CONTROL OF THE PROCESSES OF PHASE FORMATION OF CARBIDE COMPONENTS IN NICKEL-BASED SUPERALLOYS
Keywords:phase formation, weldable nickel-based superalloy, carbides, distribution of alloying elements, precipitation (dissolution) temperatures of carbides
The mathematical dependences of thermodynamic processes of precipitation of carbide phases are determined, and a practical study of the structure and distribution of chemical elements is carried out. Regularities were established for the effect of the chemical composition of the alloy on the morphology and type of carbides. It is shown that, depending on the introduced chemical elements in the system, the types of carbides and their chemical composition can change, which leads to a decrease in the processes of crack formation in the material. The established dependencies for the multicomponent system Ni-22.5Cr-19Co-1.9Al-3.7Ti-2W-1.4Ta-1Nb-0.15C make it possible to determine the chemical composition of carbides from the chemical composition of the alloy. The evaluation of the results obtained by the calculation method and experimental data was carried out, the analysis of the results gave good convergence and can be recommended for industrial use.