Die casting parts’ normal defect is gas porosity. While if we learn about its reason ,we can deal it well.
Cause of pore of the aluminum die casting parts mainly is poor refining degassing. casting temperature of liquid aluminum is about 680 degrees, at this temperature, the liquid hydrogen content is about 20 times of the solid hydrogen content, thus there will be a large number of gas generated and need to be released, as a result irregular pores yielded. So liquid aluminum refining degassing plays important role during die casting process.
The second possible reason is poor exhaust channel. We can improve die casting mould exhaust gas channel and remove residual aluminum skin on the channel in time