铸造铝合金冷却速度对凝固组织的影响实验分析

Experimental Analysis of the Effect of Cooling Rate on Solidification Structure of Cast Aluminum Alloy

在对铝合金材质进行铸造生产的过程中,冷却速度的不同对其凝固形成的内部组织构造具有不同的影响,从而影响铝合金材质的性能及使用。因此,在薄壁铝合金构件铸造凝固过程中,采用在不同位置设置冷铁的方法,改变金属液的冷却速度,并对凝固后的组织内部进行扫描电子显微镜分析,结果表明,较快的冷却速度,可以对内部的枝晶组织及共晶硅组织起到较好的细化作用,提高铝合金材料的性能。

In the process of aluminum alloy casting production, different cooling rates have different effects on the internal structure formed by solidification, thus affecting the performance and use of aluminum alloy materials. Thus, during the casting and solidification process of thin-walled aluminum alloy components, the method of setting chill at different positions is used to change the cooling rate of the molten metal, and the internal structure of the solidified structure is analyzed by scanning electron microscope. The results show that a faster cooling rate can play a better role in refining the internal dendritic structure and eutectic silicon structure, and improve the properties of aluminum alloy materials.