Patent ID: 6997995
Filing Date: 2006-02-14
Classification: C22F

Abstract:
1. A method for producing heavy-duty components from α+γ TiAl alloys for aircraft engines or stationary gas turbines, in that preshaping encapsulated TiAl preforms of globular structure by isothermal primary shaping in the α+γ or α phase area in a temperature region of 1000° C. to 1,340° C. by forging or extrusion molding; shaping the preforms by forging to form components with a specifiable contour by at least one isothermal secondary shaping process simultaneously with dynamic recrystallization in the α+γ or α phase area in the temperature region of 1000° C. to 1,340° C. in an inert atmosphere, said preshaping and shaping steps be carried out in a heated tool of molybdenum or graphite; adjusting the microstructure of the components by solution annealing in the α phase area and cooling subsequently rapidly.