| Nowadays,70 percent of parts of automobile, electrical appliance, electric machinery and instrument and meter and 80 percent of that of plastics and metalwork are manufactured by die equipment. With the development of the industry and productivity, The new kind of die materials with higher efficiency, lower cost, saving materials and good quality are excepted to meet demands of dies industry development. Most of the large-scale stamping die materials are forging die steel(foundation is iron casting ),of which forging envelope are very large due to its assemble style in the real fabrication and it take more time and strength, further, the assemble error are presence. Thus, large-scale stamping die made of high performance ductile cast iron instead of forging die steel is important develop direction. So, study and exploiture of advanced foundry technique using good performance and castforem manufacturability of ductile cast iron instead of forging die manufacturing large-scale stamping die will bridge a domestic gap and promote development of castings industry and die industry greatly. It has extensive long term potential in actual die production and it has important significance not only on novel material and new production exploiture but also on economic benefit. The alloyage of the ductile cast iron under the condition of EPC is studied in this article, which indicates that the input of alloying elements such as Cu,Sb change the graphite shape and improve the circularity of the graphite, increase the quantity of the graphite balls in the same time . The best efficiency appears under the condition of 0.02%Sb and 0.5Cu alloyage and the graphite balls are small, round and the content pearlite increase in the matrix, so that the mechanical property increase greatly. The effect of Sb on the ductile is sufficient ,for example ,The ductile of alloys decease obviously due to the additions of 0.01% Sb. In the two difference of process condition disappear die and sand mould, by...
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