US20140008232A1 - Metal member and method of manufacturing same - Google Patents

Metal member and method of manufacturing same Download PDF

Info

Publication number
US20140008232A1
US20140008232A1 US14/006,885 US201214006885A US2014008232A1 US 20140008232 A1 US20140008232 A1 US 20140008232A1 US 201214006885 A US201214006885 A US 201214006885A US 2014008232 A1 US2014008232 A1 US 2014008232A1
Authority
US
United States
Prior art keywords
layer
texture
insulating layer
metal substrate
metal member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/006,885
Other languages
English (en)
Inventor
Osamu Mizuno
Masatada Numano
Kohji Inokuchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD. reassignment SUMITOMO ELECTRIC INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INOKUCHI, KOHJI, MIZUNO, OSAMU, NUMANO, MASATADA
Publication of US20140008232A1 publication Critical patent/US20140008232A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/02—Electroplating of selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/02—Electroplating of selected surface areas
    • C25D5/022—Electroplating of selected surface areas using masking means
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
    • C25D5/44—Aluminium

Definitions

  • the present invention relates to a metal member that includes a metal substrate having a covering layer on a surface thereof and a method for manufacturing the metal member. More particularly, the present invention relates to a metal member that includes regions having different surface textures.
  • metal members that include a metal substrate having a finely roughened surface to enhance their metallic textures and are used as housings for portable electrical equipment.
  • Patent Literature 1 discloses a metal member that includes a magnesium alloy substrate having a diamond-cut or hairline-finished surface and a covering layer made of a transparent resin disposed on the surface.
  • Patent Literature 1 a rough surface, such as a hairline-finished surface, of a metal substrate can be seen through a transparent covering layer to visually improve its metallic texture. Because of a flat and smooth surface of the covering layer disposed on the metal substrate, however, it is difficult to feel the tactile texture of the roughened metal substrate. Even if the rough texture can be visually felt, it is impossible to feel the rough texture both visually and tactually.
  • the tactile texture of the covering layer is independent of the surface texture of the metal substrate. There are no studies on forming a covering layer having different tactile textures. There are also no studies on a covering layer having different visual textures.
  • a metal member that includes a metal substrate having a covering layer provided thereon and includes surface regions in which visual or tactile textures are partially different.
  • the present invention achieves these objects by modifying a method for forming a covering layer such that a desired surface region of a metal substrate can be selectively coated.
  • a method for forming a covering layer may include the use of a mask. First, a metal substrate is coated with a paint while a surface portion (desired surface region) of the metal substrate is masked to form a portion of the covering layer. After the mask is removed, the portion of the covering layer is masked. The other surface portion of the metal substrate is then coated with another paint that is visually or tactually different from the first paint.
  • the resulting covering layer on the metal substrate can have visually or tactually different textures.
  • the operation is difficult to do in a fine masked region, and the formation of the covering layer using the mask requires complex work.
  • a covering layer containing surface regions having visually or tactually different textures can be easily formed without using a mask by forming an insulating layer on the entire surface of a metal substrate, removing the insulating layer in a desired region to expose the surface of the metal substrate, and forming a layer on the exposed surface by electrodeposition coating or electroplating.
  • the present invention is based on this finding.
  • a metal member according to the present invention includes a metal substrate and a covering layer disposed on a surface of the metal substrate.
  • the covering layer includes a region containing an insulating layer made of an insulating material and a region containing an electrodeposited layer having a different texture from the insulating layer and formed by electrodeposition coating or electroplating.
  • the texture includes a tactile texture and a visual texture.
  • the metal member may include surface regions having tactually or visually different textures or tactually and visually different textures.
  • the metal member can include regions having different surface textures.
  • the tactile texture can be altered from portion to portion.
  • the covering layer includes a rough surface region and a flat and smooth surface region
  • a metallic luster due to the presence and absence of asperities can be achieved with the tactile texture of the asperities.
  • the visual texture can be altered from portion to portion.
  • the covering layer includes a matte region and a transparent region
  • the matte region can have a soft visual texture, and the surface of the metal substrate can be seen through the transparent region.
  • the high-quality metallic texture of the metal substrate can be experienced as the visual texture.
  • the covering layer has a matte metallic texture over the entire surface
  • the insulating layer and the electrodeposited layer can have different degrees of matte to alter the color tone from portion to portion.
  • the different degrees of matte can be experienced as the visual texture.
  • the textures of the insulating layer and the electrodeposited layer are tactually and visually differentiated from each other to provide different textures each having a tactile texture that conforms to its visual texture.
  • the rough region has not only a visual texture due to asperities but also a tactile texture that conforms to its visual texture due to asperities.
  • the other portion of the covering layer is a flat and smooth region being transparent and disposed on a mirror-finished metal substrate
  • the visual metallic texture of the mirror-finished shiny metal substrate and the tactile texture of the flat and smooth covering layer that conforms to the mirror-finished surface can simultaneously be achieved despite the mirror-finished surface being underneath the covering layer.
  • the metal member including such a covering layer can have a visual texture that conforms to its tactile texture. This can solve the problem of the related art that the visual texture of asperities does not conform to the corresponding tactile texture when an entirely flat and smooth covering layer is used.
