High-strength and high-elongation strapping steel and manufacturing method thereof

Abstract

The invention discloses high-strength and high-elongation strapping steel and a manufacturing method thereof, and relates to the field of metal materials, and the high-strength and high-elongation strapping steel comprises the following chemical components in percentage by weight: 0.08%-0.12% of C, 0.90%-1.10% of Si, 1.40%-1.60% of Mn, 0.06%-0.08% of P, less than or equal to 0.015% of S, 0.02%-0.04% of Ti, 0.020%-0.050% of Als and the balance of Fe and inevitable impurities. The preparation technology comprises the steps of molten iron pretreatment, converter treatment, alloy fine tuning station treatment, LF treatment, continuous casting, hot rolling, controlled cooling, acid pickling, cold rolling, bluing and finished product obtaining. According to the invention, low C, high Mn and high Si are adopted, and a small amount of P element and micro Ti are matched, so that the final material strength can reach that the tensile strength is greater than or equal to 1080MPa, and the A50 ductility is greater than or equal to 10%. And the C element content is low, and welding is facilitated.

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