Causes and Preventative Methods of Blow Hole and Slag Inside ZL101A Castings by Investment Casting
According to the foundry production practice,the mechanism of oxidation of aluminum melt at high temperature and the formation of blow hole and slag inclusion inside the ZL101A castings were researched.The microstructure of blow hole and slag within the casting was analyzed using the optical microscope.The causes of the defect formation and its prevention method was summarized.The results show that it can effectively prevent blow hole defect as the argon is introduced into liquid aluminum;and the ceramic filter can effectively keep slag from forming within the castings.