  • the visual textures of the insulating layer and the electrodeposited layer may be differentiated from each other to put a decoration, such as a pattern or letters, on the metal member.
  • the insulating layer and the electrodeposited layer of a covering layer according to the present invention can be independently formed so as to have individual colors. This can prevent the occurrence of irregular color.
  • the insulating layer is made of an insulating material, and the electrodeposited layer is formed by electrodeposition coating or electroplating, the electrodeposited layer can be selectively formed on a portion of the metal substrate, and the covering layer can be easily formed without using a mask by a method for manufacturing a metal member according to the present invention described below.
  • At least one of the insulating layer and the electrodeposited layer formed by electrodeposition coating is made of a resin containing an additive agent.
  • the tactile and visual textures can be easily and partially altered by using a resin containing an additive agent as a material for the layers.
  • a metallic material such as Al
  • mica can also be used to improve the metallic texture.
  • the shape of the additive agent may be fibrous, flat, or particulate. SiO 2 or polymer particles may be used as the additive agent to visually improve the matte metallic texture.
  • transparent additive agents are preferably used to further improve the tactile texture.
  • the metal additive agent such as Al
  • an additive agent like SiO 2 may be mixed to tactually and visually improve a texture containing both the shiny metallic texture and the matte metallic texture.
  • a transparent resin layer containing an additive agent such as SiO 2 or the like may be stacked on a resin layer containing a metal additive agent.
  • the size or amount of the additive agent can be controlled to alter the degree of the tactile texture or the visual texture.
  • the metal substrate includes a mirror-finished surface portion on a part of the surface of the metal substrate, one of the insulating layer and the electrodeposited layer formed by electrodeposition coating is made of a transparent resin disposed on the finished surface portion, and the other of the insulating layer and the electrodeposited layer formed by electrodeposition coating is made of a resin containing an additive agent.
  • the tactile texture of the metal member is independent of the surface texture of metal substrate but depends on the surface texture of the covering layer.
  • the visual texture of the metal member may depend on the visual surface texture of the covering layer or the visual surface texture of the metal substrate.
  • the formation of a mirror-finished surface portion on a part of the metal substrate can improve the shiny, flat and smooth metallic texture of the metal substrate.
  • the metallic texture of the finished surface portion can be seen through the transparent layer.
  • the transparent layer may be colored, the color of the metal substrate itself can be easily recognized through a colorless transparent layer.
  • transparent as used herein, means that the metal substrate can be seen through the covering layer and includes translucent.
  • the transparent layer generally has a flat and smooth surface
  • the region viewed from the top of the metal member can have a tactually flat and smooth texture as well as a visually flat and smooth texture.
  • the other of the insulating layer and the electrodeposited layer is made of a resin containing an additive agent
  • the asperities due to the additive agent can be tactually and visually perceived as a matte metallic texture.
  • the insulating layer and the electrodeposited layer can have different textures, and each of the insulating layer and the electrodeposited layer can have a tactile metallic texture that conforms to its visual metallic texture.
  • the insulating layer and the electrodeposited layer formed by electrodeposition coating have different colors.
  • a decoration such as a pattern or letters, may be put on the metal member.
  • the different colorless materials may be a combination of transparent and opaque materials or a combination of transparent and translucent materials.
  • the metal substrate is made of a magnesium alloy.
  • magnesium alloys are suitably used in housings for portable electrical equipment.
  • Mg—Al alloys containing Al have high corrosion resistance, high strength, and excellent mechanical characteristics, such as plastic deformation resistance.
  • the Al content is preferably in the range of 2.5% to 9.5% by mass. Examples of the representative compositions of Mg—Al alloys having the Al content described above include AZ31, AZ61,AM60, and AZ91 alloys according to the American Society for Testing and Materials standards.
  • a metal member according to the present invention can be easily manufactured by the following method.
  • a method for manufacturing a metal member according to the present invention includes the following steps:
  • the covering layer including the insulating layer and the electrodeposited layer is formed on a surface of the metal substrate.
  • the formation method in the electrodeposited-layer-forming step that is, electrodeposition coating or electroplating can selectively form the electrodeposited layer only on the exposed portion that is formed on a portion of the metal substrate.
  • the covering layer containing surface regions having visually or tactually different textures can be easily formed without using a mask.
  • the removing step is performed by irradiating the insulating layer with a laser beam.
  • the method for removing a portion of the insulating layer using laser irradiation can be used to completely remove a desired target region, even a fine region or a corner region, of the insulating layer.
  • the metal member can include regions having different surface textures.
  • the tactile texture can be differentiated from the visual texture, and each region can have a tactile metallic texture that conforms to its visual metallic texture, thereby effectively improving the metallic texture.
  • a method for manufacturing a metal member according to the present invention can be used to selectively apply a coating to a desired surface region of a metal substrate to easily form a covering layer including surface regions having visually or tactually different textures without using a mask.
  • FIG. 1 is an explanatory view of a method for manufacturing a metal member according to an embodiment of the present invention.
  • a metal member according to an embodiment of the present invention will be described below.
