EP3299493B1 - Beschichtungsstruktur, laufrad, verdichter, metallteilherstellungsverfahren, laufradherstellungsverfahren und verdichterherstellungsverfahren - Google Patents

Beschichtungsstruktur, laufrad, verdichter, metallteilherstellungsverfahren, laufradherstellungsverfahren und verdichterherstellungsverfahren Download PDF

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Publication number
EP3299493B1
EP3299493B1 EP15905444.4A EP15905444A EP3299493B1 EP 3299493 B1 EP3299493 B1 EP 3299493B1 EP 15905444 A EP15905444 A EP 15905444A EP 3299493 B1 EP3299493 B1 EP 3299493B1
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EP
European Patent Office
Prior art keywords
magnesium
phosphate
impeller
base material
zinc
Prior art date
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EP15905444.4A
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English (en)
French (fr)
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EP3299493A1 (de
EP3299493A4 (de
Inventor
Takashi Nambu
Byeongil An
Takashi Arai
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Mitsubishi Heavy Industries Engine and Turbocharger Ltd
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Mitsubishi Heavy Industries Engine and Turbocharger Ltd
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    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/48—Coating with alloys
    • C23C18/50—Coating with alloys with alloys based on iron, cobalt or nickel
    • 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
    • C23C22/05—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 aqueous solutions
    • C23C22/06—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 aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—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 aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C23C22/18—Orthophosphates containing manganese cations
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1646—Characteristics of the product obtained
    • C23C18/165—Multilayered product
    • C23C18/1651—Two or more layers only obtained by electroless plating
    • 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
    • C23C22/05—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 aqueous solutions
    • C23C22/06—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 aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—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 aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • 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
    • C23C22/05—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 aqueous solutions
    • C23C22/06—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 aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—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 aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C23C22/12—Orthophosphates containing zinc cations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/90—Coating; Surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/95—Preventing corrosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/12—Light metals
    • F05D2300/125—Magnesium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics
    • F05D2300/2108—Phosphor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/611—Coating

Definitions

  • the present invention relates to a coating structure, an impeller, a compressor, a metal part manufacturing method, an impeller manufacturing method, and a compressor manufacturing method.
  • the material of the members has been switched from an aluminum alloy to a magnesium alloy.
  • the members are formed of a magnesium alloy
  • the amount of corrosion increases compared to a case where the member are formed of an aluminum alloy. Therefore, in order to enhance corrosion resistance of a base material made of a magnesium alloy, a surface of the base material is covered by performing chemical conversion treatment or the like. Moreover, the surface of the base material is sometimes coated with a resin.
  • PTL1 discloses a configuration in which a base material made of a magnesium alloy is subjected to nickel-based plating. When a surface is subjected to plating, compared to the chemical conversion treatment or the resin coating, higher corrosion resistance can be acquired.
  • pretreatment such as chemical etching is performed before the base material is subjected to the nickel-based plating treatment.
  • pretreatment such as chemical etching is performed.
  • Such pretreatment is performed in order to enhance adhesion between a base material and a plating film.
  • JP H05 271996 A relates to a magnesium alloy material improved in the adhesiveness thereof to a nickel containing plated layer.
  • JP 2006 233245 A suggests a method for producing a product composed of magnesium or a magnesium alloy, whereby an anodized film or a conversion-treated film is formed on a surface of a base material composed of magnesium or a magnesium alloy.
  • JP 2011 012293 A relates to a plating method for magnesium or a magnesium alloy thah includes a step of forming an electroconductive resin layer containing an electroconductive filler other than a metal on a magnesium or magnesium alloy substrate, prior to a plating step.
  • the composition of the magnesium alloy is changed by adding an additive, or the like.
  • an additive or the like.
  • pretreatement such as chemical etching
  • An object of the present invention is to provide a coating structure in which adhesion between a base material made of a magnesium alloy and a plating layer made of a nickel-based alloy is enhanced so that high corrosion resistance and erosion resistance can be acquired, and reliability can be improved, an impeller, a compressor, a metal part manufacturing method, an impeller manufacturing method, and a compressor manufacturing method.
