초록 ▼

The invention relates to a method for making a metal part that comprises a reinforcement (15) made of ceramic fibers. The method comprises the following steps: forming at least one annular-shaped insert (15) by assembling a bundle of metal-coated fibers; placing the insert into a hollow metal mold (

The invention relates to a method for making a metal part that comprises a reinforcement (15) made of ceramic fibers. The method comprises the following steps: forming at least one annular-shaped insert (15) by assembling a bundle of metal-coated fibers; placing the insert into a hollow metal mold (10) such that the insert is spaced between the walls (10a, 10b) of the mold; filling the mold with a metal powder; generating vacuum in the mold and closing the same; hot isostatic compressing the assembly at a temperature and under a pressure sufficient for binding the powder particles between them and for binding the insert fibers between them; removing the mold and optionally machining to the desired shape.

대표청구항 ▼

1. A process for manufacturing a metal part that includes at least one ceramic-fiber reinforcement, comprising: forming at least one insert, by assembling metal-coated ceramic fibers into a bundle;incorporating the insert into a hollow metal mold in such a way that the insert is spaced away from the

1. A process for manufacturing a metal part that includes at least one ceramic-fiber reinforcement, comprising: forming at least one insert, by assembling metal-coated ceramic fibers into a bundle;incorporating the insert into a hollow metal mold in such a way that the insert is spaced away from the walls of the mold;filling the mold with a metal powder;creating a vacuum in the mold and closing the mold;hot isostatic pressing of the assembly, at a temperature and a pressure that are sufficient to bond the metal powder particles and the metal-coated fibers of the insert; andremoving the mold and, where appropriate, machining to the desired shape. 2. The process as claimed in claim 1, the insert wherein is of annular shape. 3. The process as claimed in claim 1, wherein the insert has at least one straight portion. 4. The process as claimed in claim 1, wherein the insert is straight and has been formed from coated filaments subjected together to an insert hot isostatic pressing treatment. 5. The process as claimed in claim 1, wherein the insert is placed in the mold by means of a support. 6. The process as claimed in claim 5, wherein the support is the mandrel for winding the insert. 7. The process as claimed in claim 1, wherein at least two inserts are placed in the mold. 8. The process as claimed in claim 7, wherein the two inserts are superposed. 9. The process as claimed in claim 1, wherein projections are provided in the mold, the projections defining cavities in said metal part between zones reinforced by the metal-coated ceramic fibers. 10. The process as claimed in claim 1, wherein the insert is of an axisymmetric shape.