WO2023210072A1 - Corps lié - Google Patents

Corps lié Download PDF

Info

Publication number
WO2023210072A1
WO2023210072A1 PCT/JP2023/001511 JP2023001511W WO2023210072A1 WO 2023210072 A1 WO2023210072 A1 WO 2023210072A1 JP 2023001511 W JP2023001511 W JP 2023001511W WO 2023210072 A1 WO2023210072 A1 WO 2023210072A1
Authority
WO
WIPO (PCT)
Prior art keywords
plating layer
opening
joined body
mass
plating
Prior art date
Application number
PCT/JP2023/001511
Other languages
English (en)
Japanese (ja)
Inventor
晋 上野
浩雅 莊司
Original Assignee
日本製鉄株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本製鉄株式会社 filed Critical 日本製鉄株式会社
Priority to JP2023531120A priority Critical patent/JP7332978B1/ja
Publication of WO2023210072A1 publication Critical patent/WO2023210072A1/fr

Links

Images

Classifications

    • 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
    • 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
    • C23C2/04—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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/12—Electrodes characterised by the material
    • C23F13/14—Material for sacrificial anodes
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/16—Electrodes characterised by the combination of the structure and the material

Definitions

  • the present invention relates to a zygote.
  • steel materials that have been surface-treated have various openings, such as holes for fastening parts such as screws and bolts, holes for transportation, and holes for positioning. There are many things.
  • the steel substrate is often exposed in areas adjacent to these openings.
  • the surface treatment applied to the steel material is painting, corrosion will progress from the exposed parts of the steel base.
  • the corrosion rate can be suppressed to some extent due to the sacrificial anticorrosion ability of the zinc-based plating, but a longer life cannot be expected.
  • the vicinity of the opening may be repaired by painting, etc., but this poses a problem in that it requires cost and man-hours.
  • Patent Document 1 the technique proposed in Patent Document 1 is complicated as it requires multiple painting operations, and there is concern that the construction period will be prolonged due to the curing time for drying.
  • paints are not only expensive, but also lose their repair effectiveness early if the coating is insufficient.
  • corrosion of the member in which the opening is located and the member blocking the opening progresses early, and the structure as a whole cannot be expected to have a long life.
  • the present invention has been made in view of the above problems, and an object of the present invention is to further improve the corrosion resistance of the opening and its surroundings in a joined body using steel materials provided with an opening. It's about letting people know.
  • the inventor of the present invention has made extensive studies and found that after covering at least the opening with a steel material having a plating layer, the opening and the exposed parts of the steel base existing around it will corrode.
  • the idea was to elute the plating components from the plating layer when exposed to the environment.
  • the present inventors came up with the idea that corrosion resistance could be further improved by allowing the eluted plating components to reach the openings and exposed areas of the steel base.
  • the gist of the present invention which was completed as a result of further studies based on this idea, is as follows.
  • the plating layer of the member includes, in mass %, Al: more than 15.0% and 30.0% or less, Mg: more than 5.0% and 15.0% or less, Sn: 0% to 0.70%, Ca: 0.03% to 0.60%, Si: 0.01% to 0.75%, Ti: 0% to 0.25%, Ni: 0% to 1.00%, Co: 0% to 0.25 %, Fe: 0% to 5.0%, B: 0% to 0.5%, the remainder being Zn and impurities, and the first member on the side not in contact with the second member.
  • the circumferential length of the opening of the member is L [mm]
  • the area of the exposed portion of the first member that is not in contact with the second member is S S [mm 2 ]
  • one side of the second member When the average deposition amount of the plating layer per unit is M m [g/m 2 ], when L ⁇ 100, M m /S S ⁇ 0.008 holds true, and when L ⁇ 100, L ⁇ M m /S S ⁇ 1.300 is established, and the total content of Mg, Al, and Zn (unit: :% by mass) are respectively expressed as [Mg]', [Al]', and [Zn]', and the first member and the second member are at the position of the opening of the first member.
  • the plating layer of the second member on the side that is in contact with the first member is cut using an energy dispersive X-ray analyzer (FE) of a field emission scanning electron microscope.
  • FE energy dispersive X-ray analyzer
  • the contents of Mg, Al, and Zn (unit: mass %) obtained by area analysis from the surface layer to a depth of 3 ⁇ m using SEM/EDX) are expressed as [Mg], [Al], and [Zn], respectively.
  • the ratio R calculated based on the analysis result of the surface analysis is defined as in the following formula (1), and in the cross section, from the center of the opening starting from one end of the opening.
  • R A which is the value of the ratio R at position A, is within the range of 1.10 to 5.00, and in the cross section, the opening
  • R B is within the range of 0.30 to 5.00.
  • FIG. 1 is an explanatory diagram schematically showing an example of a joined body according to an embodiment of the present invention. It is an explanatory view for explaining an example of the structure of the joined body concerning the same embodiment. It is an explanatory view showing typically an example of the structure of the 1st member in the joined body concerning the same embodiment. It is an explanatory view showing typically an example of the structure of the 2nd member in the joined body concerning the same embodiment. It is an explanatory view showing typically an example of the structure of the 2nd member in the joined body concerning the same embodiment. It is an explanatory view for explaining a plating layer in a joined body concerning the same embodiment. It is an explanatory view for explaining a plating layer in a joined body concerning the same embodiment.
  • FIG. 1 is an explanatory diagram schematically showing an example of a joined body according to the present embodiment.
  • FIG. 1 schematically shows a joined body 1 having a box-like outer shape as an example of such a joined body.
  • Examples of the joined body 1 having such a box-like external shape include a power distribution board, an outdoor unit, a water heater, and the like.