  • a coating structure including a chemical conversion layer that is made of a phosphate-coated film and is formed in a manner of covering a surface of a base material which is made of a magnesium alloy containing magnesium as a main component.
  • the coating structure also includes a plating layer that is made of a nickel-based alloy and is formed in a manner of covering the chemical conversion layer.
  • the plating layer made of the nickel-based alloy more favorably comes into tight contact with the chemical conversion layer made of the phosphate-coated film. Therefore, reliability can be improved. When there is provided such a plating layer, high corrosion resistance and erosion resistance can be acquired.
  • the plating layer of the coating structure in the first aspect is formed of a nickel-phosphorous alloy.
  • the base material of the coating structure in the first aspect contains a atom percent of zinc and contains b atom percent of at least one kind of element, in total, selected from a group consisting of gadolinium, terbium, thulium, and lutetium.
  • a remaining portion is made of magnesium, and the factors a and b satisfy the following expressions (1) to (3).
  • the base material has at least one kind of precipitate selected from a precipitate group consisting of a compound of magnesium and a rare earth element, a compound of magnesium and zinc, a compound of zinc and a rare earth element, and a compound of magnesium, zinc, and a rare earth element.
  • the adhesion deteriorates.
  • the chemical conversion layer is interposed by means of chemical conversion treatment, adhesion between the base material and the plating layer can be effectively enhanced, so that reliability can be improved.
  • corrosion resistance can be improved by means of the chemical conversion treated layer.
  • corrosion resistance and erosion resistance can also be improved by means of the plating layer.
  • an impeller includes the coating structure according to the first aspect.
  • a compressor includes the impeller according to the second aspect.
  • the impeller in a case where the impeller is formed of a magnesium alloy, the impeller weighs light, and an operation response of the compressor employing the impeller can be effectively enhanced.
  • a metal part manufacturing method including a step of forming a chemical conversion layer by performing chemical conversion treatment in a manner of covering a surface of a base material which is made of a magnesium alloy containing magnesium as a main component.
  • the metal part manufacturing method also includes a step of forming a plating layer which is made of a nickel-based alloy in a manner of covering the chemical conversion layer.
  • the plating layer made of the nickel-based alloy favorably comes into tight contact with the base material. Therefore, reliability can be improved. Moreover, when there is provided the plating layer, high corrosion resistance and erosion resistance can be acquired.
  • an impeller manufacturing method includes the metal part manufacturing method according to the fourth aspect.
  • a compressor manufacturing method includes the impeller manufacturing method according to the fifth aspect.
  • the impeller can weigh light, so that an operation response of the compressor employing the impeller can be effectively enhanced.
  • adhesion between the base material made of the magnesium alloy and the plating layer made of the nickel-based alloy is enhanced so that high corrosion resistance and erosion resistance can be acquired and reliability can be improved.
  • Fig. 1 is a view illustrating a schematic configuration of a compressor according to an embodiment of the present invention.
  • the compressor of the embodiment is a centrifugal compressor which is provided in a turbocharger turbo-charging an internal combustion engine.
  • a compressor 1 employed in an engine compresses a fluid AR sent into a housing 2 when an impeller (metal part) 3 rotates inside the housing 2.
  • an impeller (metal part) 3 rotates inside the housing 2.
  • the shape of the impeller 3 or the configuration of the compressor 1 is not limited in any way.
  • the impeller 3 is disposed inside the housing 2 and compresses the fluid AR such as gas which becomes a compression subject.
  • the impeller 3 is integrally provided with a rotary shaft 4 which is rotatably supported by a bearing 6 provided inside the housing 2.
  • the rotary shaft 4 is rotatively driven around the central axis thereof by a turbine 5 which rotates due to exhaust gas G. Accordingly, the impeller 3 rotates together with the rotary shaft 4 and compresses the fluid AR flowing inside the housing 2.
  • the compressor 1 of the embodiment is embedded in a system which performs exhaust gas recirculation (EGR), and there are cases where air including exhaust gas which contains condensed moisture is taken in.
  • EGR exhaust gas recirculation
  • Fig. 2 is a view illustrating a cross-sectional view of a coating structure according to the embodiment of the present invention.
