WO2022044193A1 - Surface treated steel sheet, manufacturing method for surface treated steel sheet, and working method for surface treated steel sheet - Google Patents

Surface treated steel sheet, manufacturing method for surface treated steel sheet, and working method for surface treated steel sheet 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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steel sheet
treated steel
treated
layer
surface treatment
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PCT/JP2020/032348
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French (fr)
Japanese (ja)
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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/en
Publication of WO2022044193A1 publication Critical patent/WO2022044193A1/en

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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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Abstract

The purpose of the present invention is to provide a surface treated steel which has high workability with deep drawing, and from which a steel sheet having a high coefficient of static friction between the front surface and the back surface is obtained. The present invention for achieving the above purpose relates to a surface treated steel sheet. The surface treated steel sheet has one surface and another surface. The one surface has a dynamic friction coefficient μ1 of 0.1 or less. The other surface has a dynamic friction coefficient μ2 of 0.2 or greater. A static friction coefficient μ3 between the one surface and the other surface is 0.14 or greater.

Description

表面処理鋼板、表面処理鋼板の製造方法、および表面処理鋼板の加工方法Manufacturing method of surface-treated steel sheet, surface-treated steel sheet, and processing method of surface-treated steel sheet
　本発明は、表面処理鋼板、表面処理鋼板の製造方法、および表面処理鋼板の加工方法に関する。 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.
　鋼板を円板状に打ち抜いてなるブランク材から有底円筒形状の加工品を製造する方法として、深絞り加工などの絞り加工が知られている。深絞り加工とは、ブランク材の外周部を、開口部を有する絞り用ダイと皺押さえ部材（ブランクホルダ）とで挟持し、絞り用パンチによってブランク材を絞り用ダイスの上記開口部の内部に押し込み、ブランク材を加工するプレス加工方法である。 As a method of manufacturing a bottomed cylindrical processed product from a blank material obtained by punching a steel plate into a disk shape, drawing processing such as deep drawing processing is known. In 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.
　深絞り加工では、鋼板の表面が加工時に高い圧力を受けることにより、一方の面が絞り用パンチとの間で擦動し、かつ他方の面が絞り用ダイとの間で擦動する。そのため、特許文献１に記載のように、上記擦動による当該鋼板の表面の損傷を抑制するため、潤滑皮膜を鋼板表面の両面に形成する方法が知られている。 In deep drawing, the surface of the steel sheet receives high pressure during processing, so that one surface rubs with the drawing punch and the other side rubs with the drawing die. Therefore, as described in 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.
特開２０１７－１０５９８６号公報Japanese Unexamined Patent Publication No. 2017-105986
　特許文献１に記載のように鋼板の両面に潤滑皮膜を形成することによって、深絞り加工などの絞り加工時の鋼板の加工性はより高まると期待される。しかし、本発明者らの知見によると、鋼板の両面に潤滑皮膜を形成しても、たとえば深絞り加工時にパンチと接触する肩部で鋼板の破断を十分には抑制しきれていないなど、絞り加工による鋼板の加工性が十分に高まったとはいえなかった。 By forming a lubricating film on both sides of the steel sheet as described in Patent Document 1, it is expected that the workability of the steel sheet during drawing such as deep drawing will be further improved. However, according to the findings of the present inventors, even if a lubricating film is formed on both sides of the steel plate, for example, the shoulder portion that comes into contact with the punch during deep drawing does not sufficiently suppress the breakage of the steel plate. It could not be said that the workability of the steel plate by processing was sufficiently improved.
　また、鋼板には、コイル状に巻いて保管されることが多い。そのため、鋼板には、巻かれて保管されている間に変形やずれが生じにくいことが求められる。上記保管中の変形やずれを生じにくくするためには、鋼板の表面と裏面との間の静摩擦係数をより高くすればよい。 In addition, 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.
　本発明は、かかる点に鑑みてなされたものであり、絞り加工による加工性が高く、かつ、鋼板の表面と裏面との間の静摩擦係数も高い表面処理鋼板、当該表面処理鋼板の製造方法、および当該表面処理鋼板の加工方法を提供することをその目的とする。 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.
　上記課題を解決するための本発明の一実施形態に関する表面処理鋼板は、一方の面と他方の面とを有する表面処理鋼板であって、上記一方の面は、動摩擦係数μ１が０．１以下であり、上記他方の面は、動摩擦係数μ２が０．２以上であり、かつ、上記一方の面と上記他方の面との間の静摩擦係数μ３は、０．１４より大きい。 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 μ1 of 0.1 or less. The dynamic friction coefficient μ2 of the other surface is 0.2 or more, and the static friction coefficient μ3 between the one surface and the other surface is larger than 0.14.
　また、上記課題を解決するための本発明の一実施形態に関する表面処理鋼板の製造方法は、上記表面処理鋼板の製造方法であって、一方の面と他方の面とを有する鋼板を用意する工程と、上記一方の面に、有機系潤滑剤を含む表面処理液を付与して、表面処理層を形成する工程と、上記他方の面に、上記一方の面に付与した上記表面処理液とは組成が異なる表面処理液を付与する工程と、を有する。 Further, 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.
　また、上記課題を解決するための本発明の一実施形態に関する表面処理鋼板の加工方法は、上記表面処理鋼板が所定の形状に打ち抜かれてなるブランク材を用意する工程と、上記ブランク材が有する上記一方の面を、ダイに接触させる工程と、上記ブランク材が有する上記他方の面を、上記ダイ側に押圧する工程と、を有する。 Further, 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.
　本発明によれば、絞り加工による加工性が高く、かつ、鋼板の表面と裏面との間の静摩擦係数も高い表面処理鋼板、当該表面処理鋼板の製造方法、および当該表面処理鋼板の加工方法が提供される。 According to the present invention, there are 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. Provided.
図１は、本発明の一実施形態において静摩擦係数μ３を測定する方法を説明する模式図である。FIG. 1 is a schematic diagram illustrating a method of measuring a static friction coefficient μ3 in one embodiment of the present invention. 図２は、本発明の一実施形態に関する表面処理鋼板を用いて深絞り加工を行う様子を示す模式図である。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. 図３Ａは、本発明の一実施形態に関する表面処理鋼板をロール体とした様子を示す模式図であり、図３Ｂは、上記ロール体を構成する表面処理鋼板による複数の層のうち一部の層の拡大断面図である。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.
　１．表面処理鋼板
　本発明の一実施形態は、表面処理鋼板に関する。上記表面処理鋼板は、板状の鋼板であり、上記板状の一方の面（以下、単に「表面」ともいう。）と、他方の面（以下、単に「裏面」ともいう。）と、の動摩擦係数が異なるように、表面および裏面の少なくとも一方が表面処理されている。 1. 1. Surface-treated steel sheet One embodiment of the present invention relates to a surface-treated steel sheet. 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.
　１－１．鋼板
　上記表面処理鋼板の基材鋼板となる鋼板の種類は、特に限定されない。たとえば、基材鋼板としては、低炭素鋼や中炭素鋼、高炭素鋼、合金鋼などからなる鋼板を使用することができる。良好なプレス成形性が必要とされる場合は、低炭素Ｔｉ添加鋼、低炭素Ｎｂ添加鋼などからなる深絞り用鋼板が基材鋼板として好ましい。また、Ｐ、Ｓｉ、Ｍｎなどを添加した高強度鋼板を用いてもよい。また、上記鋼板は、冷延鋼板であってもよいし、熱延鋼板であってもよい。また、上記鋼板は、低炭素Ｔｉ添加鋼および低炭素Ｎｂ添加鋼などの深絞り用鋼板であってもよい。 1-1. Steel Sheet The type of steel sheet that serves as the base steel sheet for the surface-treated steel sheet is not particularly limited. For example, as the base steel sheet, a steel sheet made of low carbon steel, medium carbon steel, high carbon steel, alloy steel, or the like can be used. When good press formability is required, 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. Further, a high-strength steel plate to which P, Si, Mn and the like are added may be used. Further, the steel sheet may be a cold-rolled steel sheet or a hot-rolled steel sheet. Further, the steel sheet may be a steel sheet for deep drawing such as low carbon Ti-added steel and low-carbon Nb-added steel.
