Cast iron alloy and exhaust component manufactured thereby

Abstract

The invention relates to a cast-iron alloy comprising (in wt %) C: 3.0-3.5 Si: 4.1-4.8 Mn: ≦0.4 Mg: 0.02-0.08 Cr: 0.4-1.0 Cu: ≦0.15 Mo: 0.8-1.2 P: <0.05 S: <0.015 the remainder comprising Fe and any impurities. The invention relates also to an exhaust-conducting component for truck engines which comprises the alloy according to the invention.

1 . A cast-iron alloy comprising (in wt %):
 C: 3.0-3.5   Si: 4.1-4.8   Mn: ≦0.4   Mg: 0.02-0.08   Cr: 0.4-1.0   Cu: ≦0.15   Mo: 0.8-1.2   P: <0.05   S: <0.015   
       the remainder comprising Fe and any impurities. 
     
     
         2 . The cast-iron alloy according to  claim 1 , which in solidified state has a structure of spheroidal graphite nodules in a mainly ferritic matrix. 
     
     
         3 . The cast-iron alloy according to  claim 1 , wherein the C content is 3.0-3.3 wt %. 
     
     
         4 . The cast-iron alloy according to  claim 1 , wherein the Si content is 4.2-4.4 wt %. 
     
     
         5 . The cast-iron alloy according to  claim 1 , wherein the Cr content is 0.5-1.0 wt %. 
     
     
         6 . The cast-iron alloy according to  claim 1 , wherein the Cr content is 0.6-1.0 wt %. 
     
     
         7 . The cast-iron alloy according to  claim 1 , wherein the Cr content is 0.60-0.75 wt %. 
     
     
         8 . The cast-iron alloy according to  claim 1 , wherein the Mo content is 0.8-1.0 wt %. 
     
     
         9 . An exhaust-conducting component for truck engines, comprising a cast-iron alloy according to  claim 1 . 
     
     
         10 . An exhaust-conducting component for truck engines according to  claim 9 , wherein the exhaust-conducting component is in the form of a turbo manifold, an exhaust manifold or a turbine housing for a turbo.