试验研究了ＥＰＳ，ＰＭＭＡ，ＥＰＳ－ＰＭＭＡ共聚物模样铸钢件表面增碳的规律。认为新开发的ＥＰＳ－ＰＭＭＡ共聚物材料兼收了ＥＰＳ，ＰＭＭＡ二者的优点，是目前应用于气化模铸造生产铸钢件的良好材料 The rules of carbonation on the surface of castings of EPS, PMMA and EPS-PMMA copolymers were experimentally studied. It is considered that the newly developed EPS-PMMA copolymer material combines the advantages of both EPS and PMMA and is a good material currently used in the production of steel castings by gas-phase die casting