METHOD OF THERMO-MECHANICAL TREATMENT OF TITANIUM BLANKS Russian patent published in 2006 - IPC C22F1/18 B21J5/00 

FIELD: mechanical engineering; aircraft engine manufacture and medicine.

SUBSTANCE: proposed method is accompanied by change in physico-mechanical properties of metal. Proposed method of production of ultra-fine-grain titanium blanks includes intensive plastic deformation of blanks in crossing vertical and horizontal channels at temperature of 500-250°C and thermo-mechanical treatment. Thermo-mechanical treatment including annealing and deformation is performed before intensive plastic deformation at stored logarithmic degree of deformation no less than 4.5; annealing is carried out at temperature not above temperature of polymorphous transformation minus 200°C; thermo-mechanical treatment is started at annealing temperature which is reduced in stepwise manner to temperature of intensive plastic deformation. Ultra-fine-grain structure is formed at lesser number of technological passes.

EFFECT: improved strength characteristics; reduced labor consumption; enhanced efficiency.

2 cl, 1 tbl, 1 ex