  • Fig. 3 is a flow of an impeller manufacturing method according to the embodiment of the present invention.
  • the impeller 3 includes an impeller body (base material) 10, a chemical conversion layer 11, and a plating layer 12.
  • a step of forming an impeller body 10 is performed (Step S01).
  • a step of forming a chemical conversion layer 11 is performed (Step S02), and then a step of forming a plating layer 12 is performed (Step S03).
  • the impeller body 10 is made of a magnesium alloy.
  • the magnesium alloy forming the impeller body 10 contains zinc (Zn) and at least one kind of element selected from a group consisting of gadolinium (Gd), terbium (Tb), thulium (Tm), and lutetium (Lu), and the remaining portion is made of magnesium (Mg).
  • a content a (atom percent) of zinc (Zn) is set to 0.2 ⁇ a ⁇ 3.0.
  • a content b (atom percent) of at least one kind of element selected from the group consisting of gadolinium (Gd), terbium (Tb), thulium (Tm), and lutetium (Lu) is set to 0.5 ⁇ b ⁇ 5.0.
  • Gd gadolinium
  • Tb terbium
  • Tm thulium
  • Lu lutetium
  • the upper limit content is less than 3 atom percent.
  • the ratio of the content of gadolinium (Gd) and the content zinc (Zn) is 2:1 or a ratio close thereto.
  • a magnesium alloy made of the above-described composition is caused to melt and is cast into a mold, thereby forming a magnesium alloy cast.
  • a precipitate group consisting of a compound of magnesium (Mg) and a rare earth element, a compound of magnesium (Mg) and zinc (Zn), a compound of zinc (Zn) and a rare earth element, and a compound of magnesium (Mg), zinc (Zn), and a rare earth element is precipitated.
  • the magnesium alloy cast is subjected to solution heat treatment.
  • solution heat treatment at least one kind of precipitate described above remains.
  • the magnesium alloy cast is subjected to machining, thereby acquiring the impeller body 10 having a predetermined shape.
  • machining it is possible to employ processing accompanying plastic deformation, such as extruding, an equal-channel-angular-extrusion (ECAE) processing method, rolling, drawing, forging, repetitive processing thereof, and friction stir welding (FSW).
  • processing accompanying plastic deformation such as extruding, an equal-channel-angular-extrusion (ECAE) processing method, rolling, drawing, forging, repetitive processing thereof, and friction stir welding (FSW).
  • ECAE equal-channel-angular-extrusion
  • FSW friction stir welding
  • the plastic processing can be performed alone or in combination of rolling, extruding, ECAE, drawing processing, and forging.
  • the chemical conversion layer 11 is formed in a manner of covering a surface of the impeller body 10.
  • the chemical conversion layer 11 is made of a phosphate-coated film.
  • the phosphate-coated film is made of phosphate such as iron phosphate, manganese phosphate, and zinc phosphate. Such a phosphate-coated film is formed after the impeller body 10 is washed, and the impeller body 10 which becomes the base material is immersed in an aqueous solution containing phosphate for a predetermined time.
  • the chemical conversion layer 11 made of a phosphate-coated film may be formed to be thick such that the chemical conversion layer 11 can completely cover the unevenness.
  • the film thickness of the chemical conversion layer 11 made of such a phosphate-coated film is excessively thick, the weight thereof increases, thereby adversely affecting the response while the impeller 3 rotates.
  • the chemical conversion layer 11 made of a phosphate-coated film has a film thickness ranging from 0.5 ⁇ m to 5 ⁇ m, and more preferably ranging from 2 ⁇ m to 5 ⁇ m.
  • Such a chemical conversion layer 11 may be formed by repeating the treatment of forming a phosphate-coated film multiple times and laminating multiple layers of phosphate-coated films.
  • the plating layer 12 is formed in a manner of covering the chemical conversion layer 11.
  • the plating layer 12 is a plating film made of a nickel-based alloy which is formed by performing electroless plating treatment.
  • the nickel-based alloy forming the plating layer 12 is a nickel-phosphorous alloy.
