US 2026/0103783 A1Published application

Non-oriented electrical steel and a method of manufacturing non-oriented electrical steel thereof

OwnerSigrid JACOBS, Xavier CHASSANG +1inventors

InventorsSigrid JACOBS, Xavier CHASSANG, Elke LEUNIS

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Abstract

A non-oriented electrical steel sheet having a composition comprising of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.25%, 2.9%≤Silicon≤3.4%, 0.7%≤Aluminum≤1.3%, 0.05%≤Nickel≤1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn≤5.5%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 35% when calculated in accordance of Bertotti method.

Claims14

Dependent claims

A non-oriented electrical steel sheet having a thickness from 0.23 mm to 0.26 mm and a composition comprising the following elements, expressed in percentage by weight:

0.0001
%
≤
Carbon
≤
0.007
%
0.15
%
≤
Manganese
≤
0.25
%
2.9
%
≤
Silicon
≤
3.4
%
0.7
%
≤
Aluminum
≤
1.3
%
0.05
%
≤
Nickel
≤
1
⁢
%
Phosphorus
≤
0.15
%
Sulfur
≤
0.006
%
Nitrogen
≤
0.09
%
0.01
%
≤
Chromium
≤
1
⁢
%
0.01
%
≤
Copper
≤
1
⁢
%
0.01
%
≤
Tin
≤
0.2
%
with
3.85
%
≤
Si
+
Al
+
Mn
≤
5.5
%
and optionally one or more of the following elements
0
⁢
%
≤
Niobium
≤
0.1
%
0
⁢
%
≤
Titanium
≤
0.1
%
0
⁢
%
≤
Vanadium
≤
0.1
%
0
⁢
%
≤
Molybdenum
≤
0.5
%
0
⁢
%
≤
Tungsten
≤
0.1
%
0
⁢
%
≤
Cobalt
≤
1
⁢
%
0
⁢
%
≤
Arsenic
≤
0.05
%
0.001
%
≤
Calcium
≤
0.01
%
0
⁢
%
≤
Boron
≤
0.05
%
0
⁢
%
≤
Lead
≤
0.2
%
0
⁢
%
≤
Antimony
≤
0.2
%
a remainder of the composition being composed of iron and unavoidable impurities caused by processing,
a microstructure of the steel sheet being made of ferrite and comprising in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein an average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 35% when calculated in accordance of Bertotti method.

171 more elements

Dependencies are inferred from the claim text.