US Patent 7152662 Method of preventing cracking in direct chill cast ingots

Patent 7152662 was granted and assigned to Alcoa on December, 2006 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Alcoa

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

71526620

Patent Inventor Names

Ho Yu0

Date of Patent

December 26, 2006

Patent Application Number

106303870

Date Filed

July 30, 2003

Patent Primary Examiner

‌

Kuang Y. Lin

Patent abstract

A method of casting a metal ingot having the steps of delivering molten metal to a direct chill mold, forming a solidified shell of metal, applying a coolant to a surface of the shell as it emerges from the mold, and withdrawing a solidified ingot from the mold. The coolant contains an oxidation inhibitor for increasing the rate of heat transfer from the solidifying metal compared to a coolant not containing the oxidation inhibitor to produce an ingot which is resistant to cracking.