Taken full mold casting stamping die as samples

the basic procedure and key caution of bimetal casting process were described.Foamed pattern adopted EPS materials with 17kg/m3 in density with conventional graphite water-based coating and cold cured furan resin sand mould.Open gating system was designed

where the first package liquid iron（HT300with Cr and Mo）was poured into the mould at 1 360℃

and the second package liquid iron（HT300）was poured into the mould ahead of 2

3

scompleting the first package pouring with 2times of the first package weight.The results show that the size

appearance and color of the castings produced meet the quality requirement.After heat treatment

the hardness of the bottom and upper working surface reaches 195（HBS）and 170（HBS）

and tensile strength is more than 300 MPa.