Method of manufacturing copper alloy containing active metal

(19)

(11)

EP 0 717 119 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	21.08.1996 Bulletin 1996/34

(43)	Date of publication A2:
	19.06.1996 Bulletin 1996/25

(21)	Application number: 95307543.9

(22)	Date of filing: 24.10.1995

(51)	International Patent Classification (IPC)⁶: C22C 1/02, C22C 9/00

(84)	Designated Contracting States:
	DE

(30)

Priority:

25.10.1994 JP 260447/94

(71)	Applicant: NIPPON MINING & METALS COMPANY, LIMITED
	Tokyo 105 (JP)

(72)	Inventor:
	Shimada, Takashi, c/o Kurami Works of Nippon Koza-gun, Kanagawa-ken (JP)

(74)	Representative: Harvey, David Gareth et al
	Graham Watt & Co. Riverhead Sevenoaks Kent TN13 2BN Sevenoaks Kent TN13 2BN (GB)

(54)	Method of manufacturing copper alloy containing active metal

(57) When a copper alloy containing a metal more reactive with oxygen than copper is melted and cast, a feedstock is vacuum melted with an induction melting furnace (4) within an airtight container (5) which has been vacuum evacuated, and thereafter positive pressure is applied (via pipe 26) to the airtight container (5), and the molten metal is discharged from the furnace through a pouring siphon (32) for continuously casting in a mold (51). Said positive pressure is exerted using an inert gas.

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