and non-plating may occur. Therefore, the Si content is preferably 0.01% or more and 0.6% or less.
  • Mn is one of the strengthening elements that strengthens steel and is also one of the elements that enhances hardenability. Further, Mn is effective in preventing hot brittleness due to S which is one of impurities. When Mn is less than 0.5%, these effects cannot be obtained, and the above effects are exhibited when 0.5% or more. On the other hand, when Mn exceeds 3%, there is a possibility that the residual ⁇ phase becomes excessive and the strength is lowered. Therefore, the Mn content is preferably 0.5% or more and 3% or less.
  • Ti is one of strength-enhancing elements and is an element that improves the heat resistance of the Al plating layer.
  • Ti is less than 0.01%, the effect of improving the strength and the effect of improving the oxidation resistance cannot be obtained, and these effects are exhibited when the content is 0.01% or more.
  • the Ti content is preferably 0.01% or more and 0.1% or less.
  • B has the effect of increasing the strength by acting during quenching.
  • B is less than 0.0001%, such an effect of improving the strength is low.
  • B exceeds 0.1%, inclusions are formed and become brittle, which may reduce the fatigue strength. Therefore, the B content is preferably 0.0001% or more and 0.1% or less.
  • this steel plate may contain impurities that are mixed in in other manufacturing processes.
  • a steel plate formed of such chemical components is quenched by heating by a hot press method or the like, and can have a mechanical strength of about 1500 MPa or more. Although it is a steel plate having such a high mechanical strength, since it can be hot-pressed in a state softened by heating, it can be easily formed if it is processed by a hot pressing method. Further, the steel sheet can realize high mechanical strength, and can maintain or improve the mechanical strength even if it is thinned for weight reduction.
  • Al plating layer is formed on one side or both sides of the steel plate before plating.
  • the Al plating layer is formed on one or both surfaces of a steel plate by, for example, a hot dipping method, but the forming method is not limited to this.
  • the component composition of the Al plating layer may contain 50% or more of Al.
  • Elements other than Al are not particularly limited, but Si may be positively contained for the following reasons.
  • the Si content in the Al plating layer is preferably 3 to 15%.
  • ⁇ Al plating layer prevents corrosion of steel sheet. Further, when the plated aluminum sheet is processed by a hot press method, the Al plating layer does not generate scale (iron oxide) due to oxidation of the surface even when heated to a high temperature. By preventing the generation of scale in the Al plating layer, the scale removal process, the surface cleaning process, the surface treatment process, and the like can be omitted, and the productivity of the molded product is improved. Moreover, the Al plating layer has a boiling point and a melting point higher than those of a plating layer made of an organic material or a plating layer made of another metal material (for example, a Zn material). Therefore, when forming by hot press forming, the plating layer does not evaporate, so hot press forming at a high temperature is possible. Therefore, the moldability in the hot press molding can be further enhanced and molding can be easily performed.
  • scale iron oxide
  • the Al plating layer can be alloyed with Fe in the steel sheet by heating at the time of hot dipping and hot pressing. Therefore, the Al plating layer is not necessarily formed of a single layer having a constant component composition, and includes a partially alloyed layer (alloy layer).
  • ZnO film A ZnO film (film containing ZnO) is formed on the surface of the Al plating layer of the plated steel sheet body as necessary.
  • the ZnO film is preferably formed on the entire surface of the Al plated layer of the plated steel sheet body. In the region where the ZnO film is the outermost surface layer of the plated steel sheet, the ZnO film imparts hot lubricity, chemical conversion property, and corrosion resistance to the plated steel sheet.
  • the formation method of the ZnO film is not particularly limited, and can be formed on the Al plating layer by the methods described in Patent Documents 1 and 2, for example.
  • the adhesion amount of the adhesion portion of the ZnO film (hereinafter also simply referred to as “adhesion amount”) is preferably 0.5 to 7 g / m 2 in terms of Zn amount per one side of the steel sheet.
