铸铁耐磨片壳型铸造工艺设计及优化

Design and Optimization of Shell Mold Casting Process for Cast-iron Wear-resisting Plate

通过对耐磨片的形状、结构以及使用环境的分析,设计了耐磨片的化学成分和壳型铸造工艺方案,并用View Cast软件对铸件的凝固过程进行了数值模拟。结果显示,在浇注系统的顶层出现缩孔、缩松缺陷。根据数值模拟结果结合理论分析,对铸造工艺方案进行了改进。通过增大直浇道直径和高度来对铸件进行补缩和实现铸件的顺序凝固。模拟结果表明,优化后的工艺能有效地消除缩松、缩孔缺陷。

Through analysis of the shape, structure and using environment for the wear-resisting plate, the chemical composition and shell casting process of wear-resisting plate were designed. The solidification process of the castings was numerically simulated by using the View Cast software. The results show that the shrinkage cavity and shrinkage porosity defects appear on the top of casting system. According to the results of numerical simulation combined with theoretical analysis, the casting process scheme was improved. Feeding of castings was carried out by amplifying the diameter and height of the sprue, so that the progressive solidification of casting was realized. The simulation results show that the optimized process can effectively eliminate the shrinkage cavity and shrinkage porosity defects.