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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Problems solved by technology

[0003] However, at present, most of the composite materials are prepared by adding a reinforcing phase to the original matrix material, or by introducing reactants and matrix in situ self-generated composite materials, mainly by ball milling, mechanical mixing, or by melt penetration, spreading, etc. To achieve the dispersion of the reinforcement phase and the matrix, the two are difficult to disperse uniformly

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