  • the plating layer 12 made of the nickel-phosphorous alloy is formed to have a film thickness ranging from 10 ⁇ m to 30 ⁇ m, and more preferably ranging from 15 ⁇ m to 30 ⁇ m.
  • the plating layer 12 made of such a nickel-based alloy is formed by causing the impeller body 10 which is the base material having the chemical conversion layer 11 formed on the surface thereof to be immersed in a plating solution for a predetermined time and to be subjected to electroless plating.
  • the embodiment described above includes the chemical conversion layer 11 that is formed by performing chemical conversion treatment in a manner of covering a surface of the impeller body 10 which is made of a magnesium alloy, and the plating layer 12 that has a film thickness within a range set in advance and is formed in a manner of covering the chemical conversion layer 11. According to the configuration, the plating layer 12 more favorably comes into tight contact with the chemical conversion layer 11. When there is provided such a plating layer 12, it is possible to have high corrosion resistance.
  • the impeller 3 is formed of a magnesium alloy, so that it is possible to have high adhesion and corrosion resistance, and to enhance an operation response of the impeller 3 and the compressor 1.
  • the chemical conversion layer 11 is a phosphate-coated film
  • the plating layer 12 is formed of a nickel-phosphorous alloy.
  • adhesion between the magnesium alloy and the plating layer 12 can be particularly and effectively enhanced.
  • the impeller body 10 contains zinc (Zn) and at least one kind of element selected from the group consisting of gadolinium (Gd), terbium (Tb), thulium (Tm), and lutetium (Lu), and the remaining portion is made of magnesium (Mg).
  • the impeller body 10 has at least one kind of precipitate selected from the precipitate group consisting of a compound of magnesium (Mg) and a rare earth element, a compound of magnesium (Mg) and zinc (Zn), a compound of zinc (Zn) and a rare earth element, and a compound of magnesium (Mg), zinc (Zn), and a rare earth element.
  • the corrosion resistance deteriorates.
  • adhesion between the impeller body 10 and the plating layer 12 can be effectively enhanced.
  • a magnesium alloy which contained 2 atom percent of Gd and 1 atom percent of Zn and of which the remaining portion thereof was made of Mg and unavoidable impurities was put into a vacuum melting furnace, and melting was performed.
  • plating was executed by means of a nickel-phosphorous alloy.
  • the base material was immersed in a phosphate treatment solution for a predetermined time, thereby obtaining a phosphate-coated film having a film thickness of 3 ⁇ m.
  • plating treatment was executed by employing a plating bath. Accordingly, a plating layer having a film thickness of 15 ⁇ m was obtained.
  • a base material was used as a test piece without executing surface treatment for the base material.
  • Resin coating was executed for a base material.
  • a Si-based resin was employed for resin coating, and a resin coat layer was formed on a surface of the base material by performing painting.
  • Table 1 shows the result thereof.
  • Coating Film adhesion Corrosion resistance erosion Example 1 Phosphate-coated film + Ni-P alloy plating ⁇ ⁇ ⁇ Comparative Example 1 None - ⁇ ⁇ Comparative Example 2 Phosphate-coated film ⁇ ⁇ ⁇ Comparative Example 3 Resin coating ⁇ ⁇ ⁇ Comparative Example 4 Phosphate-coated film + resin coating ⁇ ⁇ ⁇ Comparative Example 5 Plating by means of Ni-P alloy ⁇ ⁇ - Comparative Example 6 Resin coating + plating by means of Ni-P alloy ⁇ - - -
  • Example 1 As a result, in Example 1 and Comparative Examples 2 to 5, a film was formed in each of the base materials by performing the surface treatment.
  • Example 1 and Comparative Examples 1 to 5 in which the films were favorably formed a salt spray test was performed based on a salt spray cycle test conforming to "H 8502" in Japanese Industrial Standard, thereby verifying the corrosion resistance.
  • Example 1 In each of Example 1 and Comparative Examples 1 to 5, evaluation after the salt spray test was carried out by visually observing the circumstances of corrosion failure which occurred on the surface of the test piece, and measuring and checking a corrosion weight loss.
  • Example 1 As a result, as shown in Table 1, in Example 1, an occurrence of corrosion was not particularly recognized.
