US 12,083,589 B2
Method for obtaining a product made of titanium alloy or a titanium-aluminium intermetallic compound
Pierre Jean Sallot, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 18/254,966
Filed by SAFRAN, Paris (FR)
PCT Filed Dec. 2, 2021, PCT No. PCT/FR2021/052182
§ 371(c)(1), (2) Date May 30, 2023,
PCT Pub. No. WO2022/117964, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 2012625 (FR), filed on Dec. 3, 2020.
Prior Publication US 2024/0091850 A1, Mar. 21, 2024
Int. Cl. B22D 11/112 (2006.01); B22D 11/00 (2006.01); B22D 11/041 (2006.01); B22D 11/14 (2006.01); B22D 21/00 (2006.01); B22D 27/04 (2006.01); B22D 41/015 (2006.01); C22C 1/02 (2006.01); C22C 14/00 (2006.01)
CPC B22D 41/015 (2013.01) [B22D 11/001 (2013.01); B22D 11/041 (2013.01); B22D 11/112 (2013.01); B22D 11/141 (2013.01); B22D 21/005 (2013.01); B22D 27/04 (2013.01); C22C 1/02 (2013.01); C22C 14/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. 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.