Countergravity Casting Apparatus and Desulfurization Methods
AssigneeRaytheon Technologies Corporation
InventorsJohn J. Marcin, JR., Alan D. Cetel, Mario P. Bochiechio, Reade R. Clemens
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Abstract
An apparatus for countergravity casting a metallic material, comprises: a crucible for holding melted metallic material; a casting chamber for containing a mold; a fill tube capable of extending into the crucible to communicate melted metallic material to the casting chamber; a gas source coupled a headspace of the melting vessel to allow the gas source to pressurize said headspace to establish a pressure differential to force the melted metallic material upwardly through said fill tube into said mold; and means for gettering sulfur.
Claims20
A countergravity casting apparatus comprising:
- a melting crucible;
- a casting mold;
- a flowpath from the melting crucible to the casting mold;
- and
- a filter along the flowpath, wherein at least one of:
- the filter comprises a sulfur-gettering material;
- and
- a source of sulfur-gettering particles is upstream of the filter and the filter is effective to filter the sulfur-gettering particles.
An apparatus for countergravity casting a metallic material, the apparatus comprising:
- a melting vessel;
- a casting chamber containing a mold;
- a fill tube capable of extending into the melting vessel to communicate melted metallic material to the casting chamber;
- and
- a gas source coupled a headspace of the melting vessel to allow the gas source to pressurize said headspace to establish a pressure differential to force the melted metallic material upwardly through said fill tube into said mold,
- wherein at least one of the melting vessel, fill tube, and mold has at least a surface layer of a sulfur-gettering material of greater sulfur-gettering ability than alumina and zirconia.
An apparatus for countergravity casting a metallic material, the apparatus comprising:
- a crucible for holding melted metallic material;
- a casting chamber for containing a mold;
- a fill tube capable of extending into the crucible to communicate melted metallic material to the casting chamber;
- a gas source coupled a headspace of the melting vessel to allow the gas source to pressurize said headspace to establish a pressure differential to force the melted metallic material upwardly through said fill tube into said mold;
- and
- means for gettering sulfur.
Dependencies are inferred from the claim text.