Turbocharger and adjustment ring therefor

Abstract

An adjustment ring 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 adjustment ring for turbocharger application, particularly in diesel engines, consisting of an iron-based alloy with an austenitic basic structure and dendritic carbide precipitations. 
     
     
         2 . The adjustment ring as claimed in  claim 1 , which contains the following components:
 C: 0.4 to 1.7% by weight, Cr: 23 to 43% by weight, Ni: 5 to 15% by weight,   Mn: 8 to 16% by weight, Si: ≦1.3% by weight, Mo: 0.45 to 4% by weight,   W: 0.3 to 3.1% by weight, and Fe.   
     
     
         3 . The adjustment ring, as claimed in  claim 1 , which contains the following components:
 C: 0.6 to 1.5% by weight, Cr: 26 to 38% by weight, Ni: 5 to 13% by weight,   Mn: 10 to 14.5% by weight, Si: ≦1% by weight, Mo: 0.75 to 3.5% by weight,   W: 0.5 to 2.6% by weight, and Fe.   
     
     
         4 . The adjustment ring 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 adjustment ring 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 adjustment ring contains the following components:
 C: 0.4 to 1.7% by weight, Cr: 23 to 43% by weight, Ni: 5 to 15% by weight,   Mn: 8 to 16% by weight, Si: ≦1.3% by weight, Mo: 0.45 to 4% by weight,   W: 0.3 to 3.1% by weight, and Fe.   
     
     
         7 . The exhaust gas turbocharger as claimed in  claim 5 , wherein the adjustment ring contains the following components:
 C: 0.6 to 1.5% by weight, Cr: 26 to 38% by weight, Ni: 5 to 13% by weight,   Mn: 10 to 14.5% by weight, Si: ≦1% by weight, Mo: 0.75 to 3.5% by weight,   W: 0.5 to 2.6% by weight, and Fe.   
     
     
         8 . The exhaust gas turbocharger as claimed in  claim 5 , wherein the material of the adjustment ring is free of sigma phases.