中文摘要：

采用Pro/E三维建模,通过ProCAST软件模拟了模铸法制备3.1t的GCr15扁锭的凝固过程,分析了钢锭充型过程中温度场及固相率,预测了钢锭可能产生缩松和缩孔缺陷的位置,研究了其宏观铸造组织。利用扫描电镜（SEM）观察了其微观组织,使用屏显式材料端面高温摩擦磨损试验机研究了微观组织结构对摩擦磨损特性的影响。结果表明,钢锭的凝固顺序：轴向上由钢锭底部向钢锭帽头处推进,径向上从型壁向钢锭的中心逐步进行;钢锭的缩孔集中在帽头部位,钢锭中心易产生缩松;条状、六方棱柱状的M7C3型碳化物对GCr15铸锭的耐磨性影响显著。

英文摘要：

The solidification process of GCr15 slab prepared by mould casting method was visualized by means of ProCAST softwave based on Pro/E modeling.The temperature field and solidification fraction of steel ingot were analyzed to visualize the potential shrinkage porosities（holes）position.In addition,the macro-structure was observed.The microstructure of the slab was observed by scanning electron microscopy（SEM）.The effects of microstructure on friction and wear behavior of the slab were analyzed by display material-end high temperature wear-frictional tester.The results reveal that the solidification tendency of the ingot is advanced from the bottom to the top of steel ingot and radially from the mold wall to the center of the ingot.In addition,the shrinkage holes are concentrated in the cap of the ingot,and shrinkage porosities are easily formed in the center of the ingot.The strip-like and hexagonal prismshaped M7C3 carbides have greatly effects on the wear resistance of the GCr15 slab.