METHOD OF RECLAIMING OPERATING PROPERTIES OF VANES MADE FROM TITANIUM ALLOYS Russian patent published in 2011 - IPC B23P6/00 C21D6/00 C22F1/18 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used for recovery of operating performances of the vanes of steam turbines, gas transfer plants and gas turbine engines, made from titanium alloys. Proposed method comprises vane non-destructive testing, dismantling vanes form the rotor, removing defective surface metal layer, holding the vane in vacuum and thermal treatment. The latter is performed by heating, holding in vacuum for, at least, for vane metal degassing and reduction of its dislocation structure, and cooling down in vacuum to ambient temperature. Heating is performed at 350°C…500°C. Holding in vacuum is carried out at said temperature for 0.2-1.5 h. Note here that holding and cooling in vacuum is performed under longitudinal magnetic field of intensity varying from 10 kA/m to 100 kA/m.

EFFECT: reduced labour input, higher operating performances of vanes.

21 cl, 9 tbl, 1 ex