  • a metal member according to the present invention includes a metal substrate and a covering layer disposed on the metal substrate.
  • the metal substrate constituting a metal member according to the present invention is preferably a light alloy, such as a magnesium alloy or an aluminum alloy.
  • the magnesium alloy has high strength and preferably contains at least one element selected from the group consisting of Al, Zn, Mn, Si, Ca, Be, Sr, Y, Cu, Ag, Sn, Au, Ni, Li, Zr, Ce, and rare-earth elements (other than Y and Ce), which constitutes 2.5% by mass or more in total. The remainder may be Mg and incidental impurities.
  • Mg—Al alloys containing Al have high corrosion resistance, high strength, and excellent mechanical characteristics, such as plastic deformation resistance. These effects tend to increase with increasing Al content.
  • the Al content is preferably 4.5% by mass or more, more preferably 7% by mass or more.
  • the upper limit is preferably 12% by mass, more preferably 11% by mass.
  • the amount of element(s) described above other than Al is preferably 0.01% by mass or more and 10% by mass or less, particularly preferably 0.1% by mass or more and 5% by mass or less, in total.
  • the impurities include Fe.
  • the rare-earth element content is preferably 0.1% by mass or more.
  • the Y content is preferably 0.5% by mass or more.
  • Mg—Al alloys examples include AZ alloys (Mg—Al—Zn alloys, Zn: 0.2% to 1.5% by mass), AM alloys (Mg—Al—Mn alloys, Mn: 0.15% to 0.5% by mass), Mg-Al-rare-earth element (RE) alloys, AX alloys (Mg—Al—Ca alloys, Ca: 0.2% to 6.0% by mass), and AJ alloys (Mg—Al—Sr alloys, Sr: 0.2% to 7.0% by mass) as defined in the American Society for Testing and Materials standards.
  • AZ alloys Mg—Al—Zn alloys, Zn: 0.2% to 1.5% by mass
  • AM alloys Mg—Al—Mn alloys, Mn: 0.15% to 0.5% by mass
  • Mg-Al-rare-earth element (RE) alloys Mg-Al-rare-earth element (RE) alloys
  • AX alloys Mg—Al—Ca alloys, Ca: 0.
  • Mg—Al alloys in which Al constitutes 7.3% by mass or more and 12% by mass or less are particularly preferred, more specifically, Mg—Al alloys in which Al constitutes 8.3% to 9.5% by mass and Zn constitutes 0.5% to 1.5% by mass, typically an AZ91 alloy, because of their high strength and corrosion resistance.
  • the metal substrate is typically a rolled member manufactured by rolling a cast member, a processed member manufactured by heat treatment, leveling process, or polishing processing, of the rolled member, or a plastic-worked member manufactured by plastic working, such as press forming, bending, or forging, of the rolled member or the processed member.
  • a metal substrate subjected to plastic working, such as rolling or press forming has a small crystal grain size, better mechanical characteristics, such as higher strength, than the cast member, less internal defects or surface defects, such as shrinkage cavities or pores, and a satisfactory surface texture.
  • the rolled member Since the rolled member has less surface defects than the cast member, use of the rolled member can reduce the number of or obviate the necessity for puttying operations of a defect (defect repair) before the formation of the covering layer. Furthermore, use of the rolled member can reduce the occurrence of defectives due to insufficient defect repair, thus contributing to an improved product yield.
  • the covering layer includes a region containing an insulating layer made of an insulating material and a region containing an electrodeposited layer having a different texture from the insulating layer and formed by electrodeposition coating or electroplating.
  • the insulating layer is made of a material that is resistant to the conditions for forming an electrodeposited layer described below. Since the electrodeposited layer is formed by electrodeposition coating or electroplating, the insulating layer is made of an alkali-resistant heat-resistant (preferably 160° C. or more, more preferably 180° C. or more) insulating material.
  • the material of the insulating layer may be an epoxy resin, an acrylic resin, or a urethane resin.
  • the color (such as colored or colorless, or transparent or opaque), thickness, and design of the insulating layer can be appropriately selected for each desired application.
  • the material of the insulating layer may contain an additive agent.
  • the tactile and visual textures of the insulating layer can be easily altered with the additive agent.
  • the additive agent is not particularly limited and may be electrically conductive or nonconductive, provided that the desired texture can be achieved.
  • the size or amount of the additive agent can be controlled to alter the tactile texture or the visual texture.
  • a metallic material such as Al, can be used as an additive agent to impart a shiny metallic texture to a rough surface region.
  • SiO 2 or polymer particles may be used as the additive agent to visually improve the matte metallic texture.
  • transparent additive agents are preferably used to improve the tactile texture.
  • the shape of the additive agent may be fibrous, flat, or particulate.
  • Al particles have an average particle size in the range of 0.5 to 50 ⁇ m
  • SiO 2 particles have an average particle size in the range of 0.2 to 50 ⁇ m.
  • the amount of Al to be added is preferably in the range of 1% to 30% by volume of the insulating layer
  • the amount of SiO 2 to be added is preferably in the range of 0.5% to 30% by volume of the insulating layer.
  • the insulating layer may have an anticorrosive layer facing the metal substrate.
  • the anticorrosive layer may be formed by anticorrosion treatment, such as chemical conversion treatment.
  • the anticorrosive layer can increase the adhesion between the insulating layer and the metal substrate.
  • the insulating layer may have a multilayer structure including the anticorrosive layer and another additional layer.
  • the electrodeposited layer is made of a material having a different texture from the insulating layer.
  • the texture includes a tactile texture and a visual texture, and one or both of the tactile texture and the visual texture may be different.
  • the material of the electrodeposited layer may be an epoxy resin, an acrylic resin, or a urethane resin.
  • the color (such as colored or colorless, or transparent or opaque), thickness, and design of the electrodeposited layer can be appropriately selected for each desired application.
  • the material of the electrodeposited layer may contain an additive agent.
  • the electrodeposited layer may have an anticorrosive layer facing the metal substrate.
  • the electrodeposited layer is formed by electrodeposition coating or electroplating. This formation method will be described in detail later.
  • FIG. 1 is an enlarged view of a portion of a cross section of a metal member according to the present invention.
