基于分数步长法的镁合金挤压铸造充型过程数值模拟  

Numerical Simulation of Mg-alloy Filling Process in Squeeze Casting Based On Fraction Step Method

作　　者：牛晓峰[1] 梁伟[1] 侯华[2] 赵宇宏[2] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]中北大学材料科学与工程学院,山西太原030051

出　　处：《铸造技术》2013年第5期576-579,共4页Foundry Technology

基　　金：国家自然基金资助项目(50975263);科技部国际合作项目(2011DFA50520)

摘　　要：采用分数步长法进行速度场和压力场的计算,根据挤压铸造的特点,考虑冲头的运动,建立基于有限差分法的流动场数值模拟程序,从而实现了对镁合金挤压铸造充型过程的数值模拟。为验证程序的正确性,对ZMgAl5MnZn镁合金实验件挤压铸造充型过程进行了模拟计算,模拟结果与中国兵器科学研究院宁波分院齐丕骧研究员关于冲头速度控制的论述一致。The fraction step method is applied in numerical simulation of the velocity fields and the pressure fields. The numerical simulation program of flow field was established based on finite difference method considering punch movement, so as to achieve the numerical simulation on extrusion casting process of magnesium alloy. It is proved that this program is consistent with the research result which was proposed by professor QI Pixiang.

关 键 词：镁合金 挤压铸造 分数步长法 充型过程 数值模拟 

分 类 号：TG249.2[金属学及工艺—铸造]