FEATURES OF INTEGRATED MANUFACTURE OF BLADE WORKPIECES FROM EUTECTICALLY STRENGTHENED TITANIUM ALLOYS

摘要

An integrated process is considered for preparing gas turbine engine compressor blade workpieces made of alloy VT22, eutectically strengthened with titanium boride. The efficiency of two-stage extrusion for alloy of the Ti-TiB_n system is demonstrated, with which in the first stage preliminary crushing of harder strengthening phase TiB_n is provided by deformation under all-round compression conditions and large shear strains, and in the second stage there is direct extrusion of a blade vane under conditions close to isothermal. It is shown that the processes implemented provide an increase in workpiece mechanical property ultimate strength compared with a cast structure within the blade root by 10-16%, and by .17-20% within the body of the blade vane.