　上記基材鋼板は、亜鉛めっき、Ｚｎ－Ａｌ合金めっき、およびＺｎ－Ａｌ－Ｍｇ合金めっきなどの亜鉛系めっき層を有してもよいし、アルミニウムめっきなどのアルミニウム系めっき層を有してもよい。これらのうち、表面処理鋼板およびその加工品の耐食性を高める観点からは、上記基材鋼板は、０．１質量％以上のＡｌを含有する亜鉛系めっき層（Ｚｎ－Ａｌ合金めっき層およびＺｎ－Ａｌ－Ｍｇ合金めっき層）を有することが好ましく、Ｚｎ－Ａｌ－Ｍｇ合金めっき層を有することがより好ましい。 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. Of these, from the viewpoint of enhancing the corrosion resistance of the surface-treated steel sheet and its processed products, 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.
　１－２．表面処理層
　上記表面処理鋼板は、表面および裏面の少なくとも一方の面に、表面処理層を有する。上記表面処理層は、後述する動摩擦係数および静摩擦係数の条件が満たされる限りにおいて、表面および裏面の一方の面のみに形成されていてもよいが、表面および裏面の両方の面に形成されていることが好ましい。上記両方の面に形成されているとき、上記表面処理層は、表面側と裏面側で組成または膜厚が異なることが好ましい。 1-2. Surface-treated layer The surface-treated steel sheet has a surface-treated layer on at least one of the front surface and the back surface. The surface treatment layer may be formed on only one surface of the front surface and the back surface as long as the conditions of the dynamic friction coefficient and the static friction coefficient described later are satisfied, but it is formed on both the front surface and the back surface. Is preferable. When formed on both of the above surfaces, it is preferable that the surface treatment layer has a different composition or film thickness on the front surface side and the back surface side.
　１－２－１．動摩擦係数μ１、動摩擦係数μ２、および静摩擦係数μ３
　上記表面および裏面の少なくとも一方の面に形成された表面処理層により、上記表面処理鋼板は、以下の条件（１）～（３）を満たす。
　（１）表面は、動摩擦係数μ１が０．１以下である
　（２）裏面は、動摩擦係数μ２が０．２以上である
　（３）表面と裏面との間の静摩擦係数μ３は、０．１４より大きい 1-2-1. Dynamic friction coefficient μ1, dynamic friction coefficient μ2, and static friction coefficient μ3
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.
(1) The front surface has a dynamic friction coefficient μ1 of 0.1 or less. (2) The back surface has a dynamic friction coefficient μ2 of 0.2 or more. (3) The static friction coefficient μ3 between the front surface and the back surface is 0.14. Greater than
　上記表面の動摩擦係数μ１および裏面の動摩擦係数μ２は、ＪＩＳ Ｋ ７１２５（１９９９年）に準じて測定して得られた値とすることができる。 The dynamic friction coefficient μ1 on the front surface and the dynamic friction coefficient μ 2 on the back surface can be values obtained by measuring according to JIS K7125 (1999).
　上記表面と裏面との間の静摩擦係数μ３は、同一の上記表面処理鋼板について、表面と裏面とが接触した状態から、上記接触している表面および裏面が接触しながら滑るように運動するときに働く抵抗である。 The coefficient of static friction μ3 between the front surface and the back surface is the static friction coefficient μ3 when the same surface-treated steel sheet is moved so as to slide while the front surface and the back surface are in contact with each other from the state where the front surface and the back surface are in contact with each other. It is a working resistance.
　上記静摩擦係数μ３は、図１に示す方法で測定した値とすることができる。具体的には、表面処理鋼板から、幅３０ｍｍ×長さ３００ｍｍの引き抜き用供試サンプル１１０と、幅３０ｍｍ×長さ４０ｍｍの２つの押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂと、を切り出す。押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂは、それぞれ、両面テープ１３０ａおよび両面テープ１３０ｂによって取付金型１４０ａおよび取付金型１４０ｂに接着させる。 The static friction coefficient μ3 can be a value measured by the method shown in FIG. Specifically, from the surface-treated steel sheet, a drawing test sample 110 having a width of 30 mm and a length of 300 mm, two holding test samples 120a having a width of 30 mm and a length of 40 mm, and a holding test sample 120b are obtained. break the ice. The holding test sample 120a and the holding test sample 120b are adhered to the mounting die 140a and the mounting die 140b by the double-sided tape 130a and the double-sided tape 130b, respectively.
　その後、引き抜き用供試サンプル１１０の表面に押さえ用供試サンプル１２０ａの裏面が、引き抜き用供試サンプル１１０の裏面に押さえ用供試サンプル１２０ｂの表面が、それぞれ接触するように、同一水平面上に対向して配置した押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂの間に引き抜き用供試サンプル１１０を配置する。さらに、引き抜き用供試サンプル１１０の両側から押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂを押し当て、取付金型１４０ａおよび取付金型１４０ｂを介して、押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂを引き抜き用供試サンプル１１０側に６００ｋｇｆの荷重で押圧する。 After that, the back surface of the test sample 120a for pressing is in contact with the front surface of the test sample 110 for extraction, and the front surface of the test sample 120b for pressing is in contact with the back surface of the test sample 110 for extraction. The extraction test sample 110 is placed between the holding test sample 120a and the holding test sample 120b arranged so as to face each other. Further, the pressing test sample 120a and the pressing test sample 120b are pressed from both sides of the drawing test sample 110, and the pressing test sample 120a and the pressing test sample 120a are pressed through the mounting die 140a and the mounting die 140b. The test sample 120b is pressed against the test sample 110 for extraction with a load of 600 kgf.
　この状態で、引き抜き用供試サンプル１１０を垂直方向に１００ｍｍ／ｍｉｎの速度で引き抜き、引き抜き直後に印加されていた、引き抜き用供試サンプル１１０を引き抜くための力を測定する。そして、上記引き抜き用供試サンプル１１０を引き抜くための力を、押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂを引き抜き用供試サンプル１１０側に押圧した荷重（６００ｋｇｆ）で除算して、得られた値を静摩擦係数μ３とすることができる。 In this state, the test sample 110 for pulling out is pulled out at a speed of 100 mm / min in the vertical direction, and the force for pulling out the test sample 110 for pulling out, which was applied immediately after the pulling out, is measured. Then, the force for pulling out the test sample 110 for pulling out is divided by the load (600 kgf) obtained by pressing the test sample 120a for holding and the test sample 120b for holding against the test sample 110 for pulling. The obtained value can be set to the static friction coefficient μ3.
　図２は、本実施形態に関する表面処理鋼板を用いて深絞り加工を行う様子を示す模式図である。 FIG. 2 is a schematic view showing a state in which deep drawing is performed using the surface-treated steel plate according to the present embodiment.
　上記表面処理鋼板が円形などの所定の形状に打ち抜かれてなるブランク材２１０は、動摩擦係数μ１が０．１以下であり高潤滑である表面２１２と、動摩擦係数μ２が０．２以下であり低潤滑である裏面２１４と、を有する。表面２１２および裏面２１４は、鋼板２１６の両面である。深絞り用金型２２０において、ブランク材２１０は、表面２１２が絞り用ダイ２２２と接触するように配置され、裏面２１４が皺押さえ部材２２４によって絞り用ダイ２２２側に押圧されることにより、絞り用ダイ２２２に対して固定される。 The blank material 210 obtained by punching the surface-treated steel sheet into a predetermined shape such as a circle has a surface 212 having a dynamic friction coefficient μ1 of 0.1 or less and high lubrication, and a low dynamic friction coefficient μ2 of 0.2 or less. It has a back surface 214 that is lubricated. The front surface 212 and the back surface 214 are both sides of the steel plate 216. In the deep drawing die 220, the blank material 210 is arranged so that the front surface 212 is in contact with the drawing die 222, and the back surface 214 is pressed toward the drawing die 222 by the wrinkle pressing member 224 for drawing. It is fixed to the die 222.
　絞り用ダイ２２２は、平面方向（ブランク材２１０の表面２１２および裏面２１４が延在する平面に平行な方向）における中央に開口部２２２ａを有し、皺押さえ部材２２４は、平面方向における中央に絞り用ダイ２２２の開口部２２２ａと略同一形状の開口部２２４ａを有する。絞り用ダイ２２２と皺押さえ部材２２４とは、これらの開口部２２２ａおよび開口部２２４ａの位置が垂直方向（ブランク材２１０の表面２１２および裏面２１４が延在する平面に直交する方向）に一致するように配置される。 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.
　この状態で、皺押さえ部材２２４の開口部２２４ａから絞り用パンチ２２６を挿入し、ブランク材２１０の裏面２１４に接触させる。さらに、絞り用パンチ２２６をブランク材２１０の表面２１２側に押圧していくと、ブランク材２１０は絞り用ダイ２２２の開口部２２２ａの内部へと押し込まれて流入していき、開口部２２２ａの形状に加工される。 In this state, 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.
