河北津西钢铁中小型半连轧大规格Q355D热轧H型钢实践  

PRACTICE OF Q355D HOT-ROLLED H-SHAPED STEEL IN MEDIUM AND SMALL-SIZED SEMI-CONTINUOUS ROLLING AT JINXI IRON AND STEEL

作　　者：马永福[1] 胥明旺 叶高旗[1] 马云飞 纪广胜 王文正 田亚强 Ma Yongfu;Xu Mingwang;Ye Gaoqi;Ma Yunfei;Ji Guangsheng;Wang Wenzheng;Tian Yaqiang(Hebei Jinxi Iron and Steel Group Co.,Ltd.,Tangshan,Hebei 064300,China;Key Laboratory of the Ministry of Education for Modern Metallurgy Technology,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]河北津西钢铁集团股份有限公司,河北唐山064300 [2]华北理工大学教育部现代冶金技术重点实验室,河北唐山063210

出　　处：《冶金信息导刊》2021年第5期36-39,共4页Metallurgical Information Review

摘　　要：为提升河北津西钢铁集团股份有限公司中小型半连轧生产线大规格Q355D热轧H型钢的力学性能,尤其是冲击韧性及其稳定性,采用Nb、V微合金化成分优化设计、加热制度有限元模拟、轧制温度和轧制速度等窄范围控制手段,在该公司2、3号生产线进行了该系列大规格(450×200、400×200)产品的工业生产实践。结果表明,采用添加Nb、V合金元素,低温长时间加热的基本原则,适当缩短在炉时间、降低精轧开轧温度或降低均热温度、提升轧制速度(提升精轧轧制温度)等,可使Q355D热轧H型钢力学性能满足国标要求。In order to improve the mechanical properties,especially the impact toughness and stability of the large-sized Q355D hot-rolled H-beam in the small and medium-sized semi-continuous rolling line of Hebei Jinxi Iron and Steel Group Co.,Ltd.,the industrial production practice of this series of products with large specifications(450×200,400×200)was carried out in the No.2 and No.3 production lines of the company by means of optimizing the composition of Nb and V microalloying,finite element simulation of heating system,narrow range control of rolling temperature and rolling speed,etc.The results show that the mechanical properties of Q355D hot-rolled H-beam can meet the requirements of national standard by adopting the basic principles of adding Nb and V alloy elements,heating at low temperature for a long time,appropriately shortening the furnace time,reducing the starting temperature or soaking temperature of finish rolling,and increasing the rolling speed(increasing the rolling temperature of finish rolling).

关 键 词：Q355D热轧H型钢 中小型半连轧 加热制度 轧制制度 低温冲击韧性 

分 类 号：TG3[金属学及工艺—金属压力加工]