CN113677820B - 镀层钢材 - Google Patents
镀层钢材 Download PDFInfo
- Publication number
- CN113677820B CN113677820B CN202080026385.2A CN202080026385A CN113677820B CN 113677820 B CN113677820 B CN 113677820B CN 202080026385 A CN202080026385 A CN 202080026385A CN 113677820 B CN113677820 B CN 113677820B
- Authority
- CN
- China
- Prior art keywords
- phase
- plating layer
- less
- area fraction
- coated steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
-
- 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
-
- 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
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
-
- 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
- C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
-
- 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
- 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
-
- 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
-
- 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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- 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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
- C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12736—Al-base component
- Y10T428/1275—Next to Group VIII or IB metal-base component
- Y10T428/12757—Fe
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12951—Fe-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12951—Fe-base component
- Y10T428/12958—Next to Fe-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12951—Fe-base component
- Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12951—Fe-base component
- Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
- Y10T428/12979—Containing more than 10% nonferrous elements [e.g., high alloy, stainless]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
一种镀层钢材,具备钢材和设置于所述钢材的表面的镀层,所述镀层以质量%计含有Al:5.00~35.00%、Mg:2.50~13.00%、Fe:5.00~40.00%、Si:0~2.00%、和Ca:0~2.00%,余量包含Zn及杂质,在所述镀层的截面中,固溶了5%以上的Zn的Zn固溶Fe2Al5相的面积分率为10~60%,MgZn2相的面积分率为10~90%。
Description
技术领域
本发明涉及镀层钢材。
本申请基于在2019年04月19日向日本提出的专利申请2019-080289号要求优先权,在此援引其内容。
背景技术
近年来,以建材领域为中心开展了Zn-Al-Mg热浸镀层钢板的开发。
在专利文献1中公开了一种Al-Zn系热浸镀层钢板,其特征在于,具有下述镀层,所述镀层以质量%计含有Al:25~90%和Sn:0.01~10%,而且,含有合计为0.01~10%的选自Mg、Ca和Sr中的一种以上。
在专利文献2中公开了一种化学转化处理钢板,其特征在于,将Al/Zn/Zn2Mg三元共晶组织在镀层最表面所占的比例为60面积%以上的Zn-Al-Mg合金热浸镀层钢板作为基材,使用析出层、磷酸盐皮膜、化学转化皮膜覆盖镀层表面,所述析出层是包含选自Ni、Co、Fe、Mn中的至少一种,Ni、Co、Fe的合计附着量为0.05~5.0mg/m2的范围,Mn的附着量为0.05~30mg/m2的范围的层,所述磷酸盐皮膜由平均粒径为0.5~5.0μm的磷酸盐晶体构成,所述化学转化皮膜是阀金属的氧化物或氢氧化物与阀金属的氟化物共存的皮膜,磷酸盐晶体的基部深入到镀层中而从镀层立起,化学转化皮膜是在与在磷酸盐晶体之间露出的镀层或析出层的界面隔有生成的界面反应层的有机树脂皮膜。
在专利文献3中公开了一种锌系合金镀层钢材,其特征在于,在钢材的表面具有锌系合金镀层,所述锌系合金镀层以质量%计含有Mg:1~10%、Al:2~19%、Si:0.01~2%、和Fe:2~75%,余量由Zn和不可避免的杂质构成。
但是,在专利文献1~3中,关于镀层钢板的牺牲防蚀性、特别是在镀层钢板上形成有化学转化处理被膜、电沉积涂膜(以下有时总称为涂膜),且在涂膜下腐蚀进展了的情况下的镀层钢板的牺牲防蚀性的研究不能说是充分的。
从以上的背景来看,希望开发牺牲防蚀性(涂膜形成后的牺牲防蚀性)优异的镀层钢板。
在先技术文献
专利文献
专利文献1:日本国特开2015-214747号公报
专利文献2:日本国专利第4579715号公报
专利文献3:日本国特开2009-120947号公报
发明内容
本发明是鉴于上述情况而完成的,其课题是提供牺牲防蚀性优异的镀层钢材。
为了解决上述课题,本发明采用以下方案。
(1)本发明的一方式涉及的镀层钢材,具备钢材和设置于所述钢材的表面的镀层,所述镀层以质量%计含有Al:5.00~35.00%、Mg:2.50~13.00%、Fe:5.00~40.00%、Si:0~2.00%、和Ca:0~2.00%,余量包含Zn及杂质,在所述镀层的截面中,固溶了5%以上的Zn的Zn固溶Fe2Al5相的面积分率为10~60%,MgZn2相的面积分率为10~90%。
(2)根据(1)所述的的镀层钢材,所述镀层以质量%计可以含有Al:10.00~30.00%。
(3)根据(1)或(2)所述的镀层钢材,所述镀层以质量%计可以含有Mg:4.00~11.00%。
(4)根据(1)~(3)的任一项所述的镀层钢材,所述镀层以质量%计可以含有Ca:0.03~1.00%。
(5)根据(1)~(4)的任一项所述的镀层钢材,在所述镀层的所述截面中,所述Zn固溶Fe2Al5相的面积分率可以为20~60%。
(6)根据(1)~(5)的任一项所述的镀层钢材,在所述镀层的所述截面中,Zn的固溶量小于5%的Zn非固溶Fe2Al5相的面积分率可以为10%以下。
(7)根据(1)~(6)的任一项所述的镀层钢材,在所述镀层的所述截面中,主要由Al相和Zn相构成的Al-Zn枝晶的面积分率可以为5%以下。
(8)根据(1)~(7)的任一项所述的镀层钢材,在所述镀层的所述截面中,Zn/Al/MgZn2三元共晶组织的面积分率可以为5%以下。
(9)根据(1)~(8)的任一项所述的镀层钢板,在所述镀层的所述截面中,FeAl相的面积分率可以为10%以下。
(10)根据(1)~(9)的任一项所述的镀层钢材,在所述镀层的所述截面中,块状Zn相的面积分率可以为10%以下。
(11)根据(1)~(10)的任一项所述的镀层钢材,在所述镀层的所述截面中,Mg2Si相的面积分率可以为10%以下。
根据本发明的上述方式,能够提供牺牲防蚀性优异的镀层钢材。
附图说明
图1是表示本实施方式涉及的镀层钢材的截面组织的SEM图像。
图2是表示现有技术涉及的镀层钢板的截面组织的SEM图像。
具体实施方式
以下,对本发明的一实施方式涉及的镀层钢材(本实施方式涉及的镀层钢材)及其优选的制造方法进行说明。
[镀层钢材]
本实施方式涉及的镀层钢材,具备钢材和设置于所述钢材的表面的镀层,
所述镀层以质量%计含有
Al:5.00~35.00%、
Mg:2.50~13.00%、
Fe:5.00~40.00%、
Si:0~2.00%、和
Ca:0~2.00%,
余量包含Zn及杂质,
在所述镀层的截面中,固溶了5%以上的Zn的Zn固溶Fe2Al5相的面积分率为10~60%,MgZn2相的面积分率为10~90%。
<钢材>
成为镀层钢材的基底的钢材的材质没有特别限定。能够使用普通钢、预镀Ni钢、Al镇静钢、一部分高合金钢。另外,钢材的形状也没有特别限定。例如钢材为热轧钢板、冷轧钢板等钢板。以下,在本实施方式中,对钢材为钢板(本实施方式涉及的镀层钢板)的情况进行说明。
<镀层>
本实施方式涉及的镀层钢材在钢材的表面具备镀层。
(化学成分)
接着,对镀层含有的化学成分(化学组成)进行说明。在以下的化学成分的说明中,只要没有特别的说明,则“%”表示“质量%”。
Al:5.00~35.00%
Al是为了使镀层中含有Zn以外的其他元素而需要的元素。本来,在Zn镀层(Zn层)中难以含有其他元素,例如难以高浓度地含有Mg。但是,通过在镀层(Zn系镀层)中含有Al,能够制造含有Mg的镀层。
当Al浓度(Al含量)小于5.00%时,除了Mg以外,有难以含有对镀层赋予性能的合金元素的倾向。另外,由于Al的密度低,所以与Zn相比,相对于质量基准的含量,形成许多的相量的Al相。但是,当Al浓度小于5.00%时,有镀层的大半成为Zn相的倾向。由此,也导致牺牲防蚀性显著降低。从牺牲防蚀性的观点出发,不优选在镀层中Zn相成为第1相。
另外,当Al浓度小于5.00%时,在镀层中缺乏塑性变形能力的MgZn2相成为初晶而容易粗大地生长,有镀层的加工性显著变差的倾向。
因此,Al浓度设为5.00%以上。优选为10.00%以上。
另一方面,当Al浓度增加时,在镀层中Al相的比例急速地增加,赋予牺牲防蚀性所需要的Zn固溶Fe2Al5相、MgZn2相的比例减少,因此不优选。因此,将Al浓度设为35.00%以下。优选为30.00%以下。
Mg:2.50%~13.00%
Mg是为了赋予牺牲防蚀性所需要的元素。当在Zn系镀层中添加Mg时,Mg形成作为金属间化合物的MgZn2。为了使镀层的牺牲防蚀性充分地提高,最低限度所需要的Mg浓度为2.50%。因此,将Mg浓度设为2.50%以上。优选为3.00%以上。另外,从耐红锈性的观点出发,优选将Mg浓度设为4.00%以上。
另一方面,当Mg浓度超过13.00%时,MgZn2相急速地增加相量,镀层的塑性变形能力丧失,加工性劣化,因此不优选。因此,Mg浓度设为13.00%以下。优选为11.00%以下。
Fe:5.00~40.00%
当Fe浓度小于5.00%时,Fe量不充分,形成的Fe2Al5相变少,因此不优选。另外,当Fe浓度小于5.00%时,存在无助于牺牲防蚀性的提高的Al-Zn枝晶的面积分率超过5%的情况,因此不优选。因此,将Fe浓度设为5.00%以上。优选设为10.00%以上,更优选设为15.00%以上。
当Fe浓度超过40.00%时,在本实施方式涉及的镀层中未形成所希望的金属组织的可能性高,引起与Fe成分的增加相伴的电位的上升,有不能够针对钢材维持适当的牺牲防蚀性、诱发腐蚀速度的增加的可能性,因此不优选。因此,将Fe浓度设为40.00%以下。优选设为30.00%以下,更优选设为25.00%以下。
另外,Fe浓度,相对于Al浓度优选使Fe/Al为0.9~1.2。通过将Fe/Al设为上述范围,变得容易形成Fe2Al5相。
当Fe/Al小于0.9时,难以生成充分量的Fe2Al5,存在过量地生成主要由Al相和Zn相构成的枝晶的情况。另外,当Fe/Al超过1.2时,容易形成Fe-Zn系金属间化合物相,在该情况下也难以形成Fe2Al5相。
Si:0~2.00%
Si是对提高钢材与镀层的密合性有效的元素。因此,也可以使镀层含有Si。由于也可以使镀层不含Si,因此Si浓度的下限值为0%。由Si带来的密合性提高效果,在镀层中的Si浓度为0.03%以上时显现,因此在使镀层含有Si的情况下,优选将Si浓度设为0.03%以上。
另一方面,即使镀层中的Si浓度超过2.00%,由Si带来的密合性提高效果也饱和。因此,即使是使镀层中含有Si的情况,Si浓度也设为2.00%以下。Si浓度优选为1.00%以下。
Ca:0~2.00%
Ca是对提高镀层钢板的化学转化处理性有效的元素。因此,也可以出于提高镀层钢板的化学转化处理性的目的而使镀层含有Ca。Ca的牺牲防蚀性提高效果缺乏,因此也可以使镀层不含有Ca。因此,Ca浓度的下限值是0%。由Ca带来的牺牲防蚀性提高效果在镀层中的Ca浓度为0.03%以上时显现,因此优选将Ca浓度设为0.03%以上。更优选为0.05%以上。
另一方面,即使镀层中的Ca浓度超过2.00%,由Ca带来的牺牲防蚀性提高效果也饱和。因此,即使是使镀层中含有Ca的情况,Ca浓度也设为2.00%以下。Ca浓度优选为1.00%以下。
余量:Zn及杂质
将Al、Mg、Fe、Si、Ca除外后的余量为Zn及杂质。在此,杂质意指在镀覆的过程中不可避免地混入的元素,这些杂质可以包含合计3.00%左右。也就是说,可以将镀层中的杂质的含量设为3.00以下。
作为杂质而可能含有的元素和这些元素的浓度,例如可列举Sb:0~0.50%、Pb:0~0.50%、Cu:0~1.00%、Sn:0~1.00%、Ti:0~1.00%、Sr:0~0.50%、Ni:0~1.00%、以及Mn:0~1.00%等。当在镀层中超过这些浓度地含有杂质元素时,存在阻碍获得所希望的特性的可能性,因此不优选。
镀层的化学成分利用以下的方法来测定。
首先,获得使用含有抑制钢基体(钢材)的腐蚀的抑制剂(缓蚀剂)的酸将镀层剥离溶解而得到的酸液。接着,通过采用ICP分析来测定所得到的酸液,能够得到镀层的化学组成。酸种类只要是能够溶解镀层的酸,就没有特别限制。化学组成作为平均化学组成来测定。
(组织)
本实施方式涉及的镀层钢板的镀层,在其截面(厚度方向截面)中,固溶有5%以上的Zn的Zn固溶Fe2Al5相的面积分率为10~60%,MgZn2相的面积分率为10~90%。
图1是表示本实施方式涉及的镀层钢板20的组织的SEM图像。如图1所示,在本实施方式涉及的镀层钢板20中,通过使用SEM的截面观察,观察到:在钢材5的表面形成有镀层10,在镀层10内存在固溶有5%以上的Zn的Fe2Al5相11、和MgZn2相12。
图2是表示现有技术涉及的镀层钢板100的组织的SEM图像。图2所示的现有技术涉及的镀层钢板100,是现有技术涉及的Zn-Al-Mg系热浸镀层钢板,通过对钢材5进行Zn-Al-Mg系热浸镀,从而在钢材5的表面形成有Zn-Al-Mg系热浸镀层130。
如图2所示,在现有技术涉及的镀层钢板100的Zn-Al-Mg系热浸镀层130中,由于未进行合金化处理,因此Zn/Al/MgZn2三元共晶组织131、Al-Zn枝晶133占据大部分,未观察到Fe2Al5相、MgZn2相。
以下,对本实施方式涉及的镀层钢板的镀层的组织进行说明。
固溶有5%以上的Zn的Fe2Al5相(以下有时称为Zn固溶Fe2Al5相)的面积分率:10~60%
在本实施方式涉及的镀层钢板中,通过如后述那样在热浸镀工序后进行合金化工序,从而在镀层中形成有Fe2Al5相,在该Fe2Al5相中固溶有5%以上的Zn。
