Safran Aircraft Engines

Snecma

Safran

Serge Alain Fargeas

Dominique Coyez

Marc Soisson

Valéry Piaton

Patrick Emilien Paul Emile Huchin

Sébastien Digard Brou De Cuissart

Nicolas Romain Benjamin Leriche

Anthony Texier

Karine Deschandol

Serge Tenne

Sebastien Digard Brou De Cuissart

Ngadia Taha Niane

Guillaume Martin

Saïd Boukerma

Christian Marty

Serge Dillenseger

Vincent Marc Herb

Didier Guerche

Gilles Martin

Arnaud Biramben

Patrice Ragot

Jean-Christophe Husson

Franck Truelle

Patrick Chevalier

Hervé Gras

Chantal Sylvette Langlois

Didier Maurice Marceau Guerche

Francois Casteilla

Chantal Sylvette Marie-Noël Langlois

Dominique Joseph Georges Coyez

Fabien Corpace

François Casteilla

A mould for use in manufacturing a single-crystal component by metal casting and epitaxial growth, includes a cavity in which the component is to be formed and a housing having an elliptical cross-section in which a single-crystal seed is disposed, the seed having an elliptical cross-section defined by a minor axis and by a major axis, the housing being in fluid communication with the cavity via an opening of circular cross-section through which molten metal is to flow, the single-crystal seed and the opening being centred on the same vertical axis, in which the minor axis and the major axis of the cross-section of the seed are oriented as a function of the secondary crystallographic orientations of the single-crystal forming the single-crystal seed.

Mould for manufacturing a component by pouring metal and epitaxial growth, and associated manufacturing method

A method for manufacturing a metal workpiece by casting a metal alloy in a mould, in which prior to the casting, a chart is determined providing a risk of appearance of recrystallised grains during the casting and/or solidification of the metal workpiece, depending on temperature and plastic deformation energy conditions undergone by the metal workpiece, the casting of the metal alloy in the mould being implemented under casting and solidification conditions determined using the chart in order for the temperature and plastic deformation energy conditions undergone by the metal workpiece to be less than a given threshold for the risk of appearance of recrystallised grains.

Method for manufacturing a metal workpiece limiting the appearance of recrystallized grains in said workpiece

A foundry mold includes at least one molding cavity and one pair of feeder arms. The molding cavity extends, along a horizontal axis, from a first end to a second end, and the first pair of feeder arms comprises a first feeder arm, oriented in a substantially vertical direction and connected to the first end of the first molding cavity, and a second feeder arm, substantially parallel to the first feeder arm and connected to the second end of the first molding cavity.

Foundry mold, method for manufacturing the mold and foundry method

The invention relates to the foundry field, and in particular to a foundry process comprising the preheating of a mold () 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 () at the first temperature since the preheating, the difference between the first temperature and second temperature being no more than 80&#xb0; C., the cooling and solidification of the metal in the mold () kept in the main furnace () at a pressure of less than 0.1 Pa at least since the casting, the removal of the mold () from the main furnace (), and the demolding of the solidified metal.

Foundry process with hot mold casting

A directional solidification cooling furnace for metal casting part comprises: a cylindrical internal enclosure having a vertical central axis and a mold support arranged in the internal enclosure; the internal enclosure comprising a casting zone and a cooling zone, the casting zone and the cooling zone being superposed one on the other; the casting and cooling zones being thermally insulated from each other when the mold support is arranged in the casting zone by means of a heat shield that is stationary and by means of a second heat shield that is carried by the mold support; the casting zone including at least a first heating device, and the cooling zone including a second heating device.

Directional solidification cooling furnace and cooling process using such a furnace

A method of fabricating a two-component blade for a gas turbine engine, the method including in succession: obtaining a blade profile made of ceramic material having a hole passing right through the blade profile in its length direction so as to form a longitudinal channel opening out into a top cavity; positioning and maintaining the blade profile in a mold so as to form a bottom cavity communicating with the channel of the blade profile; casting molten metal into the blade profile so as to fill the top and bottom cavities and the channel interconnecting them; and cooling the metal so that the shrinkage of the metal cooled in the top and bottom cavities leads to the ceramic of the blade profile being subjected to compression prestress.

