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铸件结构局部在组织、硬度、性能等方面有特殊要求,如主轴箱的轴孔,缸盖的燃烧室等。这些要求可用提高铸件整体材质来满足,但有鞭长莫及之感,亦可用冷铁、涂料、非石英质铸造用砂等工艺措施来解决,但受材料来源、成本等因素制约。我们就地取材,用车间的铸铁丸和现用的合脂或桐油小件芯砂配制铁丸芯砂(配比见表),用在铸件有特殊要求部位的型芯上。由于铁丸蓄热
Casting part of the structure in the organization, hardness, performance and other aspects of the special requirements, such as the spindle box shaft hole, cylinder head combustion chamber. These requirements can be used to improve the overall quality of castings to meet, but there is no sense of whip, cold iron, paint, sand and other non-quartz casting process measures to solve, but the material source, cost and other factors. We draw on the spot, with the cast iron pellets and the existing fat or tung oil small pieces of core sand preparation iron core sand (ratio table), used in the casting parts have special requirements on the core. As iron pills heat storage