竖井顶模铸造纯铝凝固过程温度场和应力场的数值模拟  

Numerical Simulation of Temperature and Stress Fields in Solidification Processing by Casting Pure Aluminum Based on Shaft Top Model

作　　者：贾瑞娇[1] 严继康[1,2,3] 邱哲生[4] 杨钢[2] 施哲[3] 甘国友[1] 周永全[4] 易健宏[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明冶金研究院,云南昆明650031 [3]昆明理工大学冶金与能源工程学院,云南昆明650093 [4]云南铝业股份有限公司,云南昆明650502

出　　处：《昆明理工大学学报（自然科学版）》2013年第2期12-19,共8页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金(51274107;51262017);云南省重大科技专项(2012ZE008);云南省自然科学基金(2008ZC014M);昆明理工大学科研基金(2010-08)

摘　　要：针对竖井顶模半连续铸造纯铝在凝固过程中的温度场和应力场进行数值模拟.建立了纯铝半连续铸造凝固过程中传热及热应力数学模型和有限元模型.充分考虑了材料及边界条件的非线性特征,对边界条件进行了简化和设置.利用Procast软件对纯铝半连续铸造凝固过程的温度场进行了模拟,并通过现场测温试验,验证了温度场的正确性和有效性.同时,应用Procast应力分析模块模拟和分析了凝固过程的应力场和缩孔缩孔分析,并对裂纹进行了预测,通过与现场产品的裂纹对比,进一步证明了应力场和缩孔缩松的模拟和预测的有效性,从而能够为减少缺陷提高质量提供理论上的指导.The temperature and stress fields in solidification processing by semi -continuous casting pure alumi- num are simulated in this paper. The mathematical and FEM models of heat transferring and thermal stress analy- sis are built in solidification processing by semi - continuous casting pure aluminum based on shaft top model. The nonlinear feature of material and the simplified boundaries condition are set. The temperature fields in solidi- fication during semi - continuous casting pure aluminum are simulated by using Procast software. The correctness and validity of FEM calculation are verified by the actual temperature data. In the meantime, the stress fields of solidification process are simulated by using Procast stress analysis module. The calculated stress fields and shrinkage pores results further verify the validity of simulation and prediction. The simulation results would be extremely beneiicial to predict crack and to provide theoretical foundation ior the actual production.

关 键 词：纯铝 半连续铸造 有限元 温度场 应力场 

分 类 号：TG146.2[一般工业技术—材料科学与工程]