Method for manufacturing a two-component blade for a gas turbine engine and blade obtained by such a method

The invention relates to a method for producing multiple metal turbine engine parts, comprising steps consisting in:

Method for producing a turbine engine part, and resulting mould and intermediate blank

Method for producing turbine engine parts, and resulting blank and mould

Method for producing turbine engine parts, and resulting mould and blank compromising stacked parts

The invention concerns a unit comprising a mold () adapted to receive a molten metal alloy and the said metal alloy poured therein. The alloy is TiAl. The mold is rotational and comprises receiving recesses () made of steel, metal alloy and/or ceramic, and, at the location of a plurality of section planes each passing through the mold and the poured metal alloy, the mold has a surface heat capacity less than that of the poured metal alloy.

Lined centrifugal mould with controlled thermal inertia

The invention relates to the field of monocrystalline casting, and more specifically to a mold () for monocrystalline casting, and also to fabricating and using the mold. In particular, the mold () presents a mold cavity () comprising a first volume (), a second volume () and a grain duct (). The second volume () is situated on the first volume (), being in communication therewith, and includes at least one horizontal projection relative to the first volume (). The grain duct () has a bottom end () connected to the first volume () and a top end () adjacent to said horizontal projection of the second volume (). The mold () also has a separator member () interposed between the second volume () of the mold cavity () and the top end () of the grain duct ().

Mould for monocrystalline casting

A field of casting, and more particularly to a shell mold, and also to methods of fabricating and using such a shell mold. This shell mold includes a central cylinder, a plurality of molding cavities arranged in an assembly around the central cylinder, and at least one heat shield that is substantially perpendicular to the main axis. The central cylinder extends along a main axis between a casting cup and a base. Each molding cavity is connected to the casting cup by at least one feed channel, and also, by a baffle-selector with a starter in the base. The at least one heat shield completely surrounds each molding cavity in a plane that is substantially perpendicular to the main axis.

Shell mould having a heat shield

A casting pattern for a lost-pattern casting, the pattern being in a shape of a turbine engine blade with a root and a body on either side of a platform that is substantially perpendicular to a main axis of the blade, and a method of producing a shell mold from the pattern, and a casting method using the shell mold. The blade body presents a pressure side, a suction side, a leading edge, and a trailing edge. The pattern also includes an expansion strip adjacent to the trailing edge, and a refractory core embedded in the pattern but presenting, both on the pressure side and on the suction side, a respective flush varnished surface between the trailing edge and the expansion strip. A web extends between the platform and the expansion strip and presents a free edge between them.

Casting pattern

The invention relates to the field of monocrystalline casting, and in particular to a mold () for monocristalline casting comprising at least a molding cavity (), a starter cavity () having at least a first volume () in the form of an upside-down funnel, and a distinct second volume () forming a plinth at the bottom of the first volume and projecting perceptibly relative to said first volume in at least one horizontal direction, a selector channel () connecting said starter cavity () to said molding cavity (), and a support rod () that is laterally offset relative to said selector channel, and that connects the second volume () of the starter cavity () to the molding cavity (). The invention also provides a casting method using such a mold ().

Monocrystalline casting mold

A process for manufacturing a single-crystal turbomachine nozzle guide vane including an airfoil between two platforms is disclosed. The process includes pouring molten metal into a shell mold followed by directional solidification from a single crystal provided by a single-crystal grain provider device placed in the mold and having a predetermined orientation coinciding with the vertical. The volumes of the mold forming the platforms are oriented in a plane parallel to the vertical direction of the single crystal. The single-crystal grain providing device emerges in a grain duct forming a connection between the device and the lower ends of the platforms. The grain duct is shaped to present two branches for feeding the platforms and a web-shaped volume extending between the feed branches, the platforms and a lower edge of the airfoil. The upper edge of the volume forming the airfoil is inclined to the horizontal direction.

Growing community of inventors

Moissy-Cramayel, France

Serge Alain Fargeas