EP3402621A1 - Noyau réfractaire comprenant un corps principal et une coque - Google Patents
Noyau réfractaire comprenant un corps principal et une coqueInfo
- Publication number
- EP3402621A1 EP3402621A1 EP17706528.1A EP17706528A EP3402621A1 EP 3402621 A1 EP3402621 A1 EP 3402621A1 EP 17706528 A EP17706528 A EP 17706528A EP 3402621 A1 EP3402621 A1 EP 3402621A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shell
- core
- main body
- cavity
- refractory core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims description 57
- 239000000463 material Substances 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 6
- 238000005495 investment casting Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 description 37
- 239000002184 metal Substances 0.000 description 26
- 229910052751 metal Inorganic materials 0.000 description 26
- 238000001816 cooling Methods 0.000 description 20
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000008602 contraction Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910001092 metal group alloy Inorganic materials 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
- F01D5/186—Film cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/21—Manufacture essentially without removing material by casting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/202—Heat transfer, e.g. cooling by film cooling
Definitions
- Refractory core comprising a main body and a shell
- the present disclosure relates to the foundry type lost wax, and more particularly to a refractory core for the manufacture of a hollow turbine engine blade by lost-wax casting process.
- a turbomachine comprises a combustion chamber in which air and fuel are mixed before being burned.
- the gases from this combustion flow downstream of the combustion chamber and then feed a high pressure turbine and a low pressure turbine.
- Each turbine has one or more rows of stationary blades (called distributors) alternating with one or more rows of moving blades (called moving wheels), circumferentially spaced around the rotor of the turbine.
- These turbine blades are subjected to very high temperatures of the combustion gases, which reach values much higher than those which can bear without damage these blades which are in direct contact with these gases, which necessarily implies to ensure their cooling continuously by an integrated cooling circuit which, when it wishes to ensure efficient and precise cooling without significantly increasing the air flow and without penalizing the engine performance, has multiple cavities.
- the hollow vanes thus formed are manufactured by the so-called "lost wax” foundry process which requires the use of a model piece or core whose outer surface corresponds to the internal surface of the finished blade, as described in patent application FR2961552. filed in the name of the plaintiff.
- a ceramic refractory core is placed in a mold and then a metal or metal alloy is cast between the mold and the core to form a blade.
- the metal blade retracts more than the ceramic core, the ceramic core then exerting on the dawn stresses that induce stresses in the dawn.
- the induced stresses can cause recrystallizations which are unacceptable for the use of the blades.
- the aim of the invention is at least to remedy in part these disadvantages.
- the present disclosure relates to a refractory core for the manufacture of a hollow turbine engine blade according to the lost-wax foundry technique, comprising a main body and at least one shell connected to the main body and defining a cavity between the main body and the hull, the hull being configured to come into contact with the blade during manufacture.
- the term "refractory” refers to a material that is sufficiently heat-resistant to be suitable for the lost wax casting of a turbomachine blade.
- the refractory material constituting the core may be a ceramic material, for example a refractory material based on alumina (Al 2 O 3 ), silica (SiO 2 ) or zirconia (ZrO 2 ).
- the refractory core may also be made of refractory metal.
- the refractory core may comprise essentially at least one of the following elements: Si, Hf, Ta, B, W, Ti, Nb, Zr, Mo, V.
- the refractory core has an elastic mechanical behavior and fragile.
- the core extends in a longitudinal direction.
- the longitudinal direction of the core corresponds to the longitudinal direction of the dawn, which extends from the foot of the blade to the head of the dawn. Sections perpendicular to the longitudinal direction are called cross sections. Viewed in cross section, the cavity is closed, so that the metal of the blade can be cast around the core, so around the shell, without penetrating the cavity.
- the hull can be attached to the main body or made in one piece with the main body.
- the cavity formed by the shell and the main body is not a porosity but a macroscopic cavity.
- the average diameter of the cavity is of the order of a few tenths of a millimeter to a few millimeters.
- the shell Due to the cavity, the shell can collapse on itself when it is subjected to forces applied to the outside of the cavity, in particular to the forces caused by the contraction of the metal of the blade during its cooling .
