Cylinder liners

F - Mech Eng,Light,Heat,Weapons – 02 – F

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F02F 1/08 (2006.01) C21D 1/74 (2006.01) C21D 9/14 (2006.01) C23C 8/32 (2006.01) F02F 1/00 (2006.01) F02F 1/16 (2006.01) F16J 10/04 (2006.01)

Patent

CA 1225311

ABSTRACT OF THE DISCLOSURE A cylinder liner is produced from a mild steel by pressing, drawing or extruding to a tubular shape and then finish machining. The finally shaped liner is then nitrocarburised with a mixture of carburising and nitrogenous gases to form a hard "epsilon" layer on the liner surfaces. The liner so produced requires no subsequent finishing processes, can be pressed into an engine block without brittle fracture and is resistant to both exterior wear from waxer, in a wet liner, or from the engine block, in a dry liner, and interior bore wear from an associated piston and piston rings.

462470

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