Method for obtaining a product made of titanium alloy or a titanium-aluminium intermetallic compound
AssigneeSafran
InventorPierre Jean Sallot
Life of this patent
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Abstract
A method for obtaining a product made of titanium alloy or a titanium-aluminum intermetallic compound by plasma torch melting, the alloy having an oriented structure, the method including heating the molten alloy surface in a casting ring with a plasma torch; cooling a cold zone of the casting ring over a length L1, the cooling forming a semi-solid crown of alloy; heating a hot zone of the casting ring over a length L2, thereby forming a solidification front, the flatness of which relative to a plane perpendicular to a drawing direction is less than 10°; and drawing the solidified alloy at a speed of more than 10−4 m/s in the drawing direction. The present disclosure also relates to a plant having one or more devices for implementing the method.
Claims7
A method for obtaining a product made of a titanium alloy or a TiAl intermetallic compound by plasma torch melting, the alloy having an oriented structure, the method comprising:
- heating, with a plasma torch, a molten alloy or compound surface at a casting ring;
- cooling a cold area at the casting ring below the molten alloy or compound surface, over a length L1 at a temperature comprised between 0 and 50° C., thereby forming a semi-solid alloy or compound crown;
- heating, downstream of the cold area, a hot area over a length L2 at a temperature between Tf×0.8 and Tf×1.25, Tf representing the melting temperature of the molten alloy or compound, thereby enabling control of an alloy or compound solidification front at an outlet of the hot area, the alloy or compound solidification front having a flatness with respect to a plane perpendicular to a drawing direction of less than 10°;
- and
- drawing the solidified alloy or compound at a drawing speed higher than 10−4 m/s along the drawing direction.
Dependencies are inferred from the claim text.