铝合金铸件凝固过程二次枝晶臂间距模拟计算  

Simulation Calculation of Secondary Dendritic Arm Spacing During Solidification of Aluminum Alloy Casting

作　　者：车家宝 廖敦明[1] 孙飞[1] 陈涛 CHE Jia-bao;LIAO Dun-ming;SUN Fei;CHEN Tao(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Wuhan Chenxi Yunfeng Technology Co.,Ltd.,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]武汉晨曦芸峰科技有限公司,湖北武汉430074

出　　处：《铸造》2020年第4期382-387,共6页Foundry

基　　金：教育部新世纪人才支持计划(NCET-13-0229)。

摘　　要：以铸造CAE温度场为基础,根据Furer-Wunderlin二次枝晶臂间距计算方法,建立了预测铝合金铸件凝固过程二次枝晶臂间距的计算模型。计算了ZL101A阶梯形铸件在凝固过程中不同部位的局部凝固时间和各个时刻的二次枝晶臂间距大小,对铝合金试验铸件进行金相组织观察,测量计算得到了铸件的实际二次枝晶臂间距大小,将计算结果与试验结果进行对比,验证了计算模型的准确性。Based on the temperature field of casting numerical simulation and Furer-Wunderlin secondary dendrite arm spacing calculation method, a model for predicting the secondary dendrite arm spacing during solidification of aluminum alloy casting was established. The local solidification time of different parts and the secondary dendrite arm spacing at each moment in the solidification process of ZL101A stepped casting were calculated, and the actual secondary dendrite arm spacing of the casting was measured and calculated by observing the microstructure of experimental aluminum alloy casting. The accuracy of the calculation model is verified by comparing the calculation results with the test results.

关 键 词：铝合金 二次枝晶臂间距 模拟 凝固 

分 类 号：TG146.21[一般工业技术—材料科学与工程]