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结合消失模铸件凝固仿真数值模拟分析系统,对内燃机缸体的主油道机油铸孔内壁粘砂现象、干式缸套结构缸体冷却水套内壁出现的夹杂和夹砂结疤缺陷进行了铸型典型截面代表性位置采温点的温度场分析;借助扫描电子显微镜和X-ray(液氮制冷硅漂移能谱仪)测试其元素组成和相对含量。采用单侧半开放中注式浇道系统,辅之以顶部分散型溢流小冒口,研究了排量为1~2.5 L的四缸发动机无缸套汽油机缸体、四缸干式缸套汽油机缸体、四缸干式缸套柴油机缸体和四缸湿式缸套柴油机缸体的消失模成形技术,其中四缸湿式缸套柴油机缸体消失模铸件实现了大批量生产,铸件合格率达到92.0%。
Combined with the simulation system of the solidification simulation of the lost foam casting, the phenomenon of sticking sand in the inner wall of the engine oil gallery of the internal combustion engine cylinder block, the inclusions in the inner wall of the cooling water jacket in the dry cylinder liner structure, Temperature field analysis of the typical location of the typical cross-section temperature and temperature; elemental composition and relative content were measured by scanning electron microscopy and X-ray (liquid nitrogen-cooled silicon drift spectrometer). The semi-open middle-pouring sprue system was used, with the top scattered overflow small riser. The four-cylinder engine cylinderless gasoline engine cylinder with displacement of 1 ~ 2.5 L and the four-cylinder dry cylinder liner Gasoline cylinder, four-cylinder dry-cylinder diesel engine cylinder liner and four-cylinder wet cylinder liner of the lost foam molding technology, including four-cylinder wet cylinder liner diesel engine lost foam casting to achieve mass production, casting pass rate reached 92.0%.