  • the ZnO film adhesion amount is 0.5 g / m 2 or more in terms of Zn amount, the lubrication improving effect can be effectively exhibited in a region in contact with other than the sliding surface of the mold in hot press molding. it can.
  • the adhesion amount of the ZnO film is particularly preferably about 1 to 4 g / m 2 in terms of Zn amount per one surface of the steel sheet, and lubrication during hot pressing is performed in a region in contact with other than the sliding surface of the mold in hot press forming. In addition, the weldability and paint adhesion can be improved.
  • a fluorescent X ray method is utilized as a measuring method of the adhesion amount of a ZnO film
  • a calibration curve is created using several types of standard samples with a known amount of ZnO film deposited (in terms of Zn content) by the fluorescent X-ray method, and the Zn intensity of the sample to be measured is measured using the ZnO film.
  • the adhesion amount the adhesion amount of the ZnO film is obtained.
  • a zinc-based metal soap film (a film containing a zinc-based metal soap) is provided on the surface of the plated steel sheet on the Al plating layer side. Specifically, when the ZnO film is not provided on the Al plating layer of the plated steel sheet body, the zinc-based metal soap film is provided on the surface (entire surface) of the Al plating layer. On the other hand, when the ZnO film is provided on the Al plating layer of the plated steel sheet body, the zinc-based metal soap film is provided on at least a part of the surface of the ZnO film.
  • the metal soap of the zinc-based metal soap film includes a metal salt (fatty acid zinc salt) of a fatty acid (for example, a fatty acid having 7 to 20 carbon atoms) and zinc.
  • the fatty acid may be either a saturated fatty acid or an unsaturated fatty acid.
  • the metal soap of the zinc-based metal soap film is preferably a liquid metal soap at room temperature (25 ° C.).
  • Specific examples of the zinc-based metal soap film include at least one zinc-based metal soap film selected from the group consisting of zinc bisoctanoate, zinc octylate, zinc laurate, and zinc stearate. .
  • the zinc-based metal soap film is formed using a zinc-based metal soap for lubricants, it is a highly smooth film.
  • the zinc-based metal soap film for example, is oxidized by heating at 300 ° C. or higher (heating before hot press molding, or prior heating before hot press molding), and other than zinc. Organic substances (such as fatty acids) are decomposed to form a ZnO film. That is, the area
  • a ZnO film having high smoothness for example, a ZnO film in which the maximum value of the skewness Rsk of the surface roughness curve satisfies Rsk ⁇ 0
  • a ZnO film having high smoothness for example, a ZnO film in which the maximum value of the skewness Rsk of the surface roughness curve satisfies Rsk ⁇ 0
  • the adhesion amount of the adhesion part of the zinc-based metal soap film (hereinafter also simply referred to as “adhesion amount”) is 7.1 to 19.8 g / m 2 in terms of Zn amount, preferably 8.82 to 16.
  • the adhesion amount is in the range of 8.9 to 19.8 g / m 2 , 9.2 to 19.8 g / m 2 , or 9.5 to 19.8 g / m 2 in terms of Zn amount. There may be.
  • the plated steel sheet body has a ZnO film (that is, when a zinc-based metal soap film is formed on the surface of the ZnO film of the plated steel sheet body), the amount of zinc-based metal soap film deposited is It is necessary to consider that the surface of the ZnO film is smooth in both the ZnO film and the ZnO film formed from the zinc-based metal soap film. Therefore, the total adhesion amount of the zinc-based metal soap film to the adhesion amount of the ZnO film on the plated steel sheet body (the total adhesion amount of the ZnO film and the zinc-based metal soap film on the plating steel sheet body) is 7.
  • the adhesion amount is in the range of 8.9 to 16.3 g / m 2 , 9.2 to 16.3 g / m 2 , or 9.5 to 16.3 g / m 2 in terms of Zn amount. There may be.
  • the surface smoothness of the ZnO film formed from the zinc-based metal soap film is increased. From the viewpoint, it is preferable that more than half of the total adhesion amount of the ZnO film and the zinc oxide film is the adhesion amount of the zinc-based metal soap film.
