Casting of aluminum based wrought alloys and aluminum based...

Metal founding – Process – Shaping liquid metal against a forming surface

Reexamination Certificate

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C164S055100

Reexamination Certificate

active

11002726

ABSTRACT:
Preferred embodiments of the present invention include methods that allow for casting alloys, and preferentially casting wrought alloys to circumvent problems such as, for example, hot tearing. Preferred embodiments of the present invention provide for alloys having predominantly spherical primary α-aluminum grains in their microstructure (i.e., substantially free of dendrites) formed by mixing two liquids of differing compositions that are held at predetermined temperatures, such that when mixed they produce a predetermined alloy composition at a predetermined temperature that is inclined to solidify with a predominantly spherical grain structure that minimizes the alloy's tendency towards hot tearing.

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Fuminori, Patent Abstracts of Japan, Publication No. 11279670, Publication Date: Oct. 12, 1999, “Master Alloy for Regulating Content of Magnesium to be Used at the Time of Recasting Zinc Alloy”.
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XP002317271; ISBN: 0-87433-157-9: Collective: Aluminum Casting Technology, 2ndEdition, 1993, AFS American Foundry Men Society Inc., pp. 66-67.
XP002317272: ISBN: 0-87433-157-9: Collective: Aluminum Casting Technology, 2ndEdition, 1993, AFS American Foundry Men Society Inc., pp. 28-39.

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