Coated bore aluminum cylinder liner for aluminum cast blocks

• Main Authors: Maki, Clifford E, Hintzen, Mathew Leonard, Schepak, Antony George
• Format: Patent
• Language: English
• Published: 20.11.2018
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMBINED OPERATIONS; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; DIFFUSION TREATMENT OF METALLIC MATERIAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINE TOOLS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; OTHER WORKING OF METAL; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WEAPONS

Engine blocks and methods of forming engine blocks are disclosed. The engine block may include a cast aluminum body and a plurality of cast-in liners. Each cast-in liner may include (a) an outer layer of 2xxx-series aluminum molecularly bonded to the cast aluminum body and (b) an inner layer directly contacting the outer layer and forming at least a portion of an engine bore. The inner layer may be a wear-resistant coating, such as a steel coating. The method may include extruding an elongated 2xxx-series aluminum extrusion having an inner cavity bounded by an inner surface and applying a wear-resistant coating to the inner surface. The extrusion may be sectioned into a plurality of cylinder liners and the cylinder liners may be into an aluminum engine block such that each cast-in liner forms at least a portion of an inner surface of an engine bore in the engine block.