- the rupture of the shell releases space allowing free withdrawal of the metal, which has the effect of reducing the residual stresses in the metal during cooling.
- the shell is also subjected to forces during the casting of the metal.
- these efforts are much lower than those exerted on the shell during the cooling of the metal.
- the skilled person can size the hull to resist the casting of the metal and breaks from a certain level of stress during the cooling of the metal.
- the shell defines a convex volume.
- a convex volume is a volume (respectively a surface) such that whatever are two points belonging to this volume (respectively to this surface), the line segment connecting these two points is entirely contained in the volume (respectively in the surface).
- the shell defines a convex surface.
- the main body is full.
- the term "full" means that the main body has no holes and is not porous. In these embodiments, the main body is dense and compact. Thus, despite the presence of the cavity, the refractory core as a whole retains sufficient flexural rigidity. In addition, the zones having cavities, that is to say the hulls, are reserved for areas of the dawn subject to strong cooling constraints.
- the main body is intended to come into contact with the blade, in particular in contact with parts of the blade where the stresses during cooling are lower than in the parts intended to come into contact with the blade.
- shell may be intended to come into contact with substantially flat portions of the blade. In these embodiments, the shell does not surround the main body in its entirety.
- the refractory core further comprises at least one first reinforcement disposed within the cavity, extending from one point of the shell to another point of the shell.
- the first reinforcement is distinct from the main body and the hull.
- the first reinforcement can extend over the entire height of the core or only over part of the height of the core.
- the first reinforcement can include one or several recesses.
- the first reinforcement can be flat or non-planar.
- the geometry of the first reinforcement can be calculated by those skilled in the art according to their general knowledge according to desired values for certain criteria such as breaking strength, yield strength, etc.
- the refractory core may comprise several first reinforcements.
- the refractory core further comprises at least one second reinforcement disposed within the cavity and extending from one point of the shell to a point of the first reinforcement.
- the first reinforcement and the second reinforcement form a reinforcing structure of the shell.
- the second reinforcement may have all or some of the previously mentioned features about the first reinforcement.
- the first and second reinforcements may be arranged so that their cross section is in the general shape of T.
- At least one of the reinforcements has an intermediate portion forming a preferential rupture zone.
- a preferential rupture zone makes it possible to control the breaking point of the reinforcements and thus to accurately dimension the breaking strength of the shell.
- the intermediate portion may belong to the first reinforcement and / or the second reinforcement.
- the intermediate portion forming a preferential rupture zone may be located at the intersection of the first reinforcement and the second reinforcement.
- the intermediate portion forming preferential rupture zone may take the form of a thinning of the reinforcement or reinforcements, or a notch in at least one of the reinforcements.
- one or each reinforcement in cross-section, has an aspect ratio of at least 2, preferably at least 2.5, more preferably at least 3, preferably still at least 3.5, more preferably at least 4. Further, it is preferable that the aspect ratio is at most 50, more preferably at most 40, more preferably at least more than 30, more preferably at most 20, more preferably at most 10.
- the aspect ratio is the ratio of the greatest length to the shortest length. It determines the strength of the reinforcement, in particular when it is subjected to compressive, tensile and / or flexural stresses.
- the cavity has the general shape of a tube, the cavity being plugged near the ends of the tube.
- the ends of the cavity are plugged into parts of the shell that are not intended to come into contact with the metal.
- the shell remains locally hollow in its parts intended to come into contact with the metal.
- the cavity can be plugged so that the metal can not penetrate inside the parts of the shell intended to come into contact with the metal.
- the ends of the cavity can be plugged during said additive manufacturing.
- the main body and the shell are one-piece.
- the main body and the shell are made of the same material and present between them a continuity of the material.
- the shell can be attached to the main body.
- the present disclosure also relates to a method of manufacturing a hollow turbine engine blade according to the lost-wax foundry technique using a refractory core as previously described.
- the refractory wax core prior to injecting the wax onto the refractory core, is manually coated.
