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Title:
鋳造インゴットにおける収縮巣の除去
Document Type and Number:
Japanese Patent JP2014501176
Kind Code:
A
Abstract:
An exemplary embodiment provides a method of eliminating a shrinkage cavity in a metal ingot cast by direct chill casting. The method involves casting an upright ingot having an upper surface at an intended height. Upon completion of the casting, the lower tip of the spout is maintained below the molten metal near the center of the upper surface. The metal flow through the spout is terminated and a partial shrinkage cavity is allowed to form as metal of the ingot shrinks and contracts. Before the partial cavity exposes the lower tip of the spout, the cavity is preferably over-filled with molten metal, while avoiding spillage of molten metal, and then the flow of metal through the spout is terminated. These steps are repeated until no further contraction of the metal causes any part of the upper surface to contract below the intended ingot height.

Inventors:
Mark Anderson
Todd F Bischoff
James Buahman
Wayne Jay Fenton
David Sinden
John Stephen Tingy
Robert Bruce Wagstaff
Application Number:
JP2013544988A
Publication Date:
January 20, 2014
Filing Date:
December 21, 2011
Export Citation:
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Assignee:
NOVELIS INC.
International Classes:
B22D11/10; B22D7/00; B22D11/049
Domestic Patent References:
JPS53102227A1978-09-06
JPS51115263A1976-10-09
JPH02211955A1990-08-23
JPH0726057U1995-05-16
JPH07112241A1995-05-02
JPH0327851A1991-02-06
JPS63268560A1988-11-07
JPH0824996A1996-01-30
JPS53102227A1978-09-06
JPS51115263A1976-10-09
JPH02211955A1990-08-23
JPH0726057U1995-05-16
JPH07112241A1995-05-02
JPH0327851A1991-02-06
JPS63268560A1988-11-07
JPH0824996A1996-01-30
Attorney, Agent or Firm:
Samejima Mutsumi
Kyousei Tamura
Keiichi
Norihito Yamao



 
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