Laser preparation device and method for in-situ synthesis of tic-reinforced titanium matrix composites

Abstract

The invention relates to a laser preparation device and method for in-situ synthesis of TiC reinforced titanium-based composite materials, including a numerical control system, an atmosphere control system, a powder feeding and spreading system, a laser system and a forming room, wherein the lower end of the powder feeding and spreading system is provided with a layer of titanium Scraper for spherical alloy powder; this device combines selective laser melting and laser chemical vapor deposition technology, uses the high-energy and high-temperature characteristics of the laser beam to crack the carbon source gas, and the cracked product carbon reacts with the matrix titanium in situ to form a uniformly dispersed TiC reinforcement phase, which is combined with The matrix titanium in the melting-solidification process is compounded, and the TiC-reinforced titanium-based composite material is finally prepared by SLM layer by layer. The interface between the in-situ-generated TiC reinforcement phase and the matrix titanium is clean, which can effectively solve the problems of poor interfacial bonding strength and reinforcement phase agglomeration of existing composite materials. The structure of TiC reinforced titanium matrix composites generated in situ by gaseous carbon source diffusion-reaction is controllable, and the mechanical properties are significantly improved.

Description

technical field [0001] The invention belongs to the technical field of laser preparation for in-situ generation of TiC-reinforced titanium-based composite materials, and particularly relates to a laser preparation device and method for in-situ synthesis of TiC-reinforced titanium-based composite materials. Background technique [0002] TiC-reinforced titanium matrix composites have excellent physical and mechanical properties. Therefore, its preparation process and theoretical research have developed rapidly, such as powder metallurgy, stir casting, spray deposition, mechanical alloying, self-propagating high temperature synthesis, and liquid infiltration. The preparation method and preparation process of the composite material are very important, which will directly affect the structure and mechanical properties of the composite material. [0003] However, at present, most of the composite materials are prepared by adding a reinforcing phase to the original matrix material...

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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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