Title:
METHOD FOR MAKING ELONGATE ARTICLES OF SMALL CROSS-SECTIONAL AREA BY HOT GAS EXTRUSION
Document Type and Number:
WIPO Patent Application WO/1991/004809
Kind Code:
A1
Abstract:
The invention relates to the field of processing metals by pressure. According to the process, before extrusion of the blank (40) through the die (13), a bushing is placed in the gap between the cylindrical surfaces of a protrusion (41) and a section (16) of the die (13), said bushing (42) having an internal diameter of 0.03-0.05 mm smaller than that of the protrusion (41) and having an external diameter 0.03-0.05 mm larger than that of the section (16) and being made of a material whose elastic modulus is lower than that of the material of the blank and whose yield limit is approximately equal to that of the material of the blank at the temperature at the start of extrusion. The method is intended for making articles from brittle materials.
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Inventors:
BERBENTSEV VLADIMIR DEMIYANOVI (SU)
DERJUGIN VIKTOR FEDOROVICH (SU)
KOROTKOV VALERY VLADIMIROVICH (SU)
SEKISOV VADIM NIKOLAEVICH (SU)
DERJUGIN VIKTOR FEDOROVICH (SU)
KOROTKOV VALERY VLADIMIROVICH (SU)
SEKISOV VADIM NIKOLAEVICH (SU)
Application Number:
PCT/SU1989/000258
Publication Date:
April 18, 1991
Filing Date:
September 28, 1989
Export Citation:
Assignee:
INST FIZ VYSOKIKH DAVLENY IM L (SU)
International Classes:
B21C23/00; B21C23/08; (IPC1-7): B21J5/04
Foreign References:
| SU952402A1 | 1982-08-23 | |||
| SU1454561A1 | 1989-01-30 |
Other References:
L.V. PROZOROV et al., "Pressovanie Metallov Zhidkostiju Vysokogo Davlenia", 1972, Moscow, "Mashinostroenie", pages 136-138.
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