Explanation

It refers to the high temperature alloy that can be directly casting or directionally solidified into parts blanks or parts after the qualified parent alloy is remelted. According to alloy matrix, it can be divided into iron base, nickel base and drill base. According to the solidification method, it can be divided into conventional precision casting equiaxed high temperature alloy, directionally solidified intergranular high temperature alloy and singlecrystal superalloy. The development of directional solidification technology in the 1960s promoted the vigorous development of directional columnar and singlecrystal superalloy, making the service temperature of aeroengine reach 2000K. Compared with wrought superalloy, raw superalloy has the following characteristics: forming coarse solidification structure to cause high-temperature strengthening; adding more alloy elements to strengthen and develop new alloy; It can foundry turbine blades and guide vanes with very complex cooling cavities; Excellent high-temperature strength and high operating temperature. Mainly used for making turbine blades and guide vanes for aviation engines and gas turbines.

Classification