FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may in production of nanocrystalline structure of metals. Billet is subjected to jumping and extrusion. Extrusion is performed by displacing metal from cylindrical billet edges into cylindrical section and backwards. Note here that billet shape and sizes are retained. Jumping and extrusion are executed by hollow male die, solid male die fitted in the latter, and moving round plate. Arranged plate diameter D is defined from the following equality: 
where: d is solid male die diameter. Extrusion is executed by displacing shifted metal of billet cylindrical and edge sections at the rates related by above specified relationship.
EFFECT: higher degree of deformation, shorter process.
2 cl, 5 dwg
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