  • openings 3 having various shapes, such as holes for installing fastening parts such as screws and bolts, holes for transportation, holes for positioning, etc. However, they are often located in various locations.
  • the joined body 1 of interest in this embodiment is not limited to the box-shaped one described above.
  • the bonded body 1 of interest in this embodiment may be a plate-shaped bonded body using plate-shaped steel materials, such as the roof or wall of a building, or a plate-shaped bonded body such as a solar panel frame. It may be a joint using various types of steel sections, it may be a joint using various H-section steel or square columns like the framework of a structure, or it may be a joint using various types of H-section steel or square columns such as the framework of a structure, or it may be used for signs, traffic lights, guardrails, etc. It may also be a joined body using various types of steel pipes.
  • FIG. 2 is an explanatory diagram for explaining an example of the structure of the joined body according to the present embodiment, and is a part of a cross section of the joined body according to the present embodiment cut in the thickness direction of the steel material used as the raw material. This is a schematic diagram.
  • the joined body 1 includes a first member 10 in which an opening 11 that penetrates the steel material is present, and is provided so as to cover at least the opening 11 of the first member 10. and the second member 20 that was joined.
  • FIG. 3 is an explanatory diagram schematically showing an example of the structure of the first member 10 in the joined body 1 according to the present embodiment.
  • the first member 10 according to the present embodiment includes a base steel material 101 as an example of a steel base material, and a surface treatment layer 103 located on the surface of the base steel material 101.
  • At least a portion of the first member 10 is provided with various openings as illustrated in FIGS. 1 and 2.
  • FIG. 3 shows a case where the surface treatment layer 103 is provided on both sides of the base steel material 101, the surface treatment layer 103 may be provided only on one surface of the base steel material 101.
  • the base steel material 101 used as the base material of the first member 10 according to the present embodiment is not particularly limited, and may be of various types depending on the mechanical strength (for example, tensile strength) required for the joined body 1. It is possible to use steel materials of Examples of such base steel materials 101 include various Al-killed steels, ultra-low carbon steels containing Ti, Nb, etc., and high-strength ultra-low carbon steels further containing reinforcing elements such as P, Si, and Mn. Mention may be made of various steel materials such as steel.
  • the thickness of the base steel material 101 is not particularly limited, and may be set as appropriate depending on the mechanical strength required for the joined body 1.
  • the surface treatment layer 103 is a layer provided to improve the corrosion resistance of the base steel material 101 in the first member 10.
  • the surface treatment for forming the surface treatment layer 103 is not particularly limited, and may include, for example, various plating treatments and painting treatments using various antirust paints (including powder coating). It is possible to apply various known processing methods such as. Further, as the surface treatment for forming the surface treatment layer 103, a combination of a plurality of treatment methods may be used.
  • the surface treatment layer 103 is preferably a surface treatment layer containing Zn.
  • a surface treatment layer containing Zn By providing a surface treatment layer containing Zn, it becomes possible to utilize the sacrificial anticorrosion ability of Zn, and it becomes possible to further improve the corrosion resistance of the first member 10.
  • Specific examples of the surface treatment layer containing Zn are not particularly limited.
  • the surface treatment layer containing Zn may be, for example, various zinc-based plating layers, or may be one in which the surface of the plating layer is subjected to chemical conversion treatment (i.e., plating layer + chemical conversion treatment film). Alternatively, it may be a coating film using a paint containing Zn.
  • the surface treatment layer 103 may have a multilayer structure composed of a plurality of layers.
  • the outermost surface of the surface treatment layer 103 may be a coating film formed using various paints.
  • the design of the joined body 1 can be improved by forming a coating film that becomes the outermost surface of the surface treatment layer 103 using a paint containing various colored pigments.
  • various other paints as the paint for forming the coating film, various functions expressed by additives contained in the paint can be applied to the bonded body 1.
  • a desired coating may be applied after performing a pre-painting treatment such as phosphate treatment before painting.
  • the second member 20 includes a base steel material 201 as an example of a steel base material, and a plating layer 203 located on the surface of the base steel material 201. Further, as shown in FIG. 4B, the second member 20 according to this embodiment may further include a chemical conversion coating 205 on the surface of the plating layer 203.
  • FIGS. 4A and 4B illustrate the case where the plating layer 203 and the chemical conversion coating 205 are provided on both sides of the base steel material 201, the plating layer 203 and the chemical conversion coating 205 are provided on one side of the base steel material 201. It may be provided only on the surface.
  • the base steel material 201 used as the base material of the second member 20 according to the present embodiment is not particularly limited, and various types may be used depending on the mechanical strength (for example, tensile strength) required for the joined body 1. It is possible to use steel materials of Examples of such base steel material 201 include various types of Al-killed steel, ultra-low carbon steel containing Ti, Nb, etc., and high-strength ultra-low carbon steel further containing reinforcing elements such as P, Si, Mn, etc. Mention may be made of various steel materials such as steel.
  • the thickness of the base steel material 201 is not particularly limited, and may be set as appropriate depending on the mechanical strength etc. required of the joined body 1.
  • the plating layer 203 in the second member 20 not only improves the corrosion resistance of the second member 20, but also prevents the opening of the first member 10 from forming when the joined body 1 is exposed to a corrosive environment. This layer functions to ensure corrosion resistance around the portion 11.
  • the plating layer 203 has a chemical composition in mass %: Al: more than 15.0% and 30.0% or less, Mg: more than 5.0% and 15.0% or less, Ca: 0.03 % to 0.60%, Si: 0.01% to 0.75%, and the remainder consists of Zn and impurities.
  • Al is an element necessary to constitute the main phase (Zn--Al--Mg alloy phase) of the plating layer 203 according to this embodiment. If the Al content in the plating layer 203 is 15.0% by mass or less, the corrosion resistance of the joined body 1 cannot be ensured. Therefore, in the plating layer 203 according to this embodiment, the Al content is more than 15.0% by mass. The Al content is preferably 17.0% by mass or more. When the Al content falls within the above range, it becomes possible to further improve the corrosion resistance of the joined body 1.
  • the Al content in the plating layer 203 exceeds 30.0% by mass, the Al phase that functions as a cathode when placed in a corrosive environment increases excessively, and corrosion of the base steel material 201 progresses. Therefore, the corrosion resistance of the joined body 1 cannot be ensured. Therefore, in the plating layer 203 according to this embodiment, the Al content is 30.0% by mass or less. The Al content is preferably 25.0% by mass or less.
  • Mg is an element necessary to constitute the main phase (Zn--Al--Mg alloy phase) of the plating layer 203 according to this embodiment. Therefore, in the plating layer 203 according to this embodiment, the Mg content is more than 5.0% by mass. By setting the Mg content within the above range, it becomes possible to ensure the corrosion resistance of the joined body 1.
  • the Mg content in the plating layer 203 exceeds 15.0% by mass, the anode dissolution of the plating layer tends to proceed when placed in a corrosive environment, so it is necessary to ensure the corrosion resistance of the joined body 1. I can't. Therefore, in the plating layer 203 according to this embodiment, the Mg content is 15.0% by mass or less. The Mg content is preferably 13.0% by mass or less. By setting the Mg content within the above range, it becomes possible to further improve the corrosion resistance of the joined body 1.
  • Ca 0.03 to 0.60% by mass
  • Ca is an element that forms an intermetallic compound phase with Al and Zn when contained in the plating layer 203. Further, since Si is contained together with Ca in the plating layer 203, Ca forms an intermetallic compound phase with Si. Formation of these intermetallic compound phases makes it possible to ensure the corrosion resistance of the joined body 1. The effect of forming such an intermetallic compound phase is achieved by setting the Ca content to 0.03% by mass or more.
  • the Ca content in the plating layer 203 is preferably 0.05% by mass or more.
  • the Ca content in the plating layer 203 exceeds 0.60% by mass, the corrosion resistance of the joined body 1 decreases. From this viewpoint, the Ca content in the plating layer 203 is 0.60% by mass or less. The Ca content in the plating layer 203 is preferably 0.40% by mass or less.
  • Si is an element that suppresses excessive growth of the Fe--Al intermetallic compound phase formed at the interface between the plating layer 203 and the base steel material 201 and improves the adhesion between the plating layer 203 and the base steel material 201.
  • the effect of suppressing the formation of such a Fe--Al intermetallic compound phase is achieved by setting the Si content to 0.01% by mass or more.
  • the Si content in the plating layer 203 is preferably 0.03% by mass or more.
  • the Si content in the plating bath for manufacturing the plating layer 203 is too high, the viscosity of the plating bath may increase more than necessary, and the operability of plating may deteriorate. Therefore, by adjusting the Si content in the plating bath from the viewpoint of plating operability, the Si content in the plating layer 203 becomes 0.75% by mass or less.
  • the Si content in the plating layer 203 is preferably 0.65% by mass or less.
  • the remainder of the above Al, Mg, Ca, and Si is Zn and impurities.
  • Zn is an element necessary for forming the main phase (Zn-Al-Mg alloy phase) of the plating layer 203 according to the present embodiment, and is an important element for improving the corrosion resistance of the joined body 1. .
  • the chemical composition of the plating layer 203 according to the present embodiment is selectively made of Sn: 0% to 0.70%, Ti: 0% to 0.25%, and Ni in place of a portion of the remaining Zn.
  • Sn is an element that increases the Mg elution rate when the plating layer 203 containing Zn, Al, and Mg is placed in a corrosive environment.
  • Mg ions are supplied to the exposed portion of the base steel material 201, further improving the sacrificial corrosion protection.
  • addition of excessive Sn may excessively accelerate the Mg elution rate and reduce the corrosion resistance of the joined body 1.
  • Such an increase in the Mg elution rate becomes significant when the Sn content exceeds 0.70% by mass, so the Sn content is 0.70% by mass or less.
  • the Sn content is more preferably 0.50% by mass or less.
  • the lower limit of the Sn content is not particularly specified and may be 0% by mass, but when Sn is included, the Sn content may be 0.005% by mass or more. preferable. This makes it possible to further improve the sacrificial corrosion protection of the plating layer 203.
  • Ti and Ni are contained in the plating layer 203, when the second member 20 having the plating layer 203 is welded, these elements will be added to the Al-Fe alloy layer produced by welding. It becomes possible to improve the corrosion resistance of the welded part that is incorporated and formed. Such an effect of improving corrosion resistance is exhibited when the content of either Ti or Ni in the plating layer 203 is 0.005% by mass or more. Therefore, when at least one of Ti and Ni is contained in the plating layer 203, it is preferable that the content of each of these elements is independently 0.005% by mass or more.
