EP2504462A1 - Procédé de fabrication d'une pièce métallique composite à renforts internes en fibres, préforme de mise en oeuvre et pièce métallique obtenue - Google Patents
Procédé de fabrication d'une pièce métallique composite à renforts internes en fibres, préforme de mise en oeuvre et pièce métallique obtenueInfo
- Publication number
- EP2504462A1 EP2504462A1 EP10784770A EP10784770A EP2504462A1 EP 2504462 A1 EP2504462 A1 EP 2504462A1 EP 10784770 A EP10784770 A EP 10784770A EP 10784770 A EP10784770 A EP 10784770A EP 2504462 A1 EP2504462 A1 EP 2504462A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insert
- container
- cavity
- lid
- preform
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/20—Making alloys containing metallic or non-metallic fibres or filaments by subjecting to pressure and heat an assembly comprising at least one metal layer or sheet and one layer of fibres or filaments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49288—Connecting rod making
- Y10T29/4929—Connecting rod making including metallurgical bonding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49616—Structural member making
- Y10T29/49622—Vehicular structural member making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49801—Shaping fiber or fibered material
Definitions
- the invention relates to a method for manufacturing composite metal parts by incorporating internal reinforcements formed of fibers, in particular ceramic fibers, and also relates to the preform used during the implementation of the method as well as the composite metal part obtained.
- the invention relates to the field of metal matrix composite materials, abbreviated CMM.
- Ceramic fibers in particular SiC silicon carbide fibers, are in particular used for high-tech high-temperature applications that require the fields of aviation or aerospace or in the field of safety, for example for braking (ceramic brakes).
- a known method of manufacturing such parts with reinforcement comprises the formation of a coil of son coated around a mandrel.
- the coil is then incorporated into a metal container or main body in which a cavity has been pre-machined to form a housing for the insert.
- the depth of the cavity is greater than the height of the coil and is shaped to insert a cover pin.
- the lid is vacuum welded at the periphery of the cavity to ensure the seal during the hot isostatic compaction step, during which the cover is deformed and the winding is compressed by the tenon.
- the hot isostatic compaction technique consists of placing the part in a chamber where it is subjected to a high pressure, of the order of 1000 bar, and at a temperature which is also high, of the order of 1000.degree. hours.
- the inter-son voids coated creep disappear, the metal sheaths of the coated son are welded together and with the walls of the cavity, by diffusion bonding, to form a dense set composed of a metal alloy to within which the ceramic fibers extend. The resulting part is then machined to the desired shape.
- the method allows the manufacture of axisymmetric aeronautical parts, such as rotor discs or monobloc blade discs, but also non-axisymmetric, such as connecting rods, shafts, cylinder bodies, housings.
- axisymmetric aeronautical parts such as rotor discs or monobloc blade discs
- non-axisymmetric such as connecting rods, shafts, cylinder bodies, housings.
- the machining of the cavity in the main body is a difficult operation to achieve especially because of the small connection radii in the bottom of the cavity between the bottom surface and the side walls. This small radius of connection is necessary to allow housing, with a game as low as possible, the insert which has a rectangular section and which is formed of son of small rays. Machining the corresponding post in the cover is not easy either because of the non-opening angles and because it must have a shape perfectly complementary to the cavity.
- the machining of the main body of the container with its lid represents a significant fraction of the total cost of the parts.
- the applicant has developed a manufacturing process in which wherein the cavity houses a rectilinear insert and the lid whose dimensions are adjusted to allow positioning on this insert.
- the sealing of the cavity is then ensured by shrinking by reducing the dimensions of the cold cover, for example by diving in liquid nitrogen, and then expanding in the cavity so as to achieve a tight fit.
- the solution thus provides a seal that simplifies the shape of the cavity.
- This operation consists in subjecting the container - insert - lid assembly to a double cycle of temperature rise and pressure.
- the pressure is exerted by a gaseous fluid of compaction, generally argon.
- the invention proposes a pre-welding treatment of the lid on the container prior to the compaction phase.
- the subject of the present invention is a process for manufacturing composite metal parts by incorporating internal reinforcements formed of fibers, comprising the steps of machining in a metal body or container of at least one housing cavity for an insert of corresponding form comprising reinforcing fibers for introducing a lid on the insert into the cavity of the container, the lid having walls held in pressure against the walls of the facing container, the hot isostatic compaction cycle of the container assembly - insert - cover, and machining said assembly to obtain said part.
- This step of pressurizing the lid against the container is then continued by a pre-diffusion diffusion heat treatment consisting of a rise and a temperature maintenance of the container-insert-lid assembly solidarisant the lid and the container.
- the isostatic compaction is optimized and no longer requires external closure of the container by the lid with a specific weld, which leads to a reduction in costs, while ensuring quality compaction due to the absence of gas leakage in the insert by internal presoldering.
- the pre-treatment is integrated in the hot isostatic compaction cycle in which a first thermal phase only is followed by an external hot pressurization phase.
- This shrinking is implemented by cooling the lid to contract its dimensions before introduction into the cavity and then its expansion by return to ambient temperature, and / or by heating the container during this rise in temperature to increase the dimensions of its cavity by dilation before introduction of the lid;
- the cooling is carried out by thermal quenching in dry ice or a liquefied gas, in particular liquid nitrogen.
- the subject of the invention is also a metal part preform assembled during the temperature rise phase of the process defined above.
- This preform comprises the metal body or container, the reinforcing fiber insert disposed in the cavity formed in the container, and the metal lid disposed on the insert in said cavity and secured to said container.
- the cavity comprises a first elongated main portion housing the insert and at least a second portion extending from the first, the cover comprising a central portion covering the insert and at least one extension of shape corresponding to the second part of the cavity; in order to partially wrap the insert on at least two different planes.
- the lid thus forms a metal block of simple geometry and easily achievable;
- the lid comprises a zone of progressive deformation between the main portion and at least one extension of the lid at the time of the compaction step;
- the insert and the cavity are rectilinear, so that the lid assembles accurately in the cavity with the container in the heat treatment phases to not let out the fibers;
- the insert is of cross section chosen between a polygonal conformation, in particular rectangular, oval and circular;
- the insert is formed of fibers assembled in bundles and coated with metal, in particular titanium, which facilitates diffusion welding during compaction;
- the preform has a plurality of elongated cavities incorporating inserts of corresponding shape, the cavities being arranged in rectilinear portions, parallel or otherwise.
- This arrangement makes it possible to achieve a multiple longitudinal internal reinforcement, without using an annular shaped insert stretched with straight branches which requires adjusting the machining of the cavity of the insert to the shape of the insert, delicate operation and expensive.
- This multiple reinforcement is obtained without sacrificing the strength of the part since the fibers work essentially in their longitudinal direction.
- FIGS. 2a and 2b perspective and transparency views of an assembly example for producing a metal part preform according to the invention
- the positioning terms of the "superior” or “inferior” type designate locations with respect to objects in the sense of universal gravity.
- the metal body shown or container 10 is for example intended to form a connecting rod of a landing gear.
- a cavity 12 has been machined in the container 10 from its upper face Fs. This cavity accommodates an insert 14 in its lower part and a cover 16 in its upper part, the cover covering the insert.
- the cover 16 is projecting, in the example shown in FIG. 1a, with respect to the upper face Fs of the container 10 for matters of material compensation as mentioned below in the isostatic compaction phase.
- the cavity 12, the insert 14 and the cover 16 are of complementary shape and machined in such a way as to have no clearance or minimal clearance between them, the lowest possible considering technological constraints.
- the lid 16 and the container 10 have walls 16a and 10a bearing against each other by pressurization.
- a hooping between the walls of the lid and the container facing is performed by prior cooling of the lid in liquid nitrogen.
- the lid then shrinks in size and is positioned in the cavity on the insert.
- the lid expands in size and the walls of the lid and the container opposite then come into pressure against each other by a tight fit.
- the metal is a titanium alloy and the temperature of Welding is between 850 and 1000 ° C.
- the temperature keeping time for titanium alloys is at least 30 minutes.
- This pre-welding integrally or at least partially solidifies the container and the lid.
- the container and the lid are advantageously made of the same metal, a titanium alloy in the example.
- the pressure (arrows F) is exerted perpendicular to all the faces of the container 10, causing the collapse of the lid.
- the introduction of the gas under pressure and the temperature which may reach the order of 1000 bars and 1000 ° C., allow the metal of the matrix of the insert 14 to occupy the voids between the coated wires constituting the insert.
- the dimensions of the lid are previously calculated so that the upper face 16s of the lid 16 comes, during the pressurization, at the upper face Fs of the container 10, knowing that the volume of the insert decreases from about 15 to 20%.
