HOT STRAIGHT THICK-GAUGE PLATE FORMED BY PUMPING THE PRODUCT AND METHOD OF MANUFACTURING FORMED BY STAMPING THE PRODUCT Russian patent published in 2017 - IPC C22C38/60 C22C38/14 C21D9/46 C21D1/18 B21D22/20 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely hot-stamped plate steel, suitable for producing a stamped article. Steel contains wt %: C: 0.15 to 0.5, Si: 0.2 to 3, Mn: 0.5 to 3, P: 0.05 or less (except 0), S: 0.05 or less (except 0), Al: 0.01 to 1, B: of 0.0002 to 0.01, N: 0.001 to 0.01, Ti: in the amount equal to or greater than 3.4[N]+0.01 and equal to or less than 3.4[N]+0.1, where [N] is the content (wt %) N, the rest are iron and unavoidable impurities. The average diameter of the equivalent circle of Ti-containing inclusions having an equivalent circle diameter of 30 nm or less among the Ti-containing inclusions contained in the steel sheet is 6 nm or more. The amount of Ti in the inclusions and the total amount of Ti in the steel satisfy the ratio: (the amount of Ti in the inclusions (wt %)-3.4[N]) < 0.5[×(Total amount of Ti (wt %)) - 3.4[N]], where [N] is the content (wt %) N in the steel. The share of ferrite in the metallographic microstructure is 30% or more.

EFFECT: products have excellent characteristics of softening resistance in the heat affected zone and the required ratio between high strength and elasticity.

6 cl, 1 dwg, 16 tbl, 2 ex