  • the plating bath for forming the plating layer 203 When forming the plating layer 203 in which the Ti content exceeds 0.25% by mass or the Ni content exceeds 1.0% by mass, the plating bath for forming the plating layer 203 These elements form various intermetallic compound phases, leading to an increase in the viscosity of the plating bath, making it impossible to manufacture the second member 20 with good plating properties. Therefore, the Ti content in the plating layer 203 is 0.25% by mass or less, and the Ni content in the plating layer 203 is 1.0% by mass or less. The Ti content is more preferably 0.20% by mass or less. Further, the Ni content is more preferably 0.85% by mass or less.
  • the Co content in the plating layer 203 exceeds 0.25% by mass, the corrosion resistance of the plating layer 203 may be reduced. Therefore, the Co content is 0.25% by mass or less.
  • Elements constituting the steel material may be mixed into the plating layer 203 from the base steel material 201 that is the base material.
  • elements constituting the base steel material 201 are likely to mix into the plating layer 203 due to mutual diffusion of elements due to solid-liquid reaction between the base steel material 201 and the plating layer 203. Due to the mixing of such elements, the plating layer 203 may contain a certain amount of Fe. If the above-mentioned mutual diffusion is promoted, the adhesion between the base steel material 201 and the plating layer 203 will further improve. From the viewpoint of improving the adhesion between the base steel material 201 and the plating layer 203, the Fe content in the plating layer 203 is preferably 0.05% by mass or more.
  • Fe may be intentionally added to the plating bath used when manufacturing the plating layer 203 within a range that does not impair the effects of the present invention.
  • the Fe content in the plating layer 203 is 5.0% by mass or more, a high melting point intermetallic compound of Fe and Al is formed in the plating bath, and the high melting point intermetallic compound becomes dross. This is not preferable because it adheres to the plating layer and significantly reduces the appearance quality.
  • the Fe content in the plating layer 203 is 5.0% by mass or less.
  • the Fe content in the plating layer 203 is more preferably 3.5% by mass or less.
  • the chemical composition of the plating layer 203 is determined by ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometry) or ICP-MS (Inductively Coupled Plasma Mass Spec). trometry).
  • ICP-AES Inductively Coupled Plasma Atomic Emission Spectrometry
  • ICP-MS Inductively Coupled Plasma Mass Spec. trometry
  • ICP-AES Inductively Coupled Plasma Atomic Emission Spectrometry
  • ICP-MS Inductively Coupled Plasma Mass Spec.
  • the second member 20 is immersed in a 10% HCl aqueous solution containing an inhibitor for about 1 minute, the plating layer portion is peeled off, and a solution in which this plating layer is dissolved is prepared.
  • the resulting solution can be analyzed by ICP-AES or ICP-MS to obtain the overall average chemical composition of the plating layer 203.
  • Mg among the above chemical components is concentrated in the surface layer of the plating layer 203. This enriched state of Mg will be explained below.
  • the average amount of the plating layer 203 deposited on one side of the second member 20 according to the present embodiment is within the range of 20 to 600 g/m 2 while satisfying the conditions described below. .
  • the average adhesion amount per side of the plating layer 203 is more preferably 40 to 400 g/m 2 .
  • the plating layer 203 having the components described above has a Vickers hardness specified by JIS Z2244-1:2009 (more specifically, when the load is 10 gf (1 gf is about 9.8 mN) It has excellent hardness, with a Vickers hardness of 150 Hv or more. Therefore, when forming the opening 11 in the first member 10, burrs may be generated from the first member 10 side to the second member 20 side, but the plating layer 203 itself is hard. Therefore, it is possible to prevent the plating layer 203 from being scratched by burrs and partially peeling off.
  • the chemical conversion coating 205 in the second member 20 is a coating whose resistance is less than 1 ⁇ 10 ⁇ 2 ⁇ when measured by a four-probe four-probe method.
  • Such resistance can be measured using various resistivity meters (for example, Lorestar GX MCP-T700, Probe: MCP-TP03P: both manufactured by Nitto Seiko Analytech Co., Ltd.). Since the chemical conversion coating 205 exhibits the resistance as described above, the chemical conversion coating 205 exhibits a sacrificial anticorrosion effect, making it possible to further improve the corrosion resistance of the joined body 1. Note that the lower limit of the resistance when the chemical conversion coating 205 is measured by the four-terminal four-probe method is not particularly defined, and the lower the resistance, the better.
  • the specific components of the chemical conversion coating 205 according to the present embodiment are not particularly limited as long as they exhibit the above-mentioned resistance, and the chemical conversion coating 205 can be prepared using various known chemical conversion agents. It is possible to form Examples of such chemical conversion treatment agents include Palcoat E300 series chemical conversion treatment agents manufactured by Nippon Parkerizing Co., Ltd., and the like.
  • the thickness of the chemical conversion coating 205 according to the present embodiment is not particularly limited, but is preferably within the range of 0.2 to 3.0 ⁇ m, for example.
  • FIGS. 5 and 6 are explanatory diagrams for explaining the plating layer 203 in the joined body according to this embodiment.
  • the content (unit: mass %) of Mg, Al, and Zn in the entire plating layer 203 has been measured by the method described previously.
  • the surface enrichment of Mg in the plating layer 203 as described below contributes to the corrosion resistance of the joined body 1 (particularly the corrosion resistance in the vicinity of the opening 11). This is because the plating layer 203 on the side that is in contact with the member 10 plays a main role.
  • the total contents (unit: mass %) of Mg, Al, and Zn are respectively [Mg]', [Al]', and [ Zn]'.
  • the upper part of FIG. 5 is a top view of the joined body 1 in the vicinity of the position where the opening 11 of the first member 10 is formed when viewed from above.
  • the lower part of FIG. 5 is a cutaway view obtained by cutting the top view shown in the upper part along the AA cutting line in the thickness direction of the first member 10 and the second member 20.
