National University of Science and Technology “MISiS”, Moscow, Russia:

A. V. Koltygin, Assistant Professor of a Chair of Casting Process Technologies, e-mail: misistlp@mail.ru
V. E. Bazhenov, Senior Lecturer of a Chair of Casting Process Technologies
A. V. Fadeev, Leading Engineer of Engineering Center “Innovation Casting Technologies and Materials”

This article considers the issues, associated with obtaining of thin-dimensional castings of titanium alloy by precision casting into shell molds. There were observed the peculiarities of computer simulation of casting and solidification using ProCast program. Liquidus and solidus temperatures of the VT20L (ВТ20Л) alloy were updated on the basis of literature data analysis and the results obtained by simulation of equilibrium and nonequilibrium (Sheil-Gulliver model) solidification conditions of multicomponent phase diagrams of Ti – Al – Mo – V – Zr alloys, using the software package for thermodynamic calculations Thermo-Calc (Thermo-Calc Software). Thermodynamic database software package for foundry simulation ProCast (ESI Group) was used for the purpose of specification of thermal properties of VT20L alloy. The obtained data were compared with VT20L alloy data in the Branch Standard 1.90060–92 and Technical Requirements 1-92-184–89. Refinement of thermal-physic properties of refractory material of alumina shell was carried out. Computer simulation of cast, used for manufacturing of the “central hub” part of separating case was carried out on the basis of the specified thermal data. This cast was used in construction of 14 tons power long-range two-shaft turbojet engine (PD-14) (ПД-14). Filling and solidification parameters were corrected as a result of simulation construction of the gating system. It is shown that unrecoverable shrinkage defects should not occur in casting during solidification in the centrifugal force field. Some of production peculiarities for these types of castings were described.
This article was written within the Agreement on November 21, 2012, No. 40/10-30958 “Development of technology of production of high-loaded large thin-walled details, made of titanium alloys, for aerospace turbineconstruction” within the Governmental Regulation RF No. 218 (3 order).
Agreement between the JSC “Ufa Engine Industrial Association” and the Ministry of Education and Science RF on February 12, 2013, No. 02. G25.31.0009.

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