  • a measuring method of the adhesion amount of the zinc-based metal soap film for example, a fluorescent X-ray method is used. Specifically, a calibration curve is created using several types of standard samples with known amounts of zinc-based metal soap film deposited (in terms of Zn content) by the fluorescent X-ray method, and the Zn intensity of the sample to be measured is determined. In terms of the amount of zinc-based metal soap film, the amount of zinc-based metal soap film is determined.
  • the zinc-based metal soap film is preferably formed at least on the surface on the Al plating layer side of the plated steel sheet body on the surface that contacts the sliding surface of the hot press mold.
  • the zinc-based metal soap film is obtained when the plated steel sheet is hot press-molded with a hot pressing die. It is good to be formed at least on the surface of the plated steel sheet (Al plated layer or ZnO film of the plated steel sheet main body) to be the vertical wall part and the flange part of the press-formed product.
  • the surface of the plated steel sheet in the vertical wall and flange part of the press-formed product is a mold (for example, “a holder part and a shoulder part for holding a steel sheet” in the upper mold, and “a holder part for holding a steel sheet in the lower mold”) And the shoulder portion ”) (see FIG. 3 (8)), and therefore, the mold is likely to be worn.
  • the zinc-based metal soap film is preferably formed on the entire surface of the Al plating layer.
  • the plated steel sheet according to the present embodiment described above is used for hot press forming in a state having a zinc-based metal soap film, but hot press-forming in a state in which the zinc-based metal soap film is preheated to form a ZnO film.
  • the plated steel sheet according to the present embodiment is a plated steel sheet body having a steel sheet and an Al plated layer provided on one or both sides of the steel sheet, and ZnO provided on the surface of the plated steel sheet body on the Al plated layer side.
  • the film may be used for hot press forming.
  • the skewness Rsk of the roughness curve is measured according to JIS B 0601 (2001). Specifically, the skewness Rsk of the roughness curve is measured under the following measurement conditions according to IS B 0601 (2001).
  • the skewness Rsk of the roughness curve is defined in JIS B 0601 (2001), and is an index representing the symmetry of the peak and valley with respect to the average line of the roughness curve.
  • this Rsk is positive (0 ⁇ Rsk)
  • it indicates a state in which the peaks and valleys are unevenly distributed below the average line of the roughness curve.
  • this Rsk is negative (Rsk ⁇ 0)
  • it indicates a state in which peaks and valleys are unevenly distributed above the average line of the roughness curve. That is, when Rsk is negative (Rsk ⁇ 0), there are few peaks protruding on the surface, indicating a state of high smoothness.
  • the maximum value of Rsk on the surface of the ZnO film is preferably less than 0.
  • the manufacturing method of the plated steel plate which concerns on this embodiment has the process of forming a zinc type metal soap film
  • the method for manufacturing the plated steel sheet includes a step of forming a zinc-based metal soap film on the surface of the Al plating layer.
  • the method for producing the plated steel sheet includes a step of forming a zinc-based metal soap film on at least a part of the surface of the ZnO film.
  • the adhesion amount of the zinc-based metal soap film is 7 in terms of Zn amount. 0.1 to 19.8 g / m 2 , preferably 8.82 to 16.3 g / m 2 .
  • the total zinc system combined with the ZnO film adhesion amount of the plated steel sheet body
  • the adhesion amount of the metal soap film is 7.1 to 19.8 g / m 2 in terms of Zn amount, preferably 8.82 to 16 .3 g / m 2 .
  • more than half of the total adhesion amount of the ZnO film and the zinc oxide film is the adhesion amount of the zinc-based metal soap film. It is preferable to do.
  • the zinc-based metal soap film is formed by applying the zinc-based metal soap itself using a known coating device such as a spray coater, a roll coater, or a die coater.
  • a zinc-based metal soap film may be formed using a sponge, an electrostatic oiling device, or the like.
