US2011176914A1PendingUtilityA1

Turbocharger and blade bearing ring therefor

Assignee: BORGWARNER INCPriority: Sep 25, 2008Filed: Sep 15, 2009Published: Jul 21, 2011

Est. expirySep 25, 2028(~2.2 yrs left)· nominal 20-yr term from priority

Inventors:Gerald Schall Melanie Gabel

F02B 3/06C22C 38/48F02C 6/12F01D 25/166F05D 2220/40F05D 2240/50C22C 38/001C22C 38/58C22C 38/46

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References

Claims

Abstract

A blade bearing ring for turbocharger application in diesel engines is described, which consists of an iron-based alloy with an austenitic basic structure having dendritic carbide precipitations.

Claims

exact text as granted — not AI-modified

1 . A blade bearing ring for a turbocharger application, in particular in diesel engines, consisting of an iron-based alloy with an austenitic basic structure having dendritic carbide precipitations. 
     
     
         2 . The blade bearing ring as claimed in  claim 1 , which contains manganese sulfide. 
     
     
         3 . The blade bearing ring as claimed in  claim 1 , which contains as further components niobium at 0 to 3.5% by weight and/or vanadium at 0 to 3.7% by weight. 
     
     
         4 . The blade bearing ring as claimed in  claim 1 , which contains the following components: C: 0.2 to 0.5% by weight, Cr: 16 to 22.5% by weight, Ni: 5 to 14% by weight, Mn: 5 to 15% by weight, Si: ≦1.3% by weight, S: &lt;0.5% by weight, Nb: 0.75 to 3.5% by weight, V: 1 to 3.7% by weight, N: 0.1 to 0.6% by weight and Fe. 
     
     
         5 . The blade bearing ring as claimed in  claim 1 , which is free of sigma phases. 
     
     
         6 . An exhaust gas turbocharger for diesel engines, comprising a blade bearing ring consisting of an iron-based alloy with an austenitic basic structure having dendritic carbide precipitations. 
     
     
         7 . The exhaust gas turbocharger as claimed in  claim 6 , wherein the alloy contains manganese sulfide. 
     
     
         8 . The exhaust gas turbocharger as claimed in  claim 6 , wherein the alloy which contains as further components niobium at 0 to 3.5% by weight and/or vanadium at 0 to 3.7% by weight. 
     
     
         9 . The exhaust gas turbocharger as claimed in  claim 6 , wherein the alloy contains the following components: C: 0.2 to 0.5% by weight, Cr: 16 to 22.5% by weight, Ni: 5 to 14% by weight, Mn: 5 to 15% by weight, Si: ≦1.3% by weight, S: &lt;0.5% by weight, Nb: 0.75 to 3.5% by weight, V: 1 to 3.7% by weight, N: 0.1 to 0.6% by weight and Fe. 
     
     
         10 . The exhaust gas turbocharger as claimed in  claim 6 , wherein the alloy is free of sigma phases.

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