Patent ID: 9731350
Date: 2017-08-15
CPC Classifications: B22C,B22D

Claim:
1. A foundry method of casting monocrystalline metal parts, the method comprising: casting a molten alloy into a cavity of a mold through at least one casting channel in the mold, wherein the cavity is shaped for molding a final metal part; subjecting the alloy to heat treatment; and removing the mold; wherein the heat treatment is performed after the alloy has solidified in the mold and before an end of mold removal, wherein the casting channel includes at least one transition zone adjacent to the cavity, and presents, in the transition zone, relative to an upstream section of the casting channel in a flow direction of the molten alloy, a cross-section that is enlarged in a direction of a main axis of a section of the cavity in a plane that is perpendicular to the casting channel, wherein, after the casting, the transition zone forms, adjacent to the final metal part formed by the cavity, an enlarged section, a central rod formed by the casting channel upstream from the enlarged section, and at least one metal web connected to the central rod and the enlarged section, the at least one metal web being thinner than the central rod, wherein the metal part is a turbine engine blade, and wherein the enlarged section is adjacent to a blade tip of the turbine blade.