本发明提供了一种390MPa级高速列车转向架用耐候钢板及其制造方法，该钢板的成分按重量百分比计如下：C：0.092％～0.12％、Si：0.32％～0.42％、Mn：1.42％～1.58％、P≤0.015％、S≤0.008％、Cr：0.51％～0.65％、Ni：0.26％～0.36％、Cu：0.25％～0.41％、Zr：0.02％～0.05％，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80～100mm；制造方法包括冶炼→连铸→板坯堆垛→加热→轧制→冷却；应用本发明生产的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，完全满足我国南北地域的巨大温度差异、不同地区不同气候的腐蚀条件以及复杂多样的运行路况要求，保证高速列车的运行品质和行车安全。

The invention provides a 390 MPa grade weathering steel plate for high-speed train bogie and its manufacturing method. The composition of the steel plate is as follows by weight percentage : C : 0.092 % -0.12 %, Si : 0.32 % -0.42 %, Mn : 1.42 % -1.58 %, P ≤ 0.015 %, S ≤ 0.008 %, Cr : 0.51 % -0.65 %, Ni : 0.26 % -0.36 %, Cu : 0.25 % -0.41 %, Zr : 0.02 % -0.05 %. 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 80 ~ 100mm ; manufacturing methods include smelting → continuous casting → slab stacking → heating → rolling → cooling ; the steel plate produced by the application of the invention has excellent weather resistance, cold forming performance, low temperature toughness, welding performance and uniform and pure internal quality, which fully meets the huge temperature difference between the north and south regions of China, the corrosion conditions of different regions and different climates, and the requirements of complex and diverse running road conditions, and ensures the running quality and driving safety of high-speed trains.