Explanation

The nickel based high temperature alloy can be directly casting or directional solidification from the qualified parent alloy after remelting into the blank or part. Compared with nickel-base wrought superalloy. nickel-base cast superalloy has coarse solidification structure and high high temperature strength; More alloy elements can be added for strengthening, and the number of strengthening phase can reach more than 65%, thus greatly increasing the service temperature; The turbine blades and guide vanes with very complex cooling cavity can be foundry to greatly increase the turbine inlet temperature of the engine. Almost without exception, the high-pressure turbine blades and guide vanes of modern advanced aeroengines and gas turbines are made of nickel-base cast superalloy. And most of them have complex shaped cooling channels.

Classification