摘要
在冷轧过程中,轧辊表面镀层的应力分布是影响镀层服役性能和使用寿命的重要因素。本工作基于冷轧工况,利用有限元仿真软件ABAQUS建立了轧辊和板材的三维有限元模型,针对冶金轧辊用复合电镀涂层,结合弹塑性变形等相关理论,系统研究了镀层的厚度、弹性模量及摩擦系数对轧辊-镀层界面应力分布及大小的影响。研究结果表明:镀层厚度在20~80μm时,随着镀层厚度的增大,轧辊-镀层界面峰值应力逐渐减小,当镀层厚度大于60μm时界面峰值应力又略有增加,镀层磨损量显著降低,网格破损现象得到明显改善;镀层弹性模量在200~600 GPa时,随着镀层弹性模量的增大,轧辊-镀层界面峰值应力先增大后减小,600 GPa时的界面峰值应力最小;镀层摩擦系数对轧辊-镀层界面峰值应力的影响不大,是次要影响因素。综合考虑轧辊表面镀层的性能需求,依据界面峰值应力与镀层结合状态的关系可知,镀层厚度以40~60μm为宜,弹性模量以400~600 GPa为宜。
In the process of cold rolling,stress distribution of composite electroplating coating on the roll is an important factor that affects the service performance and life of the coating.In this work,the three-dimensional finite element model consisting of a cold roll and a steel plate was established by using the finite element simulation software ABAQUS based on the cold rolling condition.The effects of thickness,elastic modulus and friction coefficient of the coating on the distribution and magnitude of the peak stress at the roll-coating interface were systematically studied based on the theory of elastic-plastic deformation.The results show that with the increase of the coating thickness in the range of 20—80μm,the peak stress at the interface first decreases gradually and slightly increases when the thickness exceeds 60μm,with wear of the coating significantly decreasing and the grid damage obviously improved.With the increase of the elastic modulus of the coating in the range of 200—600 GPa,the peak stress of the roll-coating interface increases first and then decreases,which is the lowest at the elastic modulus of 600 GPa.The friction coefficient of the coating has little effect on the peak stress of the roll-coating interface,which is the secondary factor.Considering the performance requirements of the coating on the roll and according to the relationship between the peak stress of the interface and the bonding state of the coa-ting,it can be seen that the suitable thickness of the coating is 40—60μm and the optimum elastic modulus is 400—600 GPa.
作者
孙伟
张淑婷
杜开平
欧阳佩旋
杨谨赫
SUN Wei;ZHANG Shuting;DU Kaiping;OUYANG Peixuan;YANG Jinhe(School of Mechanical and Material Engineering,North University of Technology,Beijing 100144,China;Mining and Metallurgy Technology Group Co.,Ltd.,Beijing 100160,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第7期116-121,共6页
Materials Reports
基金
国家重点研发计划(2018YFB2002000)
北京市基金-市教委联合资助项目(KZ201910009010)
北方工业大学高层次人才科研启动项目(XN277,110051360002)
毓杰团队项目(XN212/009)。
关键词
冷轧辊
复合电镀涂层
有限元法
涂层性能
界面应力
cold rolling
composite electroplating coating
finite element method
coating property
interfacial stress