通过本实施方式涉及的镀层钢板的镀层具有10%以上的Zn固溶Fe2Al5相,能够得到很好的牺牲防蚀性。因此,将镀层中的Zn固溶Fe2Al5相的面积分率设为10%以上。优选为20%以上。
另一方面,在镀层中的Zn固溶Fe2Al5相的面积分率超过60%的情况下,提高牺牲防蚀性的效果饱和,因此不优选。因此,将Zn固溶Fe2Al5相的面积分率设为60%以下,优选设为50%以下。
Zn固溶Fe2Al5相,不仅对于牺牲防蚀性是重要的组织,而且为了很好地防止点焊时的液态金属脆化开裂(LME)(获得优异的耐LME性)也是重要的组织。
通过在Fe2Al5相中固溶有5%以上的Zn,具有Fe2Al5相的牺牲防蚀性大幅度提高这样的效果。由于Zn的固溶量小于5%的Fe2Al5相(以下有时称为Zn非固溶Fe2Al5相)不具有充分的牺牲防蚀性,因此优选Zn非固溶Fe2Al5相的面积分率少,优选为10%以下。
MgZn2相的面积分率:10~90%
为了获得很好的牺牲防蚀性,将MgZn2相的面积分率设为10%以上。优选为20%以上。
另一方面,当MgZn2相的面积分率超过90%时,Zn固溶Fe2Al5相的面积分率过低,难以获得好的牺牲防蚀性。因此,将MgZn2相的面积分率设为90%以下。优选为80%以下。
剩余部分的面积分率:20%以下
为了获得很好的牺牲防蚀性,将Zn固溶Fe2Al5相和MgZn2相以外的剩余部分的组织的面积分率设为20%以下。优选设为15%以下,更优选设为10%以下。
作为剩余部分中所含的组织,可列举上述的Zn非固溶Fe2Al5相、后述的Al-Zn枝晶、Zn/Al/MgZn2三元共晶组织、FeAl相、块状Zn相、Mg2Si相等。以下,对剩余部分中所含的这些组织分别进行说明。关于Zn非固溶Fe2Al5相,在前面已叙述,因此省略在这里的说明。
主要由Al相和Zn相构成的枝晶(Al-Zn枝晶)的面积分率:5%以下
在形成镀层时,在后述的热浸镀工序后从浴温冷却的过程中,首先Al初晶(作为初晶而结晶出的α-(Zn,Al)相)结晶出,呈枝晶状地生长(以下称为Al-Zn枝晶)。然后,通过加热至440℃~480℃的温度范围来进行合金化处理,大部分的Al-Zn枝晶被置换为别的组织,但一部分在合金化处理后也残留。
Al-Zn枝晶未对牺牲防蚀性、耐LME性给予好的影响,因此优选其面积分率更低。因此,在本实施方式涉及的镀层钢板的镀层中,优选将Al-Zn枝晶的面积分率设为5%以下。更优选设为3%以下。
“主要”是指枝晶之中含有约91%以上的Al相和Zn相,作为除了Al相和Zn相以外的剩余部分,可含有5%以下的Fe、3%以下的Mg、1%以下的钢成分元素(Ni、Mn)。
Zn/Al/MgZn2三元共晶组织的面积分率:5%以下
Zn/Al/MgZn2三元共晶组织是通过Zn-Al-Mg系共晶反应而在Al初晶部的外部最终凝固的Zn相、Al相、MgZn2相所构成的Zn层、Al层、MgZn2层的层状组织。Zn/Al/MgZn2三元共晶组织也具有提高牺牲防蚀性的效果,但与Fe2Al5相、MgZn2相比较,其提高效果差。因此,优选Zn/Al/MgZn2三元共晶组织的面积分率更低。因此,在本实施方式涉及的镀层中,优选将Zn/Al/MgZn2三元共晶组织的面积分率设为5%以下。更优选设为3%以下。
FeAl相:10%以下
FeAl相缺乏牺牲防蚀性,因此优选尽量少。因此,优选将FeAl相的面积分率设为10%以下。更优选设为5%以下。
块状Zn相:10%以下
块状Zn相是在镀层中的Mg含量低的情况下有时形成的组织。当形成块状Zn相时,存在涂膜鼓胀宽度变大的倾向,因此优选其面积分率低,优选10%以下。块状Zn相是与Zn/Al/MgZn2三元共晶组织中所含的Zn相分别开的相。块状Zn相具有枝晶形状,在截面组织中也有时作为圆形被观察到。
Mg2Si相和其他的金属间化合物相:分别为10%以下
Mg2Si相是在Si添加量过量的情况下所形成的相,促进周围的腐蚀,结果有时使耐红锈性降低。为了确保充分的耐红锈性,其面积分率需要限制在10%以下。
另外,由于其他的金属间化合物相也不对化学转化处理性给予好的影响,因此面积分率优选为10%以下,更优选为5%以下。作为其他的金属间化合物相,例如可列举CaZn11相、Al2CaSi2相、Al2CaZn2相等。
在本实施方式中,只要没有特别说明,“面积分率”是指:对于随机地选择的5个以上的不同的样品,算出镀层截面中的所希望的组织的面积分率的情况下的它们的算术平均值。该面积分率实质上表示镀层中的体积分率。
<面积分率的测定方法>
镀层中的各组织的面积分率通过以下的方法求出。
首先,将成为测定对象的镀层钢板切割成25(C)×15(L)mm,埋入到树脂中,进行研磨。然后,获得镀层的截面SEM像和基于EDS的元素分布像。镀层的构成组织、即Zn固溶Fe2Al5相、MgZn2相、Zn非固溶Fe2Al5相、(Al-Zn)枝晶、Zn/Al/MgZn2三元共晶组织、FeAl相、块状Zn相、Mg2Si相、其他的金属间化合物相的面积分率,从不同的5个样品以各1个视场、合计5个视场(倍率1500倍:60μm×45μm/1视场)拍摄镀层的截面EDS映射像,通过图像解析来测定各组织的面积分率。
Fe2Al5相中的Zn的固溶量,能够通过使用SEM-EDS、EPMA测定构成Fe2Al5相的成分元素浓度从而测定出。
<特性>
本实施方式涉及的镀层钢板,通过具备具有上述特征的钢材和镀层,从而具有优异的牺牲防蚀性。
另外,本实施方式涉及的镀层钢板,通过具备具有上述特征的钢材和镀层,从而具有优异的耐LME性。
[镀层钢板的制造方法]
接着,对本实施方式涉及的镀层钢板的制造方法进行说明。以下,对钢材为钢板的情况进行说明。
