Laser preparation device and method for in-situ synthesis of TiC-reinforced titanium-based composite material

Abstract

The invention relates to a laser preparation device and method for in-situ synthesis of a TiC-reinforced titanium-based composite material. The laser preparation device comprises a numerical control system, an atmosphere control system, a powder feeding and laying system, a laser system and a forming chamber. A scraper for laying titanium alloy spherical powder is arranged at the lower end of thepowder feeding and laying system; the device combines the selective laser melting and laser chemical vapor deposition technology for pyrolysis of carbon source gas by the high energy and high temperature characteristics of a laser beam, carbon of the pyrolysis product reacts with matrix titanium in situ to form a uniformly dispersed TiC-reinforced phase which is compounded with matrix titanium inthe melting-solidification process, and the TiC-reinforced titanium-based composite material is finally prepared by SLM layer-by-layer operation. The interface between the in-situ synthesized TiC-reinforced phase and the matrix titanium is clean, and the problems of poor interface bonding strength and reinforced-phase agglomeration of existing composite materials can be effectively solved. Throughgaseous carbon source diffusion-reaction, the in-situ synthesized TiC-reinforced titanium-based composite material is controllable in structure and the mechanical properties are significantly improved.

Description

technical field

[0001] The invention belongs to the technical field of laser preparation of in-situ TiC-reinforced titanium-based composite materials, and particularly relates to a laser preparation device and method for in-situ synthesized TiC-reinforced titanium-based composite materials. Background technique

[0002] TiC reinforced titanium matrix composites have excellent physical and mechanical properties. Therefore, its preparation technology and theoretical research have developed rapidly, such as: powder metallurgy, stirred casting, spray deposition, mechanical alloying, self-propagating high-temperature synthesis, and liquid infiltration. The preparation method and preparation process of composite materials are very important, which will directly affect the structure and mechanical properties of composite materials.

[0003] However, at present, most of the composite materials are prepared by adding a reinforcing phase to the original matrix material, or by introdu...

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