Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D19/00—Casting in, on, or around objects which form part of the product
  • B22D19/0009—Cylinders, pistons
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D19/00—Casting in, on, or around objects which form part of the product
  • B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
  • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
  • C23C2/36—Elongated material
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
  • C23C2/36—Elongated material
  • C23C2/38—Wires; Tubes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F1/00—Cylinders; Cylinder heads 

Definitions

• the invention relates to a method for coating the outer surface of a cylinder liner according to the preamble of claim 1.
• the object of the invention is to avoid this disadvantage of the prior art and also to provide a simple and inexpensive coating process.
• a cylinder liner which consists of an iron-based material that may be alloyed or unalloyed.
• the cylinder liner is made of gray cast iron, which may contain either lamellar graphite, vermicular graphite or nodular graphite.
• the gray cast iron can in this case have a ferritic-pearlitic, a pearlitic, a bainitic or an austenitic basic structure.
• the outer surface of the cylinder liner may be smooth. But it can also have all other surface finishes to a flat Raugussober Structure.
• the outer surface, the front side and the inner surface of the cylinder liner can be pre-machined by turning.
• the cylinder crankcase is made of one of the common light alloy castings, using both aluminum-based castings such as EN AC-AISi10Mg (Fe), EN AC-AlSi10Mg (Cu), ENAC-AlSi9Cu3 (Fe), EN AC-AISi12 (Cu) , as well as magnesium-based, such as EN MC-MgA19Zn1 (A), EN MC-MgY4RE3Zr eligible.
• aluminum-based castings such as EN AC-AISi10Mg (Fe), EN AC-AlSi10Mg (Cu), ENAC-AlSi9Cu3 (Fe), EN AC-AISi12 (Cu)
• magnesium-based such as EN MC-MgA19Zn1 (A), EN MC-MgY4RE3Zr eligible.
• the outer surface of the cylinder liner is coated by dipping. In preparation for this, it is necessary to clean the outer surface of dirt and oxides and then roughen. Suitable methods for this are brushing and / or blasting. For example, coarse corundum, ie, crystallized Al 2 O 3 , can be used for blasting.
• the outer surface of the cylinder liner is pickled and / or coated with a flux, which is zinc chloride-aluminum chloride double salt or salmiacite (ammonium chloride) is suitable. This is to remove oxides from the outer surface of the cylinder liner to promote the alloying of a metal layer described below.
• a flux which is zinc chloride-aluminum chloride double salt or salmiacite (ammonium chloride) is suitable. This is to remove oxides from the outer surface of the cylinder liner to promote the alloying of a metal layer described below.
• the subsequent dipping process for coating the outer surface of the cylinder liner takes place in a zinc-aluminum-copper melt with 3% to 12% copper and 2% to 8% aluminum, the remainder of the melt being zinc.
• a zinc-aluminum-copper melt with 3% to 12% copper and 2% to 8% aluminum, the remainder of the melt being zinc.
• up to 1% magnesium may be added to the melt.
• the cylinder liner is so far submerged in the melt until a small, over the entire axial length of the cylinder liner continuous segment of the outer surface but not the inner surface of the cylinder liner is wetted by the melt.
• the cylinder liner is then rotated about its longitudinal axis, wherein the melt is set by ultrasound in a high-frequency movement. This promotes alloying between the cylinder liner alloy and the zinc base alloy of the melt to form a layered intermetallic and mixed crystal layer system that provides metallic bonding of the cylinder liner with the surrounding metal layer.
• the metal layer has reached a thickness of 100 microns to 300 microns, and the cylinder liner is removed from the melt.
• the cylinder liner is then mounted horizontally in a holder, wherein excess melt drips and solidifies the applied metal layer.
• the copper component of the alloy has the advantage that an oxide film that may form during coating does not become too dense, so that it peels off easily when poured.
• the liquidus temperature of the melt is between 440 ° C and 520 ° C, causing the metal layer to melt from its encapsulation material as the cylinder crankcase is cast, thereby ensuring the metallic bond between the cylinder liner and the cylinder crankcase encapsulant. If the gravity casting method is used for this, it is necessary to heat the coated cylinder liners to 300 ° C to 400 ° C. This is omitted in the application of the die-casting process for the production of the cylinder crankcase.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Combustion & Propulsion (AREA)
• General Engineering & Computer Science (AREA)
• Cylinder Crankcases Of Internal Combustion Engines (AREA)
• Pistons, Piston Rings, And Cylinders (AREA)
• Coating With Molten Metal (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=37671959

Family Applications (1)

Country Status (8)

Families Citing this family (7)

Family Cites Families (23)

• 2005
  • 2005-09-01 DE DE102005041410A patent/DE102005041410A1/de not_active Withdrawn
• 2006
  • 2006-08-31 RU RU2008111965/02A patent/RU2421540C2/ru not_active IP Right Cessation
  • 2006-08-31 US US11/991,235 patent/US20090258140A1/en not_active Abandoned
  • 2006-08-31 WO PCT/DE2006/001529 patent/WO2007025531A1/de not_active Ceased
  • 2006-08-31 BR BRPI0615428-0A patent/BRPI0615428A2/pt active Search and Examination
  • 2006-08-31 EP EP06791335A patent/EP1920150B1/de not_active Ceased
  • 2006-08-31 JP JP2008528335A patent/JP2009507159A/ja active Pending
  • 2006-08-31 CN CNA2006800321472A patent/CN101253321A/zh active Pending

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