MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202617093829 A) filed by Jfe Steel Corporation on August 03, 2026, for Hot-Rolled Steel Sheet And Method For Producing Same.
Inventors include Kosaka Noriaki; and Matsuda Hiroshi.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: Provided are: a hot-rolled steel sheet having a yield strength of 700 MPa or more and excellent ductility and shear properties; and a method for producing the hot-rolled steel sheet. This hot-rolled steel sheet has a component composition of C, Si, Mn, P, S, Al, N, Ti, and an optional component, and has (area ratio of KAM value of 1.0- 4.0 inclusive)/(area ratio of KAM value of less than 1.0) of 0.05 or more, a coefficient of variation of crystal grain size of 0.55 or more, a solid solution Ti content existing in steel of 0.03% or less, an average particle diameter of carbide containing Ti of 10 nm or less, a yield strength of 700 MPa or more, and a uniform elongation of 8.5% or more. This method for producing a hot-rolled steel sheet includes: a rough rolling step for subjecting a steel material having the component composition to rough rolling after heating or without heating after casting, wherein a rough rolling completion temperature is 1,000°C-1,100°C inclusive; a finish rolling step in which a rolling start temperature is 950°C or higher, and the total draft of the first pass and the second pass is 70% or less; a cooling step; a winding step; and a post-winding coil cooling step.
Disclaimer: Curated by HT Syndication.