　このとき、ブランク材２１０は、その表面２１２が高潤滑であるため、絞り用ダイ２２２と接触している領域２１２ｂが絞り用ダイ２２２に対して滑りやすく、領域２１２ｂが周囲部から開口部２２２ａの内部へと、流入していきやすい。また、ブランク材２１０は、その裏面２１４が低潤滑であるため、絞り用パンチ２２６と接触している領域２１４ｂが絞り用パンチ２２６に対して滑りにくく、領域２１４ｂが開口部２２２ａの外側方向へと流出しにくい。そのため、ブランク材２１０からは、絞り加工時に開口部２２２ａの内部に十分に鋼板が流入し、かつ流入した鋼板が留まりやすい（逆流出しにくい）ため、十分な厚みを有する加工品を得ることができ、加工品の厚みが薄くなり強度が低くなることによる破断などの加工不良が生じにくい。 At this time, since the surface 212 of the blank material 210 is highly lubricated, 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. Therefore, from the blank material 210, a sufficiently thick steel plate flows into the inside of the opening 222a at the time of drawing, and the flowed steel plate easily stays (difficult to flow back), so that a processed product having a sufficient thickness can be obtained. , Processing defects such as breakage due to the thinning of the processed product and the low strength are unlikely to occur.
　このような観点から、本実施形態では、表面処理鋼板の表面の動摩擦係数μ１を０．１以下とし、表面処理鋼板の裏面の動摩擦係数μ２を０．２以上とする。表面の動摩擦係数μ１は、０．０４以上０．０８以下であることが好ましく、０．０４以上０．０６以下であることがより好ましい。また、裏面の動摩擦係数μ２は、０．２以上０．５以下であることが好ましく、０．３以上０．４以下であることがより好ましい。 From this point of view, in the present embodiment, the dynamic friction coefficient μ1 on the front surface of the surface-treated steel sheet is 0.1 or less, and the dynamic friction coefficient μ2 on the back surface of the surface-treated steel sheet is 0.2 or more. The surface dynamic friction coefficient μ1 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 μ2 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.
　また、表面処理鋼板は、ロール体などとして保管されることが多い。図３Ａは、本実施形態に関する表面処理鋼板をロール体とした様子を示す模式図であり、図３Ｂは、上記ロール体を構成する表面処理鋼板による複数の層のうち一部の層（図３Ａ中、「３Ｂ」で示す領域）の拡大断面図である。 In addition, surface-treated steel sheets are often stored as rolls. 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, and 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.
　図３Ａに示すように、ロール体３００は、１枚の表面処理鋼板３１０がロール状に丸められてなる。そして、図３Ｂに示すように、ロール体３００を構成する表面処理鋼板３１０は、表面３１２が隣り合う層の裏面３１４と接するように丸められている。表面３１２および裏面３１４は、鋼板３１６の両面である。なお、図３Ｂには、複数の層を有するロール状に表面処理鋼板３１０が丸められてなるロール体３００のうち、３つの表面処理鋼板３１０の層のみを示すが、表面処理鋼板３１０はさらに多くの層が形成されるように丸められてもよい。 As shown in FIG. 3A, the roll body 300 is formed by rolling one surface-treated steel plate 310 into a roll shape. Then, as shown in FIG. 3B, the surface-treated steel plate 310 constituting the roll body 300 is rounded so that the front surface 312 is in contact with the back surface 314 of the adjacent layer. The front surface 312 and the back surface 314 are both sides of the steel plate 316. Note that FIG. 3B shows only the layers of the three surface-treated steel sheets 310 among the roll bodies 300 in which the surface-treated steel sheets 310 are rolled into a roll having a plurality of layers, but the surface-treated steel sheets 310 are even more. May be rolled to form a layer of.
　このとき、表面処理鋼板３１０は、表面３１２と裏面３１４との間の静摩擦係数が０．１４より大きいため、ロール体３００において上記接触した状態となっている表面３１２と裏面３１４とは、互いに対して滑りにくい。そのため、表面処理鋼板３１０は、ロール体３００としたときに、保管中に表面処理鋼板３１０の層間で滑りが発生することによる変形やずれが生じにくい。 At this time, since the static friction coefficient between the front surface 312 and the back surface 314 of the surface-treated steel plate 310 is larger than 0.14, the front surface 312 and the back surface 314 that are in contact with each other in the roll body 300 are opposed to each other. It is not slippery. Therefore, when the surface-treated steel plate 310 is made into a roll body 300, it is unlikely to be deformed or displaced due to slippage between the layers of the surface-treated steel plate 310 during storage.
　このような観点から、本実施形態では、表面と裏面との間の静摩擦係数μ３は、０．１４より大きくする。表面と裏面との間の静摩擦係数μ３は、０．１５以上０．３以下であることが好ましく、０．１８以上０．２２以下であることがより好ましい。 From this point of view, in this embodiment, the coefficient of static friction μ3 between the front surface and the back surface is made larger than 0.14. The coefficient of static friction μ3 between the front surface and the back surface is preferably 0.15 or more and 0.3 or less, and more preferably 0.18 or more and 0.22 or less.
　１－２－２．表面処理層の組成など
　表面処理層は、表面処理鋼板の表面および裏面が上述した動摩擦係数μ１、動摩擦係数μ２、および静摩擦係数μ３の条件を満たすように、表面処理鋼板の表面および裏面の少なくとも一方の面に形成されていればよい。 1-2-2. Composition of the surface-treated layer, etc. 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 μ1, dynamic friction coefficient μ2, and static friction coefficient μ3. It suffices if it is formed on the surface of.
　表面処理層は、有機の表面処理層であってもよいし、無機の表面処理層であってもよい。いずれにおいても、有機系潤滑剤を表面処理層中に配合することにより、表面処理鋼板の表面および裏面の潤滑性を、上記動摩擦係数μ１、動摩擦係数μ２、および静摩擦係数μ３の条件が満たされるように調整することができる。特に、潤滑製をより高めることが求められる上記表面側に形成する表面処理層に、上記有機系潤滑剤を配合することが好ましい。 The surface treatment layer may be an organic surface treatment layer or an inorganic surface treatment layer. In either case, by blending the organic lubricant into the surface-treated layer, the lubricity of the front surface and the back surface of the surface-treated steel plate is satisfied with the conditions of the dynamic friction coefficient μ1, the dynamic friction coefficient μ2, and the static friction coefficient μ3. Can be adjusted to. In particular, it is preferable to add the organic lubricant to the surface treatment layer formed on the surface side, which is required to further enhance the lubrication product.
　上記有機系潤滑剤は、特に限定されないが、潤滑性をより高める観点からは、フッ素系樹脂、ポリオレフィン樹脂、またはスチレン系樹脂が好ましく、ポリオレフィン樹脂がより好ましく、ポリエチレン樹脂がさらに好ましい。 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.
　また、表面処理層は、４族金属の酸素酸塩とリン酸化合物とを含むことが好ましい。このような表面処理層は、表面処理鋼板の表面および裏面の潤滑性を調整して絞り加工による加工性およびロール状にしての保管性を高めるほか、緻密な化成処理皮膜を形成することにより表面処理鋼板の耐食性を高めることもできる。 Further, it is preferable that the surface treatment layer contains an oxygen salt of a Group 4 metal and a phosphoric acid compound. Such a surface-treated layer adjusts the lubricity of the front and back surfaces of the surface-treated steel sheet to improve the workability by drawing and the storability in roll form, and also forms a dense chemical conversion-treated film on the surface. It is also possible to improve the corrosion resistance of the treated steel sheet.
　上記４族金属には、Ｔｉ、ＺｒおよびＨｆが含まれる。上記４族金属の酸素酸塩は、４族金属原子および酸素原子を含む無機酸の塩である。上記塩の例には、水素酸塩、アンモニウム塩、アルカリ金属塩、およびアルカリ土類金属塩などが含まれる。これらのうち、塗装鋼板の耐食性をより高める観点からは、上記４族金属の酸素酸塩は、４族金属原子および酸素原子を含む無機酸のアンモニウム塩であることが好ましく、炭酸ジルコニウムアンモニウムであることが好ましい。 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. Examples of the above salts include hydrides, ammonium salts, alkali metal salts, alkaline earth metal salts and the like. Of these, from the viewpoint of further enhancing the corrosion resistance of the coated steel plate, 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.
