high-strength steel wire rod with good low temperature impact toughness and production method thereof

The invention discloses a high-strength steel wire rod with good low temperature impact toughness and a production method of the high-strength steel wire rod. The high-strength steel wire rod contains the following steel type components by weight percent: 0.30%-0.50% of C, 0.10%-0.40% of Si, 0.70%-1.00% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 0.70%-1.20% of Cr, 0.10 %-0.30% of Mo, and the balance of Fe and trace impurities. The high-strength steel wire rod contains small and uniform in crystalline grains, and is low in ductile-brittle transition temperature, and has high material strength and toughness. The high-strength steel wire rod is free of other precious metals, is low in heat treatment cost, and has the characteristics of low production cost and low using cost. The method controls the austenitizing degree and phase change temperature by adjusting the temperatures of heating, finish rolling and spinning, as well as cooling speed, and the low temperature ...