  • the viscosity of the zinc-based metal soap may be adjusted with an organic solvent.
  • a zinc-based metal soap film is formed as needed, for example by drying the coating film of zinc-based metal soap 300 degreeC or more for 2 minutes or more.
  • the type of zinc-based metal soap and the formation area of the zinc-based metal soap film are as described above.
  • the method for manufacturing a plated steel sheet according to the present embodiment may include a step of heating the zinc-based metal soap film at 300 ° C. or higher to obtain a ZnO film.
  • the zinc-based metal soap film is oxidized with zinc, and organic substances other than zinc (fatty acid, etc.) are decomposed to form a ZnO film (for example, a surface roughness curve skewness Rsk satisfying Rsk ⁇ 0). )
  • the obtained plated steel sheet may be used for hot press forming.
  • the method for manufacturing a hot press-formed product according to the present embodiment is a method for manufacturing a formed product by hot press-forming the plated steel sheet according to the present embodiment.
  • the method for manufacturing a hot press-formed product is a step of forming a zinc-based metal soap film in the method for manufacturing a plated steel sheet according to the present embodiment, and the surface on the Al plating layer side of the plated steel sheet body.
  • at least a zinc-based metal soap film is formed on the surface that contacts the sliding surface of the hot press mold, and then the manufactured hot press plated steel sheet is hot press formed.
  • the zinc-based metal soap film of the plated steel sheet becomes a ZnO film by heating before pressing, the plated steel sheet is pressed.
  • the zinc-based metal soap film is heated at 300 ° C. or higher, and the skewness Rsk of the surface roughness curve is 0 ⁇ You may hot press-mold the plated steel plate manufactured through the process of setting it as the ZnO membrane
  • the hot press-forming method for example, blanking (punching) is performed as necessary, and then heated to a high temperature to soften the plated steel sheet. And using the metal mold
  • subsequent plating can be easily performed by once softening the plated steel sheet.
  • the hot-pressed press-molded product is quenched by heating and cooling, and becomes a molded product having a high tensile strength of about 1500 MPa or more.
  • heating method for hot press forming it is possible to adopt a heating method by infrared heating, electric heating, induction heating, etc. in addition to a normal electric furnace and radiant tube furnace.
  • the Al plating layer of the plated steel sheet melts when heated to a temperature higher than the melting point, and at the same time, the Al phase changes into an Al—Fe alloy phase and an Al—Fe—Si alloy phase due to mutual diffusion with Fe.
  • the melting points of the Al—Fe alloy phase and the Al—Fe—Si alloy phase are high and are about 1150 ° C.
  • the preferable state of the Al plating layer as a press-formed product is a state in which the surface is alloyed and the Fe concentration in the alloy phase is not high. If Al which is not alloyed remains, only this portion is rapidly corroded, the corrosion resistance after coating is deteriorated, and the coating film bulges very easily, which is not preferable. On the other hand, if the Fe concentration in the alloy phase becomes too high, the corrosion resistance of the alloy phase itself decreases, the corrosion resistance after coating deteriorates, and the coating film tends to swell. That is, the corrosion resistance of the alloy phase depends on the Al concentration in the alloy phase. Therefore, in order to improve the corrosion resistance after painting, the alloying state is controlled by the amount of Al deposited and the heating conditions.
  • the average rate of temperature increase in the temperature range from 50 ° C. to 10 ° C. lower than the highest plate temperature to 10 to 300 ° C./second.
  • the average temperature increase rate affects the productivity in hot press forming of the plated steel sheet. If the average heating rate is less than 10 ° C./second, it takes time to soften the hot-pressed plated steel sheet. On the other hand, if it exceeds 300 ° C., softening is rapid, but alloying of the Al plating layer may cause powdering significantly.
  • a general average temperature increase rate is about 5 ° C./second in the case of atmospheric heating.
  • An average temperature increase rate of 100 ° C./second or more can be achieved by energization heating or high frequency induction heating.