本实施方式涉及的镀层钢板的制造方法,具有:热浸镀工序,使母材钢板浸渍在至少含有Al、Mg、Zn的镀浴中,来实施热浸镀;合金化工序,将实施了所述热浸镀的所述母材钢板在480℃~580℃加热1~15秒;以及,冷却工序,以15℃/秒以上的平均冷却速度将实施了镀覆的所述钢材冷却到室温。
<热浸镀工序>
在热浸镀工序中,使母材钢板浸渍在至少含有Al、Mg、Zn的镀浴中,来实施热浸镀。
在热浸镀工序中,通过所谓的热浸镀法来形成,即:使镀浴附着于母材钢板表面,接着,从镀浴提起母材钢板,使附着于母材钢板表面的熔融金属凝固。
(镀浴)
镀浴的组成,只要至少包含Al、Mg、Zn即可,只要使用以成为上述的镀层的组成的方式将原料配合并熔化而成的镀浴即可。
镀浴的温度,优选为超过380℃且为600℃以下的范围,可以是400~600℃的范围。
优选通过在浸渍于镀浴之前将母材钢板在还原性气氛中加热,从而对母材钢板表面进行还原处理。例如,在氮气与氢气的混合气氛中,在600℃以上、优选750℃以上的温度热处理30秒以上。还原处理结束了的母材钢板冷却到镀浴的温度后,浸渍在镀浴中。浸渍时间可以是例如1秒以上。在提起浸渍在镀浴中的母材钢板时,通过气体擦拭来调整镀层的附着量。附着量优选为10~300g/m2的范围,可以是20~250g/m2的范围。
<合金化工序>
本实施方式涉及的镀层钢板的制造方法,具有将实施了热浸镀的母材钢板在480℃~580℃的温度加热1~15秒的合金化工序。
在合金化工序中,当加热温度(以下称为合金化温度)小于480℃时,合金化进行得慢,并且,在镀层未形成所希望的组织,因此不优选。因此,将合金化温度设为480℃以上。
另一方面,当合金化温度超过580℃时,由于在短时间内合金化过度地进行,因此不能很好地控制合金化工序,因此不优选。另外,当合金化温度超过580℃时,Fe与Zn形成使耐红锈性降低的Fe-Zn系金属间化合物,因此不优选。另外,形成Fe-Zn系金属间化合物,由此在与牺牲防蚀性有关系的Fe-Al相中固溶的Zn减少,不能形成充分的面积分率的Zn固溶Fe2Al5相,因此不优选。因此,将合金化温度设为580℃以下。
当合金化工序中的加热时间(以下称为合金化时间)小于1秒时,在将实施了热浸镀的母材钢板加热到480℃~580℃的温度范围时,合金化的进展不足,因此不优选。因此,将合金化时间设为1秒以上。
另一方面,当合金化时间超过15秒时,合金化进展得太显著,因此不优选。因此,将合金化时间设为15秒以下。
在合金化工序中,加热方法没有特别限定,例如可列举感应加热等加热方法。
<冷却工序>
本实施方式涉及的镀层钢板的制造方法,优选在从镀浴提起镀层钢板后实施合金化热处理的工序之后,具有以15℃/秒以上的平均冷却速度冷却到100℃以下(例如室温附近)的工序。
根据以上所述,能够制造本实施方式涉及的镀层钢板。
本实施方式涉及的镀层钢板具有优异的牺牲防蚀性。另外,本实施方式涉及的镀层钢板具有优异的耐LME性。
实施例
实施例1
<母材钢板>
作为实施镀覆的母材钢板,使用了板厚1.6mm的冷轧钢板(0.2%C-1.5%Si-2.6%Mn)。
<热浸镀工序>
将母材钢板切割为100mm×200mm后,使用分批式的热浸镀试验装置实施了镀覆。板温使用点焊于母材钢板中心部的热电偶来进行测定。
在镀浴浸渍前,在氧浓度为20ppm以下的炉内、在N2-5%H2气体且露点为0℃的气氛中、在860℃将母材钢板表面进行了加热还原处理。然后,在N2气体中空冷,浸渍板温度到达浴温+20℃后,在表1A、表1B中所示的浴温的镀浴中浸渍约3秒钟。
在镀浴浸渍后,以提起速度100~500mm/秒提起。在提起时,使用N2擦拭气体来控制镀层附着量。
<合金化工序>
在使用擦拭气体来控制了镀层附着量后,采用表1A、表1B中所示的合金化温度和合金化时间的条件来对镀层钢板实施了合金化工序。在合金化工序中,使用了感应加热装置。
<冷却工序>
通过将在表1A、表1B所示的条件下实施合金化工序后的镀层钢板冷却,来将镀层钢板从合金化温度冷却到室温。
使用上述的方法调查了镀层的组成。结果示于表1A、表1B。
<组织观察>
为了调查镀层的组织构成,将制作的样品切割为25(C)mm×15(L)mm,埋入到树脂中,进行研磨后,获得镀层的截面SEM像和基于EDS的元素分布像。镀层的构成组织、即Zn固溶Fe2Al5相、MgZn2相、Zn非固溶Fe2Al5相、(Al-Zn)枝晶、Zn/Al/MgZn2三元共晶组织、FeAl相、块状Zn相、Mg2Si相、其他的金属间化合物相的面积分率,从不同的5个样品以各1个视场、合计5个视场(倍率1500倍)拍摄镀层的截面EDS映射像,通过图像解析来算出。
在表2A、表2B中记载了各实施例和比较例中的各组织的面积分率。
<牺牲防蚀性(钢基体防蚀性)>
针对各实施例和比较例,使用以下的方法评价了牺牲防蚀性(钢基体防蚀性)。
将使用上述方法制造的各实施例和比较例涉及的镀层钢板切成50mm×100mm的大小,实施了磷酸Zn处理(SD5350系:日本ペイント·インダストリアルコーディング公司制规格)。进而,在烘烤温度为150℃、烘烤时间为20分钟的条件下,在磷酸Zn皮膜上实施了膜厚20μm的电沉积涂装(PN110パワーニックス(注册商标)グレー:日本ペイント·インダストリアルコーディング公司制规格)。
接着,以到达制造出的涂装镀层钢板的钢基体的方式制作了交叉切割伤(40×√22条)。将制作了交叉切割伤的涂装镀层钢板供于基于JASO(M609-91)的复合循环腐蚀试验。通过使用千分尺(测微计:micrometer)测定试验后的钢基体的侵蚀深度,求出平均值,来评价了牺牲防蚀性。