- the preliminary coating forms a first layer of wax can directly wrap the kernel.
- the first layer of wax after cooling, forms a buffer layer to mitigate the forces actually acting on the refractory core.
- the core is resistant to the stresses generated by the contraction of the wax which is then injected onto the refractory core in greater amounts.
- FIG. 1 shows a schematic cross-sectional view of a blade cast around a refractory core according to a first embodiment
- Figure 2 shows a detail of Figure 1
- FIG. 3 represents a view similar to that of FIG. 2 when the metal of the blade exerts forces on the refractory core during the cooling which follows the solidification of the metal;
- FIG. 4 shows a schematic view of a detail of a refractory core according to a second embodiment.
- FIG. 1 shows a schematic cross-sectional view of a blade 10 cast around a refractory core 12 according to a first embodiment.
- the blade 10 is a turbine blade but the refractory core 12 could also be used to cast other types of blades.
- the refractory core 12 is made of ceramic and will therefore be referred to hereinafter as "ceramic core 12". More specifically, the refractory core 12 has the following composition (mass percentages): vitreous silica 58% to 69%, fine vitreous silica from 8% to 19%, zircon (ZrSiO 4 ) 20% and cristobalite 3%. However, as previously indicated, the refractory core 12 could also be composed of another material, typically of refractory metal or refractory metal alloy.
- the blade 10 is hollow in order to allow its cooling by an internal circulation of air.
- the ceramic core 12 makes it possible to form the internal cavities of the blade, the outer surface of the ceramic core 12 substantially corresponding to the inner surface of the blade 10.
- the ceramic core 12 comprises a main body 14 and a shell 16.
- the ceramic core 12 comprises a single shell 16 but it could include several.
- the main body 14 and the shell 16 will now be detailed with reference to Figure 2, which shows a detail of Figure 1.
- the shell 16 is connected to the main body 14.
- the shell 16 defines with the main body 14 a cavity 18.
- the cavity 18 is located between the main body 14 and the shell 16.
- the shell 16 forms a relatively thin envelope by relative to the main body 14.
- the shell 16 is configured to come into contact with the blade 10 during manufacture.
- the main body 14 is full.
- the presence of the shell 16 is advantageous in the regions of strong curvature of the cooling channels of the blade. Indeed, regions of high curvature have particularly high stress concentrations.
- the shell 16 defines a convex volume, or at least in cross section (that is to say in the plane of Figures 1 and 2), the shell 16 defines a convex surface.
- the ceramic core 12 comprises a first reinforcement 20 and a second reinforcement 22.
- the first reinforcement 20 is disposed inside the cavity 20.
- the first reinforcement 20 is here rectilinear, in cross section.
- the first reinforcement 20 extends from one point of the shell 16 to another point of the shell 16, thus passing through the cavity 18.
- the second reinforcement 22 is disposed inside the cavity 18.
- the second reinforcement 22 is here rectilinear, in cross section.
- the second reinforcement 20 extends from a point of the shell 16 to a point of the first reinforcement 20.
- the first reinforcement 20 and the second reinforcement 22 have a generally T-shaped cross-section.
- the first reinforcement 20 and the second reinforcement 22 extend here over the entire length (in the longitudinal direction, that is to say along an axis perpendicular to the plane of FIG. 2) of the ceramic core 12.
- the first reinforcement 20 has an aspect ratio L / a of about 6.6.
- the second reinforcement 22 has an aspect ratio of approximately 4. In any case, it is preferable that each reinforcement has an aspect ratio of between 2 and 50.
- the metal does not enter the cavity 18 during the casting of the blade 10, it is also preferable to plug the cavity 18.
- the cavity is plugged near its ends in the longitudinal direction, preferably in parts of the shell which are not intended to come into contact with the cooling metal.
- the clogged parts can be manufactured continuously with the shell and the main body, as well as with any reinforcements.
- the metal blade 10 retracts further than the ceramic core 12 and exerts on the ceramic core F efforts, shown schematically in Figure 3, directed towards the main body 14.
