MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202617095678 A) filed by Jfe Steel Corporation on August 07, 2026, for Method For Cold Rolling Grain-Oriented Electromagnetic Steel Sheet, Method For Manufacturing Same, And Cold Rolling Equipment Train.
Inventors include Shingaki Yukihiro; Nagai Yu; Okubo Tomoyuki; and Arakawa Tetsuya.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: Provided is a technique that makes it possible, when performing cold rolling using a single-stand rolling mill, to stably and productively manufacture a grain-oriented electromagnetic steel sheet having exceptional magnetic characteristics. The present invention provides a method for cold rolling a grain-oriented electromagnetic steel sheet, a method for manufacturing a grain-oriented electromagnetic steel sheet using the aforementioned cold rolling method, and a cold rolling equipment train used for the aforementioned cold rolling. In said method for cold rolling a grain-oriented electromagnetic steel sheet, the cold rolling is divided into primary cold rolling and secondary cold rolling when a cold-rolled sheet of a final sheet thickness is obtained by cold rolling in which the total rolling reduction rate is 80% or greater. In the primary cold rolling, said steel sheet is rolled to an intermediate sheet thickness using a tandem rolling mill, and in the secondary cold rolling, said steel sheet is rolled from the intermediate sheet thickness to the final sheet thickness by 1- to 3-pass rolling using a single-stand rolling mill having a work roll diameter such that the ratio thereof with respect to the work roll diameter of the final stand of the tandem rolling mill used for the primary cold rolling is 0.30-0.95, whereby the optimal value of the sheet-width-direction magnetic flux density B8 of the end-product sheet is 1.920 T or greater.
Disclaimer: Curated by HT Syndication.
