4LIU Z,HU J,DING W,et al.Efect of processing parameters on mold filling in magnesium alloy EPC process[J].AFS Trans.,2001(14):425-438.
5LAWRENCE M D,RAMSAY C W.Some observations and principles for gating of lost form casting[A].AFS Transactions[C].DesPlaines.Ilinois.USA:American Foundrymens Society,Inc.Special Publications,1998.349.
6HILL M,VRIEZE A E.Effect of metal velocity on defect formation in Al LFCs[A].AFS Transactions[C].DesPlaines,Illinois,USA:American Foundrymens Society.Inc.Special Publications,1998.365.