半连续铸造高合金化铝合金过程的数值模拟  

Numerical Simulation of Direct-Chill Casting Process of Semi-Continuous Casting Aluminum Alloy with High Alloying Components

作　　者：汤林志[1] 李志辉[2] 范云强[1,2] 刘君城[2] 李锡武[2] 张永安[2] 熊柏青[2] 

机构地区：[1]中国铝业公司 [2]北京有色金属研究总院有色金属材料制备加工国家重点实验室

出　　处：《特种铸造及有色合金》2013年第8期707-710,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划项目(2012CB619504);国家自然科学基金资助项目(51274046);科技支撑计划资助项目(2007BAE38B0)

摘　　要：基于ANSYS有限元模拟软件建立了铝合金半连续铸造过程的数值模型。研究了起始铸造速度持续时间、铸造温度、铸造速度、刮水板等工艺参数对铸锭温度场和应力场的影响。研究表明,延长起始阶段低铸速的持续时间,会使液穴更晚达到稳定状态;铸造温度和铸造速度对液穴深度的影响具有线性关系;设置刮水板能使铸锭表面温度回升,从而减小铸坯心部和表面温差,有效地降低了铸坯中心的热应力。A numerical model based on ANSYS software package was developed to simulate the DC east- ing process of aluminum alloy. Effects of semi-continuous parameters, such as duration time of initial velocity, pouring temperature, drawing velocity, wipe panel, on temperature fields and stress fields of ingot were investigated. The results show that with increasing in the duration time of initial casting speed, the meniscus shape tended to be stable is postponed. There exists obvious linearity relationship between sump depth and casting temperature or casting speed. Because of wipe panel increasing the in- got surface temperature to reduce the temperature difference of ingot heart and surface, the thermal stress in center of ingot is decreased greatly.

关 键 词：铝合金 半连续铸造 数值模拟 工艺参数 液穴 热应力 

分 类 号：TG27[金属学及工艺—铸造]