MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202617098557 A) filed by Nippon Steel Corporation on August 14, 2026, for Grain-Oriented Electrical Steel Sheet And Method For Manufacturing Same.
Inventors include Nakamura Shuichi; Morimoto Shota; Okada Shingo; Okumura Shunsuke; and Yamamoto Shinji.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: This grain-oriented electrical steel sheet has a base steel sheet, an optional glass coating film that is formed on the surface of the base steel sheet, and an optional insulating coating film that is formed on the surface of the base steel sheet or on the surface of the glass coating film. The base steel sheet has a chemical composition that contains, in terms of mass%, 0.0005-0.0050% of C, 1.0-7.0% of Si, 0.0030-0.0300% in total of one or more elements selected from among Nb group elements that are Nb, Ta, V, and Mo, 0.0001-0.0300% of acid-insoluble Al, 0.0001-0.0200% of Mg, 0.0001-0.0200% of O, and 0.0001-0.0100% of N. In a region of the base steel sheet ranging from a position of t/20 from the surface to a position of (19t)/20 from the surface, the number ratio of the precipitates that are in the form of composite precipitates and have a region in which the Nb group element is detected as a first peak by EDS analysis is 50% or more with respect to all the precipitates that contain the Nb group element.
Disclaimer: Curated by HT Syndication.