- the first and second reinforcements have at their intersection an intermediate portion 24 forming a preferential rupture zone.
- the intermediate portion 24 is sized to be the first breaking point under the effect of the forces due to the contraction of the blade 10.
- the character of preferential breaking zone of the intermediate portion 24 is here ensured by the intersection of the first and second reinforcements 20, 22 in a T-shape, the intermediate portion 24 being located at the intersection of the first and second reinforcements 20, 22.
- the intermediate portion 24 breaks, resulting in the weakening of the reinforcing structure formed by the reinforcements 20, 22 and the rupture of the shell 16.
- the ceramic core 12 no longer obstructs, at the location of the hull 16 now destroyed, the free withdrawal of the blade 10. Consequently, the residual stresses in the blade 10 are greatly reduced and recrystallization phenomena can be avoided.
- the ceramic core 12 may be formed by additive manufacturing or by any other method suitable for producing the shell 16 and its possible reinforcements 20, 22.
- the lost wax manufacturing process of the blade 10 once the ceramic core 12 is made is conventional and first consists in forming an injection mold in which is placed the ceramic core 12 before injection of the wax. The wax model thus created is then dipped in slips consisting of ceramic suspension for making a casting mold (also called shell mold). Finally, the wax is removed and the shell mold is baked into which the molten metal can then be cast.
- the cooling of the wax blade pattern may give rise to forces similar to those which occur during cooling of the metal blade.
- the hull 16 must not break during this step.
- the skilled person can size the shell 16, for example by means of numerical simulations, so that it resists the forces exerted by the wax in cooling and that it breaks under the effect of the more intense forces exerted by the metal in cooling.
- the ceramic core 12 is wax coated manually. This step is called pre-waxing of the core.
- This preliminary coating can be done directly on the surface of the ceramic core 12.
- the coating can be made on the entire surface of the ceramic core 12, only on the shell 16 or on any part of the outer surface of the ceramic core 12.
- This Prior coating forms a buffer layer to attenuate the forces effectively acting on the ceramic core 12, thus protecting the shell 16 from breaking.
- the preliminary coating of wax can be removed from the core at the same time as the complete wax model.
- FIG 4 shows another embodiment of the ceramic core.
- the ceramic core 112 of Figure 4 is identical to the ceramic core 12 of the first embodiment except for the reinforcements and the detailed aspects thereafter. Thus, the main body 114, the shell 116 and the cavity 118 will not be described again.
- the ceramic core 112 comprises a first reinforcement 120 having a substantially V-shaped shape.
- the first reinforcement comprises an intermediate portion 124 forming a preferential rupture zone.
- the intermediate portion 124 takes the form of a notch in the first reinforcement.
- the intermediate portion 124 thus forms a stress concentration zone, which results in a preferential rupture zone.
- the ceramic core 112 is obtained by a method in which the main body 114 and the shell 116 are made separately, for example by ceramic injection, and then assembled, for example by gluing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1650332A FR3046736B1 (fr) | 2016-01-15 | 2016-01-15 | Noyau refractaire comprenant un corps principal et une coque |
PCT/FR2017/050082 WO2017121972A1 (fr) | 2016-01-15 | 2017-01-13 | Noyau réfractaire comprenant un corps principal et une coque |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3402621A1 true EP3402621A1 (fr) | 2018-11-21 |
