METHOD OF OBTAINING MATERIAL WITH ULTRA FINE-GRAINED OR SUBMICROCRYSTALLIC STRUCTURE BY DEFORMATION WITH MAINTAINING OF INTENSE PLASTIC DEFORMATION (VERSIONS) Russian patent published in 2008 - IPC B21J5/00 C22F1/00 

FIELD: technological processes.

SUBSTANCE: sequential blank compression in through rectangular matrix channel is performed in stages. Difference between channel side sizes is 0.5-1%. After each stage the blank is remounted. According to first variant, compression is performed by repeating cycles, each cycle consisting of three stages. At the first stage compression is performed along Z axis with material flow along Y axis and deformation restriction along X axis. At the second stage compression is performed along X axis with material flow along Z axis and deformation restriction along Y axis. At the thrid stage compression is performed along Y axis with material flow along X axis and deformation restriction along X axis. According to second variant, at the first two stages compression is performed in the same pattern. For the third an each next uneven stage blank is remounted along diagonal matrix channel. At the third stage compression is performed with X and Z axes rotation at an angle close to 45°.

EFFECT: intense plastic deformation of blank material maintained.

22 cl, 6 dwg, 4 ex, 1 tbl