  • the maximum temperature reached is usually about 900 to 950 ° C. because it is necessary to perform hot press molding in the austenite single phase region.
  • the maximum temperature reached is not particularly limited, but if it is less than 850 ° C., it is not preferable because sufficient quenching hardness cannot be obtained.
  • the Al plating layer needs to be an Al—Fe alloy phase. From these viewpoints, the maximum temperature reached is preferably 850 ° C. or higher.
  • the maximum temperature exceeds 1000 ° C. alloying proceeds too much, and the Fe concentration in the Al—Fe alloy phase increases, which may lead to a decrease in corrosion resistance after coating. From these viewpoints, the upper limit of the maximum attainable temperature depends on the rate of temperature rise and the amount of Al deposited. .
  • an example of the normal process from manufacture of a plated steel plate to hot press forming is as follows. First, an Al plating layer is formed on one side or both sides of a steel plate (FIG. 3 (1): 12 in FIG. 3 indicates a steel plate) (FIG. 3 (2): 14 in FIG. 3 indicates an Al plating layer). Next, a ZnO film is formed on the surface of the Al plating layer (FIG. 3 (3): 16 in FIG. 3 indicates the ZnO film). Next, the obtained plated steel sheet is wound up in a coil shape (FIG. 3 (4): 20 in FIG. 3 indicates a plated steel sheet (plated steel sheet body in this embodiment) wound in a coil shape).
  • FIG. 3 (7): 24 in FIG. 3 indicates a heating furnace.
  • the heated blank is breathed by a pair of upper and lower molds, and molded and quenched (FIG. 3 (8): 26A in FIG. 3 indicates the upper mold, and 26B indicates the lower mold).
  • the target press-molded product is obtained by removing from a metal mold
  • the zinc-based metal soap film is formed between the Al plating layer and after each process or between the processes until the plated steel sheet (blank material) is heated. Form with.
  • the zinc-based metal soap film is formed on the surface of the Al plating layer of the plated steel sheet body (blank after blanking, etc.) after the formation of the Al plating layer (in addition, the entire surface of the Al plating layer)
  • a zinc-based metal soap film is formed on the ZnO film
  • the formation of the ZnO film may be omitted.
  • the ZnO film of the plated steel sheet body bladenk after blanking, etc.
  • a zinc-based metal soap film is formed on the surface.
  • the formation location of the zinc-based metal soap film is preferably on the entire surface of the Al plating layer or ZnO film, but may be on the surface that contacts the sliding surface of the hot press mold.
  • the surface on which the plated steel plate comes into contact with the sliding surface of the hot pressing die is, for example, a plated steel plate (Al plating layer or ZnO film of the plated steel plate body) that becomes the vertical wall portion and flange portion of the obtained press-formed product.
  • the surface Specifically, for example, the surface on which the plated steel plate comes into contact with the sliding surface of the hot press die is the “holder and shoulder for holding the steel plate” in the upper die, and the “holder for holding the steel plate” in the lower die.
  • 26A1 in FIG. 3 is an upper mold holder
  • 26A2 is an upper mold shoulder
  • 26B1 is a lower mold.
  • the holder part 26B2 shows the lower shoulder part.
  • heating of the plated steel sheet before pressing may be performed while the zinc-based metal soap film is used, or after the zinc-based metal soap film is changed to a ZnO film.
  • ⁇ Vehicle manufacturing method In the hot press forming method according to the present embodiment, various press-formed products can be manufactured.
  • the surface on which the ZnO film is formed is particularly excellent in corrosion resistance (that is, coating corrosion resistance). For this reason, when a press-formed product for a vehicle is manufactured, it is preferable to manufacture the vehicle by attaching the manufactured press-formed product with the surface with the ZnO film facing the outside of the vehicle.
  • a press molded product for example, a center pillar outer, a door outer, a roof rail outer, a side panel, a fender, etc.
  • a press molded product for example, a center pillar outer, a door outer, a roof rail outer, a side panel, a fender, etc.