在上述的JASO(M609-91)的循环数为240循环的时间点,在交叉切割伤附近5μm的区域中的最大的钢基体侵蚀深度小于0.1mm的情况下,评价为“AA”,在为0.1mm以上且小于0.4mm的情况下评价为“A”,在为0.4mm~0.6mm的情况下评价为“B”,在超过0.6mm的情况下评价为“C”。
关于红锈,在交叉切割伤附近5μm的区域中,在JASO 240循环的时间点未产生红锈的情况评价为“AA”,在180循环的时间点未产生红锈的情况评价为“A”,在60循环以上且小于120循环的时间点产生了红锈的情况评价为“B”,在小于60循环的时间点产生了红锈的情况评价为“C”。
/>
可知:在采用规定的镀浴组成、以适当的冷却条件制作的实施例中,通过获得规定的组织而具有很好的牺牲防蚀性。
另一方面,在未实施适当的合金化的水准(比较例7、8、14~19、27)、Al、Mg不足的水准(比较例1、2)中,不能够形成充分量的Fe2Al5相,性能处于劣势。特别是在合金化温度高的比较例19中,Fe-Zn相作为其他的金属间化合物形成,未形成Zn固溶Fe2Al5相。其结果,牺牲防蚀性特别低。另外,在过量地含有Ca、Si的水准(比较例25、26)中,在镀层中生成10%以上的使耐蚀性降低的Mg2Si、CaZn11等金属间化合物相,耐蚀性处于劣势。在Mg量过量的水准(比较例18)中,Zn固溶Fe2Al5相低于10%,并且,MgZn2相超过90%,因此耐蚀性处于劣势。在Al量过量的水准(比较例32)中,生成超过60%的Zn固溶Fe2Al5相,耐蚀性处于劣势。
实施例2
在实施例2中,对在实施例1中使用的几个实施例调查了耐LME性。也就是说,在实施例2中使用的镀层钢板的成分、组织、制造条件被记载于表1A、表1B中。
<耐LME性>
将在实施例1中使用的几个实施例涉及的镀层钢板切成200mm×20mm的大小,供于拉伸速度为5mm/分、夹头间距离为112.5mm的热拉伸试验,测定了在800℃的温度下的应力应变曲线。测定了所得到的应力应变曲线中的直到到达最大应力为止的应变量。
将该应变量与未实施镀覆的钢板样品比较,为80%以上的情况评价为“AA”,为60%以下的情况评价为“A”。
将各实施例的耐LME性的评价结果示于表3。各组织的面积分率的测定结果由于已记载于表2A、表2B中,因此在表3中未记载。
表3
区分 | No. | 耐LME性 |
实施例 | 3 | A |
实施例 | 4 | A |
实施例 | 5 | A |
实施例 | 6 | A |
实施例 | 9 | A |
实施例 | 10 | AA |
实施例 | 11 | AA |
实施例 | 12 | AA |
实施例 | 13 | AA |
实施例 | 20 | AA |
实施例 | 21 | AA |
实施例 | 22 | AA |
实施例 | 23 | AA |
实施例 | 24 | AA |
实施例 | 28 | AA |
实施例 | 29 | AA |
实施例 | 30 | AA |
实施例 | 31 | AA |
如表3所示,在各实施例中,耐LME性也很好。特别是在Zn固溶Fe2Al5相的面积分率大的例子中,耐LME性优异。
附图标记说明
20 镀层钢材(镀层钢板)
5 钢材
10 镀层
11 固溶有5%以上的Zn的Fe2Al5相(Zn固溶Fe2Al5相)
12 MgZn2相
100 镀层钢板(以往钢)
130 Zn-Al-Mg系热浸镀层
131 Zn/Al/MgZn2三元共晶组织
133 Al-Zn枝晶
Claims (11)
1.一种镀层钢材,其特征在于,具备钢材和设置于所述钢材的表面的镀层,
所述镀层以质量%计含有
Al:5.00~35.00%、
Mg:2.50~13.00%、
Fe:5.00~40.00%、
Si:0~2.00%、和
Ca:0~2.00%,
余量包含Zn及杂质,
在所述镀层的截面中,固溶了5质量%以上的Zn的Zn固溶Fe2Al5相的面积分率为10~60%,MgZn2相的面积分率为10~90%。
2.根据权利要求1所述的镀层钢材,其特征在于,
所述镀层以质量%计含有Al:10.00~30.00%。
3.根据权利要求1或2所述的镀层钢材,其特征在于,
所述镀层以质量%计含有Mg:4.00~11.00%。
4.根据权利要求1~3的任一项所述的镀层钢材,其特征在于,
所述镀层以质量%计含有Ca:0.03~1.00%。
5.根据权利要求1~4的任一项所述的镀层钢材,其特征在于,
在所述镀层的所述截面中,所述Zn固溶Fe2Al5相的面积分率为20~60%。
6.根据权利要求1~5的任一项所述的镀层钢材,其特征在于,
在所述镀层的所述截面中,Zn的固溶量小于5质量%的Zn非固溶Fe2Al5相的面积分率为10%以下。
7.根据权利要求1~6的任一项所述的镀层钢材,其特征在于,
在所述镀层的所述截面中,主要由Al相和Zn相构成的Al-Zn枝晶的面积分率为5%以下。
8.根据权利要求1~7的任一项所述的镀层钢材,其特征在于,
在所述镀层的所述截面中,Zn/Al/MgZn2三元共晶组织的面积分率为5%以下。
9.根据权利要求1~8的任一项所述的镀层钢材,其特征在于,
在所述镀层的所述截面中,FeAl相的面积分率为10%以下。
10.根据权利要求1~9的任一项所述的镀层钢材,其特征在于,
在所述镀层的所述截面中,块状Zn相的面积分率为10%以下。
11.根据权利要求1~10的任一项所述的镀层钢材,其特征在于,