- the container, lid and fibers are compacted, as indicated by the shrinkage volumes 18 and 19 appearing in hatched cross-section in FIG. 1c.
- FIGS. 2a and 2b concretely illustrate the assembly of the components in order to produce a preform 20.
- the components comprise the container 10 of elongate shape, having the cavity 12 also in elongated form, the insert 14 rectilinear and the lid 16 in the shape of a pad.
- the machined cavity 12 is rectilinear with a flat bottom and walls perpendicular to the bottom.
- the connecting surface between the bottom and the walls has a small radius of curvature to allow an adjustment of the insert 14 with a game as low as possible.
- the cavity comprises a central portion 12c and two annular end portions 12e and 12e ', in longitudinal extension on either side of the central portion.
- the central portion 12c is intended to serve as a housing for the rectilinear insert 14 by adjustment.
- the insert is formed of an assembly of ceramic fibers coated with metal, titanium in the embodiment.
- the shape of the cover 16 makes it possible to wrap the insert 14 once disposed in its housing.
- the cover 16 has an overall block shape and dimensions adjusted as close to those of the cavity 12, with a central portion 16c and end portions 16e and 16e 'in the longitudinal extensions of the central portion.
- the end portions allow the cover to wrap the insert on its upper face Fi and on its end faces Fe and Fe ', in three different planes.
- the height H of the end portions 16e and 16e 'of the cover corresponds to the height 16h of its central portion 16c increased by that of the insert 14, and is slightly greater than the depth of the cavity 12.
- the end portions 16e and 16e 'of the lid each have a cutaway 16p and 16p' providing a space with the bottom of the cavity on the side of the insert. These sections define free spaces that will facilitate the deformation of the lid during compaction.
- connection between the lid and the container to obtain the preform 20 is advantageously preceded by a hooping.
- the lid 12 is lowered suddenly in temperature to cause a shrinkage of its dimensions.
- a simple way is to immerse it in liquid nitrogen.
- the lid is then easily placed in the cavity after being cooled. As it expands, the lid comes in a snug fit against the side walls of the container.
- the isostatic compaction chamber (not shown) conventionally comprises heating control means in a wide range of temperatures, up to 1000 ° C and beyond, means for evacuation and means for putting under high pressure, up to 1000 bar and above.
- the temperature of the diffusion welding cycle is the conventional welding temperature of the metal constituting the container and the lid, here the titanium alloy.
- the heat treatment phases in particular pre-welding, are performed in the compaction plant. Pre-welding and compaction are thus chained continuously.
- the upper face Fc of the cover 16 collapses during compression up to 1000 bars to finalize the hot isostatic compaction of the preform 20.
- the insert is formed of a fiber bundle coated with a titanium alloy.
- the blank thus obtained is ready to be machined to produce the desired metal part.
- Pressurizing the lid on the container can be achieved by any means within the reach of the skilled person: by the introduction of an elastic blade, a mechanical spacer, etc.
- inserts have been compacted according to the method of the invention in each of the rectilinear portions 31 and 31 'of each of the non-parallel branches 33 and 33', before machining the recesses 34, 35, 35 'and 36.
- the inserts ensure the transmission of forces in tension and compression.
- the process of the invention makes it possible under these conditions to make any part incorporating one or more inserts in longitudinal parts of this part.
- the shapes of the lid can vary and wrap the insert partially or totally.
