MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202617098668 A) filed by Jfe Steel Corporation on August 14, 2026, for Hot-Rolled Annealed Sheet, Method For Producing Same, And Method For Producing Non-Oriented Electromagnetic Steel Sheet.
Inventors include Maruyama Shigehiro; Tanaka Takaaki; Saito Hayato; and Okubo Tomoyuki.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: Provided is a hot-rolled annealing technique for an electromagnetic steel sheet having excellent cold rolling properties. The present invention provides a hot-rolled annealed sheet that has a component composition containing, in terms of mass%, 0.010% or less of C, 1.0-5.0% of Si, 0.05-5.0% of Mn, 0.10% or less of P, 0.010% or less of S, 3.0% or less of Al, 0.0080% or less of N, and 0.0050% or less of O, with the balance being Fe and unavoidable impurities, and in which the ratio Re/Rc of the recrystallized structure between a sheet width center section and an edge section is 0.95 or less. The present invention also provides a method for producing a hot-rolled annealed sheet, in which: a hot-rolled sheet is obtained by subjecting a steel material having the above component composition to hot rolling; the hot-rolled sheet is subjected to hot-rolled sheet annealing; when a sheet width center section of the hot-rolled sheet is heated from the normal temperature to holding temperature and held thereat during the hot-rolled sheet annealing, an edge section of the hot-rolled sheet reaches a maximum temperature, which is lower than the holding temperature, from the normal temperature; and the temperature rising rate Vc of the sheet width center section is increased by 1.0°C/s or more from the temperature rising rate Ve of the edge section.
Disclaimer: Curated by HT Syndication.