  • Comparative Example 1 in which a bare base material was employed, corrosion was recognized in its entirety. Moreover, in Comparative Example 2 in which only a phosphate-coated film was provided, an amount of corrosion more than that in Comparative Example 1 was checked. Also in Comparative Example 3 in which only resin coating was employed, an amount of corrosion more than that in Comparative Example 1 was checked.
  • Example 1 and Comparative Examples 1 to 4 in which peeling of the film due to the salt spray test was not recognized an erosion resistance test was performed by putting water droplets into an inlet of the compressor, and while the quantity of water droplets was controlled, the presence or absence of an occurrence of erosion was verified.
  • Example 1 In each of Example 1 and Comparative Examples 1 to 4, the evaluation of the presence or absence of an occurrence of erosion was carried out by visually checking the surface of the test piece.
  • Example 1 As a result, as shown in Table 1, no occurrence of erosion was recognized in Example 1.
  • Example 1 in which a phosphate-coated film and a plating layer by means of a Ni-P alloy were provided, it was checked that the adhesion, the corrosion resistance, and the erosion resistance of the film were high.
  • the present invention is not limited to the embodiment described above and the design can be changed within a scope not departing from the gist of the present invention.
  • the impeller 3 for the compressor 1 has been exemplified as a metal part having the coating structure.
  • the configuration can be employed in various other metal members including a magnesium alloy as a base material.
  • the compressor of the turbocharger has been exemplified.
  • the configuration can also be applied to an impeller of a compressor other than the turbocharger.
  • a case of laminating only one plating layer formed of a nickel-phosphorous alloy on the phosphate-coated film has been exemplified.
  • multiple plating layers formed by means of the nickel-phosphorous alloy may be provided without being limited to one layer.
  • a second plating layer made of a nickel-phosphorous alloy may be laminated in the same manner.
  • the film thickness of the first plating layer can be reduced. Therefore, adhesion of the first plating layer with respect to the phosphate-coated film can be improved.
  • the composition of the nickel-phosphorous alloy forming the first plating layer and the second plating layer is not limited to the nickel-phosphorous alloy of the same composition.
  • a nickel-phosphorous alloy having adhesion with respect to a phosphate-coated film higher than that of the second plating layer may be employed for the first plating layer.
  • a chemical conversion layer which is formed by performing chemical conversion treatment in a manner of covering a surface of a base material made of a magnesium alloy and has a film thickness within a range set in advance, adhesion and corrosion resistance of a plating layer can be enhanced.

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  • Chemical & Material Sciences (AREA)
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  • Mechanical Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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Claims (6)

  1. Beschichtungsstruktur, umfassend:
    eine chemische Umwandlungsschicht (11), die aus einem phosphatbeschichteten Film hergestellt ist und so ausgebildet ist, dass sie eine Oberfläche eines Basismaterials bedeckt, das aus einer Magnesiumlegierung hergestellt ist, die Magnesium als Hauptkomponente enthält und mindestens eine Art von Element enthält, das aus einer Gruppe, bestehend aus Gadolinium, Terbium, Thulium und Lutetium ausgewählt ist; und
    eine Plattierungsschicht (12), die aus einer Legierung auf Nickelbasis hergestellt ist und so ausgebildet ist, dass sie die chemische Umwandlungsschicht (11) bedeckt, wobei
    der phosphatbeschichtete Film aus irgendeinem von Eisenphosphat, Manganphosphat und Zinkphosphat hergestellt ist, wobei
    die Plattierungsschicht (12) aus einer Nickel-Phosphor-Legierung gebildet ist, wobei
    das Basismaterial a Atomprozent Zink enthält, in Summe b Atomprozent mindestens einer Art von Element, ausgewählt aus einer Gruppe bestehend aus Gadolinium, Terbium, Thulium und Lutetium enthält, und einen verbleibenden Teil aus Magnesium aufweist
    und wobei die Faktoren a und b, die folgenden Gleichungen (1) bis (3) erfüllen, und
    wobei das Basismaterial mindestens eine Art von Ausfällung aufweist, ausgewählt aus einer Ausfällungsgruppe, bestehend aus einer Verbindung aus Magnesium und einem Element der selten Erden, einer Verbindung aus Magnesium und Zink, einer Verbindung aus Zink und einem Element der selten Erden, und einer Verbindung aus Magnesium, Zink und einem Element der selten Erden, 0.2 ≤ a ≤ 5.0
    Figure imgb0010
     0.5 ≤ b ≤ 5.0
    Figure imgb0011
     0.5 ⁢ a − 0.5 ≤ b ⁢ .
    Figure imgb0012
  2. Ein Impeller (3), umfassend:
    die Beschichtungsstruktur nach einem der Ansprüche 1.
  3. Ein Verdichter (1), umfassend:
    den Impeller (3) nach Anspruch 2.
  4. Ein Verfahren zur Herstellung von Metallteilen, umfassend:
    einen Schritt zum Bilden einer chemischen Umwandlungsschicht (11) durch Durchführen einer chemischen Umwandlungsbehandlung in einer Weise, dass eine Oberfläche eines Basismaterials bedeckt wird, das aus einer Magnesiumlegierung hergestellt ist, die Magnesium als Hauptkomponente enthält und mindestens eine Art von Element, ausgewählt aus einer Gruppe, bestehend aus Gadolinium, Terbium, Thulium und Lutetium, enthält; und
    einen Schritt zum Bilden einer Plattierungsschicht (12), die aus einer Legierung auf Nickelbasis durch stromlose Plattierungsbehandlung in einer Art und Weise hergestellt ist, die die chemische Umwandlungsschicht bedeckt, wobei
    bei der chemischen Umwandlungsbehandlung das Basismaterial in eine Phosphat enthaltende wässrige Lösung eingetaucht wird, um einen phosphatbeschichteten Film zu bilden, wobei
    der phosphatbeschichtete Film aus irgendeinem von Eisenphosphat, Manganphosphat und Zinkphosphat hergestellt ist, wobei
    die Plattierungsschicht (12) aus einer Nickel-Phosphor-Legierung gebildet ist, wobei
    das Basismaterial a Atomprozent Zink enthält, in Summe b Atomprozent mindestens einer Art von Element enthält, ausgewählt aus einer Gruppe bestehend aus Gadolinium, Terbium, Thulium und Lutetium, und einen verbleibenden Teil aus Magnesium aufweist, und wobei die Faktoren a und b die folgenden Gleichungen (1) bis (3) erfüllen, und
    wobei das Basismaterial mindestens eine Art von Ausfällung aufweist, ausgewählt aus einer Ausfällungsgruppe, bestehend aus einer Verbindung aus Magnesium und einem Element der selten Erden, einer Verbindung aus Magnesium und Zink, einer Verbindung aus Zink und einem Element der selten Erden, und einer Verbindung aus Magnesium, Zink und einem Element der selten Erden, 0.2 ≤ a ≤ 5.0
    Figure imgb0013
     0.5 ≤ b ≤ 5.0
    Figure imgb0014
     0.5 ⁢ a − 0.5 ≤ b .
    Figure imgb0015
  5. Verfahren zur Herstellung eines Impellers, umfassend:
    das Verfahren zur Herstellung von Metallteilen nach Anspruch 4.
  6. Verfahren zur Herstellung eines Verdichters, umfassend:
    das Verfahren zur Herstellung eines Impellers nach Anspruch 5.
EP15905444.4A 2015-10-01 2015-10-01 Beschichtungsstruktur, laufrad, verdichter, metallteilherstellungsverfahren, laufradherstellungsverfahren und verdichterherstellungsverfahren Active EP3299493B1 (de)

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JP3715743B2 (ja) * 1997-04-15 2005-11-16 株式会社神戸製鋼所 Ｍｇ合金部材の製造方法
JP3307882B2 (ja) * 1998-09-18 2002-07-24 ミリオン化学株式会社 マグネシウム含有金属の低電気抵抗性皮膜処理物及びその表面処理方法
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JP4668062B2 (ja) * 2005-12-27 2011-04-13 セイコークロック株式会社 時計用指針、それを備えた時計及び時計用指針の製造方法
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