高速列车转向架构架用Nb-Ti微合金化钢板的研制  

Development of Nb-Ti Microalloying Steel Plate for Bogie Frame of High-speed Train

作　　者：张瑞琦 刘志伟 孙傲 郭晓宏 杨玉 严平沅 高磊 Zhang Ruiqi;Liu Zhiwei;Sun Ao;Guo Xiaohong;Yang Yu;Yan Pingyuan;Gao lei(Ansteel Iron and Steel Research Institute,Anshan 114009)

机构地区：[1]鞍钢集团钢铁研究院

出　　处：《特殊钢》2020年第1期32-35,共4页Special Steel

基　　金：十三五国家重点研发计划(2017YFB0304600)资助

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。The 12mm steel plate(0.09 C,0.28 Si,1.12 Mn,0.020 P,0.006 S,0.58 Cr,0.25 Ni,0.32 Cu,0.045 Nb,0.030 Ti)for the bogie frame of high-speed train was successfully developed by hot metal pretreatment-260 t BOF-LF-RH-170mm 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%compared with Q345 B 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.

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 

分 类 号：TF76[冶金工程—钢铁冶金]