  • an opening 11 having a hole passing through the base steel material 101 is present in a part of the first member 10 according to the present embodiment. Further, in the first member 10, there is an exposed portion 13 adjacent to the opening 11 (more specifically, the hole), which is a portion where the steel base (i.e., the base steel 101) is exposed. are doing. Here, there may be a burr 15 in the opening 11 that faces the second member 20 side. Furthermore, various iron oxides 17 may adhere to the surface of the exposed portion 13.
  • the size of the burr 15 depends on the thickness of the base steel material 101, the drilling conditions for providing the opening 11, etc., but for example, 0. It is preferably 2 mm or less. If the size of the burr 15 is 0.2 mm or less, the surface of the second member 20 can be prevented from being excessively damaged by the burr 15, and the corrosion resistance of the second member 20 can be ensured.
  • various iron oxides 17 that can adhere to the surface of the exposed portion 13 include, for example, ⁇ -FeOOH, ⁇ -FeOOH, ⁇ -FeOOH, Fe(OH) 2 , Fe(OH) 3 , Fe 2 O 3 , Fe 3 O 4 , FeO, etc.
  • the corrosion resistance is lower than in other portions where the surface treatment layer 103 is present. Therefore, when the exposed portion 13 is exposed to a corrosive environment, a difference occurs between the corrosion resistance of the exposed portion 13 and the corrosion resistance of the portion where the surface treatment layer 103 is present. Therefore, in the assembled body 1 according to the present embodiment, components of the plating layer are appropriately eluted as ions from the plating layer 203 of the second member 20 to function as a protective coating for the exposed portion 13. Zn and Mg constituting the plating layer 203 exhibit sacrificial anticorrosion ability and are therefore suitable as the main components of the protective coating. It has been separately confirmed that even when the chemical conversion coating 205 is provided as an upper layer of the plating layer 203, the elution of the plating components as described above occurs.
  • Mg exists in the plating layer 203 as an intermetallic compound. Mg exhibits better sacrificial anticorrosion ability than Al, and also has high mobility of Mg ions after elution, so it is an element that is particularly useful as the main component of the protective coating. Therefore, in the plating layer 203 according to the present embodiment, Mg is intentionally concentrated in the vicinity of the surface of the plating layer 203 to facilitate the elution of Mg.
  • the surface enrichment state of Mg as described above is different from that of the first member 10 and the second member 20 as shown in the lower part of FIG.
  • the plating layer 203 on the side in contact with the first member 10 was examined using a field emission scanning electron microscope (FE-).
  • the evaluation is performed by area analysis using an energy dispersive X-ray spectroscopy (EDX) (hereinafter abbreviated as "FE-SEM/EDX").
  • EDX energy dispersive X-ray spectroscopy
  • a surface analysis using FE-SEM/EDX is performed focusing on two locations in the cross section of the plating layer 203. That is, these are the two locations, position A and position B, in the cross-sectional view in the lower part of FIG.
  • Position A is a position 20 mm away from the center of the opening 11 starting from one end of the opening 11 in the cross section shown in the lower part of FIG.
  • position B is the position of one end of the opening 11 in the cross section shown in the lower part of FIG.
  • the above cross-sectional observation was performed using an FE-SEM/EDX such as JSM-7800F/EDX manufactured by JEOL Ltd., with an acceleration voltage of 15 kV, an emission current of 65 ⁇ A, and a working distance of 10 mm, to a depth of 3 ⁇ m.
  • the analysis is performed five times in succession with a size of 20 ⁇ m width.
  • the contents of Mg, Al, and Zn (unit: mass %) in the region from the surface layer to a depth of 3 ⁇ m obtained in this way are expressed as [Mg], [Al], and [Zn], respectively.
  • a ratio R as shown in the following equation (101) is defined based on the analysis result of the surface analysis. More specifically, the ratio R at position A is written as RA , and the ratio R at position B is written as RB .
  • the ratio R A and the ratio R B are respectively calculated as described above.
  • the average value of the three ratios RA obtained is defined as the ratio RA in the zygote 1 of interest.
  • the average value of the three ratios R B obtained is set as the ratio R B in the zygote 1 of interest.
  • the value of the ratio R A is 1.10 to 5.00. That is, at position A, the Mg content in the region from the surface of the plating layer 203 to a depth of 3 ⁇ m is 1.10 to 5.00 times the Mg content in the entire plating layer 203. There is. Position A is a position 20 mm away from the center of the opening 11 starting from one end of the opening 11, so it is a position that becomes the starting point of corrosion when the joined body 1 is exposed to a corrosive environment. Therefore, it can be considered as a sufficiently distant position. Therefore, it can be said that the ratio RA is a value that reflects the surface concentration state of Mg that the plating layer 203 originally has.
  • the ratio R A By setting the ratio R A to the above value, it is possible to realize the effect of forming a protective film accompanying the elution of Mg when exposed to a corrosive environment, as mentioned above.
  • the value of the ratio R A is less than 1.10, the above-mentioned effect of forming a protective film due to the elution of Mg cannot be realized.
  • the value of the ratio R A is preferably 1.50 or more.
  • the practical upper limit of the ratio RA is 5.00.
  • the value of the ratio RA is preferably 4.00 or less.
  • the ratio RB at position B is equal to or less than the ratio RA .
  • the value of the ratio R B at the position B is equal to the value of the ratio RA at position A.
  • the value of the ratio RB becomes less than the ratio RA , and when the protective film is formed on the exposed portion 13, Mg etc.
  • the value of the ratio R B is preferably equal to or less than the ratio R A and within the range of 0.30 to 5.00.
  • the protective film forming effect accompanying the elution of Mg as described above may be reduced.
  • the practical upper limit of the ratio R B is 5.00.
  • the value of the ratio R B is more preferably less than or equal to the ratio R A and within the range of 0.50 to 4.00.
  • the farthest distance from the plating layer 203 to the exposed portion 13 is the maximum distance over which components that can become a protective film, such as Mg, must move.
