WO2022044193A1 - Tôle d'acier traitée en surface, procédé de fabrication de tôle d'acier traitée en surface et procédé de façonnage pour tôle d'acier traitée en surface - Google Patents

Tôle d'acier traitée en surface, procédé de fabrication de tôle d'acier traitée en surface et procédé de façonnage pour tôle d'acier traitée en surface Download PDF

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Publication number
WO2022044193A1
WO2022044193A1 PCT/JP2020/032348 JP2020032348W WO2022044193A1 WO 2022044193 A1 WO2022044193 A1 WO 2022044193A1 JP 2020032348 W JP2020032348 W JP 2020032348W WO 2022044193 A1 WO2022044193 A1 WO 2022044193A1
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Prior art keywords
steel sheet
treated steel
treated
layer
surface treatment
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PCT/JP2020/032348
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English (en)
Japanese (ja)
Inventor
雅典 松野
颯 永山
晋 上野
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日本製鉄株式会社
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Priority to PCT/JP2020/032348 priority Critical patent/WO2022044193A1/fr
Publication of WO2022044193A1 publication Critical patent/WO2022044193A1/fr

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    • 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
    • B32B15/08—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 synthetic resin
    • 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
    • B32B15/08—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 synthetic resin
    • B32B15/082—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 synthetic resin comprising vinyl resins; comprising acrylic resins
    • 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
    • B32B15/08—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 synthetic resin
    • B32B15/085—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 synthetic resin comprising polyolefins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D201/00—Coating compositions based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/02—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using non-aqueous solutions
    • C23C22/03—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using non-aqueous solutions containing phosphorus compounds

