Compostion of die casting aluminum in Ningbo Zhiye Mechanical Components Co.,Ltd.

Die casting aluminum features low density,good heat conductive property,corrosion resistance,while it has disadvantages,such as sticking to the cavity.Therefore,it is important to understand the properties of die casting aluminum.There are two methods that can improve die casting aluminum property.One is to improve die casting processing,the other is to improve composition of die casting aluminum.Most of die casting process are fully developed and hard to improve.Therefore,to adjust composition of die casting aluminum is useful way to improve die casting aluminum property.By composition,the die casting aluminum categories are divided into Al-Si,Al-Mg,Al-Si-Mg and Al-Si-Cu.By add Cu,Fe,Sr,Zr,Mn,Ti,the die casting aluminum property can be improve dramatically.


The pure aluminum can only be used into cables,heat exchange system and capacitors since there is no high requirement for low load,low corrosion resistance and electric conduct in these field.By compare to pure aluminum,aluminum alloy can be widely used in many field.By adding certain elements into aluminum alloy,the castability and mechanical property can be improve very much.


Si is main element in die casting aluminum.The strength of die casting aluminum enhanced when composition of Si is lower,while strength decreased when composition of Si goes higher.Few amount of Si can improve fluidity of alloy.The fluidity affected badly when there is over amount of Si in alloy.Therefore,the fluidity of alloy can be improved by adding about 12.5% Si into Al-Mg alloy.


Mg can improve tensile strength,hardness and corrosion resistance of die casting aluminum.By research,the corrosion resistance and mechanical property can be improved by adding small amount of Mg into alloy.While the alloy is easy to crack if add too much Mg into alloy.The following chart show the performance of alloy with different amount of Mg.