　上記リン酸化合物は、４族金属の酸素酸塩を含む表面処理層の密着性を高めることができる。上記リン酸化合物の例には、リン酸ナトリウム、リン酸カルシウム、リン酸マンガン、およびリン酸マグネシウムなどが含まれる。 The phosphoric acid compound can enhance the adhesion of the surface treatment layer containing the oxygen salt of the Group 4 metal. Examples of the phosphoric acid compound include sodium phosphate, calcium phosphate, manganese phosphate, magnesium phosphate and the like.
　上記絞り加工による加工性およびロール状にしての保管性を維持しつつ、表面処理鋼板の耐食性を十分に高める観点からは、上記４族金属の酸素酸塩の付着量は、４族原子換算で３ｍｇ／ｍ２以上であることが好ましく、４ｍｇ／ｍ２以上１４０ｍｇ／ｍ２以下であることがより好ましく、４ｍｇ／ｍ２以上１００ｍｇ／ｍ２以下であることがさらに好ましい。なお、表面処理層が後述する有機樹脂を含むときは、上記４族金属の酸素酸塩の付着量は、４族原子換算で４ｍｇ／ｍ２以上２０ｍｇ／ｍ２以下であることがさらに好ましく、表面処理層が後述する有機樹脂を含まないときは、上記４族金属の酸素酸塩の付着量は、４族原子換算で３０ｍｇ／ｍ２以上１４０ｍｇ／ｍ２以下であることがさらに好ましい。 From the viewpoint of sufficiently improving the corrosion resistance of the surface-treated steel sheet while maintaining the workability by the drawing process and the storability in the form of a roll, 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. When 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. When the surface treatment layer does not contain the organic resin described later, it is more preferable that 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.
　また、上記４族金属の酸素酸塩の密着性を高めて、上記４族金属の酸素酸塩による耐食性の向上効果を十分に奏させる観点からは、上記リン酸化合物の付着量は、リン原子換算で、上記４族金属の酸素酸塩に由来する金属原子の付着量の１モル倍以上２モル倍以下であることが好ましく、１．５モル倍以上１．７モル倍以下であることがより好ましい。 Further, from the viewpoint of enhancing the adhesion of the oxygen acid salt of the Group 4 metal and sufficiently exerting the effect of improving the corrosion resistance of the oxygen salt of the Group 4 metal, 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.
　表面処理層は、有機樹脂を含む有機系の表面処理層であってもよい。上記有機樹脂は、鋼板の表面処理に通常使用される有機樹脂であればよく、たとえば、ウレタン樹脂、フッ素樹脂、アクリル樹脂、およびポリエステル樹脂などから、適宜選択することができる。これらの有機樹脂を含む表面処理層は、上記塗装鋼板の耐食性および加工性を高めることができる。これらのうち、耐食性および加工性をより高める観点からは、上記有機樹脂はウレタン樹脂またはポリエステル樹脂であることが好ましく、ウレタン樹脂であることがより好ましい。 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. Of these, from the viewpoint of further enhancing corrosion resistance and processability, the organic resin is preferably a urethane resin or a polyester resin, and more preferably a urethane resin.
　上記ウレタン樹脂は、通常、イソシアネート化合物に由来する構成単位およびポリオール化合物に由来する構成単位を有する。 The urethane resin usually has a structural unit derived from an isocyanate compound and a structural unit derived from a polyol compound.
　上記イソシアネート化合物に由来する構成単位の例には、脂肪族ジイソシアネートに由来する構成単位および脂環族ジイソシアネートに由来する構成単位が含まれる。上記脂肪族ジイソシアネートの例には、フェニレンジイソシアネート、トリレンジイソシアネート、ジフェニルメタンジイソシアネートおよびナフタレンジイソシアネートが含まれる。上記脂環族ジイソシアネートの例には、シクロヘキサンジイソシアネート、イソホロンジイソシアネート、ノルボルナンジイソシアネート、キシリレンジイソシアネートおよびテトラメチルキシリレンジイソシアネートが含まれる。 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.
　上記ポリオール化合物に由来する構成単位の例には、ポリオレフィンポリオールに由来する構成単位が含まれる。上記ポリオレフィンポリオールの例には、ポリエステルポリオール、ポリエーテルポリオール、ポリカーボネートポリオール、ポリアセタールポリオール、ポリアクリレートポリオールおよびポリブタジエンポリオールが含まれる。 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.
　上記表面処理層は、バルブメタルの酸化物、バルブメタルの水酸化物、またはバルブメタルのフッ化物からなる群から選ばれる１種類または２種類以上の化合物（以下、単に「バルブメタル化合物」ともいう）などを含んでもよい。バルブメタル化合物は、環境負荷を小さくしつつ、優れたバリア作用を表面処理層に付与することができる。バルブメタルとは、その酸化物が高い絶縁抵抗を示す金属をいう。バルブメタルとしては、Ｔｉ、Ｚｒ、Ｈｆ、Ｖ、Ｎｂ、Ｔａ、ＭｏおよびＷからなる群から選ばれる１種類または２種類以上の金属が挙げられる。バルブメタル化合物としては公知のものを用いてよい。 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"). ) 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.
　上記有機樹脂の付着量は、上記絞り加工による加工性およびロール状にしての保管性への顕著な影響がない限りにおいて特に限定されないものの、１，０００ｍｇ／ｍ２以上３，０００ｍｇ／ｍ２以下であることが好ましく、２００ｍｇ／ｍ２以上１，０００ｍｇ／ｍ２以下であることがより好ましい。 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.
　また、バルブメタルの可溶性フッ化物を表面処理層に含ませることで、表面処理層に自己修復作用を付与することができる。バルブメタルのフッ化物は、雰囲気中の水分に溶け出した後、皮膜欠陥部から露出しているめっき鋼板の表面に難溶性の酸化物または水酸化物となって再析出し、皮膜欠陥部を埋めることができる。 Further, by including the 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.
　上記表面処理層は、有機顔料などを含む着色された皮膜であってもよいが、リン酸塩処理層による黒色の外観の視認性をより高めて、塗装鋼板の意匠性をより高める観点からは、クリア皮膜であることが好ましい。 The surface-treated layer may be a colored film containing an organic pigment or the like, but from the viewpoint of further enhancing the visibility of the black appearance of the phosphate-treated layer and further enhancing the design of the coated steel sheet. , It is preferable that it is a clear film.
　絞り加工時に絞り用ダイまたは絞り用パンチなどとの間の摩擦で剥離した表面処理層（特には有機樹脂）が抵抗となることによる、加工性の低下を抑制する観点からは、上記表面処理層の膜厚は、３．０μｍ以下であることが好ましい。なお、表面処理鋼板の表面および裏面の潤滑性を上記動摩擦係数μ１、動摩擦係数μ２、および静摩擦係数μ３の条件が満たされるように調整しやすくする観点からは、上記表面処理層の膜厚は、０．０５μｍ以上であることが好ましい。また、潤滑性の調整および剥離した表面処理層による加工性の低下の抑制を両立する観点からは、上記表面処理層の膜厚は、表面および裏面に形成された表面処理層のうち少なくともいずれか一方の膜厚が、０．１μｍ以上３．０μｍ以下であることが好ましく、０．１５μｍ以上０．９μｍ以下であることがより好ましい。 From the viewpoint of suppressing deterioration of workability due to resistance of the surface treatment layer (particularly organic resin) peeled off by friction between the drawing die or the drawing punch during drawing, the surface treatment layer is described above. The film thickness of is preferably 3.0 μm or less. From the viewpoint of facilitating the adjustment of the lubricity of the front surface and the back surface of the surface-treated steel sheet so that the conditions of the dynamic friction coefficient μ1, the dynamic friction coefficient μ2, and the static friction coefficient μ3 are satisfied, the film thickness of the surface-treated layer is set. It is preferably 0.05 μm or more. Further, from the viewpoint of both adjusting the lubricity and suppressing the deterioration of workability due to the peeled surface treatment layer, the film thickness of the surface treatment layer is at least one of the surface treatment layers formed on the front surface and the back surface. On the other hand, the film thickness is preferably 0.1 μm or more and 3.0 μm or less, and more preferably 0.15 μm or more and 0.9 μm or less.
　表面処理鋼板は、少なくとも表面側に、上記有機系潤滑剤を含む表面処理層を有することが好ましい。このとき、上記表面側に形成された表面処理層に、上述した４族金属の酸素酸塩およびリン酸化合物を含ませることで、上記表面側の耐食性をより高めることができる。 The surface-treated steel sheet preferably has a surface-treated layer containing the above-mentioned organic lubricant on at least the surface side. At this time, the corrosion resistance of the surface side can be further enhanced by impregnating the surface treatment layer formed on the surface side with the oxygen salt and the phosphoric acid compound of the above-mentioned Group 4 metal.