  • the press-molded product is attached to the vehicle so that the “surface on which the ZnO film is formed” faces the outside of the vehicle (for example, is exposed from the vehicle).
  • Examples 1 to 4 Cold-rolled steel sheets having the thicknesses shown in Table 1 (in mass%, C: 0.21%, Si: 0.12%, Mn: 1.21%, P: 0.02%, S: 0.012%, Ti: 0.02%, B: 0.03%, Al: 0.04%, balance: Fe and impurities) were plated with Al by the Sendzimer method.
  • the annealing temperature was about 800 ° C.
  • the Al plating bath contained 9% Si
  • the Al basis weight after plating was adjusted by a gas wiping method to obtain an Al basis weight per side shown in Table 1, and then cooled.
  • zinc bisoctanoate (“Zn-OCTOATE 22% non-solvent” manufactured by DIC) as a zinc-based metal soap is applied on the ZnO film with a roll coater to form a zinc-based metal soap film with the adhesion amount shown in Table 1. did. In this way, a specimen for a plated steel sheet was obtained.
  • Examples 5 to 8 Comparative Examples 7 to 8> Cold-rolled steel sheets having the thicknesses shown in Table 1 (in mass%, C: 0.21%, Si: 0.12%, Mn: 1.21%, P: 0.02%, S: 0.012%, Ti: 0.02%, B: 0.03%, Al: 0.04%, balance: Fe and impurities) were plated with Al by the Sendzimer method.
  • the annealing temperature was about 800 ° C.
  • the Al plating bath contained 9% Si
  • the Al basis weight after plating was adjusted by a gas wiping method to obtain an Al basis weight per side shown in Table 1, and then cooled.
  • zinc bisoctanoate (“Zn-OCTOATE 22% non-solvent” manufactured by DIC) was applied as a zinc-based metal soap on the formed Al plating layer with a roll coater, and the zinc-based metal soap film having the adhesion amount shown in Table 1 was applied. Formed. In this way, a specimen for a plated steel sheet was obtained.
  • the hot lubricity evaluation apparatus shown in FIG. 4 includes a near-infrared heating furnace 100 and a mold including an upper mold 102A and a lower mold 102B.
  • the upper mold 102A and the lower mold 102B have a convex part with a width of 10 mm extending in a direction orthogonal to the drawing direction of the plated steel sheet, and a predetermined test piece is sandwiched between the top surfaces of the convex parts. Apply a pressing load.
  • the hot lubricity evaluation apparatus is also provided with a plated steel sheet heated in the near-infrared heating furnace 100 and a thermocouple (not shown) for measuring the temperature of the plated steel sheet when sandwiched between molds. Yes.
  • 10 shows the test material of a plated steel plate.
  • Mold wear amount was measured by analyzing the surface shape difference of (1) “die of hot lubricity measuring device” before and after the hot lubricity evaluation test. Specifically, the amount of wear of the mold was measured by measuring the profile of the mold surface at the sliding part before and after sliding using a contact-type shape measuring machine. The die wear amount was an average value of the upper die wear amount and the lower die wear amount.
  • Adhesion amount of ZnO film of test material (1) Adhesion amount (Zn amount conversion) of ZnO film on the surface of the test material after the evaluation test of hot lubricity was measured by the method described above.
  • Table 1 shows a list of details of Examples 1 to 8 and Comparative Examples 1 to 8.
  • the total amount in terms of Zn content of the surface deposit indicates “adhesion amount of ZnO film and zinc-based metal soap film (Zn amount conversion)”.
  • Examples 1 to 8 by forming an appropriate amount of the zinc-based metal soap film, a highly smooth ZnO film was formed from the zinc-based metal soap film. It was confirmed that the wear of the sliding surface can be reduced. In Examples 1 to 8, it was confirmed that after the hot lubricity evaluation test, the ZnO film was not peeled off on the surface of the test material, and the chemical conversion treatment property and corrosion resistance of the obtained molded product could be improved. . In Examples 2, 3, 6, and 7, the total adhesion amount of the zinc-based metal soap film together with the adhesion amount of the ZnO film is larger than 8.8 g / m 2 in terms of Zn amount (including 8.8). In the case of 16.3 g / m 2 or less, die wear is suppressed and the hot friction coefficient is 0.4 or less. As a result, it was confirmed that the moldability of the material in hot press molding (hot press) can be improved.
