A High Strength Hot Rolled Steel Sheet And A Method Of Manufacturing

A High Strength Hot Rolled Steel Sheet And A Method Of Manufacturing Thereof

Abstract: A HIGH-STRENGTH HOT-ROLLED STEEL SHEET AND A METHOD OF MANUFACTURING THEREOF The present disclosure discloses a method for producing high-strength hot-rolled steel sheet. The method includes casting a steel slab of defined composition. Then, heating, the steel slab to a first predetermined temperature for a first predetermined time, followed by hot working to produce a steel sheet. The hot working includes deforming, the steel slab in a first hot working process at second predetermined temperature and a second hot working process at third predetermined temperature. After hot working, the steel is held at third predetermined temperature for a second predetermined time, followed by cooling to a fourth predetermined temperature. Then the cooled steel is subjected to coiling at fourth predetermined temperature to obtain the high-strength hot-rolled steel sheet. The microstructure of the steel thus manufactured comprises polygonal ferrite, bainitic ferrite and martensite-austenite islands or cementite and exhibits tensile strength greater than 780 MPa, good stretch flangeability and high ductility. Figure. 1

Patent Information

Application #

Filing Date

11 December 2023

Publication Number

24/2025

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

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