细晶强化Q345中板的控轧控冷工艺研究  

Research of controlled rolling and accelerated cooling process of Q345 plate for grain refinement strengthening

作　　者：范建文[1] 易敏[1] 陈明跃[1] 朱伏先[2] 赵胜国[3] 

机构地区：[1]首钢集团总公司技术研究院,北京100041 [2]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [3]首钢集团总公司中厚板厂,北京100041

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)

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 PlantDuring 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

关 键 词：Q345钢 中板 控制轧制 控制冷却 组织细晶化 

分 类 号：TG335[金属学及工艺—金属压力加工]