  • a protective film such as Mg
  • the distance from the plating layer 203 is short.
  • point p in FIG. 5 is the farthest point from the plating layer 203 in the exposed portion 13 on the side not in contact with the plating layer 203. The farther the distance from the plating layer 203, the longer it takes to form a protective film, and the plating layer 203 continues to dissolve due to sacrificial corrosion protection until the protective film is formed. The earlier the protective film is generated, the less the plating components such as Mg will be eluted due to sacrificial corrosion protection, and the longer the life of the joined body 1 can be extended.
  • the area of the exposed portion 13 is too large, not only will a large amount of the plating layer (Mg, Zn, etc.) eluted due to sacrificial corrosion protection, but also the time required for a protective film to be formed on the exposed portion 13 will be prolonged. turn into.
  • the plating layer Mg, Zn, etc.
  • the present inventors determined that (a) the circumferential length L [mm] of the opening 11 of the first member 10 on the side not in contact with the second member 20, (b) the first Area S S [mm 2 ] of the exposed portion 13 that is not in contact with the second member 20 in the member 10 , (c) Average adhesion amount of the plating layer 203 per one side of the second member 20 M m [g/m 2 ], we have come to the conclusion that three types of factors should be considered.
  • the circumferential length L of the opening 11 corresponds to the circumferential length of the ellipse in the case of an elliptical opening 11 as shown in the upper part of FIG. 5, for example.
  • a design value described in a design drawing etc. when manufacturing the joined body 1 may be used, or a device capable of measuring the length of an arbitrary curve, such as a curve meter, may be used. Actual values measured using the same method may also be used.
  • the area S S of the exposed portion 13 that is not in contact with the second member 20 is not only the area of the exposed portion 13 on the upper surface of the first member 10 but also exists as the wall surface of the opening 11. , the exposed portion of the base steel material 101 shall also be considered.
  • the exposed portion of the base steel material 101 shall also be considered.
  • the obtained captured image is subjected to a commercially available image editing method.
  • a boundary line is set to surround the exposed portion 13 using an application, and the area of the portion surrounded by the boundary line is specified.
  • the area of the exposed portion of the base steel material 101 that exists as the wall surface of the opening 11 is calculated from the plate thickness of the base steel material 101 and the circumferential length L of the opening 11 . From these results, it is possible to specify the area SS .
  • the average adhesion amount Mm of the plating layer 203 is measured as follows. That is, after removing the part corresponding to the second member 20 from the joined body 1, a sample (the back side is taped and sealed to prevent it from dissolving) is cut out to a size of 30 mm x 30 mm. , measure its mass in advance. Then, the sample is immersed in a 10% HCl aqueous solution containing an inhibitor, the plating layer 203 is removed by pickling, and the mass of the sample after pickling is measured. It is possible to determine the amount of plating layer 203 deposited per side from the change in mass of the sample before and after pickling.
  • the inventor of the present invention has conducted extensive studies on the relationship between the three factors described above, and has found that in order to appropriately generate a protective film and improve the corrosion resistance of the opening 11 and its surroundings (i.e., the exposed portion 13), For L ⁇ 100mm, it is necessary that M m /S S ⁇ 0.008 holds true, and when L ⁇ 100 mm, L ⁇ M m /S S ⁇ 1.300 holds true. We found that it is necessary to do so. By establishing the above relationship, when the exposed portion 13 is exposed to a corrosive environment, a protective film is quickly generated, improving the corrosion resistance of the exposed portion 13, and extending the life of the joined body 1. can do.
  • the value of (M m /S S ) is preferably 0.020 or more.
  • the upper limit of (M m /S S ) is not particularly defined, and it is preferable that the denominator S S becomes smaller and the value of (M m /S S ) becomes larger.
  • Mm average adhesion amount
  • the value of (L ⁇ M m /S S ) is preferably 1.400 or more.
  • the upper limit of (L ⁇ M m /S S ) is not particularly defined, and it is preferable that the denominator S S becomes smaller and the value of (L ⁇ M m /S S ) becomes larger.
  • the thickness of the base steel material 101, the drilling conditions, etc. about 600,000 becomes a practical upper limit.
  • the joined body 1 according to the present embodiment has been described in detail above with reference to FIGS. 1A to 6.
  • the method for manufacturing a joined body according to the present embodiment includes (a) a steel material having a surface treatment layer, an opening penetrating the steel material, and an exposed steel substrate adjacent to the opening. (b) The first member is made of a steel material having a plating layer, and the plating layer has a specific surface concentration of Mg as described above. (c) a step of joining the prepared first member and second member.
  • the second member is By controlling the average deposited amount M m [g/m 2 ] of the plating layer per side of the member, the peripheral length L, the area S S of the exposed part, and the average deposited amount Mm of the plating layer are set as explained earlier. meet certain conditions.
  • the average adhesion amount M m [g/m 2 ] is controlled according to the peripheral length L and the area SS of the exposed portion.
  • the opening forming process so that the area S of the exposed part satisfies the conditions according to the design values of the peripheral length L and the average adhesion amount M m , the area S of the exposed part can be reduced. May be controlled.
  • the method for forming the surface treatment layer on the steel material constituting the first member is not particularly limited, and various known methods may be used depending on the type of surface treatment layer to be formed. is possible. Further, the first member may be processed in advance into a desired shape before joining the second member.
