Non-oriented electrical steel sheet
AssigneeNippon Steel Corporation
InventorsTakeru ICHIE, Masaru TAKAHASHI, Fuminobu MURAKAMI, Shinichi MATSUI, Masahiro YAMAMOTO
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Abstract
A non-oriented electrical steel sheet includes a silicon steel sheet and an insulation coating. When t is a thickness of the silicon steel sheet and when PDR is defined as (PDR=(maximum−minimum)/minimum×100) which indicates a ratio concerned with maximum and minimum of number densities of AlN precipitates in three areas which are 1/10t area, ⅕t area, and ½t area from a surface of the silicon steel sheet along a thickness direction, the PDR is 50% or less.
Claims5
A non-oriented electrical steel sheet comprising a silicon steel sheet and an insulation coating, wherein
- the silicon steel sheet includes, as a chemical composition, by mass %,
- 0.01 to 3.50% of Si,
- 0.0010 to 2.500% of Al,
- 0.01 to 3.00% of Mn,
- 0.0030% or less of C,
- 0.180% or less of P,
- 0.0030% or less of S,
- 0.0030% or less of N,
- 0.0020% or less of B, and
- a balance consisting of Fe and impurities, and
- when t is a thickness of the silicon steel sheet and when PDR is defined as a following (expression 1) which indicates a ratio concerned with maximum and minimum of number densities of AlN precipitates in three areas which are 1/10t area, ⅕t area, and ½t area from a surface of the silicon steel sheet along a thickness direction,
- the PDR is 50% or less,
- wherein the PDR=(the maximum−the minimum)÷the minimum×100 (expression 1).
A non-oriented electrical steel sheet comprising a silicon steel sheet and an insulation coating, wherein
- the silicon steel sheet includes, as a chemical composition, by mass %,
- 0.01 to 3.50% of Si,
- 0.0010 to 2.500% of Al,
- 0.01 to 3.00% of Mn,
- 0.0030% or less of C,
- 0.180% or less of P,
- 0.0030% or less of S,
- 0.0030% or less of N,
- 0.0020% or less of B, and
- a balance comprising Fe and impurities, and
- when t is a thickness of the silicon steel sheet and when PDR is defined as a following (expression 1) which indicates a ratio concerned with maximum and minimum of number densities of AlN precipitates in three areas which are 1/10t area, ⅕t area, and ½t area from a surface of the silicon steel sheet along a thickness direction,
- the PDR is 50% or less,
- wherein the PDR=(the maximum−the minimum)÷the minimum×100 (expression 1).
Dependencies are inferred from the claim text.