Turbocharger and adjustable blade therefor

Abstract

An adjustable blade for turbocharger applications, particularly in diesel engines, is described, which consists of an iron-based alloy with an austenitic basic structure with dendritic carbide precipitations.

1 . An adjustable blade for turbocharger application, particularly in diesel engines, consisting of an iron-based alloy with an austenitic basic structure and dendritic carbide precipitations. 
     
     
         2 . The adjustable blade as claimed in  claim 1 , which contains the following components:
 C: 0.1 to 2% by weight, Cr: 18 to 43% by weight, Ni: 5 to 15% by weight, Mn: 8 to 16% by weight, Si: ≦1.3% by weight, Nb: 0.5 to 4% by weight, N: 0.1 to 3% by weight, V: 0.2 to 2.0% by weight, and Fe.   
     
     
         3 . The adjustable blade as claimed in  claim 1 , which contains the following components:
 C: 0.2 to 1.0% by weight, Cr: 20 to 32% by weight; Ni: 7 to 14% by weight, Mn: 9 to 14.5% by weight, Si: ≦1% by weight, Nb: 0.75 to 3.5% by weight, N: 0.1 to 1.0% by weight, V: 0.3 to 1.6% by weight, and Fe.   
     
     
         4 . The adjustable blade as claimed in  claim 1 , wherein the iron-based alloy is free of sigma phases. 
     
     
         5 . An exhaust gas turbocharger, particularly for diesel engines, comprising an adjustable blade consisting of an iron-based alloy with an austenitic basic structure and dendritic carbide precipitations. 
     
     
         6 . The exhaust gas turbocharger as claimed in  claim 5 , wherein the adjustable blade contains the following components:
 C: 0.1 to 2% by weight, Cr: 18 to 43% by weight, Ni: 5 to 15%, by weight, Mn: 8 to 16% by weight, Si ≦1.3% by weight, Nb: 0.5 to 4% by weight, N: 0.1 to 3% by weight, V: 0.2 to 2.0% by weight, and Fe.   
     
     
         7 . The exhaust gas turbocharger as claimed in  claim 5 , wherein the adjustable blade contains essentially the following components:
 C: 0.2 to 1.0% by weight, Cr: 20 to 32% by weight, Ni: 7 to 14% by weight, Mn: 9 to 14.5% by weight, Si: ≦1% by weight, Nb: 0.75 to 3.5% by weight, N: 0.1 to 1.0% by weight, V: 0.3 to 1.6% by weight, and Fe.   
     
     
         8 . The exhaust gas turbocharger as claimed in  claim 5 , wherein the material of the adjustable blade is free of sigma phases.