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US 10,371,085 B2Granted
Cylinder liner and method of forming the same
AssigneeZynp International Corp.
InventorXiaocai Qin
Life of this patent
Estimating the term…
Abstract
A high strength cast iron material for application in heavy duty diesel engines with Pa peak cylinder pressure greater than 240 bar is disclosed, the material a ductile material austempered to get a ausferrite matrix structure with higher mechanical properties than conventional cast iron materials available by using a designed low cost alloying cast material with heat treatment. Furthermore, the cylinder liner may be formed using novel heat treatment and/or fine honing processes to improve the properties thereof.
Claims19
A cylinder liner comprising:
- a first portion including a first graphite morphology in a first matrix including iron;
- and
- a second portion including a second graphite morphology in a second matrix including iron, the first graphite morphology different from the second graphite morphology, the second portion including austempered ductile iron.
A cylinder liner comprising:
- an inner surface including compact graphite iron;
- and
- an outer surface including austempered ductile iron.
A cylinder liner comprising:
- an inner portion including a first graphite morphology in a first matrix including iron;
- and
- an outer portion including a second graphite morphology in a second matrix including iron, the outer portion having an ultimate tensile strength that is at least 200 MPa greater than an ultimate tensile strength of the inner portion, the second portion including austempered ductile iron.
Dependencies are inferred from the claim text.