　表面処理鋼板は、裏面側には、上記表面処理層を有してもよいし、上記表面処理層を有さなくてもよい。ただし、上述した４族金属の酸素酸塩およびリン酸化合物を含む表面処理層を上記裏面側に形成することで、上記裏面側の耐食性をより高めることができる。上記裏面側に形成される表面処理層には、上記有機系潤滑剤が含まれていてもよいし、上記有機系潤滑剤が含まれていなくてもよいが、裏面側の動摩擦係数μ２の低下を抑制したり、表面と裏面との間の静摩擦係数μ３の低下を抑制したりする観点からは、上記裏面側に形成される表面処理層には、上記有機系潤滑剤は含まれていないことが好ましい。上記裏面側に形成される表面処理層が上記有機系潤滑剤を含むときは、上記有機系潤滑剤の付着量は、上記動摩擦係数μ２および静摩擦係数μ３を上述した範囲に調整できる程度の量に調整すればよい。 The surface-treated steel sheet may or may not have the surface-treated layer on the back surface side. However, by forming the surface treatment layer containing the above-mentioned group 4 metal oxygen salt and the phosphoric acid compound 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 μ2 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 μ3 between the front surface and the back surface. Is preferable. When the surface treatment layer formed on the back surface side contains the organic lubricant, the amount of the organic lubricant adhered to the amount is such that the dynamic friction coefficient μ2 and the static friction coefficient μ3 can be adjusted within the above ranges. You can adjust it.
　鋼板の種類にもよるものの、表面側に付着している上記有機系潤滑剤の量は、２．０ｍｇ／ｍ２以上５００ｍｇ／ｍ２以下であることが好ましく、７．０ｍｇ／ｍ２以上１４０ｍｇ／ｍ２以下であることがより好ましい。また、裏面側に付着している上記有機系潤滑剤の量は、０ｇ／ｍ２以上１００ｍｇ／ｍ２以下であることが好ましく、０ｇ／ｍ２以上５０ｍｇ／ｍ２以下であることがより好ましい。 Although it depends on the type of steel sheet, the amount of the organic lubricant adhering to the surface side is preferably 2.0 mg / m 2 or more and 500 mg / m 2 or less, and 7.0 mg / m 2 or more and 140 mg. It is more preferably / m 2 or less. The amount of the organic lubricant adhering to the back surface side is preferably 0 g / m 2 or more and 100 mg / m 2 or less, and more preferably 0 g / m 2 or more and 50 mg / m 2 or less. ..
　２．表面処理鋼板の製造方法
　本発明の他の実施形態は、表面処理鋼板の製造方法に関する。上記表面処理鋼板は、一方の面（表面）と他方の面（裏面）とを有する鋼板を用意する工程と、上記表面に、有機系潤滑剤を含む表面処理液を付与して、表面処理層を形成する工程と、上記裏面に、上記表面に付与した上記表面処理液とは組成が異なる表面処理液を付与するか、または上記裏面には表面処理層を形成しない工程と、を有する方法により、製造することができる。 2. 2. Method for Manufacturing Surface-treated Steel Sheet Another embodiment of the present invention relates to a method for manufacturing a surface-treated steel sheet. The surface-treated steel plate is a surface-treated layer by preparing a steel plate having one surface (front surface) and the other surface (back surface) and applying a surface treatment liquid containing an organic lubricant to the surface. By a method having a step of applying a surface treatment liquid having a composition different from that of the surface treatment liquid applied to the front surface to the back surface, or a step of not forming a surface treatment layer on the back surface. , Can be manufactured.
　表面および任意に裏面に付与される表面処理液は、上述した有機系潤滑剤、４族金属の酸素酸塩、リン酸化合物および有機樹脂、ならびに任意に添加される他の添加剤を含む表面処理液であればよい。 The surface treatment liquid applied to the front surface and optionally the back surface includes the above-mentioned organic lubricants, oxidates of Group 4 metals, phosphoric acid compounds and organic resins, and other additives optionally added. It may be a liquid.
　上記表面処理液に含まれる有機系潤滑剤の量は、上記表面処理液の全質量に対して、３質量％以上３０質量％以下とすることができ、４質量％以上２０質量％以下とすることが好ましい。 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.
　上記表面処理液に含まれる４族金属の酸素酸塩の量は、４族原子換算で、上記表面処理液の全質量に対して、０．５ｇ／Ｌ以上３０ｇ／Ｌ以下とすることができ、１ｇ／Ｌ以上２４ｇ／Ｌ以下とすることが好ましい。 The amount of Group 4 metal oxygenate contained in the surface treatment liquid can be 0.5 g / L or more and 30 g / L or less with respect to the total mass of the surface treatment liquid in terms of Group 4 atoms. It is preferably 1 g / L or more and 24 g / L or less.
　上記表面処理液に含まれるリン酸化合物の量は、リン原子換算で、上記４族金属の酸素酸塩に由来する金属原子の含有量の１モル倍以上２モル倍以下であることが好ましく、１．５モル倍以上１．７モル倍以下であることがより好ましい。 The amount of the phosphoric acid compound contained in the surface treatment liquid is preferably 1 mol times or more and 2 mol times or less the content of the metal atom derived from the oxyate acid salt of the group 4 metal in terms of phosphorus atom. It is more preferably 1.5 mol times or more and 1.7 mol times or less.
　上記表面処理液に含まれる有機樹脂の量は、上記表面処理液に対して、０ｇ／Ｌ以上１００ｇ／Ｌ以下とすることができ、０ｇ／Ｌ以上５０ｇ／Ｌ以下とすることが好ましい。 The amount of the organic resin contained in the surface treatment liquid can be 0 g / L or more and 100 g / L or less, and preferably 0 g / L or more and 50 g / L or less with respect to the surface treatment liquid.
　上記表面処理層は、上述した表面処理液を、鋼板の表面および裏面の少なくとも一方の面に付与して、公知の方法により乾燥させて形成することができる。このとき、上記裏面には上記表面処理液の付与による表面処理層の形成を行ってもよいし、行わなくてもよい。上記表面および裏面の両方に表面処理層を形成するときは、表面側に付与する表面処理液と、裏面側に付与する表面処理液とは、上述した動摩擦係数μ１、動摩擦係数μ２、および静摩擦係数μ３の条件が満たされるように調整すればよく、特には、有機系潤滑剤の含有量が異なることが好ましい。 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. When the surface treatment layer is formed on both the front surface and the back surface, 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 μ1, dynamic friction coefficient μ2, and static friction coefficient. It may be adjusted so that the condition of μ3 is satisfied, and it is particularly preferable that the content of the organic lubricant is different.
　３．表面処理鋼板の加工方法
　本発明のさらに他の実施形態は、上述した表面処理鋼板をプレス成型する、表面処理鋼板の加工方法に関する。具体的には、本実施形態に関する加工方法は、上記表面処理鋼板が打ち抜かれてなるブランク材を用意する工程と、上記ブランク材が有する上記一方の面を、ダイに接触させる工程と、上記ブランク材が有する上記他方の面を、上記ダイ側に押圧する工程と、を有する。 3. 3. Method for processing surface-treated steel sheet Another embodiment of the present invention relates to a method for processing a surface-treated steel sheet, which is press-molded from the above-mentioned surface-treated steel sheet. Specifically, the processing method according to the present embodiment includes a step of preparing a blank material obtained by punching out the surface-treated steel sheet, a step of bringing one surface of the blank material into contact with a die, and the blank. It has a step of pressing the other surface of the material toward the die side.
　上記ブランク材は、上述した表面処理鋼板が、円形などの所定の形状に打ち抜かれていればよい。 The blank material may be such that the surface-treated steel plate described above is punched into a predetermined shape such as a circle.
　上記ダイの形状や、他方の面の押圧は、絞り加工、張出し加工、フランジ加工、曲げ加工などの各種加工により製造しようとする加工品の形状などに応じて定めることができる。これらのうち、本実施形態では、深絞り加工が、パンチと接触する肩部で鋼板の破断が従来よりも生じにくいため好ましい。 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.
　以下、本発明について実施例を参照して詳細に説明するが、本発明はこれらの実施例により限定されない。 Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples.
