镁合金半固态坯料重熔过程数值模拟.pdfVIP

学兔兔 2009年第3期 铸 造 设 备 与 工 艺 2009年 6月 FOUNDRY EQUIPMENT AND TECHNOLOGY Jun．2009 No3 ·试验研究· 镁合金半固态坯料重熔过程数值模拟 朱 晶，刘赵铭 (大连交通大学材料科学与工程学院，辽宁大连 116028) 摘 要：选取了有限元软件ANSYS对镁合金半固态坯料重熔过程进行了数值模拟．并采用电磁感应加热方 法。该方法不仅可以提高加热速度，还能使温度均匀化。通过改变电流密度、加热时间、初始温度及频率等参数， 找出加热参数与坯料重熔参数之间的关系，以取得通过控制加热工艺参数来获取理想的镁合金半固态坯料组织 的理论依据，从而指导生产过程。将所模拟的几组数据比较，选择电流密度为15e6A／m2．对生产比较有利。考虑到 实际的条件．提出了较低电流密度与多极加热结合的想法指导生产。 关键词：镁合金 ；半固态；数值模拟；重熔 中图分类号：TG146．2+2：TB115 文献标识码：A 文章编号：1674—6694(2009)03—0036—04 Numerical Simulation on Reheating Process of Magnesium Alloys Semi-solid Billets ZHU Jing,LIU Zhao-ming (sc幻oZ ofMaterial Science and Engineering,Dalian Jiaotong University,Dalian Liaoning 1 16028，China) Abstract：This paper simulate the reheating process of the semi—solid billets for Ma~esium alloys using ANSYS， the finite element software．The electromagnetism induction heating is used to enhance heating speed and make the temperature uniform．In order to find the regularity between heating parameter and reheating parameter of billet，parameters of electric current density，heating time， initial temperature and heating frequency are changed．The heating technological parameter can be controlled to obtain ideal theoretical basis for reheating of semi-solid billet，which could be used to direct the production．The electric current density is defined as 15e6 Mm ，which is good for produce．Considering the practical condition，the idea of the lower electric current density combining multiple—electrode heating is raised to direct the produce． Key words：Magnesium alloys，semi-solid，nume