机构地区: 东北大学材料与冶金学院轧制技术及连轧自动化国家重点实验室
出 处: 《东北大学学报(自然科学版)》 2004年第4期360-362,共3页
摘 要: 从导热微分方程数值差分解法入手,对轧件在粗轧和精轧之间进行超快冷却后的温度场进行了数值模拟·结果表明:当板坯初始温度为1200℃,经过6道次粗轧后,以3m/s的速度进入超快冷却区,当水冷换热系数为10kW/(m2·℃)时可以得到70℃/s的冷却速度;另外由于超冷后表面温度的强烈回复,故在进行精轧时,必须进行温度修正,保证轧件在精轧区开轧温度的精度· Temperature field under ultra fast cooling (UFC) is simulated by finite-difference method. The results show that when a slab which was rolled from 180?mm to 40?mm by 6 passes at an initial temperature 1?200?℃ enters into a UFC zone standing between the roughing mill and finishing mill at 3?m/s, a water cooling rate 70?℃/s can be obtained if the heat-exchange coefficient is up to 10?kW/(m^2·℃). At the same time, the entrance finishing temperature must be corrected because of the strong temperature recovery after UFC.
关 键 词: 超快冷却 温度场 精轧开始温度 水冷换热系数 热轧带钢
领 域: [金属学及工艺]