A kind of sic fiber variable angle reinforced ti-matrix composite tube and shaft part and its preparation method

Abstract

The invention discloses a SiC fiber variable angle reinforced Ti base composite pipe shaft and a preparation method thereof, and belongs to the technical field of preparation of composites. A variable angle SiCf / Ti base composite middle layer is arranged in a Ti alloy pipe wall of the pipe shaft, and comprises more than three SiC fiber layers; and included angles between the axial direction of SiC fibers in the SiC fiber layers and the axial direction of the pipe shaft are within -90 to 90 degrees. The fiber reinforced angle o the pipe shaft realizes the variable angle adjustment; and the variable angle reinforcement mode effectively reduces the pipe shaft anisotropy degree, improves the warping rigidity, the transverse rigidity and the impact resistance of the composite pipe shaft, and facilitates to widen the application range of the SiCf / Ti base composite pipe shaft.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a SiC fiber variable-angle reinforced Ti-based composite material pipe shaft and a preparation method thereof. Background technique [0002] Ti-based composites reinforced with continuous SiC fibers (SiC f / Ti composites, TMCs) as the main representative of the application potential of metal matrix composites in aero-engines and other aviation and aerospace fields has clearly shown a rapid upward trend. Among the materials, Ti-based composite materials account for about 45%, and TMCs will be used in various parts. TMCs has high specific strength, high specific stiffness, good high temperature resistance, creep resistance and fatigue resistance, and is an ideal high temperature lightweight structural material. The developed aero-engine TMCs parts replace the original Ti alloy parts, and the weight reduction effect can reach 30% to 40%, and its fatigue life...

AI Technical Summary

Problems solved by technology

A few unpublished materials show that the 90° multi-layer winding of the precursor filament can be completed by a numerical control winding machine, and then a simple shaft of SiC fiber-reinforced Ti-based composite can be prepared. However, the fiber reinforcement angle of this component is perpendicular to the axial direction of the component. , its anti-shear and anti-torsion properties are extremely poor, so it has little practical significance

If a precision winding machine is used to directly wind monofilaments with variable angles of -90° to 90°, it is theoretically impossible to achieve the densification of the entire layer of precursor filaments. In addition, the continuous tape-making process of multi-strand precursor filaments has not yet achieved a breakthrough.

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