- several lids can envelop the insert, providing for example a through cavity, an insert being disposed in the middle of the cavity and two lids disposed on either side of the insert from the two opposite faces of the container.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0958350A FR2952944B1 (fr) | 2009-11-25 | 2009-11-25 | Procede de fabrication d'une piece metallique composite a renforts internes en fibres, preforme de mise en oeuvre et piece metallique obtenue |
| PCT/EP2010/068120 WO2011064251A1 (fr) | 2009-11-25 | 2010-11-24 | Procédé de fabrication d'une pièce métallique composite à renforts internes en fibres, préforme de mise en oeuvre et pièce métallique obtenue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2504462A1 true EP2504462A1 (fr) | 2012-10-03 |
| EP2504462B1 EP2504462B1 (fr) | 2018-07-11 |
Family
ID=42321095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10784770.9A Active EP2504462B1 (fr) | 2009-11-25 | 2010-11-24 | Procédé de fabrication d'une pièce métallique composite à renforts internes en fibres |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US8776343B2 (fr) |
| EP (1) | EP2504462B1 (fr) |
| JP (1) | JP5858925B2 (fr) |
| CN (1) | CN102770573B (fr) |
| BR (1) | BR112012011974A2 (fr) |
| CA (1) | CA2793463C (fr) |
| FR (1) | FR2952944B1 (fr) |
| RU (1) | RU2550053C2 (fr) |
| WO (1) | WO2011064251A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2925896B1 (fr) * | 2007-12-28 | 2010-02-05 | Messier Dowty Sa | Procede de fabrication d'une piece metallique renforcee de fibres ceramiques |
| FR2933422B1 (fr) * | 2008-07-04 | 2011-05-13 | Messier Dowty Sa | Procede de fabrication d'une piece metallique comportant des renforts internes formes de fibres ceramiques |
| EP2703622B1 (fr) * | 2012-08-31 | 2014-12-31 | Caterpillar Motoren GmbH & Co. KG | Tête de cylindre avec manchon de capteur |
| CN103131928B (zh) * | 2013-02-06 | 2015-04-08 | 西南交通大学 | 一种具有微纳米结构的超细晶多孔铁合金的制备方法 |
| GB2510894B (en) * | 2013-02-18 | 2015-01-14 | Messier Dowty Ltd | A method of manufacture of an aircraft landing gear component |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR854589A (fr) | 1939-01-06 | 1940-04-18 | Bombe incendiaire | |
| GB0324810D0 (en) * | 2003-10-24 | 2003-11-26 | Rolls Royce Plc | A method of manufacturing a fibre reinforced metal matrix composite article |
| FR2886181B1 (fr) * | 2005-05-27 | 2008-12-26 | Snecma Moteurs Sa | Procede de fabrication d'une piece tubulaire avec un insert en materiau composite a matrice metallique |
| FR2886290B1 (fr) | 2005-05-27 | 2007-07-13 | Snecma Moteurs Sa | Procede de fabrication d'une piece avec un insert en materiau composite a matrice metallique et fibres ceramiques |
| GB0515211D0 (en) * | 2005-07-23 | 2005-08-31 | Rolls Royce Plc | A method of making titanium components |
| FR2919284B1 (fr) * | 2007-07-26 | 2010-09-24 | Snecma | Piece mecanique comportant un insert en materiau composite. |
| FR2925896B1 (fr) * | 2007-12-28 | 2010-02-05 | Messier Dowty Sa | Procede de fabrication d'une piece metallique renforcee de fibres ceramiques |
| US7739794B2 (en) * | 2008-02-29 | 2010-06-22 | General Electric Company | Method for repair of rail wheels |
-
2009
- 2009-11-25 FR FR0958350A patent/FR2952944B1/fr active Active
-
2010
- 2010-11-24 RU RU2012126107/02A patent/RU2550053C2/ru active
- 2010-11-24 JP JP2012540416A patent/JP5858925B2/ja active Active
- 2010-11-24 CN CN201080053705.XA patent/CN102770573B/zh active Active
- 2010-11-24 BR BR112012011974A patent/BR112012011974A2/pt not_active IP Right Cessation
- 2010-11-24 CA CA2793463A patent/CA2793463C/fr active Active
- 2010-11-24 WO PCT/EP2010/068120 patent/WO2011064251A1/fr not_active Ceased
- 2010-11-24 US US13/509,022 patent/US8776343B2/en active Active
- 2010-11-24 EP EP10784770.9A patent/EP2504462B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011064251A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2952944A1 (fr) | 2011-05-27 |
| JP5858925B2 (ja) | 2016-02-10 |
| CN102770573A (zh) | 2012-11-07 |
| CN102770573B (zh) | 2015-07-22 |
| US8776343B2 (en) | 2014-07-15 |
| RU2012126107A (ru) | 2013-12-27 |
| JP2013512334A (ja) | 2013-04-11 |
| US20120255961A1 (en) | 2012-10-11 |
| BR112012011974A2 (pt) | 2017-10-10 |
| RU2550053C2 (ru) | 2015-05-10 |
| CA2793463C (fr) | 2017-05-16 |
| FR2952944B1 (fr) | 2014-05-02 |
| WO2011064251A1 (fr) | 2011-06-03 |
| EP2504462B1 (fr) | 2018-07-11 |
| CA2793463A1 (fr) | 2011-06-03 |
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