MUMBAI, India, March 14 -- Intellectual Property India has published a patent application (202617019997 A) filed by Hyundai Steel Company, Incheon, Republic of Korea, on Feb. 20, for 'non-oriented electrical steel sheet and manufacturing method therefor.'
Inventor(s) include Ahn, Yong Keun; Yoo, Seong Hyeon; and Lee, Dong Hee.
The application for the patent was published on March 13, under issue no. 11/2026.
According to the abstract released by the Intellectual Property India: "A method for manufacturing a non-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: (a) preparing steel that is a half-finished product comprising 2.5-3.8 wt% of silicon (Si), 1.45 wt% or more of nickel (Ni), 0.05 wt% or less of aluminum (Al) and the balance of iron (Fe) and other inevitable impurities; (b) hot rolling the steel, thereby forming a hot-rolled steel sheet; (c) cold rolling the hot-rolled steel sheet, thereby forming a cold-rolled steel sheet; and (d) cold roll annealing the cold-rolled steel sheet, wherein step (d) comprises the steps of: (d-1) increasing the temperature from room temperature to a first temperature at which austenite phase is stable, and then maintaining same for a first set time; (d-2) lowering the temperature to a second temperature at which a two-phase region where austenite phase and ferrite phase coexist is stable, and then maintaining same for a second set time; and (d-3) lowering the temperature to room temperature, and the phase transformation heat treatment in the cold rolling annealing step can improve the texture such that an orientation favorable to magnetism is developed, and can enhance magnetic properties."
The patent application was internationally filed on July 17, 2024, under International application No.PCT/KR2024/010247.
Disclaimer: Curated by HT Syndication.
