本发明公开了一种原位纳米TiB晶须增强钛基复合材料的制备方法,属于钛基复合材料及增材制造技术领域。该方法包括：S1、选用纳米TiB2颗粒和微米TC4钛合金粉末,在手套箱中按比例称量上述两种粉末置于球磨罐中；S2、将混合粉末置于行星式球磨机上进行短时低能球磨以制备纳米TiB2颗粒均匀镶嵌于TC4钛合金粉末表面的复合粉末；S3、将复合粉末用于激光选区熔化(SLM)成形制备原位纳米TiB晶须增强钛基复合材料；S4、将SLM成形试样连同基板在真空烧结炉内进行去应力退火,再用线切割将试样从基板上切割下来。本发明制备的钛基复合材料晶粒细化明显,强度、硬度、耐磨性显著提高,在航空航天等领域有良好的应用前景。

The invention discloses a preparation method for in-situ nano-TiB whisker reinforced titanium matrix composite material, belonging to the technical field of titanium matrix composite material and additive manufacturing. The method includes: S1, nano-TiB2 particles and micron TC4 titanium alloy powder are selected, and the above two powders are weighed proportioning in a glove box and placed in a ball-milling tank; S2. The mixed powder was placed on a planetary ball mill for short-time low-energy ball milling to prepare composite powder with nano-TiB2 particles evenly embedded on the surface of TC4 titanium alloy powder; S3. The composite powder was used for laser selective melting (SLM) forming to prepare in-situ nano-TiB whisker reinforced titanium matrix composites. S4. The SLM forming sample and the substrate are annealed in vacuum sintering furnace for stress relief, and then the sample is cut off from the substrate by wire cutting. The titanium matrix composite material prepared by the invention has obvious grain refinement, and its strength, hardness and wear resistance are significantly improved. It has a good application prospect in aerospace and other fields.