有限元模拟在板坯直装及热装中的应用  

Application of Finite Element Simulation in DHCR and HCR

作　　者：于洋[1] 王畅[1] 王林[1] 徐海卫[1] 苏岚[2] 曹恒[3] 

机构地区：[1]首钢技术研究院薄板研究所,北京100043 [2]北京科技大学材料科学与工程学院,北京100083 [3]首钢迁安钢铁有限责任公司热轧作业部,河北迁安064404

出　　处：《中国冶金》2014年第1期41-46,共6页China Metallurgy

摘　　要：连铸坯处在γ＋α两相区装炉加热，会导致带钢心部混晶，对带钢组织及力学性能造成不利影响。以SS400钢种为例，通过有限元分析，模拟了首钢迁钢2250mm生产线紧凑型布局下连铸坯直装及热装下的温度场，并结合实际测量进行了校验。直装情况下连铸坯经切割后到达加热炉入口实际约需要15min，此时铸坯心部温度830～860℃，表面温度779～803℃，均基本处在7＋d两相区内，应予以避免。热装情况下，连铸坯下线倒坯堆冷时间应不低于2．8h，这样才能保证板坯心部温度低于700℃以完成α相变。Charging of continuous casting slab in γ＋α phase region will lead to the core mixed crystal of hot rolled strip, which will do harm to the microstructure and mechanical properties of the strip. In this work, through the finite element simulation, the temperature field of DHCR and HCR slab is calculated with the steel grade of SS400 in the condition of 2 250mm production line of Shougang Qiangang company which is built with compact layout. After cutting, it takes about 15min for DHCR slab to arrive at the entrance of furnace, and now the core and surface temperature of slab is about 830-860℃ and 779- 803℃ respectively, which are both located in 74-α phase zone. In hot charging case, the time of air cooling of slab should be more than 2.8 h to guarantee that the core temperature of slab is below 700℃ and the α phase transition has completed.

关 键 词：热轧 直装 热装 有限元模拟 

分 类 号：TF777[冶金工程—钢铁冶金]