铜包钢棒多辊固-液铸轧复合工艺布流区界面传热行为  

Interfacial heat transfer behavior in delivery zone of multi-roll solid-liquid cast-rolling bonding process for copper cladding steel bars

作　　者：季策 黄华贵 杨家辉[1,2] JI Ce;HUANG Hua-gui;YANG Jia-hui(National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao 066004,China;College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,秦皇岛066004 [2]燕山大学机械工程学院,秦皇岛066004

出　　处：《中国有色金属学报》2022年第9期2568-2579,共12页The Chinese Journal of Nonferrous Metals

基　　金：国家重点研发计划资助项目(2018YFA0707300);国家自然科学基金资助项目(51974278)。

摘　　要：金属包覆材料多辊固-液铸轧复合工艺集固-液铸轧复合技术与多辊孔型轧制技术的优势为一体,可以实现高效率、短流程连续成形。为了通过数值模拟技术缩短工艺开发周期,针对布流区内钢/铜固-液界面传热问题,基于一维非稳态传热原理反求界面换热系数,拟合了其与钢侧表面温度相关的计算模型,推导了差分计算模型并利用Visual Basic软件编制了计算程序,分析了工艺参数对基体温度分布的影响规律。结果表明:基体经过布流区后,表面温度高,芯部温度低,有利于同时获得较高表面温度和足够基体强度;在工艺参数常规调整范围内,覆层温度对基体温度影响较小,名义铸轧速度、覆层高度、基体半径对基体温度影响较为显著。就工艺控制角度而言,只有覆层高度可根据需要在较大范围内进行调整,从而调控铸轧区入口处的基体温度。The multi-roll solid-liquid cast-rolling bonding(MRSLCRB)process of metal cladding materials integrates the advantages of solid-liquid cast-rolling bonding technology and multi-roll groove rolling technology,which can realize high efficiency,short flow and continuous forming.To shorten the process development cycle by numerical simulation,aiming at the steel/Cu solid-liquid interfacial heat transfer in the delivery zone,the interfacial heat transfer coefficient was computed inversely based on one-dimensional unsteady heat transfer principle,and the calculation model related to steel bar surface temperature was fitted.The differential calculation model was derived and the calculation program was compiled by the Visual Basic software.The influences of process parameters on substrate temperature were analyzed.The results show that,when the substrate pass through the delivery zone,the surface temperature is high and the core temperature is low.Hence,this case can ensure sufficient strength of the substrate metal while obtaining high surface temperature.In the conventional adjustment range of process parameters,the cladding temperature has little effect on the substrate temperature.The nominal cast-rolling velocity,the cladding height,and substrate radius have significant effects on the substrate temperature.From the view of process control,only the cladding height can be adjusted in a wide range according to the requirement,so as to control the substrate temperature at the cast-rolling zone entrance.

关 键 词：铜包钢 固-液界面 铸轧复合 传热 换热系数 

分 类 号：TG339[金属学及工艺—金属压力加工]