INVESTIGATION OF A BRAZED JOINT MICROSTRUCTURE FORMATION, MADE OF DISSIMILAR NICKEL SUPER ALLOYS AND THE COMPLEX BRAZING ALLOY

Abstract

Presents the results of studies on the microstructure an opposite combination of nickel heat-resistant alloys of a brazed joint. The chemical composition of the phases formed as a result of the interaction of the mono-crystal alloy VKNA-25, heat-resistant alloy EP975 and complex alloyed solder VPr56 was investigated. The main regularities of the microstructure of the brazed joint changes during heat treatment were established. The dependence is established and the formula is derived for obtaining the optimal microstructure of the brazed seam with different duration of heat treatment and the size of the assembly gap.