为提高合金的力学性能,在温度950°C不同应变和应变速率条件下对SLM成形的Ti6Al4V合金试样进行精密锻造处理,使用光学显微镜和X射线衍射仪分析原试样和锻造处理试样在水平和竖直截面内显微组织的演化,并计算了每个截面的孔隙率。结果表明,大应变速率以及大变形量可以改善显微组织并降低孔隙率,进而提高材料的疲劳性能。精密锻造处理后的试样显微硬度小于SLM成形原件的显微硬度;同时,精密锻造处理试样在水平截面和竖直截面的显微硬度差小于SLM成形原件在两个截面的显微硬度差。这说明精密锻造工艺可以改善SLM成形零件的各向异性。 In order to improve the mechanical properties of the alloy, the SLM-formed Ti6Al4V alloy specimens were precision forged at 950 ° C with different strain and strain rates. The original and forged specimens were analyzed by optical microscopy and X-ray diffractometry The evolution of microstructure in horizontal and vertical sections was calculated and the porosity of each section was calculated. The results show that the large strain rate and large deformation can improve the microstructure and reduce the porosity, thereby increasing the fatigue properties of the material. The microhardness of the sample after precision forging is smaller than the microhardness of the original SLM. At the same time, the microhardness difference between the horizontal and vertical cross section of the precision forging is less than the microhardness difference. This shows that the precision forging process can improve the anisotropy of SLM formed parts.