MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202617048731 A) filed by Jfe Steel Corporation on April 16, 2026, for Hot Rolling Method, Production Method For Hot-Rolled Coil, And Production Method For Grain- Oriented Electromagnetic Steel Sheet.

Inventors include Shingaki Yukihiro; Kubomura Ryota; Ogasahara Tomoyoshi; Shimoyama Yusuke; and Yamada Kuni.

The application for the patent was published on June 26, 2026, under issue no. 26/2026.

Abstract: Provided is a hot rolling method that makes it possible to give a hot-rolled coil a favorable shape. The present invention is a hot rolling method that involves heating a slab at a heating furnace before hot rolling the slab. The temperature of the slab is raised to the highest temperature T1 (°C) to be reached by the slab inside the heating furnace at least 10 minutes before the slab is extracted from the heating furnace, and the temperature of the slab at extraction from the heating furnace is set to T2 (°C), where T1=1200, and T2=T1-20. The slab has a component composition that makes the ? phase percentage at T1 (°C) no more than 10 mol%.

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