Title:
ニッケル基合金の大直径インゴットの製造方法
Document Type and Number:
Japanese Patent JP4245351
Kind Code:
B2
Abstract:
A method of producing a nickel base alloy includes casting the alloy within a casting mold and subsequently annealing and overaging the ingot at at least 1200°F (649°C) for at least 10 hours. The ingot is electroslag remelted at a melt rate of at least 8lbs/min (3.63kg/min), and the ESR ingot is then transferred to a heating furnace within 4 hours of complete solidification and is subjected to a post-ESR treatment. A suitable VAR electrode is provided from the ESR ingot, and the electrode is vacuum remelted at a melt rate of 8 to 11 lbs/minute (3.63 to 5kg/minute) to provide a VAR ingot. The method allows premium quality VAR ingots having diameters greater than 762 mm (30 inches) to be prepared from Alloy 718 and other nickel base superalloys subject to significant segregation on casting.
Inventors:
Bond, Betsey Jay
Lawrence A. Jackman
Ballantine, A. Stuart
Lawrence A. Jackman
Ballantine, A. Stuart
Application Number:
JP2002571947A
Publication Date:
March 25, 2009
Filing Date:
February 25, 2002
Export Citation:
Assignee:
81 Properties Incorporated
International Classes:
B22D23/10; B22D7/00; C22B9/14; C22B9/20; C22B19/18; C22B23/00; C22B23/06; C22C19/03; C22C19/05; C22F1/00; C22F1/10
Domestic Patent References:
| JP4059376B2 | ||||
| JP3145091B2 | ||||
| JP9241767A |
Other References:
MOYER,THE MINERALS,METALS & MATERIALS SOCIETY,1994年,P39-48
CORDY,THE PROCEEDINGS VAC. METALL. CONF. SPEC. METALL. MELTING PROCESS.,1984年,P69-74
KISSINGER.,ELECTRON BEAM MELTING AND REFINING,米国,1992年10月,P31-40
CHOUDHURY,ISJ INTERNATIONAL.,1992年 5月,V32N5,P563-574
CORDY,THE PROCEEDINGS VAC. METALL. CONF. SPEC. METALL. MELTING PROCESS.,1984年,P69-74
KISSINGER.,ELECTRON BEAM MELTING AND REFINING,米国,1992年10月,P31-40
CHOUDHURY,ISJ INTERNATIONAL.,1992年 5月,V32N5,P563-574
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Tatsuo Tomizu
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Tatsuo Tomizu