摘要
针对不锈钢/碳钢复合板在平整轧制过程中极易出现不均匀延伸并导致板形翘曲的行为,建立了不锈钢/碳钢复合板平整轧制过程的有限元数值模拟模型,对已实现工业化批量生产的不锈钢/碳钢复合板平整轧制过程的不均匀变形行为及其可能导致的板形翘曲缺陷进行数值模拟研究。在此基础上,对比分析了均质板、非对称不锈钢/碳钢复合板以及对称不锈钢/碳钢/不锈钢复合板平整轧制过程板形的遗传与演变规律,发现仅非对称不锈钢/碳钢复合板在平整轧制过程中极易产生板形翘曲缺陷,同时对比分析了平整和常规轧制对非对称不锈钢/碳钢复合板轧后翘曲缺陷的影响。揭示了不锈钢/碳钢复合板厚向分层特征以及复合板尺寸参数、平整工艺和平整机设备参数等对其板形翘曲缺陷的影响规律,研究表明,对复合板尺寸参数而言,平整过后翘曲高度与厚度比呈正比。对于平整工艺而言,当等张力平整轧制时,平整过后翘曲高度与张力呈正比;当不等张力平整轧制时,前张力的变化对平整过后翘曲缺陷的影响较大;同时平整过后翘曲高度与轧辊和碳钢层表面摩擦因数呈反比。对平整设备参数而言,平整过后翘曲高度与碳钢层表面接触的轧辊辊径、入口侧防皱辊抬起高度以及不锈钢层表面接触轧辊偏向入口侧的距离均呈正比关系。最后,采用轧制试验对数值模拟结果进行了验证,证明了复合板平整轧制模型的准确性。基于上述研究结果,提出了相应的工艺对策,为金属复合板平整轧制过程的板形翘曲控制提供了理论依据。
Aiming at the behavior that stainless steel/carbon steel clad plate is prone to non-uniform extension and warpage during temper rolling,a finite element numerical simulation model for the temper rolling process of stainless steel/carbon steel clad plate was established,and the uneven deformation behavior of the temper rolling process of the stainless steel/carbon steel clad plate that has been industrialized and mass-produced and its possible lead to warpage Numerical simulation study of defects.On this basis,the heredity and evolution of the shape of homogeneous plate,asymmetric stainless steel/carbon steel clad plate and symmetrical stainless steel/carbon steel/stainless steel clad plate during temper rolling were compared and analyzed,and it was found that only asymmetric stainless steel/carbon steel clad plate is very prone to warpage defects in the process of temper rolling.At the same time,the effects of tempering and conventional rolling on the warpage defects of asymmetric stainless steel/carbon steel clad plates after rolling are compared and analyzed.The thickness-wise delamination characteristics of stainless steel/carbon steel clad plates and the influence of clad plate size parameters,leveling process and equipment parameters of leveling machine,etc.on the warpage defects of the plate shape are revealed.Afterwards,the warp height is proportional to the thickness ratio.For the skin-passing process,when temper rolling with equal tension,the warpage height after skin-passing is proportional to the tension;when temper rolling with unequal tension,the change of pre-tension has a great influence on the warpage defects after skin-passing;the warpage height after that is inversely proportional to the friction coefficient of the roll and the carbon steel layer surface.For the parameters of the leveling equipment,the warpage height after leveling is proportional to the diameter of the roll contacting the surface of the carbon steel layer,the lifting height of the anti-wrinkle roll on the entry side,and the distance from the contact roll on the surface of the stainless steel layer to the entry side.Finally,the numerical simulation results were verified by rolling experiments,which proved the accuracy of the temper rolling model of the clad plate.Based on the above research results,corresponding technological countermeasures are proposed,which provide a theoretical basis for the control of flat warpage during temper rolling of metal clad plates.
作者
于孟
王春海
张晓峰
文杰
王永强
张清东
YU Meng;WANG Chun-hai;ZHANG Xiao-feng;WEN Jie;WANG Yong-qiang;ZHANG Qing-dong(Jingtang Technology Center,Research Institute of Technology,Shougang Group Corporation,Beiing 100043,China;Cold-rolling Department,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063210,Hebei,China;School of Mechanical Engineering,University of Science and Technology Beiing,Beiing 100083,China)
出处
《钢铁》
CAS
CSCD
北大核心
2022年第7期106-114,共9页
Iron and Steel
基金
国家自然科学基金资助项目(51575040)。
关键词
金属复合板
平整轧制
延伸
板形翘曲
工艺参数
metal laminate
temper rolling
extension
plate warping
process parameters
