解剖、分析了国外细晶铸造IN718压气机叶片.结果表明：该叶片叶身部分的晶粒细小，晶粒度可达ASTM2～4级，无柱状晶，均为等轴晶，组织均匀、偏析轻，未见疏松等明显铸造缺陷，接近锻造叶片的组织结构，有望实现“以铸代锻”的目标. The results show that the leaflets of the blade have small grain size and the grain size can reach ASTM2 ~ 4, with no columnar crystals, all of which are equiaxed grains with uniform microstructure and segregation Light, no apparent casting defects such as loose, close to the organizational structure of forged leaves, is expected to achieve the “cast forging” goal.