Non-oriented electrical steel plate with good magnetic performance and manufacturing method therefor

Abstract

Disclosed in the present invention is a non-oriented electrical steel plate with good magnetic performance. In addition to Fe and inevitable impurities, the non-oriented electrical steel plate further contains the following chemical elements, in percentage by mass: O<C≤0.0025%, Si: 0.2-1.6%, Mn: 0.2-0.6%, Al: 0.2-0.6%, V: 0.001-0.008%, N: 0.002-0.0045%, 0<Nb≤0.003% and 0<Ti≤0.003%. In addition, further disclosed in the present invention is a manufacturing method for the non-oriented electrical steel plate with good magnetic performance. The manufacturing method comprises the steps of: (1) smelting and casting; (2) hot rolling, wherein a steel coil is not subjected to normalizing annealing or cover annealing after hot rolling, but is directly introduced to the next step; (3) acid pickling; (4) cold rolling; and (5) finished product annealing, wherein the cold-rolled steel plate is rapidly heated from room temperature to a target soaking temperature at a heating rate of 80-1000° C./s. The non-oriented electrical steel plate of the present invention has good electromagnetic performance, low iron loss and high magnetic induction, can be effectively used for preparing an iron core, and has good popularization prospects and application value.

Dependencies are inferred from the claim text.