| 摘要 |
PURPOSE: A manufacturing method of an oriented electrical steel sheet with excellent magnetic property is provided to manufacture an oriented electrical steel sheet having very low core loss and high density magnetic flux by increasing crystal grains in a firstly recrystallized sheet by adding proper quantity of Cr(Chromium). CONSTITUTION: A manufacturing method of an oriented electrical steel sheet with excellent magnetic property is as follows. A slab is composed of Si 2.0 to 4.0wt.%, C(Carbon) lower than 0.085wt.%, acid-soluble Al(Aluminum) 0.015 to 0.04wt.%, Mn(Manganese) lower than 0.20wt.%, Cr 0.02 to 0.35wt.%, N(Nitrogen) lower than 0.010wt.%, S(Sulfur) lower than 0.010wt.%, residual Fe(Iron), and inevitable impurities. The slab is heated and hot-rolled and then gone through two or more cold rolling processes, and primary and secondary recrystallizing annealing are applied to the slab successively. |
