METHOD FOR PRODUCING HOMOGENOUS FINE-GRAIN TITANIUM MATERIAL (VARIANTS) Russian patent published in 2008 - IPC C22F1/18 B21J5/06 

FIELD: metallurgy, possibly production of homogenous fine-grain titanium material.

SUBSTANCE: according to first variant of invention method comprises steps of first heat treatment of blank of titanium material due to heating it till β-region; quickly cooling blank till (α + β)-region and forging it while creating at deforming process super-plasticity condition; then performing second heat treatment due to realizing recrystallization annealing for producing grain size in range approximately from 5 micrometers till 20 micrometers. According to second variant of method blank of double-phase titanium material is subjected to first heat treatment due to heating it till β-region. Heating temperature is in range approximately from 600°C till approximately temperature of polymorphous phase conversion of titanium material. Blank is quickly cooled till (α + β)-region and it is subjected to forging while creating super-plasticity condition. Then second heat treatment is realized due to performing recrystallization annealing. In the result double-phase material with grain size 15 - 20 micrometers is produced.

EFFECT: possibility for producing material that may be subjected to ultrasound flaw detection at high accuracy.

14 cl, 8 dwg, 3 tbl, 5 ex