　１．表面処理鋼板の作製
　１－１．めっき処理
　板厚０．６ｍｍの普通鋼の両面に溶融Ｚｎ－６質量％Ａｌ－３質量％Ｍｇめっき層（めっき付着量６０ｇ／ｍ２）を形成して、めっき鋼板１とした。 1. 1. Preparation of surface-treated steel sheet 1-1. Plating treatment A molten Zn-6% by mass Al-3% by mass Mg plating layer (plating adhesion amount 60 g / m 2 ) was formed on both sides of ordinary steel having a plate thickness of 0.6 mm to obtain a plated steel sheet 1.
　板厚０．６ｍｍの普通鋼の両面に溶融Ｚｎ－０．１質量％Ａｌめっき層（めっき付着量６０ｇ／ｍ２）を形成して、めっき鋼板２とした。 A molten Zn-0.1 mass% Al plating layer (plating adhesion amount 60 g / m 2 ) was formed on both sides of ordinary steel having a plate thickness of 0.6 mm to obtain a plated steel sheet 2.
　板厚０．６ｍｍの普通鋼の両面に溶融Ｚｎめっき層（めっき付着量６０ｇ／ｍ２）を形成して、めっき鋼板３とした。 A hot-dip Zn-plated layer (plating adhesion amount 60 g / m 2 ) was formed on both sides of ordinary steel having a plate thickness of 0.6 mm to form a plated steel sheet 3.
　１－２．表面処理
　１－２－１．表面処理液１～表面処理液１３の調製
　４族金属の添加量が金属原子換算で１２．０ｇ／Ｌである炭酸ジルコニウムアンモニウム（Ｚｒの酸素酸塩）と、リン原子換算の添加量が６．６ｇ／Ｌであるリン酸アンモニウム（リン酸化合物）とを含有するベース処理液に対し、ベース処理液中の固形分の全質量に対して１５．０質量％のポリエチレン系潤滑剤を添加して、表面処理液１を調製した。表面処理液１中の、リン酸化合物が有するリン原子のモル濃度に対する、４族金属酸素酸塩に由来する金属原子（Ｚｒ）のモル濃度の比（リン原子のモル濃度／４族金属のモル濃度）は、１．７である。 1-2. Surface treatment 1-2-1. Preparation of Surface Treatment Solution 1 to Surface Treatment Solution 13 Zirconium zirconium carbonate (Zr oxynate), which contains 12.0 g / L of Group 4 metal in terms of metal atom, and the amount of phosphorus atom added. To the base treatment liquid containing 6 g / L of ammonium phosphate (phosphate compound), 15.0% by mass of a polyethylene-based lubricant was added to the total mass of the solid content in the base treatment liquid. , Surface treatment liquid 1 was prepared. 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.
　ポリエチレン系潤滑剤の添加量をベース処理液中の固形分の全質量に対して１０．０質量％とした以外は表面処理液１の調製と同様にして、表面処理液２を調製した。 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.
　ポリエチレン系潤滑剤の添加量をベース処理液中の固形分の全質量に対して５．０質量％とした以外は表面処理液１の調製と同様にして、表面処理液３を調製した。 The surface treatment liquid 3 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 5.0% by mass with respect to the total mass of the solid content in the base treatment liquid.
　４族金属の酸素酸塩の添加量を４族金属の金属原子換算で１．１ｇ／Ｌとし、リン酸化合物の添加量をリン原子換算で０．６ｇ／Ｌとし、ベース処理液中にさらに固形分換算で４８．３ｇ／Ｌのウレタン樹脂を添加した以外は表面処理液１の調製と同様にして、表面処理液４を調製した。表面処理液４中の、リン酸化合物が有するリン原子のモル濃度に対する、４族金属酸素酸塩に由来する金属原子（Ｚｒ）のモル濃度の比（リン原子のモル濃度／４族金属のモル濃度）は、１．５である。 The amount of the oxyacid acid salt added to the Group 4 metal was set to 1.1 g / L in terms of the metal atom of the Group 4 metal, and the amount of the phosphoric acid compound added was set to 0.6 g / L in terms of the phosphorus atom. The surface treatment liquid 4 was prepared in the same manner as the preparation of the surface treatment liquid 1 except that 48.3 g / L of urethane resin was added in terms of solid content. The ratio of the molar concentration of the metal atom (Zr) derived from the Group 4 metal oxyatetate to the molar concentration of the phosphorus atom of the phosphoric acid compound in the surface treatment liquid 4 (molar concentration of the phosphorus atom / molar concentration of the Group 4 metal). Concentration) is 1.5.
　ポリエチレン系潤滑剤の添加量をベース処理液中の固形分の全質量に対して１０．０質量％とした以外は表面処理液４の調製と同様にして、表面処理液５を調製した。 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.
　ポリエチレン系潤滑剤の添加量をベース処理液中の固形分の全質量に対して５．０質量％とした以外は表面処理液４の調製と同様にして、表面処理液６を調製した。 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.
　４族金属の添加量が金属原子換算で１０．０ｇ／Ｌであるフッ化チタンアンモニウム（Ｔｉの酸素酸塩）と、リン原子換算の添加量が１２．０ｇ／Ｌであるリン酸とを含有するベース処理液を用意して、表面処理液７とした。表面処理液７中の、リン酸化合物が有するリン原子のモル濃度に対する、４族金属酸素酸塩に由来する金属原子（Ｔｉ）のモル濃度の比（リン原子のモル濃度／４族金属のモル濃度）は、１．９である。 Contains 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 ratio of the molar concentration of the metal atom (Ti) derived from the Group 4 metal oxyatetate to the molar concentration of the phosphorus atom of the phosphoric acid compound in the surface treatment liquid 7 (molar concentration of the phosphorus atom / molar concentration of the Group 4 metal). Concentration) is 1.9.
　ポリエチレン系潤滑剤を添加しなかった以外は表面処理液４の調製と同様にして、表面処理液８を調製した。 The surface treatment liquid 8 was prepared in the same manner as the preparation of the surface treatment liquid 4 except that the polyethylene-based lubricant was not added.
　ポリエチレン系潤滑剤を添加しなかった以外は表面処理液１の調製と同様にして、表面処理液９を調製した。 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.
　４族金属の添加量が金属原子換算で１．０ｇ／Ｌであるフッ化チタンアンモニウム（Ｔｉの酸素酸塩）と、リン原子換算の添加量が１．２ｇ／Ｌであるリン酸アンモニウム（リン酸化合物）とを含有するベース処理液に対し、固形分換算で４８．３ｇ／Ｌのウレタン樹脂を添加し、さらに、ベース処理液中の固形分の全質量に対して１０．０質量％のポリエチレン系潤滑剤を添加して、表面処理液１０を調製した。表面処理液１０中の、リン酸化合物が有するリン原子のモル濃度に対する、４族金属酸素酸塩に由来する金属原子（Ｔｉ）のモル濃度の比（リン原子のモル濃度／４族金属のモル濃度）は、１．９である。 The amount of Group 4 metal added is 1.0 g / L in terms of metal atom equivalent, titanium fluoride ammonium fluoride (oxytate of Ti), and the amount added in terms of phosphorus atom is 1.2 g / L, ammonium phosphate (phosphorus). A urethane resin of 48.3 g / L in terms of solid content is added to the base treatment liquid containing the acid compound), and further, 10.0% by mass with respect to the total mass of the solid content in the base treatment liquid. A polyethylene-based lubricant was added to prepare a surface treatment liquid 10. The ratio of the molar concentration of the metal atom (Ti) derived from the Group 4 metal oxyatetate to the molar concentration of the phosphorus atom of the phosphoric acid compound in the surface treatment liquid 10 (molar concentration of the phosphorus atom / molar concentration of the Group 4 metal). Concentration) is 1.9.
　４族金属の酸素酸塩を添加しなかった以外は表面処理液１０の調製と同様にして、表面処理液１１を調製した。 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.
　リン酸化合物を添加しなかった以外は表面処理液５の調製と同様にして、表面処理液１２を調製した。 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.
　４族金属の酸素酸塩を添加せず、かつ、リン酸化合物を添加しなかった以外は表面処理液５の調製と同様にして、表面処理液１３を調製した。 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.
　表１に、表面処理液１～表面処理液１３の、４族金属の種類及び添加量、リン酸化合物の添加の有無およびリン原子の添加量、リン酸化合物が有するリン原子のモル濃度に対する４族金属酸素酸塩に由来する金属原子のモル濃度の比（表中、単に「モル比」と示す。）、ベース処理液中の有機樹脂の種類および添加量、ならびに有機系潤滑剤の種類および添加量を、示す。 Table 1 shows the types and amounts of Group 4 metals added in the surface treatment liquids 1 to 13, the presence / absence of the addition of the phosphoric acid compound and the amount of the phosphorus atom added, and 4 with respect to the molar concentration of the phosphorus atom of the phosphoric acid compound. The ratio of the molar concentration of the metal atom derived from the group metal oxalate (indicated simply as "molar ratio" in the table), the type and amount of the organic resin added in the base treatment liquid, and the type of the organic lubricant and The amount of addition is shown.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　１－２－２．表面処理
　めっき鋼板１～めっき鋼板３の表面および裏面に、表面処理液１～表面処理液１３のいずれかを塗布し、２００℃のオーブンで乾燥させて、表面処理鋼板１～表面処理鋼板２７を得た。 1-2-2. Surface treatment One of the surface treatment liquid 1 to the surface treatment liquid 13 is applied to the front surface and the back surface of the plated steel sheet 1 to the plated steel sheet 3 and dried in an oven at 200 ° C. to obtain the surface treatment steel sheet 1 to the surface treatment steel sheet 27. Obtained.
　表２に、表面処理鋼板１～表面処理鋼板２７の作製に用いためっき鋼板の種類、表面処理液の種類およびその膜厚を示す。 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.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　２．表面処理鋼板の評価
　２－１．動摩擦係数μ１およびμ２
　ＪＩＳ Ｋ ７１２５（１９９９年）に準じて、表面の動摩擦係数μ１および裏面の動摩擦係数μ２を測定した。測定機として新東科学株式会社製、ＨＥＩＤＥＮ ＴＹＰＥ：１４を使用し、固定試験片として表面処理鋼板１～表面処理鋼板２７を、移動試験片として１０ｍｍφのＳＵＳ製鋼球を、それぞれ使用した。分銅により移動試験片に１Ｎの荷重をかけた状態で、摺動速度１５０ｍｍ／ｍｉｎで１００ｍｍの距離を移動試験片に移動させ、動摩擦係数を測定した。 2. 2. Evaluation of surface-treated steel sheet 2-1. Dynamic friction coefficients μ1 and μ2
According to JIS K 7125 (1999), the dynamic friction coefficient μ1 on the front surface and the dynamic friction coefficient μ2 on the back surface were measured. A HEIDEN TYPE: 14 manufactured by Shinto Kagaku Co., Ltd. was used as a measuring machine, surface-treated steel plates 1 to 27 were used as fixed test pieces, and SUS steel balls having a diameter of 10 mm were used as moving test pieces. With a load of 1N applied to the moving test piece by the weight, the moving test piece was moved over a distance of 100 mm at a sliding speed of 150 mm / min, and the dynamic friction coefficient was measured.
　２－２．静摩擦係数μ３
　図１に示す方法で、表面と裏面との間の静摩擦係数を測定した。表面処理鋼板１～表面処理鋼板２７から、幅３０ｍｍ×長さ３００ｍｍの引き抜き用供試サンプル１１０と、幅３０ｍｍ×長さ４０ｍｍの２つの押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂと、を切り出した。押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂは、それぞれ、両面テープ１３０ａおよび両面テープ１３０ｂによって取付金型１４０ａおよび取付金型１４０ｂに接着させた。 2-2. Static friction coefficient μ3
The coefficient of static friction between the front surface and the back surface was measured by the method shown in FIG. From the surface-treated steel plate 1 to the surface-treated steel plate 27, a test sample 110 for drawing with a width of 30 mm × a length of 300 mm, two test samples 120a for holding and a test sample 120b for holding with a width of 30 mm × a length of 40 mm, Was cut out. The pressing test sample 120a and the pressing test sample 120b were adhered to the mounting die 140a and the mounting die 140b by the double-sided tape 130a and the double-sided tape 130b, respectively.
　引き抜き用供試サンプル１１０の表面に押さえ用供試サンプル１２０ａの裏面が、引き抜き用供試サンプル１１０の裏面に押さえ用供試サンプル１２０ｂの表面が、それぞれ接触するように、同一水平面上に対向して配置した押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂの間に引き抜き用供試サンプル１１０を配置した。さらに、引き抜き用供試サンプル１１０の両側から押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂを押し当て、取付金型１４０ａおよび取付金型１４０ｂを介して、押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂを引き抜き用供試サンプル１１０側に６００ｋｇｆの荷重で押圧した。 The back surface of the test sample 120a for pressing is in contact with the front surface of the test sample 110 for extraction, and the front surface of the test sample 120b for pressing is in contact with the back surface of the test sample 110 for extraction. The extraction test sample 110 was placed between the holding test sample 120a and the holding test sample 120b. Further, the pressing test sample 120a and the pressing test sample 120b are pressed from both sides of the drawing test sample 110, and the pressing test sample 120a and the pressing test sample 120a are pressed through the mounting die 140a and the mounting die 140b. The test sample 120b was pressed against the test sample 110 for extraction with a load of 600 kgf.
　この状態で、引き抜き用供試サンプル１１０を垂直方向に１００ｍｍ／ｍｉｎの速度で引きにき、引き抜き直後に印加されていた、引き抜き用供試サンプル１１０を引き抜くための力を測定した。そして、上記引き抜き用供試サンプル１１０を引き抜くための力を、押さえ用供試サンプル１２０ａおよび押さえ用供試サンプル１２０ｂを引き抜き用供試サンプル１１０側に押圧した荷重（６００ｋｇｆ）で除算して、静摩擦係数μ３を求めた。得られた静摩擦係数の値に基づき、以下の基準で表面処理鋼板１～表面処理鋼板２７を評価した。
　○　静摩擦係数μ３が０．１４より大きい
　×　静摩擦係数μ３が０．１４以下である In this state, 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 μ3 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 μ3 is larger than 0.14 × Static friction coefficient μ3 is 0.14 or less
　２－３．加工性
　打ち抜き用パンチを用いて、表面処理鋼板１～表面処理鋼板２７から、径９２ｍｍφの円盤状のブランク材を打ち抜いた。 2-3. Workability Using a punch for punching, a disk-shaped blank material having a diameter of 92 mmφ was punched from the surface-treated steel plates 1 to 27.
　上記ブランク材を用いて、パンチ径４０ｍｍφ、パンチ肩半径５ｍｍＲ、ダイ内径４１．５ｍｍφ、ダイ肩半径３．０ｍｍＲの加工装置を用いて、絞り比（ブランクの径／パンチ径）２．３、しわ抑え力９．２ｋＮの条件で、円筒絞り加工を行った。ブランク材の外径をＬ１とし、加工後の円筒の開口径の最大値および最小値の加算平均をＬ２として、Ｌ２／Ｌ１の値を求め、外径比Ｏ．Ｄ．Ｒ．とした。Ｏ．Ｄ．Ｒ．の値に基づき、以下の基準で表面処理鋼板１～表面処理鋼板２７の加工性を評価した。
　◎　Ｏ．Ｄ．Ｒ．が０．９０以下である
　○　Ｏ．Ｄ．Ｒ．が０．９０超０．９４以下である
　×　Ｏ．Ｄ．Ｒ．が０．９４超である Using the above blank material, using a processing device with a punch diameter of 40 mmφ, punch shoulder radius of 5 mmR, die inner diameter of 41.5 mmφ, and die shoulder radius of 3.0 mmR, drawing ratio (blank diameter / punch diameter) 2.3, wrinkles. Cylindrical drawing was performed under the condition of a holding force of 9.2 kN. The value of L2 / L1 was obtained by setting the outer diameter of the blank material to L1 and the added average of the maximum and minimum values of the opening diameter of the cylinder after processing to L2. D. R. And said. O. D. R. Based on the value of, the workability of the surface-treated steel sheet 1 to the surface-treated steel sheet 27 was evaluated according to the following criteria.
◎ O. D. R. Is 0.90 or less ○ O. D. R. Is more than 0.90 and less than 0.94 × O. D. R. Is over 0.94
　２－４．耐食性
　表面処理鋼板１～表面処理鋼板２７を塩水噴霧試験機に投入し、７２時間後の表面および裏面への白錆発生面積率および赤錆発生面積率を求め、以下の基準により、当該白錆発生面積率および赤錆発生面積率から表面処理鋼板１～表面処理鋼板２７の耐食性を評価した。
　○：　白錆発生面積率は表面・裏面とも１０％以下だった
　△：　白錆発生面積率は表面・裏面のいずれかまたは双方が１０％超だったが、赤錆の発生はなかった
　×：　赤錆発生面積率は表面・裏面のいずれかまたは双方が１０％超だった 2-4. Corrosion resistance The surface-treated steel sheets 1 to 27 were put into a salt spray tester, and the white rust generation area ratio and red rust generation area ratio on the front and back surfaces after 72 hours were obtained. The corrosion resistance of the surface-treated steel sheets 1 to 27 was evaluated from the area ratio and the red rust generation area ratio.
