Electrical steel with high strength and low electrical losses

Abstract

An electrical steel comprises a mixture of elements comprising at least the following elements by weight percent. 0% < Chromium <1.0% 0% < Copper <0.10%  0% < Nickel  <6.0%. The electrical steel has a partial recrystallization with smaller grain size than would be the grain size given a complete recrystallization. The electrical steel has a yield strength above 550 N/mm 2 and an electrical loss below 2.0 watts/pound at 1.5 Tesla at 60 Hz which corresponds to 3.5 watts/kg at 1.5 Tesla at 50 Hz.

1 . An electrical steel, comprising:
 a mixture of elements comprising at least the following elements by weight percent   
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   0% < Chromium 
                   <1.0% 
                 
                     
                   0% < Copper 
                   <0.10%  
                 
                     
                   0% < Nickel 
                    <6.0%; 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
               
            
           
         
         said electrical steel having a partial recrystallization with smaller grain size than would be the grain size given a complete recrystallization; and 
         said electrical steel having a yield strength above 550 N/mm 2  and an electrical loss below 2.0 watts/pound at 1.5 Tesla at 60 Hz which corresponds to 3.5 watts/kg at 1.5 Tesla at 50 Hz. 
       
     
     
         2 . The electrical steel of  claim 1  wherein the electrical loss is below 1.45 watts/pound at 1.5 Tesla at 60 Hz which corresponds to 2.50 watts/kg at 1.5 Tesla at 50 Hz. 
     
     
         3 . The electrical steel of  claim 1  wherein in addition to said chromium, copper, and nickel, said electrical steel has at least the following additional elements: 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   0% < Carbon 
                   <0.015% 
                 
                     
                   Manganese 
                   0.10 to 0.35% 
                 
                     
                   0% < Phosphorus 
                   <0.080% 
                 
                     
                   0% < Sulfur 
                   <0.005% 
                 
                     
                   Silicon 
                   2.8 to 3.3% 
                 
                     
                   Aluminum 
                   0.35 to 1.6%