  • an insulating layer 21 made of an insulating material is formed on the entire surface of a metal substrate 10 .
  • the insulating layer 21 may be formed by a known method, such as spray coating, electrodeposition coating, or electrostatic coating.
  • a portion of the insulating layer 21 is removed to form an exposed portion 30 of the metal substrate 10 where the metal substrate 10 is exposed on a surface.
  • the portion of the insulating layer 21 may be removed by a chemical or physical method.
  • the chemical removal method may be a method using a high-temperature alkaline (hot alkaline) aqueous solution. In this case, a region to be removed is immersed in the aqueous hot alkaline solution. Thus, the removal of a fine region may require the masking of a region that is not removed.
  • Examples of the physical removal method include diamond cutting, laser irradiation processing, and sandblasting. In particular, laser irradiation can completely remove a fine region or a corner region.
  • a portion of the insulating layer 21 to be removed by the method includes a continuous region or discontinuous regions. In FIG. 1 , a portion of the insulating layer on a corner region of the metal substrate 10 is removed.
  • a paint having a different texture from the insulating layer 21 is applied to the exposed portion 30 by electrodeposition coating or electroplating to form an electrodeposited layer 22 . Since an electric current flows through the exposed portion 30 during the paint application, the electrodeposited layer 22 can be easily and selectively formed on the portion of the metal substrate 10 without using a mask.
  • a metal member 1 can be manufactured that includes a covering layer 20 formed of the insulating layer 21 and the electrodeposited layer 22 on the surface of the metal substrate 10 .
  • a metal member according to an embodiment of the present invention will be further described below.
  • a metal member according to a first embodiment includes tactually and visually different surface regions. Each of the regions has a tactile metallic texture that conforms to its visual metallic texture.
  • the entire surface of a metal substrate made of a magnesium alloy is coated with a colorless transparent epoxy resin.
  • a colorless transparent acrylic resin containing an additive agent that contains Al (having an average particle size of 10 ⁇ m) and SiO 2 (having an average particle size of 2 ⁇ m) at a ratio of 1:1 is formed on the colorless transparent epoxy resin, thus forming an insulating layer formed of these two resin layers.
  • the resin layers may be formed by any method.
  • a portion of the insulating layer, which is a corner region thereof, is subjected to diamond cutting to form a finished surface portion on an exposed portion of the metal substrate where the surface of the metal substrate is exposed.
  • the finished surface portion is mirror-finished and is shiny, flat and smooth.
  • the exposed portion is coated with a colorless transparent acrylic resin by electrodeposition coating to form an electrodeposited layer.
  • the electrodeposited layer is made of the transparent resin disposed on the mirror-finished surface portion, the shiny metallic texture of the finished surface portion can be seen through the transparent resin. This can significantly improve the metallic texture of the corner region of the metal member. Furthermore, since the transparent resin is flat and smooth, the electrodeposited layer can have a flat and smooth texture that visually and tactually conforms to the mirror-finished surface portion.
  • the insulating layer is made of a resin containing the Al and SiO 2 additive agent, the insulating layer can have both a shiny metallic texture and a matte metallic texture. The insulating layer can also visually have the texture of asperities (matte metallic texture) due to the additive agent together with the tactile texture of the asperities.
  • the metal member includes tactually and visually different surface regions. Each of the regions has a tactile metallic texture that conforms to its visual metallic texture. This can significantly improve the metallic texture of a desired region.
  • a metal member according to a second embodiment has substantially the same visual texture over its entire surface and includes regions having different tactile textures.
  • the insulating layer and the electrodeposited layer are made of a colorless transparent acrylic resin containing a transparent SiO 2 (having an average particle size of 1 ⁇ m) additive agent.
  • the insulating layer and the electrodeposited layer have different additive agent contents.
  • the additive agent content of the insulating layer is higher than the additive agent content of the electrodeposited layer. Since a high additive agent content results in a high degree of asperities, the electrodeposited layer and the insulating layer can have different tactual textures.
  • a portion of the insulating layer is removed by a method that does not substantially alter the surface texture of the exposed portion of the metal substrate.
  • the entire surface of the metal substrate visually has the same metallic texture. Since the surface of the metal substrate can be seen through the covering layer made of a colorless transparent resin, the metal member according to the present embodiment has substantially the same visual texture. Thus, the metal member has a tactile texture that depends on the surface texture of the covering layer and a visual texture that depends on the visual surface texture of the metal substrate. The metal member can have tactually different surface textures.
  • a metal member according to a third embodiment has letters or a pattern on its surface.
  • the insulating layer and the electrodeposited layer are made of an opaque colored resin.
  • the insulating layer and the electrodeposited layer have different colors.
  • an insulating layer made of a black resin is formed on the entire surface of a metal substrate.
  • a portion of the insulating layer is irradiated with a laser beam in a desired letter or pattern shape to form an exposed surface portion of the metal substrate where the surface of the metal substrate is exposed.
  • the exposed portion is coated with a red resin by electrodeposition coating to form an electrodeposited layer.
  • the electrodeposited layer and the insulating layer have different visual textures to draw red letters or a red pattern on the black background, thereby enhancing the commercial value of the metal member.
  • the outlines of letters or a pattern can be clearly drawn by easily removing a fine portion of the insulating layer using a laser beam.
