1.High degree of complex shape, the additional cost is less 2.Net costs can be reduced or eliminated for machining and finishing processes 3.High material utilization rate, 95% -98% of the material used in the product 4.Several requested features have similar size control 5.Flexibility in composition, microstructure and materials 6.Can wear or toughness requirements of heterogeneous microstructure 7.Good surface quality of …