Abstract
Composite strips combine the advantages of each component, and the thickness of each layer directly determines whether it can meet the special requirements of different environments and service conditions. Prediction of rolling force and layer thickness is very important for process control and product performance. There are many complex strong coupling variables in bimetal clad rolling (CR), and it is difficult to build a concise mathematical model suitable for production. The idea of equivalent clad rolling (ECR) is creatively proposed and the corresponding relationship between CR and ECR is established. By analyzing the deformation zone of each metal in the CR process, the equivalent roll radius and equivalent deformation length of each layer are established, the calculation methods of improved Stone and Bland-Ford-Hill rolling force applicable to the bimetal CR process are presented, the calculation connection bridge of equal rolling force is proposed, the coupling iteration relationships of flattening radius and rolling force are established through adjusting the reduction rate of each layer, and then the prediction model of layer thickness and rolling force in bimetal CR is developed. The ECR analytical model is verified by finite element simulation and related CR experiments. Using the proposed model, the relationships between the layer thicknesses before and after CR are established, and the effects of different process parameters such as reduction rate, inlet clad ratio, total inlet thickness, friction factor ratio on outlet clad ratio and the rolling force are expounded. Based on the mature single-strip rolling calculation model, the proposed ECR prediction model is short in calculation time and convenient in application.
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Funding
This study is financially supported by the National Natural Science Foundation of China (Nos.: 51904206, 51905372, 52105390, 52205404), National Key R&D Program of China (Nos.: 2018YFB1308700, 2021YFB3401000), Fundamental Research Program of Shanxi Province (No.: 202203021212293), Shanxi Province Science and Technology Major Projects (Grant No. 20181102015, 20181101008), and Central Government Guides the Special Fund Projects of Local Scientific and Technological Development (YDZX20191400002149).
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Pingju Hao: writing—original draft, formula derivation. Yuanming Liu: formal analysis, writing—review and editing. Yanxiao Liu: data measurement, writing—review. Zhenhua Wang: visualization, validation. Tao Wang: conceptualization, methodology, writing—review and editing. Qingxue Huang: conceptualization, methodology, project administration. Zhenguo Wang: methodology, validation.
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Hao, P., Liu, Y., Liu, Y. et al. Analysis of rolling force and layer thickness in bimetal clad rolling. Int J Adv Manuf Technol 127, 4401–4411 (2023). https://doi.org/10.1007/s00170-023-11818-y
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DOI: https://doi.org/10.1007/s00170-023-11818-y