There is an unavoidable problem in the billet direct rolling process, that is the temperature difference between head and tail of billet. When the temperature difference between head and tail is too large, it will adversely affect the homogeneity of structure and properties in the length direction of the product. In view of the billet temperature characteristics of "head low and tail high" during the direct rolling process, a variable flow cooling strategy of "head weak and tail strong" before finish rolling or a variable power induction heating strategy of "head strong and tail weak" before rough rolling was put forward. The two processes described above were simulated by finite element method, and the key process parameters were optimized according to the calculation results, which provided a reference for practical application. The simulation results showed that for variable flow cooling mode, in order to eliminate the temperature difference between head and tail of linear distribution in the length direction, the required flow density was basically parabolic with the workpiece length; for variable power induction heating mode, the required heating power was basically linearly related to billet length.
陈庆安,张建宇,王艳辉,李河宗,陈亚宇. 方坯直轧工艺中头尾温差消除过程数值模拟[J]. 中国冶金, 2019, 29(9): 23-28.
CHEN Qingan,ZHANG Jianyu,WANG Yanhui,LI Hezong,CHEN Yayu. Numerical simulation on process of eliminating temperature #br#
difference between head and tail in billet direct rolling process[J]. China Metallurgy, 2019, 29(9): 23-28.