from the conferences organized by TANGER Ltd.
Mechanical characteristics of the creep-resisting alloy IN 713 LC depends on its content and material purity, furthermore on the structure and structural non-homogeneities. Significant influence on the material properties, for its usage, has the way of crystallization, modification of the grain structure secured by technological setup of the casting tree and special directed insulation of the tree.The aim was to realize the tests on the samples to achieve definition of casting process and sequential detail grain structure study of the directed solidified castings with higher mechanical properties at higher temperature. The samples were analyzed by RTG and FPI method and cut for additional testing. Interesting data were obtained in these areas: grain size and structure with dependence to the casting temperature, the shell annealing temperature and insulation by ceramic wool – Sibral, on the specified places defined with the insulation thickness to ensure surface controlled crystallization in the casting. Part of the study was aimed to cost reduction during process and definition of the necessary technological changes to reach profitability of the product.
Keywords: Turbine wheel, wax model, IN713LC, casting© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.