Patent ID: 11969783
Assignee: MAGNA INTERNATIONAL INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  Y | IPC B

Claim 3:
4. A shot sleeve, comprising:
a body extending circumferentially around a center axis and longitudinally from a first end to a second end;
the body presenting a body inner surface and a body outer surface;
the body including a pouring hole;
an insert located opposite the pouring hole;
the insert comprising a base layer, an inner layer, and at least one middle layer between the base layer and the inner layer;
the inner layer presenting an insert inner surface adjacent the body inner surface;
the base layer including metal;
the inner layer including ceramic;
the at least one middle layer including metal in an amount greater than an amount of metal in the inner layer and less than an amount of the metal in the base layer; and
the at least one middle layer including ceramic in an amount less than an amount of the ceramic in the inner layer and greater than an amount of ceramic in the base layer;
wherein the metal of the base layer and the metal of the at least one middle layer includes steel;
the metal of the at least one middle layer further includes an alloy of chromium, iron, and molybdenum; and
the ceramic of the at least one middle layer and the ceramic of the inner layer includes zirconium oxide.