镁合金薄壁件压铸成形的工艺及数值模拟
发布时间：2019-05-09 09:24
【摘要】：利用Procast模拟软件分析AZ91D镁合金薄壁手机支架件的充型过程与凝固过程;结合模拟与实验研究不同工艺参数对薄壁压铸件表面质量、密度、组织及力学性能的影响,并探索出合适的工艺参数。结果表明:薄壁支架件所产生的缺陷类型及位置与模拟结果相吻合;浇注温度和快压射速度对薄壁件的压铸成形具有重要影响,适当降低浇注温度或提高快压射速度均有利于改善铸件的表面质量,减少铸造缺陷、细化晶粒和提高力学性能。对于AZ91D镁合金薄壁手机支架件压铸,合适的浇注温度和快压射速度分别为670℃和2.3 m/s,在此工艺参数下生产的铸件表面质量良好,晶粒细小,其平均尺寸仅为5.1μm,铸件密度高,气孔率仅为2.0%,铸件力学性能优异,其抗拉强度、屈服强度、伸长率和硬度分别为306 MPa、203 MPa、6.0%和86 HV。
[Abstract]:The filling process and solidification process of AZ91D magnesium alloy thin-walled mobile phone support were analyzed by Procast simulation software. The effects of different technological parameters on the surface quality, density, microstructure and mechanical properties of thin-walled die castings were studied by means of simulation and experiment, and the suitable technological parameters were explored. The results show that the defect types and positions of the thin-walled scaffolds are in good agreement with the simulation results. Casting temperature and fast injection velocity have important effects on die casting of thin-walled parts. Properly lowering pouring temperature or increasing rapid injection speed is beneficial to improve surface quality, reduce casting defects, refine grain size and improve mechanical properties of thin-walled parts. For the die casting of AZ91D magnesium alloy thin-walled mobile phone support, the suitable pouring temperature and rapid injection rate are 670 鈩，
本文编号：2472658
[Abstract]:The filling process and solidification process of AZ91D magnesium alloy thin-walled mobile phone support were analyzed by Procast simulation software. The effects of different technological parameters on the surface quality, density, microstructure and mechanical properties of thin-walled die castings were studied by means of simulation and experiment, and the suitable technological parameters were explored. The results show that the defect types and positions of the thin-walled scaffolds are in good agreement with the simulation results. Casting temperature and fast injection velocity have important effects on die casting of thin-walled parts. Properly lowering pouring temperature or increasing rapid injection speed is beneficial to improve surface quality, reduce casting defects, refine grain size and improve mechanical properties of thin-walled parts. For the die casting of AZ91D magnesium alloy thin-walled mobile phone support, the suitable pouring temperature and rapid injection rate are 670 鈩，
本文编号：2472658
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2472658.html
