TH166376A - High strength hot rolled steel plate And methods for the production of steel sheets - Google Patents

Abstract

What it provides is a high strength hot rolled steel sheet with a stable of material quality and condition. Excellent weldability And methods for producing steel It has achieved a high-strength hot-rolled steel sheet with a tensile strength of 980 MPa or greater, which is excellent in terms of material quality stability and weld condition by obtaining a chemical composition containing C. 0.09% or more and 0.17% or less Si: greater than 1.0% and 1.6% or less Mn: 1.5% or more and 2.5% or less P: 0.03% or less S: 0.005% or less Al: 0.08 % Or less, N: 0.0080% or less, Ti: 0.09% or more, and 0.14% or less, V: 0.05% or more, and 0.25% or less, Cr, Ni, and Mo: each element is limited to 0.06% or less. Than (including 0%) by mass and fraction, resulting in a Fe balance and unavoidable impurities. And the microstructure, including phase benite, in the amount of 80% or more in the term ratio by area. In which the amount of Fe precipitates is 0.50% or less:

Claims (1)

1.1.05% or more and 0.25% or less Cr, Ni and Mo: each element is limited to 0.06% or less.