Definitions

  • the present invention relates to a surface-treated steel sheet, a method for manufacturing a surface-treated steel sheet, and a method for processing a surface-treated steel sheet.
  • drawing processing such as deep drawing processing is known.
  • deep drawing the outer peripheral portion of the blank material is sandwiched between a drawing die having an opening and a wrinkle pressing member (blank holder), and the blank material is placed inside the opening of the drawing die by a drawing punch. It is a press working method that pushes in and processes a blank material.
  • Patent Document 1 a method of forming a lubricating film on both surfaces of a steel sheet surface is known in order to suppress damage to the surface of the steel sheet due to the rubbing.
  • steel sheets are often wound in a coil and stored. Therefore, the steel sheet is required to be less likely to be deformed or displaced while being rolled and stored. In order to prevent deformation and displacement during storage, the coefficient of static friction between the front surface and the back surface of the steel sheet may be made higher.
  • the present invention has been made in view of this point, and is a surface-treated steel sheet having high workability by drawing and having a high static friction coefficient between the front surface and the back surface of the steel sheet, a method for manufacturing the surface-treated steel sheet, and the like. And an object thereof is to provide a processing method for the surface-treated steel sheet.
  • the surface-treated steel sheet according to the embodiment of the present invention for solving the above problems is a surface-treated steel sheet having one surface and the other surface, and the one surface has a coefficient of dynamic friction ⁇ 1 of 0.1 or less.
  • the dynamic friction coefficient ⁇ 2 of the other surface is 0.2 or more, and the static friction coefficient ⁇ 3 between the one surface and the other surface is larger than 0.14.
  • the method for manufacturing a surface-treated steel sheet according to an embodiment of the present invention for solving the above-mentioned problems is the above-mentioned method for manufacturing a surface-treated steel sheet, which is a step of preparing a steel sheet having one surface and the other surface.
  • the step of applying a surface treatment liquid containing an organic lubricant to one of the above surfaces to form a surface treatment layer, and the surface treatment liquid applied to the other surface of the other surface are It has a step of applying a surface treatment liquid having a different composition.
  • the method for processing a surface-treated steel sheet according to an embodiment of the present invention for solving the above problems includes a step of preparing a blank material obtained by punching the surface-treated steel sheet into a predetermined shape, and the blank material. It has a step of bringing one surface into contact with the die and a step of pressing the other surface of the blank material toward the die side.
  • a surface-treated steel sheet having high workability by drawing and having a high static friction coefficient between the front surface and the back surface of the steel sheet a method for manufacturing the surface-treated steel sheet, and a method for processing the surface-treated steel sheet.
  • FIG. 1 is a schematic diagram illustrating a method of measuring a static friction coefficient ⁇ 3 in one embodiment of the present invention.
  • FIG. 2 is a schematic view showing a state in which deep drawing is performed using a surface-treated steel sheet according to an embodiment of the present invention.
  • FIG. 3A is a schematic view showing a state in which a surface-treated steel plate according to an embodiment of the present invention is used as a roll body, and
  • FIG. 3B is a partial layer among a plurality of layers made of the surface-treated steel plate constituting the roll body. It is an enlarged sectional view of.
  • the surface-treated steel plate is a plate-shaped steel plate, and has a plate-shaped one surface (hereinafter, also simply referred to as “front surface”) and the other surface (hereinafter, also simply referred to as “back surface”). At least one of the front surface and the back surface is surface-treated so that the dynamic friction coefficient is different.
  • the type of steel sheet that serves as the base steel sheet for the surface-treated steel sheet is not particularly limited.
  • a steel sheet made of low carbon steel, medium carbon steel, high carbon steel, alloy steel, or the like can be used as the base steel sheet.
  • a steel sheet for deep drawing made of low-carbon Ti-added steel, low-carbon Nb-added steel, or the like is preferable as the base steel sheet.
  • a high-strength steel plate to which P, Si, Mn and the like are added may be used.
  • the steel sheet may be a cold-rolled steel sheet or a hot-rolled steel sheet.
  • the steel sheet may be a steel sheet for deep drawing such as low carbon Ti-added steel and low-carbon Nb-added steel.
  • the base steel plate may have a zinc-based plating layer such as zinc plating, Zn-Al alloy plating, and Zn-Al-Mg alloy plating, or may have an aluminum-based plating layer such as aluminum plating. good.
  • the base steel sheet is a zinc-based plated layer (Zn—Al alloy plated layer and Zn—) containing 0.1% by mass or more of Al. It is preferable to have an Al—Mg alloy plating layer), and it is more preferable to have a Zn—Al—Mg alloy plating layer.
  • Dynamic friction coefficient ⁇ 1, dynamic friction coefficient ⁇ 2, and static friction coefficient ⁇ 3 The surface-treated steel sheet satisfies the following conditions (1) to (3) by the surface-treated layer formed on at least one of the front surface and the back surface.
  • the front surface has a dynamic friction coefficient ⁇ 1 of 0.1 or less.
  • the back surface has a dynamic friction coefficient ⁇ 2 of 0.2 or more.
  • the static friction coefficient ⁇ 3 between the front surface and the back surface is 0.14. Greater than
  • the drawing die 222 has an opening 222a in the center in the plane direction (direction parallel to the plane on which the front surface 212 and the back surface 214 of the blank material 210 extend), and the wrinkle pressing member 224 is drawn in the center in the plane direction. It has an opening 224a having substantially the same shape as the opening 222a of the die 222.
  • the drawing die 222 and the wrinkle pressing member 224 are arranged so that the positions of the openings 222a and the openings 224a coincide with each other in the vertical direction (direction orthogonal to the plane on which the front surface 212 and the back surface 214 of the blank material 210 extend). Placed in.
