1)Inconel718 nickel based superalloy is a kind of strengthened nickel iron based alloy, it has high yield strength, tensile strength and rupture strength at temperature of lower than 700℃, it has good plasticity at temperature of 650-760℃.

The structure of this alloy is stable, has low diffusion rate of elements, aging hardening is very slow, it has good formability and weldability both in the state of aging and solid solution. It is widely used in manufacturing complicated high temperature components in areas of petroleum, coal, power, aerospace, chemical and national defense, High strength nickel based super alloy Inconel 718 has wide usage, but it is difficult to produce, it is particularly difficult to be machined, machining and processing cost is rather high.