  • a thermal spray method, a cold spray method, a sputtering method, a vapor deposition method, an electroplating method, etc. can be applied.
  • the hot-dip plating method is the most preferable in terms of cost.
  • a base steel plate used as a base material is rolled by the Sendzimir method to a desired thickness, then wound into a coil shape and installed in a hot-dip plating line.
  • the steel sheet is continuously fed through the coil as it is unwound from the coil.
  • the steel plate is heated and reduced at 800°C in an N 2 -5% H 2 gas atmosphere in an environment with an oxygen concentration of 20 ppm or less using annealing equipment installed on the line, and then It is air-cooled with N2 gas until the bath temperature of the plating bath is +20°C, and then immersed in the plating bath.
  • a plating alloy in a molten state having the above-mentioned chemical components is prepared in the plating bath.
  • the temperature of the plating bath is set to be higher than the melting point of the plating alloy (for example, about 400 to 600° C.).
  • a pure metal purity of 99% or more
  • a predetermined amount of alloy metals are mixed so as to have the composition of the plating layer as described above, and are completely melted to form an alloy using a high frequency induction furnace, an arc furnace, or the like.
  • the alloy mixed with predetermined components is melted in the atmosphere, and the resulting melt is used as a plating bath.
  • a steel plate is immersed in the above-mentioned plating bath and then pulled up at a predetermined pulling speed. At this time, the amount of plating deposited is controlled using, for example, N 2 wiping gas so that the formed plating layer has a desired thickness.
  • N 2 wiping gas used as a plating operating conditions.
  • the cooling rate until the plating solidifies is set in the range of 10 to 50°C/sec. or the surface of the base steel material is physically or chemically processed so that the surface roughness Ra specified in JIS B0601:2001 is 0.1 ⁇ m or more. All you have to do is carry out the following. Moreover, by controlling the cooling rate during plating solidification after the surface roughness of the base steel material is in the above state, it is possible to make the surface concentration state of Mg more preferable.
  • the method of joining the first member and the second member is not particularly limited.
  • various known joining methods can be used, such as welding using various welding methods, joining using fastening parts such as screws, bolts, caulking, etc., thermocompression bonding, adhesion using various adhesives, etc. .
  • the first member is a 1.6 mm thick, 150 mm x 150 mm steel plate (cold-rolled steel plate and hot-dip galvanized steel plate (GI), both manufactured by Nippon Steel Corporation) as shown in Table 1 below. (manufactured by the company) was prepared. V-PET #1340QD manufactured by Dainippon Toyo Co., Ltd. was used for powder coating, and the film thickness was set to 50 ⁇ m. Moreover, as a non-chromate chemical conversion treatment agent, Palcoat E384 manufactured by Nippon Parkerizing Co., Ltd. was used.
  • a punching process was carried out under the conditions shown in Table 2 below to form an opening in the approximate center of the first member thus prepared. Note that the circumferential length L of the opening and the area S S of the exposed portion adjacent to the opening were measured by the method described above. Note that burrs were present around the formed opening toward the punching direction side in the punching process (in other words, the side where the second member is located).
  • a hot-dip plating bath having the chemical components shown in Table 3 below was prepared.
  • a second member (150 mm x 150 mm) was formed by plating a 0.8 mm thick cold-rolled steel plate (manufactured by Nippon Steel Corporation) using an existing hot-dip plating process and controlling the amount of plating per side (M m ). prepared.
  • the cooling rate until the plating solidified was controlled within the range of 10 to 50° C./sec.
  • the cooling rate until the plating solidified was controlled at over 50° C./sec.
  • the Mg, Al, and Zn contents in the entire plating layer were measured by the method described above, and are shown in Table 3 below.
  • the bolts were removed from the evaluation sample after the cyclic corrosion test, and the paint, plating layer, corrosion products, etc. were removed using remover or hydrochloric acid, and then the corrosion depth of the base steel plate was measured. Evaluation was performed according to the following evaluation criteria. A score of A and a score of B were regarded as passing.
  • A The erosion depth is 0 mm for both the first member and the second member.
  • B Among the erosion depths of the first member and the second member, the larger one is more than 0 mm and less than 0.2 mm.
  • C Among the erosion depths of the first member and the second member, the larger one is more than 0 mm and less than 0.2 mm. , the erosion depth of the larger one is 0.2 mm or more and less than 0.5 mm
  • D The erosion depth of the larger one of the respective erosion depths of the first member and the second member is 0.5 mm or more
  • a steel material that is made of a steel material with a surface treatment layer, and has an opening that penetrates the steel material and an exposed portion that is adjacent to the opening and exposes the steel base material.
  • the plating layer of the member includes, in mass %, Al: more than 15.0% and 30.0% or less, Mg: more than 5.0% and 15.0% or less, Sn: 0% to 0.70%, Ca: 0.03% to 0.60%, Si: 0.01% to 0.75%, Ti: 0% to 0.25%, Ni: 0% to 1.00%, Co: 0% to 0.25 %, Fe: 0% to 5.0%, B: 0% to 0.5%, and the remainder consists of Zn and impurities, and the first
  • the peripheral length of the opening of the member is L [mm]
  • the area of the exposed portion of the first member that is not in contact with the second member is S S [mm 2 ]
  • the area of the exposed portion of the first member that is not in contact with the second member is S S [mm 2 ]
  • the ratio R calculated based on the analysis result of the surface analysis is defined as in the following equation (1), and in the cross section, the center of the opening is set from one end of the opening as a starting point.
  • position A is a position 20 mm away from
  • position B the value of the ratio R at the position B, RB , is less than or equal to the value of the RA .
  • R B is within the range of 0.30 to 5.00.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Coating With Molten Metal (AREA)

