Non-oriented electrical steel sheet and method of manufacturing the same
AssigneePosco
InventorsJunesoo Park, Byung-Keun Bae, Yong-Soo Kim, Su-Yong Sin
Life of this patent
Estimating the term…
Abstract
Disclosed are a non-oriented electrical steel sheet and a method of manufacturing the same. The non-oriented electrical steel sheet of the present invention includes 0.005 wt % or less of C, 1.0-4.0 wt % of Si, 0.1-0.8 wt % of Al, 0.01-0.1 wt % of Mn, 0.02-0.3 wt % of P, 0.005 wt % or less of N, 0.001-0.005 wt % of S, 0.005 wt % or less of Ti, 0.01-0.2 wt % of at least one of Sn and Sb, and the remainder including Fe and other impurities unavoidably added thereto, wherein Mn, Al, P, and S may respectively fulfill the empirical formula 0.8≤{[Mn]/(100*[S])+[Al]}[P]≤40, wherein [Mn], [Al], [P], and [S] respectively refer to weight percentages of Mn, Al, P, and S.
Claims5
A non-oriented electrical steel sheet comprising:
- 0.005 wt % or less of C,
- 1.0-4.0 wt % of Si,
- 0.1-0.8 wt % of Al,
- 0.01-0.05 wt % of Mn,
- 0.02-0.3 wt % of P,
- 0.005 wt % or less of N,
- 0.0012-0.005 wt % of S,
- 0.005 wt % or less of Ti,
- 0.01-0.2 wt % of at least one of Sn or Sb,
- the remainder including Fe and other impurities unavoidably added thereto,
- wherein Mn, Al, P, and S respectively fulfill an empirical formula below:
- 0.8≤{[Mn]/(100*[S])+[Al]}/[P]≤40,
- wherein [Mn], [Al], [P], and [S] respectively refer to weight percentages of Mn, Al, P, and S, and
- wherein a ratio to (NS≥0.1μm/NTot) between a number of MnS, CuS, and (Mn, Cu)S complex sulfides (NS≥0.1μm) having a size of 0.1 μm or greater and a total number of inclusions (NTot) having a size of 0.01-1 μm is 0.5 or greater.
Dependencies are inferred from the claim text.