  • the drawing punch 226 is inserted from the opening 224a of the wrinkle pressing member 224 and brought into contact with the back surface 214 of the blank material 210. Further, when the drawing punch 226 is pressed toward the surface 212 side of the blank material 210, the blank material 210 is pushed into the inside of the opening 222a of the drawing die 222 and flows in, and the shape of the opening 222a. Is processed into.
  • the region 212b in contact with the drawing die 222 is slippery with respect to the drawing die 222, and the region 212b is from the peripheral portion to the opening 222a. It is easy to flow into the inside. Further, since the back surface 214 of the blank material 210 has low lubrication, the region 214b in contact with the drawing punch 226 is less likely to slip with respect to the drawing punch 226, and the region 214b moves toward the outside of the opening 222a. It is hard to leak.
  • the dynamic friction coefficient ⁇ 1 on the front surface of the surface-treated steel sheet is 0.1 or less
  • the dynamic friction coefficient ⁇ 2 on the back surface of the surface-treated steel sheet is 0.2 or more.
  • the surface dynamic friction coefficient ⁇ 1 is preferably 0.04 or more and 0.08 or less, and more preferably 0.04 or more and 0.06 or less.
  • the dynamic friction coefficient ⁇ 2 on the back surface is preferably 0.2 or more and 0.5 or less, and more preferably 0.3 or more and 0.4 or less.
  • FIG. 3A is a schematic view showing a state in which the surface-treated steel plate according to the present embodiment is a roll body
  • FIG. 3B is a partial layer (FIG. 3A) among a plurality of layers of the surface-treated steel plate constituting the roll body. It is an enlarged cross-sectional view of the area (the region shown by "3B") in the middle.
  • the surface-treated layer is formed on at least one of the front surface and the back surface of the surface-treated steel plate so that the front surface and the back surface of the surface-treated steel plate satisfy the above-mentioned dynamic friction coefficient ⁇ 1, dynamic friction coefficient ⁇ 2, and static friction coefficient ⁇ 3. It suffices if it is formed on the surface of.
  • the organic lubricant is not particularly limited, but from the viewpoint of further enhancing the lubricity, a fluororesin, a polyolefin resin, or a styrene resin is preferable, a polyolefin resin is more preferable, and a polyethylene resin is further preferable.
  • the Group 4 metals include Ti, Zr and Hf.
  • the above-mentioned group 4 metal oxyate salt is a salt of an inorganic acid containing a group 4 metal atom and an oxygen atom.
  • the above salts include hydrides, ammonium salts, alkali metal salts, alkaline earth metal salts and the like.
  • the oxygen acid salt of the Group 4 metal is preferably an ammonium salt of an inorganic acid containing a Group 4 metal atom and an oxygen atom, and is zirconium ammonium carbonate. Is preferable.
  • the amount of the oxygen acid salt of the Group 4 metal adhered is in terms of Group 4 atoms. It is preferably 3 mg / m 2 or more, more preferably 4 mg / m 2 or more and 140 mg / m 2 or less, and further preferably 4 mg / m 2 or more and 100 mg / m 2 or less.
  • the surface treatment layer contains an organic resin described later, it is more preferable that the amount of the oxychloride of the Group 4 metal adhered is 4 mg / m 2 or more and 20 mg / m 2 or less in terms of Group 4 atoms.
  • the amount of the oxychloride of the Group 4 metal adhered is 30 mg / m 2 or more and 140 mg / m 2 or less in terms of Group 4 atoms.
  • the adhered amount of the phosphoric acid compound is the phosphorus atom. In terms of conversion, it is preferably 1 mol times or more and 2 mol times or less, and 1.5 mol times or more and 1.7 mol times or less, the amount of metal atoms attached to the oxyacid acid salt of the above group 4 metal. More preferred.
  • the surface treatment layer may be an organic surface treatment layer containing an organic resin.
  • the organic resin may be any organic resin usually used for surface treatment of steel sheets, and can be appropriately selected from, for example, urethane resin, fluororesin, acrylic resin, polyester resin and the like.
  • the surface treatment layer containing these organic resins can enhance the corrosion resistance and processability of the coated steel sheet.
  • the organic resin is preferably a urethane resin or a polyester resin, and more preferably a urethane resin.
  • the urethane resin usually has a structural unit derived from an isocyanate compound and a structural unit derived from a polyol compound.
  • Examples of the structural unit derived from the isocyanate compound include a structural unit derived from an aliphatic diisocyanate and a structural unit derived from an alicyclic diisocyanate.
  • Examples of the aliphatic diisocyanate include phenylenediocyanate, tolylene diisocyanate, diphenylmethane diisocyanate and naphthalene diisocyanate.
  • Examples of the alicyclic diisocyanate include cyclohexane diisocyanate, isophorone diisocyanate, norbornane diisocyanate, xylylene diisocyanate and tetramethylxylylene diisocyanate.
  • Examples of the structural unit derived from the above-mentioned polyol compound include a structural unit derived from a polyolefin polyol.
  • Examples of the polyolefin polyols include polyester polyols, polyether polyols, polycarbonate polyols, polyacetal polyols, polyacrylate polyols and polybutadiene polyols.
  • the surface treatment layer is one or more kinds of compounds selected from the group consisting of an oxide of a valve metal, a hydroxide of a valve metal, or a fluoride of a valve metal (hereinafter, also simply referred to as "valve metal compound").
  • valve metal compound a compound selected from the group consisting of an oxide of a valve metal, a hydroxide of a valve metal, or a fluoride of a valve metal (hereinafter, also simply referred to as "valve metal compound”).
  • valve metal compound a fluoride of a valve metal
  • Etc. may be included.
  • the valve metal compound can impart an excellent barrier action to the surface treatment layer while reducing the environmental load.
  • the valve metal is a metal whose oxide exhibits high insulation resistance. Examples of the valve metal include one kind or two or more kinds of metals selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo and W. A known valve metal compound may be used.
  • the amount of the organic resin adhered is not particularly limited as long as it does not have a significant effect on the workability of the drawing process and the storage property in the form of a roll, but is 1,000 mg / m 2 or more and 3,000 mg / m 2 or less. It is preferably 200 mg / m 2 or more and 1,000 mg / m 2 or less.
