EP 1391255 A2 20040225 - METHOD FOR PRODUCING BLANKS HAVING A FINE-GRAIN STRUCTURE
Title (en)
METHOD FOR PRODUCING BLANKS HAVING A FINE-GRAIN STRUCTURE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON ROHLINGEN MIT FEINKORNSTRUKTUR
Title (fr)
PROCEDE DE PRODUCTION D'EBAUCHES AYANT UNE STRUCTURE A GRAINS FINS
Publication
Application
Priority
- RU 0200152 W 20020402
- RU 2001108871 A 20010404
Abstract (en)
The invention relates to plastic working of metals, in particular, to a method of fabricating workpieces of metals and alloys by plastic deformation, including fabrication of long-length workpieces with a conditioned fine-grained structure, in particular, with a submicrocrystalline and nanocrystalline structure. The method enables the production of longitudinally laminated and internally reinforced workpieces, and can be utilized for processing workpieces from powdered metal components to obtain a solid article. The plastic deformation is performed by extrusion in an extrusion container using a shaping tool arranged in an extrusion channel, which directs the flow of metal and creates a combined intensive upsetting/shear/torsional plastic deformation pattern with simultaneous recovery of the workpiece cross-section area without impairing the continuity. The method reduces expenditures for processing workpieces owing to the use of commercially available equipment, e.g. vertical and horizontal hydraulic presses, and allows processing of workpieces from hard-to-deform and low-plastic alloys, powdered metals, composite materials, as it increases the use factor of the workpiece metal. <IMAGE>
IPC 1-7
IPC 8 full level
B21J 5/00 (2006.01); B21C 1/00 (2006.01); B21C 23/00 (2006.01); B21C 23/01 (2006.01); B21C 25/02 (2006.01); B21J 5/06 (2006.01); B21J 13/02 (2006.01); C22F 1/00 (2006.01)
CPC (source: EP US)
B21C 1/00 (2013.01 - EP US); B21C 23/00 (2013.01 - EP US); B21C 23/001 (2013.01 - EP US); B21C 23/01 (2013.01 - EP US); B21C 25/02 (2013.01 - EP US); C22F 1/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1391255 A2 20040225; EP 1391255 A4 20050928; AU 2002255398 A1 20021021; CA 2443374 A1 20021017; IL 158203 A0 20040512; JP 2004531398 A 20041014; RU 2191652 C1 20021027; US 2004112112 A1 20040617; WO 02081762 A2 20021017; WO 02081762 A3 20021128
DOCDB simple family (application)
EP 02724834 A 20020402; AU 2002255398 A 20020402; CA 2443374 A 20020402; IL 15820302 A 20020402; JP 2002579524 A 20020402; RU 0200152 W 20020402; RU 2001108871 A 20010404; US 47411403 A 20031006