稀土镁合金压铸工艺数值模拟及正交试验研究  

Numerical Simulation and Orthogonal Experimental Study on Die Casting Process of Rare Earth Magnesium Alloy

作　　者：彭湃 吴广新[1,2] 马征 王波[1,2] 张捷宇[1,2] PENG Pai;WU Guang-xin;MA Zheng;WANG Bo;ZHANG Jie-yu(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;State Key Laboratory of Advanced Special Steel,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]上海大学省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444

出　　处：《铸造》2022年第12期1548-1554,共7页Foundry

基　　金：上大新材料(泰州)研究院和包头稀土院资助课题。

摘　　要：采用数值模拟的方法,研究了镁合金压铸件充型凝固过程。基于正交试验设计,分析了浇注温度、模具温度、压射速度和保压时间等工艺参数对缩松、缩孔、热裂倾向指数的影响。结合模拟结果,获得了最佳的压铸工艺参数:浇注温度为690℃,压射速度为8 m/s,模具温度为240℃,保压时间为7 s。优化后的工艺参数减少了铸件的缩松、缩孔和热裂倾向指数,用该工艺参数进行压铸生产,获得了质量良好的镁合金压铸件,并对缺陷位置及微观组织进行了验证。In this paper, the filling and solidification process of magnesium alloy die casting was numerically simulated.Based on orthogonal experimental design, the effects of pouring temperature, mold temperature, injection speed and holding time on shrinkage porosity, hot tearing tendency were studied. Combined with the simulation results, the best die casting process parameters was obtained: 690 ℃ pouring temperature, 8m/s injection speed, 240 ℃ mold temperature and 7 s holding time. The optimized die casting process parameters reduced the shrinkage porosity and hot tearing tendency on the die casting. Good quality magnesium alloy die casting was obtained by using process parameters, and the defect location and microstructure were verified.

关 键 词：正交试验 镁合金 压铸 数值模拟 

分 类 号：TG249.2[金属学及工艺—铸造] TP311[自动化与计算机技术—计算机软件与理论]