镁合金隔板件差压铸造工艺研究  

Research on Differential Pressure Casting Process for Magnesium Alloy Partition Parts

作　　者：蒋新安 刘怡乐 路声宇 杨明军 林翰 Jiang Xin'an;Liu Yile;Lu Shengyu;Yang Mingjun;Lin Han(Guizhou Aerospace Fenghua Precision Equipment Co.,Ltd.,Guiyang Guizhou 550000,China)

机构地区：[1]贵州航天风华精密设备有限公司,贵州贵阳550000

出　　处：《山西冶金》2024年第5期18-21,共4页Shanxi Metallurgy

摘　　要：基于NoveaCast铸造模拟软件对镁合金隔板件进行差压铸造充型与凝固过程的预测与仿真,发现隔板件在凝固过程中遵循温度梯度法,薄壁区域温度梯度较小,金属液结晶凝固将要结束时,温度梯度逐渐减小到临界点,则相应位置处的补缩通道会被截断,从而引起缩松缺陷的产生,通过合理利用冷铁的激冷作用控制金属液的凝固顺序来进行优化。结果表明,顺序凝固可以有效减少薄壁隔板件出现缩孔与缩松等内部缺陷。This article is based on the NoveaCast casting simulation software to predict and simulate the filling and solidification process of magnesium alloy partition parts in differential pressure casting.It is found that the partition parts follow the temperature gradient method during the solidification process,and the temperature gradient in the thin-walled area is small.When the crystallization solidification of the metal liquid is about to end,the temperature gradient gradually decreases to the critical point,and the corresponding shrinkage channels at the corresponding positions will be cut off,resulting in the generation of shrinkage defects.The solidification sequence of molten metal is optimized by reasonably utilizing the chilling effect of cold iron to control its solidification sequence.The results indicate that sequential solidification can effectively reduce internal defects such as shrinkage and porosity in thin-walled partition components.

关 键 词：镁合金 隔板件 差压铸造 模拟仿真 

分 类 号：TG146.22[一般工业技术—材料科学与工程]