CB2汽轮机缸体铸钢件型砂的使用及控制要点

Application and Control Key Points of Molding Sand for Steel Castings of CB2 Turbine Cylinder

根据CB2汽缸的结构特点、技术要求和碱酚醛树脂自硬砂和有机酯水玻璃自硬砂的特点,复合使用了这两种自硬砂进行了汽缸钢铸件的浇注试验。实践证明:两种型砂兼容互补,复合使用可提高落砂性,防止粘砂和裂纹,生产的铸件表面和内在质量良好,同时成本较低,是一个方便、实用、高效的方法。

According to the structural characteristics and technical requirements of CB2 turbine cylinder,and the characteristics of alkali phenolic resin self-hardening sand and organic ester water glass self-hardening sand,compound use of two kinds of self-hardening sand was determined and CB2 turbine cylinder steel castings were manufactured.The practice testifies that the two kinds of molding sand are compatible and complementary.Compound use of two kinds of self-hardening sand can improve the knockout capability,prevent burning-on and cracks,and the surface and internal quality of the castings are good.Since the cost is also low,the process method is convenient,practical and efficient.