Abstract

Le problème à résoudre par la présente invention est de prolonger la durée de vie en service d'un corps lié, qui utilise un matériau en acier qui est pourvu d'une partie d'ouverture, en améliorant davantage la résistance à la corrosion au niveau de la partie d'ouverture et de la zone environnante de celle-ci. La solution porte sur un corps lié qui, selon la présente invention, est obtenu par liaison : d'un premier élément qui est conçu à partir d'un matériau en acier ayant une couche de traitement de surface et qui a une partie d'ouverture et une partie d'exposition dans laquelle une base en acier qui est adjacente à la partie d'ouverture est exposée ; et d'un second élément qui est conçu à partir d'un matériau en acier ayant une couche de placage qui contient un composant chimique spécifique et qui est disposé de façon à recouvrir au moins la partie d'ouverture du premier élément. La longueur L de la périphérie de la partie d'ouverture, la surface SS de la partie d'exposition et la quantité d'adhérence moyenne Mm de la couche de placage satisfont une condition spécifique ; et le rapport R, qui est calculé à partir des teneurs en Mg, Al et Zn dans la totalité de la couche de placage et des teneurs en Mg, Al et Zn dans la région allant de la surface de la couche de placage à la profondeur de 3 µm, satisfait une condition spécifique.
PCT/JP2023/001511 2022-04-28 2023-01-19 Corps lié WO2023210072A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023531120A JP7332978B1 (ja) 2022-04-28 2023-01-19 接合体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-074577 2022-04-28
JP2022074577 2022-04-28

Publications (1)

Publication Number Publication Date
WO2023210072A1 true WO2023210072A1 (fr) 2023-11-02

Family

ID=88518292

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/001511 WO2023210072A1 (fr) 2022-04-28 2023-01-19 Corps lié

Country Status (1)

Country Link
WO (1) WO2023210072A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0564860A (ja) * 1991-09-06 1993-03-19 Kobe Steel Ltd 樹脂複合型鋼板
JP2016124029A (ja) * 2015-01-08 2016-07-11 新日鐵住金株式会社 ホットスタンプ用重ね合わせブランクと、重ね合わせホットスタンプ成形体の製造方法、および重ね合わせホットスタンプ成形体
WO2018079131A1 (fr) * 2016-10-28 2018-05-03 日新製鋼株式会社 Élément soudé et son procédé de fabrication
KR20210069457A (ko) * 2019-12-03 2021-06-11 주식회사 포스코 내식성이 우수한 접합강판 및 이의 제조방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0564860A (ja) * 1991-09-06 1993-03-19 Kobe Steel Ltd 樹脂複合型鋼板
JP2016124029A (ja) * 2015-01-08 2016-07-11 新日鐵住金株式会社 ホットスタンプ用重ね合わせブランクと、重ね合わせホットスタンプ成形体の製造方法、および重ね合わせホットスタンプ成形体
WO2018079131A1 (fr) * 2016-10-28 2018-05-03 日新製鋼株式会社 Élément soudé et son procédé de fabrication
KR20210069457A (ko) * 2019-12-03 2021-06-11 주식회사 포스코 내식성이 우수한 접합강판 및 이의 제조방법

Also Published As

Publication number Publication date
TW202342220A (zh) 2023-11-01

Similar Documents

Publication Publication Date Title
CN110234780B (zh) 镀覆钢材
KR102516012B1 (ko) 도금 강판
JP6059408B1 (ja) 溶融Ａｌ−Ｚｎ−Ｍｇ−Ｓｉめっき鋼板とその製造方法
JP6687175B1 (ja) めっき鋼材
JP6394843B1 (ja) めっき鋼板
KR101368990B1 (ko) 내식성이 우수한 용융 Ｚｎ-Ａｌ-Ｍｇ-Ｓｉ-Ｃｒ 합금 도금 강재
JP6428975B1 (ja) めっき鋼板
WO2012070694A1 (fr) TÔLE EN ACIER PLAQUÉE PAR IMMERSION À CHAUD À BASE D'Al-Zn ET SON PROCÉDÉ DE FABRICATION
JP2021004403A (ja) めっき鋼材、およびめっき鋼材の製造方法
KR20230110634A (ko) 용접 조인트 및 자동차 부품
WO2020213680A1 (fr) Matériau en acier plaqué
WO2023210072A1 (fr) Corps lié
JP2002047549A (ja) 高耐食性めっき鋼材およびその製造方法
JP7332978B1 (ja) 接合体
JP6315153B1 (ja) 溶融Ａｌ−Ｚｎ系めっき鋼板
JP2002047521A (ja) 高耐食性めっき鋼材およびその製造方法
WO2022153694A1 (fr) Matériau d'acier plaqué
WO2022107837A1 (fr) Matériau d'acier plaqué
TWI842360B (zh) 接合體
KR100667140B1 (ko) 내식성 및 가공성이 우수한 용융 Ｓｎ-Ｚｎ계 도금 강판
WO2023163075A1 (fr) Matériau d'acier plaqué
WO2023145822A1 (fr) Tôle d'acier plaquée
JP7328608B1 (ja) 溶接継手
JP2023111556A (ja) 溶接継手
KR20230070071A (ko) 도금 강재

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2023531120

Country of ref document: JP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23795821

Country of ref document: EP

Kind code of ref document: A1