铸造技术2013，Vol.34Issue(1)：57-60,4.
一种新的基于FDM/FEM挤压铸造收缩缺陷计算模型
New Kind of Shrinkage Defect Calculation Model for Squeeze Casting Based on FDM/FEM
摘要
Abstract
According to the solidification characteristics in squeeze casting process and the partial differential equations of high thermal conductivity, the calculation model (FDM format) wass used for temperature field numerical simulation; dynamic isolated multi-molten pool judgment method wass used to determine the position of the pool; and FEM wass used to calculate the pressure of pool center. If the pressure of molten pool center downs to 0, liquid metal, closed in the scale, will solidify in the condition of no pressure and with feeding shrinkage in accordance with gravity feeding method. The equivalent liquid surface descending method of isolated molten pool was used to predict the formation of shrinkage defect, the simulation results were very closed to the experimental result.关键词
挤压铸造/铸造缺陷/数值模拟/FDM/FEMKey words
squeeze casting/ casting shrinkage defect/ simulation/ FDM/FEM分类
矿业与冶金引用本文复制引用
葛鸿浩,侯华,赵宇宏,牛晓峰..一种新的基于FDM/FEM挤压铸造收缩缺陷计算模型[J].铸造技术,2013,34(1):57-60,4.基金项目
国家自然科学基金(51204147,51274175,50975263) （51204147,51274175,50975263）
科技部国际科技合作项目(2011DFA50520) （2011DFA50520）
山西省回国留学人员科研资助(2011-重点6) （2011-重点6）