EP3402621B1 EP3402621B1 (fr) | 2020-12-16 |
Family
ID=55953203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17706528.1A Active EP3402621B1 (fr) | 2016-01-15 | 2017-01-13 | Noyau réfractaire comprenant un corps principal et une coque |
Country Status (8)
Country | Link |
---|---|
US (1) | US10654098B2 (fr) |
EP (1) | EP3402621B1 (fr) |
CN (1) | CN108472715B (fr) |
BR (1) | BR112018014384B1 (fr) |
CA (1) | CA3011498C (fr) |
FR (1) | FR3046736B1 (fr) |
RU (1) | RU2721260C2 (fr) |
WO (1) | WO2017121972A1 (fr) |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5295530A (en) * | 1992-02-18 | 1994-03-22 | General Motors Corporation | Single-cast, high-temperature, thin wall structures and methods of making the same |
DE19821770C1 (de) * | 1998-05-14 | 1999-04-15 | Siemens Ag | Verfahren und Vorrichtung zur Herstellung eines metallischen Hohlkörpers |
EP1266706A1 (fr) * | 2001-06-13 | 2002-12-18 | Siemens Aktiengesellschaft | Dispositif de coulage, procédé de fabrication d'un dispositif de coulage et son usage |
US6929054B2 (en) * | 2003-12-19 | 2005-08-16 | United Technologies Corporation | Investment casting cores |
US7216694B2 (en) | 2004-01-23 | 2007-05-15 | United Technologies Corporation | Apparatus and method for reducing operating stress in a turbine blade and the like |
US6951239B1 (en) | 2004-04-15 | 2005-10-04 | United Technologies Corporation | Methods for manufacturing investment casting shells |
US7108045B2 (en) | 2004-09-09 | 2006-09-19 | United Technologies Corporation | Composite core for use in precision investment casting |
FR2878458B1 (fr) | 2004-11-26 | 2008-07-11 | Snecma Moteurs Sa | Procede de fabrication de noyaux ceramiques de fonderie pour aubes de turbomachines, outil pour la mise en oeuvre du procede |
US7306026B2 (en) | 2005-09-01 | 2007-12-11 | United Technologies Corporation | Cooled turbine airfoils and methods of manufacture |
FR2900850B1 (fr) | 2006-05-10 | 2009-02-06 | Snecma Sa | Procede de fabrication de noyaux ceramiques de fonderie pour aubes de turbomachine |
RU2337786C1 (ru) | 2007-04-25 | 2008-11-10 | Федеральное государственное унитарное предприятие "Московское машиностроительное производственное предприятие "САЛЮТ" (ФГУП "ММПП "САЛЮТ") | Способ изготовления керамических форм по удаляемым моделям |
FR2930188B1 (fr) * | 2008-04-18 | 2013-09-20 | Snecma | Procede pour ebavurer une piece en matiere ceramique. |
FR2961552B1 (fr) | 2010-06-21 | 2014-01-31 | Snecma | Aube de turbine a cavite de bord d'attaque refroidie par impact |
US10040115B2 (en) * | 2014-10-31 | 2018-08-07 | United Technologies Corporation | Additively manufactured casting articles for manufacturing gas turbine engine parts |
-
2016
- 2016-01-15 FR FR1650332A patent/FR3046736B1/fr not_active Expired - Fee Related
-
2017
- 2017-01-13 CN CN201780006887.7A patent/CN108472715B/zh active Active
- 2017-01-13 EP EP17706528.1A patent/EP3402621B1/fr active Active
- 2017-01-13 BR BR112018014384-7A patent/BR112018014384B1/pt active IP Right Grant
- 2017-01-13 CA CA3011498A patent/CA3011498C/fr active Active
- 2017-01-13 WO PCT/FR2017/050082 patent/WO2017121972A1/fr active Application Filing
- 2017-01-13 RU RU2018129571A patent/RU2721260C2/ru active
- 2017-01-13 US US16/069,593 patent/US10654098B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
BR112018014384A2 (pt) | 2018-12-11 |
EP3402621B1 (fr) | 2020-12-16 |
RU2018129571A3 (fr) | 2020-03-12 |
BR112018014384B1 (pt) | 2022-07-05 |
FR3046736B1 (fr) | 2021-04-23 |
WO2017121972A1 (fr) | 2017-07-20 |
RU2018129571A (ru) | 2020-02-18 |
CA3011498A1 (fr) | 2017-07-20 |
CN108472715B (zh) | 2021-01-29 |
US20190111470A1 (en) | 2019-04-18 |
CN108472715A (zh) | 2018-08-31 |
CA3011498C (fr) | 2023-05-23 |
RU2721260C2 (ru) | 2020-05-18 |
FR3046736A1 (fr) | 2017-07-21 |
US10654098B2 (en) | 2020-05-19 |
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