DRAWING THE THIRD KIND RECRYSTALLIZATION CURVES OF TITANIUM ALLOY VT6

The last-stage working blade of the low-pressure cylinder of steam turbines is a high-tech and critical part that requires continuous improvement of manufacturing technology with the aim of improving operation factors and mechanical properties. Stamping and heat treatment are structure-forming operations, they determine the level and stability of turbine blades’ properties. This study is aimed at investigating the parameters of the thermal process of stamping the blanks of turbine blades made of titanium alloy VT6. The equipment for tests was engineered and manufactured, auxiliary calculations were performed. The compression tests with subsequent thermal treatment were performed. Recrystallization curves of the titanium alloy VT6 for two heat treatment conditions were constructed. We investigated three deformation degrees and test temperatures. The microstructure analysis of the tested specimens was carried out.