  • the insulating layer may be removed by a method that affects the surface texture of the exposed portion of the metal substrate or a method that does not substantially alter the surface texture of the exposed portion of the metal substrate. This is because the visual texture of the metal member according to the present embodiment also depends on the visual surface texture of the covering layer.
  • the present embodiment has focused on only different visual textures caused by the use of different-colored materials of the insulating layer and the electrodeposited layer, the insulating layer and the electrodeposited layer may also have different tactile textures by the addition of an additive agent to a colored resin.
  • a metal member according to a fourth embodiment visually has a shiny metallic texture in a rough surface region and includes regions having different gloss levels.
  • the insulating layer and the electrodeposited layer are made of a colorless transparent acrylic resin containing an Al additive agent (having an average particle size of 10 ⁇ m).
  • the insulating layer and the electrodeposited layer have different additive agent contents.
  • the additive agent content of the insulating layer is higher than the additive agent content of the electrodeposited layer. Since a high additive agent content results in the shiny metallic texture of a deep color tone, the electrodeposited layer and the insulating layer can visually have the shiny metallic texture of different color tones. Since a high additive agent content results in a high degree of asperities, the electrodeposited layer and the insulating layer can also have different tactual textures.
  • the insulating layer in the removing step, may be removed by a method that affects the surface texture of the exposed portion of the metal substrate or a method that does not substantially alter the surface texture of the exposed portion of the metal substrate.
  • the tactile texture and the visual texture of the metal member in the present embodiment depend on the tactile texture and the visual texture of the surface of the covering layer.
  • the metal member can have tactually and visually different surface textures.
  • a metal member that included a metal substrate made of an AZ91-equivalent magnesium alloy and a covering layer disposed on the metal substrate was manufactured, and its appearance was examined.
  • the entire surface of a metal substrate (size: approximately 90 mm ⁇ 60 mm ⁇ 3 mm) was subjected to chemical conversion treatment.
  • An epoxy resin was applied to the treated metal substrate by spray coating to form a primer layer (having a thickness of 10 ⁇ m).
  • An acrylic resin containing an additive agent that contained Al (having an average particle size of 10 ⁇ m) and SiO 2 (having an average particle size of 1 ⁇ m) at a ratio of 1:1 was applied to the epoxy resin by spray coating to complete an insulating layer (having a thickness of 15 ⁇ m).
  • the insulating layer has a multilayer structure.
  • a corner region of the insulating layer was chamfered by diamond cutting to form an exposed surface portion of the metal substrate where the metal substrate is exposed on a surface as a portion of the insulating layer.
  • a transparent acrylic resin was applied to the exposed portion by electrodeposition coating to form an electrodeposited layer (having a thickness of 15 ⁇ m).
  • the metal member that included a covering layer formed of the insulating layer and the electrodeposited layer on the metal substrate) thus manufactured was referred to as a sample 1.
  • the entire surface of the same metal substrate as in the sample 1 was subjected to sandblasting to form asperities.
  • a corner region of the metal substrate having surface asperities was chamfered by diamond cutting.
  • a transparent acrylic silicon resin was applied to the entire surface of the metal substrate by spray coating to form a covering layer (having a thickness of 15 ⁇ m).
  • the metal member thus manufactured was referred to as a sample 2.
  • the entire surface of the same metal substrate as in the sample 1 was subjected to sandblasting to form asperities.
  • a corner region of the metal substrate having surface asperities was subjected to diamond cutting.
  • An acrylic resin containing 3% by volume transparent SiO 2 (having an average particle size of 1 ⁇ m) additive agent was applied to the entire surface of the metal substrate by electrodeposition coating to form a covering layer (having a thickness of 15 ⁇ m).
  • the metal member thus manufactured was referred to as a sample 3.
  • the sample 1 visually had a shiny metallic texture and a matte metallic texture in a region other than the corner region of the metal member. Only the chamfered corner region had a markedly shiny, flat and smooth metallic texture.
  • the sample 1 tactually had the texture of asperities due to the additive agent contained in the material of the insulating layer.
  • the chamfered corner region had a flat and smooth texture.
  • the chamfered corner region and the other region of the metal member of the sample 1 had different textures, and each of the regions had a visual metallic texture that conforms to its tactile metallic texture.
  • the metal substrate has a flat and smooth surface of a covering layer that is coated uniformly.
  • the metal member could not include regions having different surface textures.
  • the rough metal substrate could be seen through the transparent covering layer.
  • the sample 2 had a visual texture due to the asperities of the metal substrate.
  • the sample 2 had a tactually flat and smooth texture and could not have a visual metallic texture that conforms to its tactile metallic texture.
  • the sample 3 had a visually and tactually matte metallic texture because of the uniformly rough covering layer. Because of the entirely uniform surface of the metal member, the sample 3 could not had the metallic texture of the metal substrate.
  • a metal member according to the present invention that includes a covering layer on a metal substrate includes surface regions having different visual or tactile textures, and each of the regions has a visual metallic texture that conforms to its tactile metallic texture.
  • the metal member has a high quality appearance, a very high metallic texture, and a high commercial value.
  • a metal member according to the present invention can be suitably used as a housing for portable electrical equipment. Furthermore, a method for manufacturing a metal member according to the present invention can be suitably used to manufacture the metal member according to the present invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
US14/006,885 2011-03-22 2012-03-07 Metal member and method of manufacturing same Abandoned US20140008232A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011-063323 2011-03-22
JP2011063323A JP2012197498A (ja) 2011-03-22 2011-03-22 金属部材及びその製造方法
PCT/JP2012/055848 WO2012128046A1 (ja) 2011-03-22 2012-03-07 金属部材及びその製造方法

