MUMBAI, India, June 13 -- Intellectual Property India has published a patent application (202517049003 A) filed by Jfe Steel Corporation, Tokyo, on May 21, for 'hot-rolled steel sheet and method for producing same.'
Inventor(s) include Kosaka Noriaki; and Matsuda Hiroshi.
The application for the patent was published on June 13, under issue no. 24/2025.
According to the abstract released by the Intellectual Property India: "Provided is a hot-rolled steel sheet having a yield strength (YS) of 680 MPa or greater and having excellent bendability and toughness, and a method for producing the same. The hot-rolled steel sheet has a component composition consisting of components selected as desired from C, Si, Mn, P, S, Al, N, and Ti, and a metal structure having: an area ratio of ferrite from 0% to 85%; an area ratio of the total remaining austenite of 3% or less; an area ratio of structures having a lath form of 5% or less; and an area ratio of structures having a KAM value of 1.0 or less of 15% or more. The yield strength thereof, including carbide containing Ti having an average particle size of 8 nm or less, is 680 MPa or greater. Additionally, the method for producing the hot-rolled steel sheet comprises: a step for rough-rolling, with or without heating, a steel material having the abovementioned component composition; a step for finish-rolling the steel material at an initial temperature of 950 C or higher, a total rolling reduction rate from a first pass to a fifth pass of 75% or greater, and an end temperature from 860 C to 910 C; a step for cooling; and a step for winding."
The patent application was internationally filed on Sept. 19, 2023, under International application No.PCT/JP2023/033819.
Disclaimer: Curated by HT Syndication.