○: The area ratio of white rust was 10% or less on both the front and back surfaces. Δ: The area ratio of white rust was more than 10% on either or both of the front and back surfaces, but no red rust was generated. ×: Red rust The generated area ratio was more than 10% on either the front side or the back side or both.
　表３に、表面処理鋼板１～表面処理鋼板２７の評価結果を示す。 Table 3 shows the evaluation results of the surface-treated steel sheets 1 to 27.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　表面の動摩擦係数μ１が０．１以下であり、裏面の摩擦係数μ２が０．２以上である、表面処理鋼板１～表面処理鋼板１４、表面処理鋼板１９～表面処理鋼板２２、および表面処理鋼板２４～表面処理鋼板２７は、深絞りの加工性が良好であった。また、表面処理鋼板１～表面処理鋼板１４、表面処理鋼板１９～表面処理鋼板２２、および表面処理鋼板２４～表面処理鋼板２７は、表面と裏面との間の静摩擦係数μ３が０．１４より大きく、コイル保管性も高かった。 Surface-treated steel plate 1 to surface-treated steel plate 14, surface-treated steel plate 19 to surface-treated steel plate 22, and surface-treated steel plate having a front surface dynamic friction coefficient μ1 of 0.1 or less and a back surface friction coefficient μ2 of 0.2 or more. 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 μ3 between the front surface and the back surface larger than 0.14. The coil storage was also high.
　本発明の表面処理鋼板は、ホットスタンピングによる加工を行ったときにスケールが発生しにくい。そのため、スケール除去などの工程を短縮化あるいは不要とし、ホットスタンピングによる鋼板の加工をより容易かつ安価に行うことを可能とする。そのため、本発明の表面処理鋼板は、ホットスタンピングによる鋼板の加工のさらなる普及に貢献すると期待される。 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.
　１１０　引き抜き用供試サンプル
　１２０ａ、１２０ｂ　押さえ用供試サンプル
　１３０ａ、１３０ｂ　両面テープ
　１４０ａ、１４０ｂ　取付金型
　２１０　ブランク材
　２１２　表面
　２１２ｂ　絞り用ダイと接触している領域
　２１４　裏面
　２１４ｂ　絞り用パンチと接触している領域
　２１６　鋼板
　２２０　深絞り用金型
　２２２　絞り用ダイ
　２２２ａ　開口部
　２２４　皺押さえ部材
　２２４ａ　開口部
　２２６　絞り用パンチ
　３００　ロール体
　３１０　表面処理鋼板
　３１２　表面
　３１４　裏面
　３１６　鋼板 110 Samples for drawing 120a, 120b Samples for pressing 130a, 130b Double-sided tape 140a, 140b Mounting die 210 Blank material 212 Front surface 212b Area in contact with drawing die 214 Back side 214b In contact with drawing punch Area 216 Steel plate 220 Deep drawing die 222 Drawing die 222a Opening 224 Wrinkle holding member 224a Opening 226 Drawing punch 300 Roll body 310 Surface treated steel plate 312 Front surface 314 Back surface 316 Steel plate

Claims (9)

  1. 　一方の面と他方の面とを有する表面処理鋼板であって、
    　前記一方の面は、動摩擦係数μ１が０．１以下であり、
    　前記他方の面は、動摩擦係数μ２が０．２以上であり、かつ、
    　前記一方の面と前記他方の面との間の静摩擦係数μ３は、０．１４より大きい、
    　表面処理鋼板。     A surface-treated steel sheet having one surface and the other surface.
    One of the surfaces has a dynamic friction coefficient μ1 of 0.1 or less.
    On the other surface, the dynamic friction coefficient μ2 is 0.2 or more, and the dynamic friction coefficient μ2 is 0.2 or more.
    The coefficient of static friction μ3 between the one surface and the other surface is larger than 0.14.
    Surface-treated steel sheet.
  2. 　前記一方の面は、フッ素系樹脂、ポリオレフィン系樹脂およびスチレン系樹脂からなる群から選択される有機系潤滑剤を含む表面処理層を有する、請求項１に記載の表面処理鋼板。 The surface-treated steel sheet according to claim 1, wherein one of the surfaces has a surface-treated layer containing an organic lubricant selected from the group consisting of a fluororesin, a polyolefin-based resin, and a styrene-based resin.
  3. 　前記表面処理層は、膜厚が３μｍ以下である、請求項２に記載の表面処理鋼板。 The surface-treated steel sheet according to claim 2, wherein the surface-treated layer has a film thickness of 3 μm or less.
  4. 　前記表面処理層は、４族金属の酸素酸塩と、リン酸化合物と、を含み、
    　前記表面処理層における前記４族金属の酸素酸塩の付着量は、４族原子換算で３ｍｇ／ｍ２以上であり、かつ、
    　前記表面処理層における前記リン酸化合物の付着量は、リン原子換算で、前記４族金属の酸素酸塩に由来する金属原子の付着量の１モル倍以上２モル倍以下である、
    　請求項２または３に記載の表面処理鋼板。     The surface-treated layer contains a group 4 metal oxynate and a phosphoric acid compound.
    The amount of the oxygen acid salt of the Group 4 metal adhered to the surface treatment layer is 3 mg / m 2 or more in terms of Group 4 atoms, and the amount is 3 mg / m 2.
    The amount of the phosphoric acid compound adhered to the surface-treated layer is 1 mol times or more and 2 mol times or less the amount of the metal atom derived from the oxygen salt of the group 4 metal in terms of phosphorus atom.
    The surface-treated steel sheet according to claim 2 or 3.
  5. 　前記他方の面は、表面処理層を有し、
    　前記他方の面が有する表面処理層は、前記一方の面が有する表面処理層とは組成が異なる、請求項２～４のいずれか１項に記載の表面処理鋼板。     The other surface has a surface treatment layer and
    The surface-treated steel plate according to any one of claims 2 to 4, wherein the surface-treated layer having the other surface has a composition different from that of the surface-treated layer having the other surface.
  6. 　前記一方の面および他方の面の少なくとも１つの面は、０．１質量％以上のＡｌを含有する亜鉛系めっき層を有する、請求項１～５のいずれか１項に記載の表面処理鋼板。 The surface-treated steel sheet according to any one of claims 1 to 5, wherein the one surface and at least one surface of the other surface have a zinc-based plating layer containing 0.1% by mass or more of Al.
  7. 　絞り加工用の表面処理鋼板である、請求項１～６のいずれか１項に記載の表面処理鋼板。 The surface-treated steel sheet according to any one of claims 1 to 6, which is a surface-treated steel sheet for drawing.
  8. 　一方の面と他方の面とを有する鋼板を用意する工程と、
    　前記一方の面に、有機系潤滑剤を含む表面処理液を付与して、表面処理層を形成する工程と、
    　前記他方の面に、前記一方の面に付与した前記表面処理液とは組成が異なる表面処理液を付与する工程と、
    　を有する、請求項１～７のいずれか１項に記載の表面処理鋼板の製造方法。     The process of preparing a steel sheet having one surface and the other surface,
    A step of applying a surface treatment liquid containing an organic lubricant to one of the surfaces to form a surface treatment layer, and a step of forming the surface treatment layer.
    A step of applying a surface treatment liquid having a composition different from that of the surface treatment liquid applied to the one surface to the other surface.
    The method for producing a surface-treated steel sheet according to any one of claims 1 to 7.
  9. 　請求項１～７のいずれか１項に記載の表面処理鋼板が所定の形状に打ち抜かれてなるブランク材を用意する工程と、
    　前記ブランク材が有する前記一方の面を、ダイに接触させる工程と、
    　前記ブランク材が有する前記他方の面を、前記ダイ側に押圧する工程と、
    　を有する、表面処理鋼板の加工方法。     A step of preparing a blank material obtained by punching the surface-treated steel sheet according to any one of claims 1 to 7 into a predetermined shape, and
    A step of bringing the one surface of the blank material into contact with the die,
    A step of pressing the other surface of the blank material toward the die side,
    A method for processing a surface-treated steel sheet.
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JP2020007606A (en) * 2018-07-06 2020-01-16 日本製鉄株式会社 Surface-treated steel plate and method of manufacturing surface-treated steel plate

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