Non-oriented electrical steel sheet

Abstract

A non-oriented electrical steel sheet contains: C: not less than 0.003 mass % nor more than 0.05 mass %; N: not less than 0.001 mass % nor more than 0.01 mass %; and Si: not less than 2.8 mass % nor more than 3.5 mass %. The non-oriented electrical steel sheet further contains at least one kind selected from a group consisting of Ni: 4.0 mass % or less and Mn: 2.0 mass % or less, in a total amount of 0.5 mass % or more, and further contains Ti, a value R Ti being not less than 1 nor more than 10, the value R Ti being expressed by [Ti]/(4×([C]+[N])) when a Ti content is expressed as [Ti] mass %, a C content is expressed as [C] mass %, and an N content is expressed as [N] mass %. An Al content is 3.0 mass % or less, and a P content is 0.2 mass % or less.

1 . A non-oriented electrical steel sheet containing:
 C: not less than 0.003 mass % nor more than 0.05 mass %;   N: not less than 0.001 mass % nor more than 0.01 mass %; and   Si: not less than 2.8 mass % nor more than 3.5 mass %,   further containing at least one kind selected from a group consisting of Ni: 4.0 mass % or less and Mn: 2.0 mass % or less, in a total amount of 0.5 mass % or more, and   further containing Ti, a value R Ti  being not less than 1 nor more than 10, the value R Ti  being expressed by [Ti]/(4×([C]+[N])) when a Ti content is expressed as [Ti] mass %, a C content is expressed as [C] mass %, and an N content is expressed as [N] mass %,   wherein   an Al content is 3.0 mass % or less,   a P content is 0.2 mass % or less, and   a balance is composed of Fe and inevitable impurities.   
     
     
         2 . The non-oriented electrical steel sheet according to  claim 1 , wherein the Ti content is not less than 0.1 mass % nor more than 0.3 mass %. 
     
     
         3 . The non-oriented electrical steel sheet according to  claim 1 , further containing B: not less than 0.001 mass % nor more than 0.007 mass %. 
     
     
         4 . The non-oriented electrical steel sheet according to  claim 2 , further containing B: not less than 0.001 mass % nor more than 0.007 mass %. 
     
     
         5 . The non-oriented electrical steel sheet according to  claim 1 , further containing at least one kind selected from a group consisting of:
 Cu: not less than 0.02 mass % nor more than 1.0 mass %;   Sn: not less than 0.02 mass % nor more than 0.5 mass %;   Sb: not less than 0.02 mass % nor more than 0.5 mass %;   Cr: not less than 0.02 mass % nor more than 3.0 mass %; and   rare earth metal: not less than 0.001 mass % nor more than 0.01 mass %.   
     
     
         6 . The non-oriented electrical steel sheet according to  claim 2 , further containing at least one kind selected from a group consisting of:
 Cu: not less than 0.02 mass % nor more than 1.0 mass %;   Sn: not less than 0.02 mass % nor more than 0.5 mass %;   Sb: not less than 0.02 mass % nor more than 0.5 mass %;   Cr: not less than 0.02 mass % nor more than 3.0 mass %; and   rare earth metal: not less than 0.001 mass % nor more than 0.01 mass %.   
     
     
         7 . The non-oriented electrical steel sheet according to  claim 3 , further containing at least one kind selected from a group consisting of:
 Cu: not less than 0.02 mass % nor more than 1.0 mass %;   Sn: not less than 0.02 mass % nor more than 0.5 mass %;   Sb: not less than 0.02 mass % nor more than 0.5 mass %;   Cr: not less than 0.02 mass % nor more than 3.0 mass %; and   rare earth metal: not less than 0.001 mass % nor more than 0.01 mass %.   
     
     
         8 . The non-oriented electrical steel sheet according to  claim 4 , further containing at least one kind selected from a group consisting of:
 Cu: not less than 0.02 mass % nor more than 1.0 mass %;   Sn: not less than 0.02 mass % nor more than 0.5 mass %;   Sb: not less than 0.02 mass % nor more than 0.5 mass %;   Cr: not less than 0.02 mass % nor more than 3.0 mass %; and   rare earth metal: not less than 0.001 mass % nor more than 0.01 mass %.