US 5,544,805 AGranted

Method of producing a fibre-reinforced metallic circular part

AssigneeSociete National d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."

InventorsPhilippe L. A. Alassoeur, Andre C. F. Collot, Xavier J. M. A. Guyonnet, Gilles C. C. Klein, Ludovic E. C. Molliex

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Abstract

A method of producing a fibre-reinforced metallic circular part having a tral hollow, wherein the reinforcing fibres are disposed in the part in the vicinity of the hollow, comprises providing an annular metallic blank with a channel-sectioned groove opening towards the axis of the blank, placing uncompressed concentric layers of the reinforcing fibres and additional metal alternately in the groove followed by a more rigid expansion ring, evacuating the groove and sealing it by a deformable closure member which covers the groove, placing this assembly in an autoclave and subjecting it to a temperature and pressure sufficient to effect superplastic forging of the layers of additional metal whereby the fibre layers and the additional metal layers are compressed and welded to the blank in a single operation, and machining the resulting assembly to obtain the required shaped part.

Claims20

Dependent claims

A method of producing a fiber-reinforced metallic circular part having a central hollow and wherein the reinforcing fibers are arranged in said part in the vicinity of said hollow said method comprising the steps of:

a) providing an annular metallic blank having a geometric axis and containing a channel-sectioned circular groove opening towards said axis;
b) placing uncompressed concentric layers of said reinforcing fibers and additional metal in said groove, said fiber layers alternating with said additional metal layers;
c) covering said groove with a deformable closure member;
d) evacuating and hermetically sealing said groove;
e) placing the assembly consisting of said blank and said layers of fibers and additional metal sealed in said groove of said blank in an autoclave and subjecting the assembly therein to a temperature at least equal to the superplastic forging temperature of said additional metal layers and a pressure at least equal to the superplastic forging pressure of said additional metal layers such that said fiber layers and said additional metal layers are compressed together and welded to said blank by superplastic forging in a single operation;
and
f) machining the compressed and welded assembly resulting from step (e) to obtain the required part.

4 more elements

Dependencies are inferred from the claim text.