Foundry process with hot mold casting
AssigneeSafran Aircraft Engines
InventorsSerge Alain Fargeas, Serge Tenne, Dominique Coyez
Life of this patent
Estimating the term…
Abstract
The invention relates to the foundry field, and in particular to a foundry process comprising the preheating of a mold (1) up to a first temperature, the casting of a metal in the liquid state, at a second temperature above the first temperature, in the mold kept in a main furnace (100) at the first temperature since the preheating, the difference between the first temperature and second temperature being no more than 80° C., the cooling and solidification of the metal in the mold (1) kept in the main furnace (100) at a pressure of less than 0.1 Pa at least since the casting, the removal of the mold (1) from the main furnace (100), and the demolding of the solidified metal.
Claims8
A foundry process comprising the following steps:
- preheating of a mold in a main furnace to a first temperature, wherein the mold is a shell mold which extends downwards from a casting cup to a base, and a lower part of the mold around a mold cavity has a wall thickness less than a wall thickness of an upper part of the mold around the mold cavity;
- casting of a metal in the liquid state, at a second temperature higher than the first temperature, in the mold held in the main furnace at the first temperature since preheating, the difference between the first and second temperatures being not more than 170° C.;
- cooling and solidification of the metal in the mold held in the main furnace at a pressure below 0.1 Pa at least since casting, wherein the metal solidifies into equiaxed grains;
- extraction of the mold from the main furnace;
- and
- demolding of the solidified metal.
Dependencies are inferred from the claim text.