EP 0099066 B2 19920722 - PROCESS FOR MANUFACTURING A COMPOSITE ARTICLE FROM CHROMIUM AND COPPER
Title (en)
PROCESS FOR MANUFACTURING A COMPOSITE ARTICLE FROM CHROMIUM AND COPPER
Publication
Application
Priority
- DE 3226604 A 19820716
- DE 3322866 A 19830624
Abstract (en)
[origin: US4503010A] In the method according to the invention, Cr powder is poured into a degased mold, which can be made of graphite. On this Cr powder a piece of low-oxygen copper is placed. Subsequently, the mold is closed with a porous cover, which can also be made of graphite. Then the mold is degased in a high-vacuum furnace at room temperature until a pressure of better than 10-4 mb is reached. Thereafter, the furnace temperature is increased to as high as possible a temperature below the melting point of copper. This furnace temperature is maintained constant until an internal pressure in the furnace of better than 10-4 mb is reached. Subsequently, without intermediate cooling, the furnace temperature is further increased slowly to a final value of 100 degrees K. to 200 degrees K. above the melting temperature of the copper. This temperature is then maintained until the porosity contained in the Cr powder is completely filled up by the liquid copper.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
B22F 3/26 (2013.01 - EP US); H01H 1/0206 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI SE
DOCDB simple family (publication)
EP 0099066 A1 19840125; EP 0099066 B1 19860507; EP 0099066 B2 19920722; DE 3363383 D1 19860612; US 4503010 A 19850305
DOCDB simple family (application)
EP 83106620 A 19830706; DE 3363383 T 19830706; US 51347983 A 19830713