  • hot press hot press
  • Examples 9 to 16, Comparative Example 9, Reference Example 1 The object (time) and conditions (formation method, adhesion amount, zinc-based metal soap film) for forming the zinc-based metal soap film from the production of the plated steel sheet to hot press forming (hot press) (see Fig. 3) The presence or absence of the heating step for forming the ZnO film and the formation site) were changed as shown in Table 2 to produce press-formed products (dish-shaped products). However, when the object for forming the zinc-based metal soap film was the surface of the Al plating layer, the ZnO film was not formed. In hot press forming (hot press), the plated steel sheet was heated to 900 ° C. and then pressed under the conditions of 700 ° C.
  • Example 1 the kind of steel plate, the conditions for forming the Al plating layer, the condition for forming the ZnO film, and the kind of zinc-based metal soap were the same as those in Example 1.
  • Example 9 The details of Examples 9 to 16, Comparative Example 9, and Reference Example 1 are listed below in Table 2.
  • Table 2 the column for the amount of zinc-based aliphatic metal soap film attached (in terms of Zn content) is “Zinc-based” in Example 9 where a zinc-based aliphatic metal soap film is formed on the surface of the Al plating layer.
  • Examples 10 to 16 in which the adhesion amount (in terms of Zn amount) of the aliphatic metal soap film itself is shown and the zinc-based aliphatic metal soap film is formed on the surface of the ZnO film, “ZnO film and zinc-based aliphatic metal soap” The total adhesion amount (in terms of Zn amount) of the film is shown.
  • a zinc-based metal soap film is formed on the surface of the Al plating layer or the ZnO film between the production of the plated steel sheet and before the press of hot press forming (hot press). It has been confirmed that the formation of can improve the hot lubricity and reduce the wear on the sliding surface of the mold. As shown in Examples 9 to 10, it has been confirmed that even when a zinc-based metal soap film is heated to a ZnO film, the hot lubricity can be improved and the wear of the sliding surface of the mold can be reduced. did.
  • At least a zinc-based metal soap film is formed on the surface of the plated steel sheet (the Al plated layer or ZnO film of the plated steel sheet body) that becomes the vertical wall portion and the flange portion of the molded product. It was confirmed that the wear on the sliding surface of the mold can be reduced. In Examples 9 to 16, no peeling of the ZnO film on the surface of the molded product was observed, and it was confirmed that the chemical conversion treatment property and corrosion resistance of the obtained molded product could be improved.

Abstract

L'invention concerne une tôle d'acier plaquée pour formage à chaud à la presse, et son procédé de fabrication, la tôle d'acier plaquée pour formage à chaud à la presse ayant : un corps de tôle d'acier plaquée comprenant une tôle d'acier et une couche de placage d'aluminium disposée sur une ou sur les deux surfaces de la tôle d'acier ; un revêtement de savon métallique à base de zinc dont la quantité déposée est de 7,1 à 19,8 g/m2 en termes de Zn, le revêtement de savon métallique à base de zinc étant disposé sur la surface du côté de la couche de placage d'aluminium du corps de tôle d'acier plaquée (dans le corps de tôle d'acier plaquée, lorsqu'il y a un revêtement d'oxyde de zinc sur la surface de la couche de placage d'aluminium, la quantité totale déposée du revêtement d'oxyde de zinc et du revêtement de savon métallique à base de zinc est de 7,1 à 19,8 g/m2 en termes de Zn). L'invention concerne également un procédé de fabrication d'un article formé à chaud à la presse utilisant la tôle d'acier plaquée pour formage à chaud à la presse, et un procédé de fabrication d'un véhicule qui utilise un article formé à la presse fabriqué au moyen du procédé de fabrication d'un article formé à chaud à la presse.
