双辊薄带振动铸轧工艺最优时域特性  

Optimum time domain characteristics of twin-roll strip vibration cast-rolling process

作　　者：孙明翰 郑传幸 郑立康 郭仕鹏 杜凤山 SUN Ming-han;ZHENG Chuan-xing;ZHENG Li-kang;GUO Shi-peng;DU Feng-shan(National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,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

出　　处：《中国有色金属学报》2020年第10期2267-2279,共13页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(U1604251);河北省自然科学基金资助项目(E201303342)。

摘　　要：对双辊薄带振动铸轧新工艺中振动参数的影响开展研究。在振动与非振动状态下进行7075铝合金板带铸轧的对比实验。构建双辊薄带振动铸轧数值仿真模型,并通过出坯温度验证模型的准确性,然后开展对振动铸轧熔池区流场及温度场时域特性的研究。结果表明:振动对熔池区温度场分布存在影响,振动状态下Kiss点位置随时间呈正弦形式波动。同时,通过对流场时域特性的分析,发现振动存在对熔池区施加扰动效果的作用。振动存在细化铸轧板坯微观组织并抑制偏析的作用效果。基于振频、振幅对熔池区流场及温度场影响的不同规律,确立了振动铸轧工艺最优的振动参数为振幅0.56 mm、振频20 Hz。The influence of vibration parameters in the new process of vibration cast-rolling was studied.A comparative experiment of 7075 aluminum alloy cast-rolling under vibration and non-vibration conditions was carried out.A numerical simulation model of vibration cast-rolling was constructed,and the accuracy of the model was verified by experiments.Then the time-domain characteristics of the molten pool flow field and temperature field under vibration condition were studied.The results show that the vibration can not only make the Kiss point position fluctuate sinusoidal with time,but also exert disturbance effect on the molten pool.It is found that the new process can refine the grain and suppress the segregation.Based on the effect of vibration frequency and amplitude on the molten pool,the optimal vibration parameters of this process are amplitude of 0.56 mm and frequency of 20 Hz.

关 键 词：振动铸轧 数值仿真 时域特性 振动参数 

分 类 号：TF19[冶金工程—冶金物理化学]