METHOD TO PRODUCE TITANIUM ALLOYS WITH SUB MICROCRYSTALLINE STRAIN STRUCTURE ALLOWING INTENSIVE PLASTIC STRAIN Russian patent published in 2010 - IPC B21J5/00 C22F1/18 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and can be used to produce articles form semi-manufactured articles made by thermo mechanical processing that increase higher physical-mechanical properties. Said semi-manufactured article is subjected to consecutive compression along axes Z, X and Y to allow free flowage of its material. Compression along said axes is performed at least once. Produced convex-prism-shape workpiece is subjected to stage-by-stage deformation. During said stages at least single compression is performed along new axes Z₁, X₁ and Y₁. Said axes are produced by turning respective axes of previous stage through 30-60°. Note here that new axes Z₁ and X₁ are allowed to cross opposite apices of the prism, while axis Y₁ can cross the center and prism opposite faces. Workpiece compression along said axes is carried out till convex-shape-prism is produced with the following parametres: c/a ≤ 1.5; c/b ≤ 1.5; a/b ≈ 1, where a, b, c are length of prism face length.

EFFECT: production of alloys with more uniform sub microcrystalline structure in volume.

13 cl, 1 dwg, 1 tbl, 3 ex