Non-oriented electrical steel sheet and manufacturing method therefor
AssigneeJfe Steel Corporation
InventorsHiroaki Nakajima, Masanori Uesaka, Yoshiaki Zaizen, Tomoyuki Okubo, Yoshihiko Oda
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Abstract
Disclosed is a non-oriented electrical steel sheet low in iron loss that is substantially free of Al and contains large amounts of Si and Mn. The disclosed non-oriented electrical steel sheet has a chemical composition containing C: 0.0050% or less, Si: 2.0% to 6.0%, Mn: 1.0% to 3.0%, P: 0.20% or less, S: 0.0050% or less, N: 0.0050% or less, and Al: 0.0050 % or less, with the balance being Fe and inevitable impurities, in which Si—Mn nitrides having an average diameter of 50 nm to 500 nm has a number density of 1/μm3 or less.
Claims20
A non-oriented electrical steel sheet comprising a chemical composition containing, by mass %,
- C:
- 0.0050% or less,
- Si:
- 2.0% to 6.0%,
- Mn:
- 1.0% to 3.0%,
- P:
- 0.20% or less,
- S:
- 0.0050% or less,
- N:
- 0.0050% or less, and
- Al:
- 0.0050% or less,
- with the balance being Fe and inevitable impurities, wherein Si—Mn nitrides having an average diameter of 50 nm to 500 nm has a number density of 1/μm3 or less.
Dependencies are inferred from the claim text.