Exhaust-gas turbine
First Claim
1. An exhaust-gas turbine for a turbocharger, comprising:
- a turbine casing having a spiral inlet duct;
a rotor rotatably mounted in the turbine casing, an annular space of the turbine casing surrounding the rotor;
an axial slide;
a sliding sleeve; and
a guide-blade cascade including guide blades, the guide-blade cascade being axially movable into the annular space near an outer circumference of the rotor, the guide-blade cascade being guided in an annular gap formed between an inner part and the turbine casing and being axially displaceable via the axial slide by the sliding sleeve;
wherein the guide-blade cascade and at least one of the axial slide, the inner part and the sliding sleeve are formed from an austenitic cast steel material having the following components;
C≦
0.2%;
Si 1.5-2.5%;
Mn≦
2.00%;
P≦
0.045%;
S≦
0.03%;
Cr 24.0-26.0%;
Ni 19-22%; and
W≦
5%.
2 Assignments
0 Petitions
Accused Products
Abstract
An exhaust-gas turbine for a turbocharger includes a rotor mounted rotatably in a turbine casing having a spiral inlet duct which is followed by an annular space surrounding the rotor. A guide-blade cascade is capable of being pushed axially into the annular space near the outer circumference of the rotor. The guide-blade cascade includes guide blades, is guided in an annular gap between an inner part and the turbine casing and is axially displaceable via an axial slide by a sliding sleeve. The guide-blade cascade with the axial slide, the inner part and/or the sliding sleeve are produced from an austenitic cast steel material having the following components:
C≦0.2%;
Si 1.5-2.5%;
Mn≦2.00%;
P≦0.045%;
S≦0.03%;
Cr 24.0-26.0%;
Ni 19-22%; and
W≦5%.
21 Citations
3 Claims
-
1. An exhaust-gas turbine for a turbocharger, comprising:
-
a turbine casing having a spiral inlet duct;
a rotor rotatably mounted in the turbine casing, an annular space of the turbine casing surrounding the rotor;
an axial slide;
a sliding sleeve; and
a guide-blade cascade including guide blades, the guide-blade cascade being axially movable into the annular space near an outer circumference of the rotor, the guide-blade cascade being guided in an annular gap formed between an inner part and the turbine casing and being axially displaceable via the axial slide by the sliding sleeve;
wherein the guide-blade cascade and at least one of the axial slide, the inner part and the sliding sleeve are formed from an austenitic cast steel material having the following components;
C≦
0.2%;
Si 1.5-2.5%;
Mn≦
2.00%;
P≦
0.045%;
S≦
0.03%;
Cr 24.0-26.0%;
Ni 19-22%; and
W≦
5%.- View Dependent Claims (2, 3)
-
Specification