本发明提供了一种韧性优异的高速列车转向架用钢板及其制造方法，该钢板的成分按重量百分比计如下：C：0.071％～0.091％、Si：0.21％～0.31％、Mn：1.00％～1.25％、P≤0.015％、S≤0.008％、Cr：0.30％～0.50％、Ni：0.10％～0.25％、Cu：0.21％～0.41％、Zr：0.01％～0.04％，Nb：0.015％～0.045％、V:0.020％～0.040％、Ti：0.01％～0.02％、Al：0.020％～0.050％，余量为Fe和不可避免的杂质；钢板厚度为12～50mm。制造方法包括冶炼→连铸→板坯堆垛→板坯加热→轧制→冷却；应用本发明生产的的高速列车转向架用钢板具有优良的耐候性、冷成形性能、低温韧性、焊接性能和均匀纯净的内部质量。

The invention provides a steel plate with excellent toughness for high-speed train bogie and a manufacturing method thereof. The composition of the steel plate is as follows by weight percentage : C : 0.071 % -0.091 %, Si : 0.21 % -0.31 %, Mn : 1.00 % -1.25 %, P ≤ 0.015 %, S ≤ 0.008 %, Cr : 0.30 % -0.50 %, Ni : 0.10 % -0.25 %, Cu : 0.21 % -0.41 %, Zr : 0.01 % -0.04 %. Nb : 0.015 % – 0.045 %, V : 0.020 % – 0.040 %, Ti : 0.01 % – 0.02 %, Al : 0.020 % – 0.050 %, and the amount of Fe and inevitable impurities ; the thickness of steel plate is 12 ~ 50mm. Manufacturing methods include smelting → continuous casting → slab stacking → slab heating → rolling → cooling ; the steel plate for high-speed train bogie produced by the invention has excellent weather resistance, cold forming performance, low temperature toughness, welding performance and uniform and pure internal quality.