Process for the shielding of a casting stream in a casting appar

Details Process for the shielding of a casting stream in a casting appar Process for the shielding of a casting stream in a casting appar

1978-07-27

1980-04-29

Baldwin, Robert D.

Metal founding

Process

Shaping liquid metal against a forming surface

164 82, 164259, 164415, B22D 1110

Patent

active

042001382

ABSTRACT:
A process for shielding molten metal of a casting stream in a casting apparatus from oxidation by the ambient atmosphere which comprises enclosing the casting stream in an atmosphere which consists essentially of a mixture of an inert gas such as nitrogen as a carrier and a reactive gas, such as a hydrocarbon, capable of reacting with oxygen in the melt. The gas atmosphere preferably consists of a mixture containing 5 to 20% by volume of the reducing gas, namely, the hydrocarbon, the balance being the carrier gas namely nitrogen. Any conventional technique can be used to ensure that the gas mixture covers the casting stream.

REFERENCES:
patent: 3482621 (1969-12-01), Halliday
patent: 3608621 (1971-09-01), Bollig et al.
patent: 3908734 (1975-09-01), Pollard

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