Publications (1)

Publication Number Publication Date
US20140008232A1 true US20140008232A1 (en) 2014-01-09

Family

ID=46879201

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/006,885 Abandoned US20140008232A1 (en) 2011-03-22 2012-03-07 Metal member and method of manufacturing same

Country Status (7)

Country Link
US (1) US20140008232A1 (zh)
EP (1) EP2690203B1 (zh)
JP (1) JP2012197498A (zh)
KR (1) KR101658273B1 (zh)
CN (1) CN103443336B (zh)
TW (1) TWI545008B (zh)
WO (1) WO2012128046A1 (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160330852A1 (en) * 2012-05-29 2016-11-10 Apple Inc. Double anodized parts
CN107415145A (zh) * 2017-07-20 2017-12-01 宁波信泰机械有限公司 一种双色表面处理的产品结构
GB2560242A (en) * 2017-01-19 2018-09-05 Gedia Gebruder Dingerkus Gmbh Method of preparing sheet metal for coating
US10275365B1 (en) * 2016-03-21 2019-04-30 Apple Inc. Cryptographic signatures for capability-based addressing
WO2020226645A1 (en) * 2019-05-09 2020-11-12 Hewlett-Packard Development Company, L.P. Water-based anti-corrosion cutting fluid for electronic device housings
EP3948478A4 (en) * 2019-03-28 2022-11-02 Hewlett-Packard Development Company, L.P. COVERS FOR ELECTRONIC DEVICES
US11920244B2 (en) 2018-07-24 2024-03-05 Hewlett-Packard Development Company, L.P. Device housing with metallic luster

