Non-Oriented Electrical Steel Plate and Manufacturing Process Therefor

摘要

Disclosed are a non-oriented electrical steel plate with low iron loss and high magnetic conductivity and a manufacturing process therefor. The casting blank of the steel plate comprises the following components: Si: 0.1-2.0 wt %, Al: 0.1-1.0 wt %, Mn: 0.10-1.0 wt %, C: ≦0.005 wt %, P: ≦0.2 wt %, S: ≦0.005 wt %, N: ≦0.005 wt %, the balance being Fe and unavoidable impurities. The magnetic conductivity of the steel plate meets the following relationship formula: μ10+μ13+μ15≧13982−586.5P15/50; μ10+μ13+μ15≧10000, wherein P15/50 is the iron loss at a magnetic induction intensity of 1.5 T at 50 Hz; μ10, μ13, and μ15 are relative magnetic conductivities at induction intensities of 1.0 T, 1.3 T, and 1.5 T at 50 Hz, respectively. The steel plate can be used for manufacturing highly effective and ultra-highly effective electric motors.

主权项

1. A non-oriented electrical steel sheet comprising a casting slab which comprises:
Si: 0.1˜2.0 wt %; Al: 0.1˜1.0 wt %; Mn: 0.10˜1.0 wt %; C: ≦0.005 wt %; P: ≦0.2 wt %; S: ≦0.005 wt %; N: ≦0.005 wt %; and balance being Fe and other unavoidable impurities, and a magnetic permeability of the steel sheet satisfies formulas (1) and (2):
μ10+μ13+μ15≧13982−586.5P15/50   (1);μ10+μ13+μ15≧10000   (2), wherein μ10, μ13 and μ15 respectively represent the relative magnetic permeability at magnetic inductions of 1.0 T, 1.3 T and 1.5 T at 50 Hz; P15/50 represents the iron loss at 50 Hz and under a magnetic induction of 1.5 T, P15/50 in formula (1) is calculated as a dimensionless numerical value.