High Alloy Iron, Use of the Material for Structural Components that are Subject to High Thermal Stress and Corresponding Structural Component

Abstract

The invention relates to a high alloy iron that has an austenitic structure and a spherical graphite configuration and comprises the following components in percent by weight: carbon<2.0%, silicon 2.0-6.0%, nickel 29-36%, chrome 1.0-2.5%, niobium 0.1-1.0% and molybdenum 0.1-2.5%. The invention also relates to the use of the cast iron material for structural components that are subject to high thermal stress, especially for exhaust manifolds and turbocharger housings of internal combustion engines of the individual or integrated type of construction. The invention finally relates to a structural component that is subject to high thermal stress, especially the exhaust system of an engine consisting of the aforementioned cast iron material.

1 . High-alloy cast iron material having an austhenitic structure and spherical graphite configuration with higher temperature fluctuation resistance and advantageous use for engines characterized in that the material expressed in percent of weight contains the following ingredients: 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   Carbon 
                   <2.0% 
                 
                     
                   Silicon 
                   2.0-6.0% 
                 
                     
                   Nickel 
                   29-36% 
                 
                     
                   Chrome 
                   1.0-2.5% 
                 
                     
                   Niobium 
                   0.1-1.0% 
                 
                     
                   Molybdenum 
                   0.1-2.5% 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         2 - 13 . (canceled)