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5275828B2 (ja) * 2009-01-19 2013-08-28 旭テック株式会社 金属加工物および金属加工物の加工方法
CN103972687A (zh) * 2014-05-13 2014-08-06 富创科技(深圳)有限公司 电镀金属线及其电镀方法
CN104411136B (zh) * 2014-10-28 2018-07-06 广东欧珀移动通信有限公司 移动终端壳体、移动终端和移动终端壳体的制造方法
CN104480512B (zh) * 2014-12-26 2017-07-25 广东欧珀移动通信有限公司 产品壳体、移动终端和产品壳体的生产方法
CN107079599B (zh) * 2015-01-28 2019-12-31 惠普发展公司，有限责任合伙企业 经氧化且涂覆的物品及其制备方法
CN110248753B (zh) * 2017-02-01 2021-08-31 住友电气工业株式会社 镁合金构件
CN108666484A (zh) * 2017-03-29 2018-10-16 孚能科技（赣州）有限公司 电池外壳及其制备方法和电池模组
DE102018218265A1 (de) * 2018-10-25 2020-04-30 MTU Aero Engines AG Verfahren zum Herstellen einer Spitzenpanzerung an einer Laufschaufel einer Strömungsmaschine
WO2021151232A1 (en) * 2020-01-30 2021-08-05 Hewlett-Packard Development Company, L.P. Electronic device housings with chamfered edges

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070034112A1 (en) * 2003-10-28 2007-02-15 Dasf Aktiengesellschaft Luster pigments having a pronounced glittering effect
US20100085690A1 (en) * 2008-10-08 2010-04-08 Shenzhen Futaihong Precision Industry Co., Ltd. Device housing with decorative pattern and method of manufacturing same
WO2010090048A1 (ja) * 2009-02-09 2010-08-12 三菱エンジニアリングプラスチックス株式会社 ポリカーボネート樹脂組成物及びその成形体
WO2010103971A1 (ja) * 2009-03-12 2010-09-16 住友電気工業株式会社 マグネシウム合金部材
US20110048754A1 (en) * 2009-09-03 2011-03-03 Shenzhen Futaihong Precision Industry Co., Ltd. Housing for electronic device and method for making the same

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4629364B1 (zh) * 1968-09-27 1971-08-26
US3963568A (en) * 1973-05-30 1976-06-15 Kansai Paint Company, Ltd. Process for coating aluminum or aluminum alloy
FR2521175B1 (fr) * 1982-02-08 1986-05-02 Dupont S T Procede pour la realisation sur un objet d'un decor presentant des parties apparentes en au moins deux materiaux differents
ES8607426A1 (es) * 1984-11-28 1986-06-16 Kawasaki Steel Co Mejoras y procedimiento para la fabricacion de flejes de acero plaqueados compuestos con alta resistencia a la corro-sion
JPS63293196A (ja) * 1987-05-26 1988-11-30 Kawai Kako:Kk 金属の表面処理方法
JPH0197698A (ja) * 1987-10-09 1989-04-17 Kayo Giken Kogyo Kk 印刷物及びその製造方法
JP2578167B2 (ja) * 1988-06-01 1997-02-05 華陽技研工業株式会社 装飾板とその製造方法
JPH04276096A (ja) * 1991-03-04 1992-10-01 Canon Inc 文字，模様の形成方法
CA2296539A1 (en) * 1997-07-11 1999-01-21 Magnesium Technology Limited Sealing procedures for metal and/or anodised metal substrates
JP2001131793A (ja) * 1999-11-09 2001-05-15 Kayoh Technical Industry Co Ltd 装飾品の製造方法
JP2007239057A (ja) * 2006-03-10 2007-09-20 Magnes:Kk 部分着色マグネシウム体、その製造方法、およびその中間体
CN101293460B (zh) * 2007-04-24 2011-08-17 比亚迪股份有限公司 一种轻金属材料的表面装饰方法
CN101365305A (zh) * 2007-08-07 2009-02-11 鸿富锦精密工业（深圳）有限公司 便携式电子装置外壳及其制备方法
JP5092702B2 (ja) 2007-11-12 2012-12-05 住友電気工業株式会社 マグネシウム合金部材
JP2009132974A (ja) * 2007-11-30 2009-06-18 Fujifilm Corp 微細構造体