在所述镀层的所述截面中,Mg2Si相的面积分率为10%以下。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019-080289 | 2019-04-19 | ||
JP2019080289 | 2019-04-19 | ||
PCT/JP2020/016714 WO2020213680A1 (ja) | 2019-04-19 | 2020-04-16 | めっき鋼材 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113677820A CN113677820A (zh) | 2021-11-19 |
CN113677820B true CN113677820B (zh) | 2023-10-03 |
Family
ID=72837295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202080026385.2A Active CN113677820B (zh) | 2019-04-19 | 2020-04-16 | 镀层钢材 |
Country Status (7)
Country | Link |
---|---|
US (1) | US11697266B2 (zh) |
EP (1) | EP3957763A4 (zh) |
JP (1) | JP7277822B2 (zh) |
KR (1) | KR102557220B1 (zh) |
CN (1) | CN113677820B (zh) |
MX (1) | MX2021011300A (zh) |
WO (1) | WO2020213680A1 (zh) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4163413A4 (en) * | 2021-07-09 | 2023-08-16 | Nippon Steel Corporation | PLATED STEEL MATERIAL |
KR102663847B1 (ko) * | 2022-03-31 | 2024-05-08 | 현대제철 주식회사 | 가공성 및 내식성이 우수한 도금 강재 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002302749A (ja) * | 2001-04-06 | 2002-10-18 | Sumitomo Metal Ind Ltd | 耐かじり性に優れた溶融Zn−Al系合金めっき鋼板とその製造方法 |
JP2017066523A (ja) * | 2015-09-29 | 2017-04-06 | 新日鐵住金株式会社 | Al−Mg系溶融めっき鋼材 |
CN108350554A (zh) * | 2015-10-26 | 2018-07-31 | 新日铁住金株式会社 | 镀覆钢板 |
WO2018169085A1 (ja) * | 2017-03-17 | 2018-09-20 | 新日鐵住金株式会社 | めっき鋼板 |
WO2018181391A1 (ja) * | 2017-03-31 | 2018-10-04 | Jfeスチール株式会社 | 溶融Al系めっき鋼板及び溶融Al系めっき鋼板の製造方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60138213A (ja) * | 1983-12-26 | 1985-07-22 | Mitsui Eng & Shipbuild Co Ltd | 複合サイクル廃熱回収発電プラント |
JP3779941B2 (ja) | 2002-01-09 | 2006-05-31 | 新日本製鐵株式会社 | 塗装後耐食性と塗装鮮映性に優れた亜鉛めっき鋼板 |
JP4579715B2 (ja) | 2004-03-08 | 2010-11-10 | 日新製鋼株式会社 | 耐食性,塗膜密着性,接着性に優れた化成処理鋼板 |
JP5640312B2 (ja) | 2007-10-24 | 2014-12-17 | 新日鐵住金株式会社 | 耐食性と溶接性に優れる亜鉛系合金めっき鋼材及び耐食性に優れる塗装鋼材 |
JP5230318B2 (ja) * | 2008-09-18 | 2013-07-10 | 新日鐵住金株式会社 | 高耐食性を有し加工性に優れためっき鋼材およびその製造方法 |
JP6112131B2 (ja) | 2014-04-23 | 2017-04-12 | Jfeスチール株式会社 | 溶融Al−Zn系めっき鋼板及びその製造方法 |
WO2018139619A1 (ja) | 2017-01-27 | 2018-08-02 | 新日鐵住金株式会社 | めっき鋼材 |
MX2019008677A (es) | 2017-01-27 | 2019-11-08 | Nippon Steel Corp | Producto de acero con recubrimiento metalico. |
JP2019080289A (ja) | 2017-10-27 | 2019-05-23 | トヨタ自動車株式会社 | 車載撮像装置 |
CN111868290B (zh) * | 2018-03-20 | 2022-05-31 | 日本制铁株式会社 | 热冲压成型体 |
