铸钢件的铁型覆砂铸造工艺与实践

Process and Practice of Sand-lined Metal Molding Technology for Steel Casting

从铸钢熔点高、钢液流动性差、缩尺大等方面的特性阐述了铸钢件铁型覆砂铸造工艺特点,介绍了铁型覆砂铸造用覆膜砂及其在生产铸钢件时需要更高耐火度和低发气的要求。以铸钢闸瓦托为例,从产品结构确定分型和取芯方式,采用顺序凝固的方法设计一型六件的浇注工艺。结果表明,通过计算机模拟对工艺的可行性进行验证,最终实现产品批量生产。

The characteristics of sand-lined metal mold for steel casting process were described from the aspects of high melting point,poor fluidity of molten steel and large shrink,etc.The film coated sand for sand-lined metal mold sand casting and its requirements for higher refractoriness and lower gas generation in the production of casting steel were introduced.Taking cast steel brake shoe holder as an example,the parting and core-taking methods were determined from the product structure,and the pouring process of one mould and six pieces was designed by sequential solidification method.The results show that the feasibility of the process is verified by computer simulation,and the product mass production is finally realized.