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070034112A1 (en) * 2003-10-28 2007-02-15 Dasf Aktiengesellschaft Luster pigments having a pronounced glittering effect
US20100085690A1 (en) * 2008-10-08 2010-04-08 Shenzhen Futaihong Precision Industry Co., Ltd. Device housing with decorative pattern and method of manufacturing same
WO2010090048A1 (ja) * 2009-02-09 2010-08-12 三菱エンジニアリングプラスチックス株式会社 ポリカーボネート樹脂組成物及びその成形体
US20110245388A1 (en) * 2009-02-09 2011-10-06 Mitsubishi Engineering-Plastics Corporation Polycarbonate resin composition and formed product thereof
WO2010103971A1 (ja) * 2009-03-12 2010-09-16 住友電気工業株式会社 マグネシウム合金部材
US20110318603A1 (en) * 2009-03-12 2011-12-29 Sumitomo Electric Industries, Ltd. Magnesium alloy member
US20110048754A1 (en) * 2009-09-03 2011-03-03 Shenzhen Futaihong Precision Industry Co., Ltd. Housing for electronic device and method for making the same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160330852A1 (en) * 2012-05-29 2016-11-10 Apple Inc. Double anodized parts
US11240928B2 (en) 2012-05-29 2022-02-01 Apple Inc. Components of an electronic device and methods for their assembly
US11540408B2 (en) * 2012-05-29 2022-12-27 Apple Inc. Double anodized parts
US11653466B2 (en) 2012-05-29 2023-05-16 Apple Inc. Components of an electronic device and methods for their assembly
US10275365B1 (en) * 2016-03-21 2019-04-30 Apple Inc. Cryptographic signatures for capability-based addressing
GB2560242A (en) * 2017-01-19 2018-09-05 Gedia Gebruder Dingerkus Gmbh Method of preparing sheet metal for coating
CN107415145A (zh) * 2017-07-20 2017-12-01 宁波信泰机械有限公司 一种双色表面处理的产品结构
US11920244B2 (en) 2018-07-24 2024-03-05 Hewlett-Packard Development Company, L.P. Device housing with metallic luster
EP3948478A4 (en) * 2019-03-28 2022-11-02 Hewlett-Packard Development Company, L.P. COVERS FOR ELECTRONIC DEVICES
WO2020226645A1 (en) * 2019-05-09 2020-11-12 Hewlett-Packard Development Company, L.P. Water-based anti-corrosion cutting fluid for electronic device housings

Also Published As

Publication number Publication date
EP2690203A4 (en) 2014-09-03
EP2690203B1 (en) 2016-09-14
KR20130124389A (ko) 2013-11-13
TW201302453A (zh) 2013-01-16
WO2012128046A1 (ja) 2012-09-27
TWI545008B (zh) 2016-08-11
CN103443336A (zh) 2013-12-11
EP2690203A1 (en) 2014-01-29
KR101658273B1 (ko) 2016-09-22
CN103443336B (zh) 2016-06-08
JP2012197498A (ja) 2012-10-18

Similar Documents

Publication Publication Date Title
EP2690203B1 (en) Metal member and method for manufacturing same
CN1225563C (zh) 具有金色外观的铜合金
CN103732804B (zh) 阳极化和镀覆表面处理
JP4927742B2 (ja) 電気めっきされた外観が銀白色のコイン
JP2009120877A (ja) マグネシウム合金部材
CN111699282B (zh) 锌类电镀钢板
MX2012004893A (es) Miembro prensado en caliente y metodo para la produccion del mismo.
WO2010079534A1 (ja) マグネシウム合金部材
JP2017218647A (ja) 線状模様を有する溶融Ｚｎ系めっき鋼板
JPWO2018230716A1 (ja) めっき鋼材
JP6540930B1 (ja) 亜鉛系電気めっき鋼板
KR102178027B1 (ko) 도금된 알루미늄 또는 알루미늄 합금제의 슬라이드 파스너 또는 버튼의 부재
KR20060073941A (ko) 마그네슘 또는 마그네슘 합금으로 이루어진 제품 및 이의제조방법
JP6092689B2 (ja) 表面処理金属材及びそれを用いたコネクタ、端子、積層板、シールドテープ、シールド材、プリント配線板、プリント回路板、金属加工部材の製造方法、及び、電子機器の製造方法
KR20140106196A (ko) 입체적 다층도금에 의한 복합 표면 처리 방법 및 그에 따른 입체적 복합 표면 처리 구조
JP5935083B2 (ja) アルミニウム合金成形品及びその製造方法
KR102566779B1 (ko) 아연계 도금 강판
JP2004332002A (ja) 透明潤滑樹脂被覆陽極酸化処理板
KR20200105701A (ko) 용기용 강판 및 용기용 강판의 제조 방법
JPS6340865B2 (zh)
JP2014198882A (ja) 表面処理金属材及びそれを用いたコネクタ、端子、積層板、シールドテープ、シールド材、プリント配線板、プリント回路板、金属加工部材、及び、電子機器
RU219436U1 (ru) Заготовка для изготовления монеты
CN202543356U (zh) 壳体
TWI496680B (zh) 鎂合金構件
JP6146402B2 (ja) 容器用鋼板

Legal Events

Date Code Title Description
AS Assignment

Owner name: SUMITOMO ELECTRIC INDUSTRIES, LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MIZUNO, OSAMU;NUMANO, MASATADA;INOKUCHI, KOHJI;REEL/FRAME:031260/0692

Effective date: 20130829

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION