Preparation method of nano-reinforced titanium-based composite material based on high-energy low-speed forming combined with high-energy high-speed remelting process

The invention discloses a preparation method of a nano-reinforced titanium-based composite material based on combination of high-energy low-speed forming and a high-energy high-speed remelting process, a high-energy low-speed scanning process is adopted in a laser forming process, micron-sized ceramic particles in a titanium matrix can be completely melted, and precipitated ceramic dendritic crystals have a growth tendency. And high-energy and high-speed remelting is carried out on the solidified titanium-based composite material, so that ceramic dendrites in a titanium matrix are refined, a nanophase is generated, uniform distribution and distribution density of the nanophase in the matrix are increased, the strengthening effect of a nano solid solution is exerted to the maximum extent, and the mechanical property of the material is improved. 本发明公开了一种基于高能低速成形结合高能高速重熔工艺的纳米增强钛基复合材料制备方法，激光成形过程中采用高能低速扫描工艺，可使钛基体中的微米级陶瓷颗粒完全熔化，析出的陶瓷枝晶有长大倾向。针对已凝固的钛基复合材料再进行高能高速重熔，促使钛基体中的陶瓷枝晶细化，生成纳米相，增大纳米相在基体中的均匀分布和分布密度，最大程度发挥纳米固溶体的强化