摘要
使用实验轧机旁冷却装置配合轧机进行轧制实验,研究轧制道次间不同冷却工艺对特厚钢板组织和性能的影响规律.研究结果表明:采用道次间冷却工艺可以在全厚度方向获得组织细化及强韧性提高效果,采用强冷道次间冷却实验钢1/4处晶粒尺寸可细化至10μm,强度为376 MPa,-40℃冲击功为169 J;心部晶粒尺寸可细化至15μm,强度为360 MPa,-40℃冲击功为123 J.本工艺可形成470μm厚表层细晶层,晶粒尺寸可细化至5μm;粗轧道次间插入冷却工艺轧制钢板强度和冲击韧性优于中间坯冷却工艺;随冷却强度增加,钢板内部组织明显细化且强度大幅提高.
By using a cooling device beside the laboratorial rolling mill,an inter-pass cooling(IPC)process was applied during rolling ultra-heavy steel plate.Here,the effect of the IPC process on microstructure and properties of the rolled plate was studied.The results showed that the steel plate has excellent strength and toughness after the IPC process.When the rolled plate is applied by a strong IPC process,the grain size is 10μm,the strength is 376 MPa and the impact energy at-40℃is 169 J at the 1/4-thickness,while they become 15μm,360 MPa and 123 J respectively at the 1/2-thickness.Meanwhile,a surface ultra-fine grain layer with the thickness of 470μm can be obtained and the average grain size is less than 5μm.The strength and toughness of the rolled plate are better in a strong IPC process than those in the inter-slab cooling process.When the intensity of the IPC process increases,the grain size decreases and the strength increases.
作者
吴俊宇
王斌
王丙兴
王昭东
WU Jun-yu;WANG bin;WANG Bing-xing;WANG Zhao-dong(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第11期1582-1587,共6页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51604074)
中央高校基本科研业务费专项资金资助项目(N170704012)
国家重点研发计划项目(2016YFB0300602)
关键词
道次间冷却
差温轧制
特厚板
晶粒细化
变形渗透
表层细晶层
inter-pass cooling(IPC)
temperature gradient rolling
ultra-heavy steel plate
grain refinement
deformation penetration
surface fine grain layer
作者简介
吴俊宇(1989-),男,辽宁铁岭人,东北大学博士研究生;王昭东(1968-),男,安徽怀宁人,东北大学教授,博士生导师.
