Xiemo steel and a process for preparing a thin slab cutting production

Production of a thin slab steel cutting shoe mold, the components and wt%: C: 0.28 ~ 0.38%, Si: 0.25 ~ 0.45%, Mn: 1.00 ~ 1.40%, P≤0.007%, S≤0.003%, Als : 0.01 ~ 0.035%, Cr: 0.20 ~ 0.40%, V: 0.02 ~ 0.10%, B: 0.0010 ~ 0.0016%, Ca: not more than 0.005%, and controls: N≤0.006, As≤0.03; Sb≤0.01; Sn ≤0.02; Pb≤0.01; Bi≤0.01; and satisfies: Ca / S is not less than 1.5,1.50% ≤C + Mn≤1.70%; preparation process: smelting and refining; continuous casting; soaking of the slab; thermal rolling; cooling to the coiling temperature; winding; slowly cooled to room temperature. Rp0.2 the present invention is not more than 500MPa, Rm does not exceed 680MPa, A≥19%, HB: 150 ~ 200, measured from the board edge strip crown 10mm ≤30um, finished cutting times is not less than 20,000 times, the double-sided decarburization layer is not greater than 3% of the thickness of the strip.