초록 ▼

An inventive cylinder liner of the present invention includes a dual phase graphite morphology. An outer diameter of the cylinder liner is comprised of ductile (nodular) and vermicular iron while an inner diameter of the cylinder liner is comprised of predominantly gray iron. A transition region of

An inventive cylinder liner of the present invention includes a dual phase graphite morphology. An outer diameter of the cylinder liner is comprised of ductile (nodular) and vermicular iron while an inner diameter of the cylinder liner is comprised of predominantly gray iron. A transition region of predominantly vermicular iron is preferably disposed between the inner diameter and the outer diameter. The inventive cylinder is preferably made using a centrifugal casting process, which provides a transition in the cylinder wall between the ductile and vermicular iron at the outer diameter to the predominantly gray iron at the inner diameter.

대표청구항 ▼

1. A method of making a cylinder liner for use in an internal combustion engine, comprising the steps of:placing a predetermined amount of a magnesium bearing material into a centrifugal die; adding gray iron to said centrifugal die; forming a solidified composition by spinning said gray iron and sa

1. A method of making a cylinder liner for use in an internal combustion engine, comprising the steps of:placing a predetermined amount of a magnesium bearing material into a centrifugal die; adding gray iron to said centrifugal die; forming a solidified composition by spinning said gray iron and said magnesium bearing material; and forming said cylinder liner from said solidified composition, said cylinder liner having an outer diameter of ductile iron and vermicular iron, and an inner diameter of predominantly gray iron.