TH177988A - Hot Rolled Steel Plates and Methods for Producing Hot Rolled Steel Plates - Google Patents

Abstract

------ 14/04/2016 ------ (OCR) page 1 of number 1 page invention summary. Hot-rolled steel sheet where the formation of the internal oxidized layer is also creased, and which will have The excellence in workability will be provided. Hot rolled steel sheet as in this shape. There will be a chemical composition, in% by mass, C0.07 to 0.30%, Si: greater than 1.0 to 2.8%, Mn: 2.0 to 3.5%, P: 0.030% or less, S: 0.010% or less. Over, Al: 0.01 to less than 1.0%, N: 0.01% or less, O: 0.01% or less, and one or more selected from the group containing Sb, Sn and Te in total volume 0.03 to 0.30%. , With residual Fe and impurities, and corresponding to formula (1) the microstructure of the hot-rolled steel plate includes ferrite and pearlite in total quantities 50% of the area or more. The tensile strength of hot rolled steel sheets is 900 Mpa or less, Si + Mn> 3.20 (1) where, the content (% by mass) of the corresponding element is substituted for each element symbol in the formula. (1) ------------:

Claims (1)

1.01% or less, O: 0.01% or less, and one or more selected from the total content of Sb, Sn and Te group 0.03 to 0.30%, with residual Fe and impurity, and where Consistent with formula (1), the microstructure of the hot rolled steel sheet includes ferrites and pearlite in total quantities 50% of the area or more. The tensile strength of hot rolled steel sheets is 900 Mpa or less, Si + Mn> 3.20 (1) where, the content (% by mass) of the corresponding element is substituted for each element symbol in the formula. (1) ------------ Disclaimer (item one) which will appear on the advertisement page: ------ 14/04/2016 ------ (OCR) Page 1 of the number 4 pages. 1.01% or less, O: 0.01% or less, Sb: 0.03 to 0.30%, Ti: 0 to 0.15%, V: 0 to Tag: