Dana Corporation

Anthony George Angilella

Thomas J Smith

Michael A Kestner

Paul D Macy

William Patrick Wallace

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.

Method of making dual phase graphite cylinder liner

An inventive cylinder liner of the prevent 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 verimcular iron at the outer diameter to the predominantly gray iron at the inner diameter.

Dual phase graphite cylinder liner and method of making the same

An abrasion-resistant material is constructed from gray iron alloyed with 0.30 to 0.70% phosphorous. The high phosphorous cast iron alloy is heat treated for approximately 120 minutes to an austenitizing temperature of about 1600.degree. F. Next, the alloy is austempered for approximately 180 minutes at about 580.degree. F. The resulting abrasion-resistant structure is an acicular ferrite in stable austenite (ausferrite) with islands of a non-continuous, broken network of steadite of approximately 8 to 10% by volume, which has a material hardness of 280 to 330 BHN.

Abrasion-resistant material

Disclosed herein is a method of making an improved bearing surface wherein a first layer of hard chromium is electrodeposited on a metallic substrate, a second layer of microcracked chromium is deposited on the first layer and the second layer of microcracked chromium is etched to provide a finely porous, friable bearing surface.

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Richmond, IN, United States of America

Anthony George Angilella