WO2020213687A1 (ja) * | 2019-04-19 | 2020-10-22 | 日本製鉄株式会社 | めっき鋼板 |
-
2020
- 2020-04-16 WO PCT/JP2020/016714 patent/WO2020213680A1/ja active Application Filing
- 2020-04-16 MX MX2021011300A patent/MX2021011300A/es unknown
- 2020-04-16 US US17/435,613 patent/US11697266B2/en active Active
- 2020-04-16 EP EP20791238.7A patent/EP3957763A4/en active Pending
- 2020-04-16 CN CN202080026385.2A patent/CN113677820B/zh active Active
- 2020-04-16 JP JP2021514215A patent/JP7277822B2/ja active Active
- 2020-04-16 KR KR1020217030137A patent/KR102557220B1/ko active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002302749A (ja) * | 2001-04-06 | 2002-10-18 | Sumitomo Metal Ind Ltd | 耐かじり性に優れた溶融Zn−Al系合金めっき鋼板とその製造方法 |
JP2017066523A (ja) * | 2015-09-29 | 2017-04-06 | 新日鐵住金株式会社 | Al−Mg系溶融めっき鋼材 |
CN108350554A (zh) * | 2015-10-26 | 2018-07-31 | 新日铁住金株式会社 | 镀覆钢板 |
WO2018169085A1 (ja) * | 2017-03-17 | 2018-09-20 | 新日鐵住金株式会社 | めっき鋼板 |
WO2018181391A1 (ja) * | 2017-03-31 | 2018-10-04 | Jfeスチール株式会社 | 溶融Al系めっき鋼板及び溶融Al系めっき鋼板の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
US20220152983A1 (en) | 2022-05-19 |
JPWO2020213680A1 (ja) | 2021-12-23 |
US11697266B2 (en) | 2023-07-11 |
MX2021011300A (es) | 2021-10-22 |
KR102557220B1 (ko) | 2023-07-19 |
KR20210127991A (ko) | 2021-10-25 |
CN113677820A (zh) | 2021-11-19 |
JP7277822B2 (ja) | 2023-05-19 |
EP3957763A1 (en) | 2022-02-23 |
WO2020213680A1 (ja) | 2020-10-22 |
EP3957763A4 (en) | 2022-08-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN113557318B (zh) | 镀层钢板 | |
CN110392744B (zh) | 镀覆钢板 | |
CN110431249B (zh) | 镀覆钢板 | |
KR102384674B1 (ko) | 내식성, 내골링성, 가공성 및 표면 품질이 우수한 도금 강판 및 이의 제조방법 | |
CN113508186B (zh) | 熔融Al-Zn-Mg-Si-Sr镀覆钢板及其制造方法 | |
CN117026132A (zh) | 熔融Al-Zn-Mg-Si-Sr镀覆钢板及其制造方法 | |
CN113728121B (zh) | 镀层钢板 | |
KR102544940B1 (ko) | 도금 강판 | |
CN113677820B (zh) | 镀层钢材 | |
CN116157543A (zh) | 热浸镀Zn系镀敷钢板 | |
JP6880238B2 (ja) | 溶融めっき鋼線およびその製造方法 | |
TWI654338B (zh) | Fused Zn-based plated steel sheet with excellent corrosion resistance after painting | |
KR100667140B1 (ko) | 내식성 및 가공성이 우수한 용융 Sn-Zn계 도금 강판 | |
JPH1088309A (ja) | 摺動性及び電着塗装時の耐クレータリング性に優れた合金化溶融亜鉛めっき鋼板及びその製造方法 | |
KR101568527B1 (ko) | 드로스 생성이 억제된 용융 아연합금 도금액 및 고내식성 용융 아연합금 도금강판 | |
CN116113719A (zh) | 镀敷钢板 |
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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant |