Effect of process parameters on density of magnesium alloy parts by low-pressure expendable pattern casting

摘要：

The combination of magnesium alloys with the low-pressure expendable pattern casting (LP-EPC) process would bright future for application of magnesium alloys.The researches are focused on the effect of process parameters on the internal casting quality of magnesium alloy parts.AZ91D magnesium alloy castings were produced for different combinations of the LP-EPC process parameters.Specifically,pouring temperature,vacuum,filling velocity and coupling action of these factors were manipulated to observe their effect on the casting porosity and density distribution.The results indicate that the pouring temperature with LP-EPC process is lower than it in gravity casting.The selected process parameters,such as vacuum,filling velocity and coupled modes of them,must ensure melt metal flowing front profile exhibiting smooth and convex shape.The optimal process parameters for the castings are pouring temperature 9831 023 K,vacuum 0.020.03 MPa,filling velocity 6095 mm/s,and simultaneous filling with sucking.

关键词： magnesium alloy low-pressure expendable pattern casting process parameters density

作者: LI Ji-qiang FAN Zi-tian DONG Xuan-pu

作者单位: State Key Laboratory of Material Processing and Die and Mould Technology Huazhong University of Science and Technology,Wuhan 430074,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）