Turbocharger and component therefor

Abstract

A component for turbocharger applications, in particular in diesel engines, which has an iron-based alloy having a ferritic base structure which has a carbide and nitride structure.

1 . A component for turbocharger applications, in particular in diesel engines, comprising an iron-based alloy having a ferritic base structure comprising a carbide and nitride structure. 
     
     
         2 . The component for turbocharger applications as claimed in  claim 1 , comprising at least one of the elements selected from: W, Ti and Nb. 
     
     
         3 . The component for turbocharger applications as claimed in  claim 1 , comprising at least one of the elements selected from: C, W, Cr, Mn, Ti, V, Nb and Si. 
     
     
         4 . The component for turbocharger applications as claimed in  claim 1 , comprising substantially the following elements:
 C: 0.1 to 0.5% by weight, in particular 0.25 to 0.4% by weight,   Cr: 15 to 22% by weight, in particular 18 to 20% by weight,   Mn: ≦1.3% by weight, in particular ≦1% by weight,   Si: 0.8 to 2.1% by weight, in particular 1 to 1.8% by weight,   Nb: 0.4 to 1.3% by weight, in particular 0.6 to 1.1% by weight,   Ti: 0.2 to 0.6% by weight, in particular 0.3 to 0.5% by weight,   W: 1.8 to 3.0% by weight, in particular 2 to 2.7% by weight,   V: 0.3 to 1.0% by weight, in particular 0.5 to 0.8% by weight,   N: ≦3% by weight, in particular ≦2% by weight, and   Fe: ad 100% by weight.   
     
     
         5 . The component for turbocharger applications as claimed in  claim 1 , wherein it is substantially free of sigma phases. 
     
     
         6 . The component for turbocharger applications as claimed in  claim 1 , wherein the component is at least one of a kinematics component, a wastegate component and a VTG component. 
     
     
         7 . An exhaust-gas turbocharger in particular for diesel engines, comprising at least one component consisting of an iron-based alloy having a ferritic base structure comprising a carbide and nitride structure. 
     
     
         8 . The exhaust-gas turbocharger as claimed in  claim 7 , wherein the component comprises at least one of the elements selected from: W, Ti and Nb. 
     
     
         9 . The exhaust-gas turbocharger as claimed in  claim 7 , wherein the component comprises substantially the following elements:
 C: 0.1 to 0.5% by weight, in particular 0.25 to 0.4% by weight,   Cr: 15 to 22% by weight, in particular 18 to 20% by weight,   Mn: ≦1.3% by weight, in particular ≦1% by weight,   Si: 0.8 to 2.1% by weight, in particular 1 to 1.8% by weight,   Nb: 0.4 to 1.3% by weight, in particular 0.6 to 1.1% by weight,   Ti: 0.2 to 0.6% by weight, in particular 0.3 to 0.5% by weight,   W: 1.8 to 3.0% by weight, in particular 2 to 2.7% by weight,   V: 0.3 to 1.0% by weight, in particular 0.5 to 0.8% by weight,   N: ≦3% by weight, in particular ≦2% by weight, and   Fe: ad 100% by weight.   
     
     
         10 . The exhaust-gas turbocharger as claimed in  claim 7 , wherein the component is substantially free of sigma phases. 
     
     
         11 . The component for turbocharger applications as claimed in  claim 1 , wherein the component is a VTG component and/or a flap mount part. 
     
     
         12 . The exhaust-gas turbocharger as claimed in  claim 7 , wherein the component comprises at least one of the elements selected from: C, W, Cr, Mn, Ti, V, Nb and Si.