中文摘要：

扔技术的金属模子微米规模精确成功地被开发，并且在微米规模的三尺寸的复杂微齿轮铸造物被生产。微齿轮铸造物的发展整齐被光显微镜观察并且扫描电子显微镜。与常规扔相比，微扔被描绘由典型非平衡团结例如，它的谷物尺寸能显著地被精制，最容易溶解的结构从薄片状的形态学被转变到杆 eutectic，并且主要阶段的比率被增加。这种微观结构能支持微扔的机械性质。

英文摘要：

Metal mold micron scale precision casting technology was developed successfully, and three-dimension complicated microgear castings in micron scale were produced. Evolvement regularity of microgear castings were observed by optical microscope and scanning electron microscope. Compared with conventional casting, microcasting is characterized by typical nonequilibrium solidification, for example, its grain size can be refined significantly, eutectic structure is transformed from lamellar morphology to rod eutectic, and the ratio of primary phase is increased. This kind of microstructure can promote mechanical properties of microcasting.