摘要
采用Q345连铸板坯,在首钢3300mm轧机上进行了中板细晶化实验,研究了轧制温度、变形量分配、待温时冷却方式和精轧中的强制冷却对板材组织性能的影响。结果表明,精轧开轧温度在870～910℃左右,同时待温期间采用水幕冷却,可使厚12mm板的铁素体晶粒达到9级以上,σs>420MPa;采用较低精轧开轧温度及终轧后水幕冷却,可使厚20mm板铁素体晶粒为8 5～9级,σs=370～380MPa;强化精轧段的水冷,可使厚20mm板铁素体晶粒达9级以上,σs>400MPa。
Industrial experiments of Q345 plates for grain refinement strengthening were carried out with continuous casting slabs on the 3300mm rolling mill in the Shougang Plate Rolling PlantDuring the experiments,the influence factors,such as the deformation temperature,deformation amount allocation among the steps,cooling methods between roughing and finishing rolling and accelerated cooling method during the finishing rolling,on the microstructure and mechanical properties of the plates were studied
出处
《轧钢》
2003年第1期11-14,32,共5页
Steel Rolling
基金
北京市科技新星计划资助项目(H013610320111)
关键词
Q345钢
中板
控制轧制
控制冷却
组织细晶化
Q345 steel
plate
controlled rolling
accelerated cooling
ferrite grain refinement
