Forged article with prealloyed powder

Abstract

These connecting rods are made from prealloyed manganese, sulfur, ferrous based powder. The prealloyed powder then is mixed with copper and carbon. The copper content is at higher than normal copper contents. The resulting forged connecting rods had an improvement in tensile strength and an improvement in fatigue strength.

I claim:  
     
         1 . A powder useful for producing forged articles comprising a mixture of a prealloyed manganese, sulfur, ferrous based powder, copper and carbon wherein the mixture has a copper content higher than 2% by weight.  
     
     
         2 . A powder according to  claim 1  comprising:  
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                     
                 
                     
                   Component 
                   Weight Percent 
                 
                     
                     
                 
                     
                   copper (Cu) 
                   2.0 to 5.0 
                 
                     
                   carbon (C) 
                   0.2 to 1.0 
                 
                     
                   prealloyed Mn S ferrous based powder 
                   balance. 
                 
                     
                     
                 
                     
                     
                 
             
                
                
                
                
               
               
                
                
                
                
                
               
            
           
         
       
     
     
         3 . A powder according to  claim 1  comprising:  
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                     
                 
                     
                   Component 
                   Weight Percent 
                 
                     
                     
                 
                     
                   Cu 
                   2.5 to 4.5 
                 
                     
                   C 
                   0.2 to 0.7 
                 
                     
                   prealloyed Mn S ferrous based powder 
                   balance. 
                 
                     
                     
                 
                     
                     
                 
             
                
                
                
                
               
               
                
                
                
                
                
               
            
           
         
       
     
     
         4 . A powder according to  claim 1  comprising:  
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                     
                 
                     
                   Component 
                   Weight Percent 
                 
                     
                     
                 
                     
                   Cu 
                   3.0 to 4.0 
                 
                     
                   C 
                   0.4 to 0.7 
                 
                     
                   Prealloyed Mn S ferrous based powder 
                   balance. 
                 
                     
                     
                 
                     
                     
                 
             
                
                
                
                
               
               
                
                
                
                
                
               
            
           
         
       
     
     
         5 . A forged article produced from the powder mixture of  claim 1 .  
     
     
         6 . A forged connecting rod produced from the powder mixture of  claim 1.