WCA January 2020

(2) The hot rolling model of copper rod was built, and the deformation law of copper rod in ten pass hot strip mill was discussed. By simulating the grouping rolling of hot strip mill, it is found that the surface deformation difference of copper rod in elliptical pass system is easy to cause damage. The surface temperature of copper rod decreases while the core temperature rises during rolling, and the temperature of copper rod tends to be the same after rolling under the action of heat conduction. At the same time, the rolling damage mainly concentrates on the surface of copper rod, which lays a theoretical foundation for improving the rolling production of high quality copper rod. (3) Through the modelling and simulation of the continuous casting and rolling process of the SCR3000 production line, the production process and equipment of copper rod continuous casting and rolling were optimised. Aiming at the phenomenon of sticking roll in hot continuous rolling and the high content of copper powder in finished copper rod, a method of matching motor speed with elongation coefficient is put forward to optimise rolling speed and change the speed of 1# and 2# to effectively reduce copper powder content in copper rod. At the same time, optimising the spray cooling system to control the rolling temperature of copper rod can effectively solve the problem of copper sticking on rolls. [1] Binmin Y & Weiqi Z. Improvement of Qualification Rate of Copper Rod in SCR Production Line [J]. Special Casting & Nonferrous Alloys, 2011, 4. [2] Yang Yunchuan. Study on Microstructure and Properties of SCR Continuous Casting and Rolling Copper Alloy [D]. Kunming University of Technology, 2011. [3] Sahoo S, Kumar A, Dhindaw B K, et al. Modelling and Experimental Validation of Rapid Cooling and Solidification During High-Speed Twin-Roll Strip Casting of Al-33 Wt Pct Cu[J]. Metallurgical and Materials Transactions B, 2012, 43(4): 915-924. [4] Komanduri R, Chandrasekaran N, Raff L M. Molecular Dynamics (MD) Simulation of Uniaxial Tension of Some Single-crystal Cubic Metals at Nanolevel [J], International Journal of Mechanical Sciences, 2011, 43: 2237-2260. [5] Liu Heping, Chou Shengtao, Gan Yong. Numerical Simulation on Turbulent Transport and Solidification in Mushy Zone during Continuous Casting[J]. Journal of Iron and Steel Research, 2003(02):68-73. [6] Rule W K, Jones S E. A revised form for the Johnson–Cook strength model[J]. International Journal of Impact Engineering, 1998, 21(8): 609-624. [7] Liu Jinsong. Application of MSC.MARC in Material Processing Engineering [M]. Beijing ： China Water & Power Press, 2011. [8] Liu Qingsong. Influence of continuous rolling process on quality of electrician copper rod[D]. Anhui University of Technology, 2016. 6 References

National Engineering Research Centre for Equipment and Technology of Cold Strip Rolling Yanshan University Qinhuangdao 066004 China Tel : +86 0335 8387651

Email : pengyan@ysu.edu.cn Jiangsu Hengtong Precision Metal Material Co Ltd Suzhou 215232 China Tel : +86 0512 63803026 Email : jihuis@htgd.com.cn

95

www.read-wca.com

Wire & Cable ASIA – January/February 2020