  • soluble fluoride of valve metal in the surface treatment layer, it is possible to impart a self-repairing action to the surface treatment layer.
  • Fluoride of the valve metal dissolves in the moisture in the atmosphere and then reprecipitates as a sparingly soluble oxide or hydroxide on the surface of the plated steel sheet exposed from the film defect part, and the film defect part is formed. Can be filled.
  • the surface-treated steel sheet may or may not have the surface-treated layer on the back surface side.
  • the corrosion resistance of the back surface side can be further enhanced.
  • the surface treatment layer formed on the back surface side may or may not contain the organic lubricant, but the dynamic friction coefficient ⁇ 2 on the back surface side is lowered.
  • the surface treatment layer formed on the back surface side does not contain the organic lubricant from the viewpoint of suppressing the decrease in the static friction coefficient ⁇ 3 between the front surface and the back surface. Is preferable.
  • the amount of the organic lubricant contained in the surface treatment liquid can be 3% by mass or more and 30% by mass or less, and 4% by mass or more and 20% by mass or less with respect to the total mass of the surface treatment liquid. Is preferable.
  • the surface treatment layer can be formed by applying the above-mentioned surface treatment liquid to at least one of the front surface and the back surface of the steel sheet and drying it by a known method. At this time, the surface treatment layer may or may not be formed on the back surface by applying the surface treatment liquid.
  • the surface treatment liquid applied to the front surface side and the surface treatment liquid applied to the back surface side are the above-mentioned dynamic friction coefficient ⁇ 1, dynamic friction coefficient ⁇ 2, and static friction coefficient. It may be adjusted so that the condition of ⁇ 3 is satisfied, and it is particularly preferable that the content of the organic lubricant is different.
  • the blank material may be such that the surface-treated steel plate described above is punched into a predetermined shape such as a circle.
  • the shape of the die and the pressing of the other surface can be determined according to the shape of the processed product to be manufactured by various processing such as drawing processing, overhanging processing, flange processing, bending processing, and the like. Of these, in the present embodiment, deep drawing is preferable because the steel sheet is less likely to break at the shoulder portion in contact with the punch.
  • the ratio of the molar concentration of the metal atom (Zr) derived from the Group 4 metal oxychloride to the molar concentration of the phosphorus atom of the phosphoric acid compound in the surface treatment liquid 1 (molar concentration of the phosphorus atom / molar concentration of the Group 4 metal). Concentration) is 1.7.
  • the surface treatment liquid 2 was prepared in the same manner as the preparation of the surface treatment liquid 1 except that the amount of the polyethylene-based lubricant added was 10.0% by mass with respect to the total mass of the solid content in the base treatment liquid.
  • the surface treatment liquid 5 was prepared in the same manner as the preparation of the surface treatment liquid 4 except that the amount of the polyethylene-based lubricant added was 10.0% by mass with respect to the total mass of the solid content in the base treatment liquid.
  • the surface treatment liquid 6 was prepared in the same manner as the preparation of the surface treatment liquid 4 except that the amount of the polyethylene-based lubricant added was 5.0% by mass with respect to the total mass of the solid content in the base treatment liquid.
  • Ti oxyacid salt titanium fluoride ammonium fluoride (Ti oxyacid salt) in which the amount of Group 4 metal added is 10.0 g / L in terms of metal atom, and phosphoric acid in which the amount of group 4 metal added is 12.0 g / L in terms of phosphorus atom.
  • the base treatment liquid to be used was prepared and used as the surface treatment liquid 7.
  • the surface treatment liquid 9 was prepared in the same manner as the preparation of the surface treatment liquid 1 except that the polyethylene-based lubricant was not added.
  • the surface treatment liquid 11 was prepared in the same manner as the preparation of the surface treatment liquid 10 except that the oxygen salt of the Group 4 metal was not added.
  • the surface treatment liquid 12 was prepared in the same manner as the preparation of the surface treatment liquid 5 except that the phosphoric acid compound was not added.
  • the surface treatment liquid 13 was prepared in the same manner as the preparation of the surface treatment liquid 5 except that the oxygen salt of the Group 4 metal was not added and the phosphoric acid compound was not added.
  • Table 2 shows the types of plated steel sheets used for producing the surface-treated steel sheets 1 to 27, the types of surface-treated liquids, and their film thicknesses.
  • the test sample 110 for pulling out was pulled in the vertical direction at a speed of 100 mm / min, and the force applied immediately after the pulling out to pull out the test sample 110 for pulling out was measured. Then, the force for pulling out the test sample 110 for pulling out is divided by the load (600 kgf) of pressing the test sample 120a for holding and the test sample 120b for holding against the test sample 110 for pulling, and static friction is applied.
  • the coefficient ⁇ 3 was obtained. Based on the obtained values of the static friction coefficient, the surface-treated steel sheets 1 to 27 were evaluated according to the following criteria. ⁇ Static friction coefficient ⁇ 3 is larger than 0.14 ⁇ Static friction coefficient ⁇ 3 is 0.14 or less
  • Table 3 shows the evaluation results of the surface-treated steel sheets 1 to 27.
  • 24-The surface-treated steel plate 27 had good workability in deep drawing. Further, the surface-treated steel sheet 1 to the surface-treated steel sheet 14, the surface-treated steel sheet 19 to the surface-treated steel sheet 22, and the surface-treated steel sheet 24 to the surface-treated steel sheet 27 have a static friction coefficient ⁇ 3 between the front surface and the back surface larger than 0.14. The coil storage was also high.
  • the surface-treated steel sheet of the present invention is less likely to cause scale when processed by hot stamping. Therefore, it is possible to shorten or eliminate the process such as scale removal and to process the steel sheet by hot stamping more easily and inexpensively. Therefore, the surface-treated steel sheet of the present invention is expected to contribute to the further spread of processing of steel sheets by hot stamping.

