低合金高强钢连退平整伸长率不足问题研究被引量：2

Study on insufficient elongation of low alloy high strength steel during continuous annealing and tempering

导出

摘要平整过程中稳定的板带伸长率控制是确保成品质量的前提。针对某厂生产低合金高强带钢偶发带钢伸长率达不到目标伸长率,且通过增大轧制力和张力至设备极限亦无法解决的问题,建立了轧件-辊系一体化有限元仿真模型。仿真分析结果发现,随着带钢强度升高、厚度变厚、张力减小、弯辊力增大、界面摩擦因数增大都会使低合金高强带钢伸长率减小。基于有限元仿真计算结果并结合实际生产,确定了平整机轧制能力不足以及平整机辊系凸度设置不合理是是导致低合金高强带钢伸长率不足的主要原因。为此,设计了支撑辊辊形、优化了轧辊服役制度以及轧制规程,使低合金高强带钢伸长率不足钢卷比例由2.11%降至0.62%。 Stable elongation control of the strip in the tempering process is the prerequisite to ensure the quality of the finished product.During the production of low alloy high strength steel strip,the elongation of strip can not be reached the target elongation occasionally,and it cannot be solved by increasing rolling force and tension even to the limit capability of temper mill.To solve this problem,the finite element simulation model of rolled part and roll integration system was established.The simulation analysis results show that with the strength and thickness increasing of the strip,tension decreasing,bending roll force increasing and friction coefficient of interface increasing,the elongation of low alloy high strength steel decreased.Based on the results of finite element simulation and actual production situation,the main reasons of insufficient elongation of low alloy high strength steel strip are insufficient rolling capacity of the temper mill and unreasonable convexity setting of the roll system.Aiming at the above problems,the shape of back-up roll was designed,the roll lifecycle system and rolling regulations were comprehensively optimized,which effectively reduces the proportion of low alloy high strength steel coils with insufficient elongation from 2.11%to 0.62%.

作者孙建华齐春雨闫磊商光鹏柳智博宋元坤 SUN Jianhua;QI Chunyu;YAN Lei;SHANG Guangpeng;LIU Zhibo;SONG Yuankun(Beijing Shougang Cold Rolled Sheet Co.,Ltd.,Beijing 101300,China;School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区北京首钢冷轧薄板有限公司北京科技大学机械工程学院

出处《轧钢》 2023年第5期55-62,67,共9页 Steel Rolling

基金国家自然科学基金面上项目(51075031)。

关键词低合金高强钢平整伸长率有限元仿真模型支撑辊辊形轧辊服役制度轧制规程 low alloy high strength steel tempering elongation finite element simulation model the shape of back-up roll roll lifecycle system rolling schedule

分类号 TG335 [金属学及工艺—金属压力加工]