METHOD FOR MANUFACTURING HIGH-STRENGTH COLD-ROLLED/HOT-ROLLED TRIP STEEL HAVING A TENSILE STRENGTH OF 590 MPA GRADE, SUPERIOR WORKABILITY, AND LOW MECHANICAL-PROPERTY DEVIATION

摘要

The aim of the present invention is to provide a method for manufacturing high-strength cold-rolled TRIP steel having a tensile strength of 590 MPa grade and low mechanical-property deviation, in which a thin-slab casting technique is employed to ensure superior workability and also significantly reduce widthwise and lengthwise mechanical-property deviation in a strip.