# US 11,111,567 B2 · Non-oriented electrical steel sheet

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- Number: US 11,111,567 B2
- Document ID: US11111567B2
- Status: Granted
- Kind: B2
- Application number: 16/970,573
- Filed: 2019-03-25
- Published: 2021-04-15
- Granted: 2021-09-07
- Earliest claimed: 2018-03-26
- Assignees: Nippon Steel Corporation
- Applicants: Nippon Steel Corporation
- Inventors: Tesshu Murakawa; Hiroshi Fujimura; Satoshi Kano
- Web page: https://patentgrep.com/patent/US11111567B2

## CPC

- C22C 38/42: with copper
- B32B 15/01: all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)}
- C21D 1/26: Methods of annealing
- C21D 6/001: {containing Ni (C21D6/004 takes precedence)}
- C21D 6/004: {containing Cr and Ni}
- C21D 6/005: {containing Mn}
- C21D 6/008: {containing Si}
- C21D 8/00: Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment (hardening articles or materials formed by forging or rolling with no further heating beyond that required for the formation C21D1/02)
- C21D 8/1222: {Hot rolling}
- C21D 8/1233: {Cold rolling}
- C21D 8/1261: {following hot rolling}
- C21D 8/1272: {Final recrystallisation annealing}
- C21D 9/46: for sheet metals
- C22C 38/00: Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00)
- C22C 38/002: {containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60}
- C22C 38/005: {containing rare earths, i.e. Sc, Y, Lanthanides}
- C22C 38/008: {containing tin}
- C22C 38/04: containing manganese
- C22C 38/06: containing aluminium
- C22C 38/34: with more than 1.5% by weight of silicon
- C22C 38/40: with nickel
- C23C 30/00: Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence)
- C23C 30/005: {on hard metal substrates}
- H01F 1/147: Alloys characterised by their composition {(treatment thereof for enhancing their electromagnetic properties C21D8/12)}
- H01F 1/16: in the form of sheets (H01F1/147 takes precedence)
- C21D 8/12: during manufacturing of articles with special electromagnetic properties
- C21D 2201/05: Grain orientation
- C22C 38/004: {Very low carbon steels, i.e. having a carbon content of less than 0,01%}
- C22C 38/02: containing silicon
- C22C 38/08: containing nickel {(C22C38/105 takes precedence)}
- C22C 38/16: containing copper
- C22C 38/18: containing chromium
- C22C 38/20: with copper
- C22C 38/38: with more than 1.5% by weight of manganese
- C22C 38/58: with more than 1.5% by weight of manganese
- C22C 2202/02: Magnetic
- Y10T 428/12951: Fe-base component
- Y10T 428/12972: Containing 0.01-1.7% carbon [i.e., steel]
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B)
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A non-oriented electrical steel sheet including, as a chemical composition, by mass %: C: 0.0030 % or less; Si: 2.00 % to 4.00 %; Al: 0.01 % to 3.00 %; Mn: 0.10 % to 2.00 %; P: 0.005 % to 0.200 %; S: 0.0030 % or less; Cu: more than 1.0 % and 3.0 % or less; Ni: 0.10 % to 3.0 %; one or more coarse precipitate forming element: more than 0.0005 % and 0.0100 % or less in total; a parameter Q (Q=[Si] +2 [Al] [Mn]) is 2.00 or more; Sn: 0.00 % to 0.40 %; Cr: 0.0 % to 10.0 %, and a remainder: Fe and impurities, wherein a number of Cu particles having a diameter of less than 100 nm is 5 or more per 10 μm2, a {100} crystal orientation intensity is 2.4 or more, a thickness is 0.10 mm to 0.60 mm, and an average grain size is 70 μm to 200 μm.

## Claims

### Claim 1

A non-oriented electrical steel sheet comprising, as a chemical composition, by mass %:
C: 0.0030% or less;
Si: 2.00% to 4.00%;
Al: 0.01% to 3.00%;
Mn: 0.10% to 2.00%;
P: 0.005% to 0.200%;
S: 0.0030% or less;
Cu: more than 1.0% and 3.0% or less;
Ni: 0.10% to 3.0%;
one or more of Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, and Cd: more than 0.0005% and 0.0100% or less in total;
a parameter Q represented by Formula 1 where a Si content (mass %) is set as [Si], an Al content (mass %) is set as [Al], and a Mn content (mass %) is set as [Mn]: 2.00 or more;
Sn: 0.00% to 0.40%;
Cr: 0.0% to 10.0%, and
a remainder: Fe and impurities,
wherein a number of Cu particles having a diameter of less than 100 nm is 5 or more per 10 μm2,
a {100} crystal orientation intensity is 2.4 or more,
a thickness is 0.10 mm to 0.60 mm, and
an average grain size is 70 μm to 200 μm
Q=[Si] +2 [Al]−[Mn] (Formula 1).

### Claim 2 (depends on 1)

The non-oriented electrical steel sheet according to claim 1, wherein, in the chemical composition,
Sn: 0.02% to 0.40%
is satisfied.

### Claim 3 (depends on 2)

The non-oriented electrical steel sheet according to claim 2, wherein, in the chemical composition,
Cr: 0.2% to 10.0%
is satisfied.

### Claim 4 (depends on 1)

The non-oriented electrical steel sheet according to claim 1, wherein, in the chemical composition,
Cr: 0.2% to 10.0%
is satisfied.