PCT/JP2017/046035 2016-12-28 2017-12-21 Tôle d'acier plaquée pour formage à chaud à la presse, son procédé de fabrication, procédé de fabrication d'un article formé à chaud à la presse et procédé de fabrication de véhicule WO2018123831A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
KR1020197018677A KR102037085B1 (ko) 2016-12-28 2017-12-21 열간 프레스용 도금 강판, 열간 프레스용 도금 강판의 제조 방법, 열간 프레스 성형품의 제조 방법, 및 차량의 제조 방법
RU2019123276A RU2710396C1 (ru) 2016-12-28 2017-12-21 Плакированный стальной лист для горячей штамповки, способ изготовления плакированного стального листа для горячей штамповки, способ изготовления горячештампованного компонента и способ изготовления транспортного средства
EP17886827.9A EP3564409A4 (fr) 2016-12-28 2017-12-21 Tôle d'acier plaquée pour formage à chaud à la presse, son procédé de fabrication, procédé de fabrication d'un article formé à chaud à la presse et procédé de fabrication de véhicule
JP2018518669A JP6369659B1 (ja) 2016-12-28 2017-12-21 熱間プレス用めっき鋼板、熱間プレス用めっき鋼板の製造方法、熱間プレス成形品の製造方法、及び車両の製造方法
CA3048362A CA3048362C (fr) 2016-12-28 2017-12-21 Tole d'acier plaquee pour formage a chaud a la presse, son procede de fabrication, procede de fabrication d'un article forme a chaud a la presse et procede de fabrication de vehicule
CN201780080183.4A CN110114510B (zh) 2016-12-28 2017-12-21 热压用镀覆钢板、热压用镀覆钢板的制造方法、热压成形品的制造方法及车辆的制造方法
MX2019007700A MX2019007700A (es) 2016-12-28 2017-12-21 Lámina de acero enchapada para estampación en caliente, método de fabricación de lámina de acero enchapada para estampación en caliente, método de fabricación de componente estampado en caliente, y método de fabricación de vehículo.
BR112019013257A BR112019013257A2 (pt) 2016-12-28 2017-12-21 chapa de aço galvanizada para estampagem a quente, método de fabricação de chapa de aço galvanizada para estampagem a quente, método de fabricação de componente estampado a quente e método de fabricação de veículo
US16/474,512 US20200024748A1 (en) 2016-12-28 2017-12-21 Plated steel sheet for hot stamping, method of manufacturing plated steel sheet for hot stamping, method of manufacturing hot-stamped component, and method of manufacturing vehicle

Applications Claiming Priority (2)

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JP2016256016 2016-12-28
JP2016-256016 2016-12-28

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WO2018123831A1 true WO2018123831A1 (fr) 2018-07-05

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US (1) US20200024748A1 (fr)
EP (1) EP3564409A4 (fr)
JP (1) JP6369659B1 (fr)
KR (1) KR102037085B1 (fr)
CN (1) CN110114510B (fr)
BR (1) BR112019013257A2 (fr)
CA (1) CA3048362C (fr)
MX (1) MX2019007700A (fr)
RU (1) RU2710396C1 (fr)
WO (1) WO2018123831A1 (fr)

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JPWO2018123831A1 (ja) 2018-12-27
RU2710396C1 (ru) 2019-12-26
EP3564409A1 (fr) 2019-11-06
EP3564409A4 (fr) 2020-01-01
US20200024748A1 (en) 2020-01-23
JP6369659B1 (ja) 2018-08-08
CN110114510B (zh) 2020-06-09
MX2019007700A (es) 2019-09-13
CA3048362C (fr) 2020-05-05
KR20190085137A (ko) 2019-07-17
KR102037085B1 (ko) 2019-10-30
BR112019013257A2 (pt) 2019-12-24
CN110114510A (zh) 2019-08-09

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