EP 0389367 A1 19900926 - Method of making very fine-grained copper pieces from continuously cast blanks.
Title (en)
Method of making very fine-grained copper pieces from continuously cast blanks.
Title (de)
Verfahren zum Herstellen sehr feinkörniger Kupferteile aus Stranggussrohlingen.
Title (fr)
Procédé d'obtention de pièces en cuivre et de structure très fine, à partir d'un lopin issu de coulée continue.
Publication
Application
Priority
FR 8903751 A 19890322
Abstract (en)
[origin: US5039355A] The process according to the invention makes it possible to form parts from copper of high purity and fine structure. Beginning with a billet (1) made by continuous casting, it includes the following main phases: a kneading of the billet (1, 4) comprising upsetting and drawing cycles; cutting of the billet into blanks (8) each intended to form one finished part; an operation of die forging (9, 12) at ambient temperature; and a recrystallization heat treatment to obtain a grain size of the copper of less than 40 micrometers. The invention is applicable to the production of internal liners for shaped charges.
Abstract (fr)
Le procédé selon l'invention permet de former des pièces en cuivre de haute pureté et de structure fine.Il comprend, à partir d'un lopin (1) issu de coulée continue, les phases principales suivantes :- un malaxage du lopin (1, 4) constitué de cycles de refoulement et d'étirage ;- un tronçonnage du lopin en ébauches (8) destinées à former chacune une pièce finie ;- un formage en matrice (9, 12) à température ambiante ; et- un traitement thermique de recristallisation pour obtenir une taille de grain du cuivre inférieure à 40 micromètres.Application à la fabrication des revêtements internes des charges creuses.
IPC 1-7
IPC 8 full level
B21J 5/00 (2006.01); B21K 21/10 (2006.01); C22F 1/08 (2006.01); F42B 1/036 (2006.01)
CPC (source: EP US)
B21J 1/025 (2013.01 - EP US); B21J 5/00 (2013.01 - EP US); B21K 21/10 (2013.01 - EP US); C22F 1/08 (2013.01 - EP US); F42B 1/032 (2013.01 - EP); F42B 1/036 (2013.01 - EP US)
Citation (search report)
- [Y] FR 792240 A 19351226 - ALUMINIUM LTD
- [Y] FR 2599648 A1 19871211 - SAINT LOUIS INST [FR]
- [A] FR 2443044 A1 19800627 - FRANCE ETAT
- [A] DE 2358554 B1 19740808
- [A] DE 3515686 A1 19861106 - MESSERSCHMITT BOELKOW BLOHM [DE]
- [A] US 2312830 A 19430302 - ELDRED BYRON E
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI
DOCDB simple family (publication)
EP 0389367 A1 19900926; EP 0389367 B1 19940622; DE 69010043 D1 19940728; DE 69010043 T2 19950105; FR 2644714 A1 19900928; US 5039355 A 19910813
DOCDB simple family (application)
EP 90400775 A 19900321; DE 69010043 T 19900321; FR 8903751 A 19890322; US 49700790 A 19900320