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  • Materials Engineering (AREA)
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  • Wood Science & Technology (AREA)
  • General Chemical & Material Sciences (AREA)
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Abstract

La présente invention a pour objet de fournir un acier traité en surface qui a une aptitude au façonnage élevée par emboutissage profond, et à partir duquel est obtenue une tôle d'acier ayant un coefficient de frottement statique élevé entre la surface avant et la surface arrière. Plus particulièrement, l'invention concerne une tôle d'acier traitée en surface. La tôle d'acier traitée en surface comporte une première surface et une autre surface. La première surface présente un coefficient de frottement dynamique mu 1 inférieur ou égal à 0,1. L'autre surface présente un coefficient de frottement dynamique mu 2 supérieur ou égal à 0,2. Un coefficient de frottement statique mu 3 entre la première surface et l'autre surface est supérieur ou égal à 0,14.
PCT/JP2020/032348 2020-08-27 2020-08-27 Tôle d'acier traitée en surface, procédé de fabrication de tôle d'acier traitée en surface et procédé de façonnage pour tôle d'acier traitée en surface WO2022044193A1 (fr)

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PCT/JP2020/032348 WO2022044193A1 (fr) 2020-08-27 2020-08-27 Tôle d'acier traitée en surface, procédé de fabrication de tôle d'acier traitée en surface et procédé de façonnage pour tôle d'acier traitée en surface

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PCT/JP2020/032348 WO2022044193A1 (fr) 2020-08-27 2020-08-27 Tôle d'acier traitée en surface, procédé de fabrication de tôle d'acier traitée en surface et procédé de façonnage pour tôle d'acier traitée en surface

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10202324A (ja) * 1997-01-21 1998-08-04 Nisshin Steel Co Ltd プレス加工用塗装鋼板および塗装鋼板のプレス加工法
JPH1157611A (ja) * 1997-08-11 1999-03-02 Kobe Steel Ltd プレス加工性に優れた被覆鋼板および潤滑樹脂組成物
JPH11268177A (ja) * 1998-03-24 1999-10-05 Nkk Corp 有機複合被覆鋼板
WO2007144951A1 (fr) * 2006-06-15 2007-12-21 Nippon Steel Corporation Feuille d'acier revêtue
JP2020007606A (ja) * 2018-07-06 2020-01-16 日本製鉄株式会社 表面処理鋼板及び表面処理鋼板の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10202324A (ja) * 1997-01-21 1998-08-04 Nisshin Steel Co Ltd プレス加工用塗装鋼板および塗装鋼板のプレス加工法
JPH1157611A (ja) * 1997-08-11 1999-03-02 Kobe Steel Ltd プレス加工性に優れた被覆鋼板および潤滑樹脂組成物
JPH11268177A (ja) * 1998-03-24 1999-10-05 Nkk Corp 有機複合被覆鋼板
WO2007144951A1 (fr) * 2006-06-15 2007-12-21 Nippon Steel Corporation Feuille d'acier revêtue
JP2020007606A (ja) * 2018-07-06 2020-01-16 日本製鉄株式会社 表面処理鋼板及び表面処理鋼板の製造方法

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