Abstract: The 12 mm steel plate (0.09C,0.28Si, 1.12Mn,0.020P,0.006S,0.58Cr,0.25Ni,0.32Cu,0.045Nb, 0.030Ti) for the bogie frame of high-speed train was successfully developed by hot metal pretreatment -260 t BOF-LF-RH- 170 mm slab casting-rolling process and TMCP (finished rolling at 850℃ fast cooling to 720℃ ,air cooling). It shows excellent low-temperature impact toughness (impact energy at -60℃ 166 ~ 255 J) , and all properties meets the requirements of YB/T 4684-2018. The microstructure consists of a large amount of polygonal ferrite and a small amount of pearlite. The atmospheric corrosion resistance index I is 6.3 ~6.7,and the relative corrosion rate of the steel plate is 54.7% com¬pared with Q345B by 72 h periodic alternate immersion and dry corrosion test. The surface of the rust layer is very dense. The atmospheric corrosion resistance of the steel plate is excellent.

摘要： 通过铁水预处理-260 t BOF-LF-RH-170mm板坯连铸-轧制流程,结合相应的控轧控冷工艺终轧850℃快冷至720℃空冷,成功研制12mm高速列车转向架构架用钢板(/%:0.09C,0.28Si,1.12Mn,0.020P,0.006S,0.58Cr,0.25Ni,0.32Cu,0.045Nb,0.030Ti),低温韧性优异(-60℃冲击功166～255 J),各项指标满足YB/T 4684-2018要求;显微组织为大量多边形铁素体和少量珠光体;钢板耐大气腐蚀指数I为6.3～6.7,在72 h周期浸润腐蚀试验中相对于Q345B的腐蚀速率为54.7%,锈层表面致密,耐大气腐蚀性能良好。

关键词: 高速列车转向架构架用钢, 低温韧性, 周期浸润, 耐大气腐蚀