Alloys or metallic compositions – Aluminum base
Patent
1991-03-21
1992-02-25
Dean, Richard O.
Alloys or metallic compositions
Aluminum base
75686, 420590, C22C 100, C22C 2100
Patent
active
050911490
ABSTRACT:
A manufacturing method of aluminum-lithium alloy by atmospheric melting in which oxidation of lithium is minimized through improvement of degassing system under normal atmospheric melting method without using separate hermetically sealing device for isolating from atmosphere upon melting of alloy material.
The method is carried out in that aluminum and other alloy elements except metal lithium are melted in atmosphere, and primary degassing process is executed in a state that surface of the molten metal is covered with a flux such as LiCl or LiF, and then metal lithium ingot covered with aluminum is added to molten metal and secondary degassing process is executed with bubbling inert gas and thereafter tertiary degassing process is executed by flowing inert gas such as argon through hermetically sealed pouring path of molten metal.
REFERENCES:
patent: 4761266 (1988-08-01), Bruski
Chung Young H.
Lee Young Y.
Park Tai W.
Shin Myung C.
Sohn Keun Y.
Dean Richard O.
Koehler Robert R.
Korea Institute of Science & Technology
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