测量了微锻造处理后激光熔覆沉积TC4试样的残余应力、等轴晶晶粒尺寸和表面粗糙度,并对沉积态、固溶时效态、微锻造-固溶时效态成形件的室温拉伸性能及各向异性进行了对比分析。结果表明:微锻造-固溶时效后,晶粒细化为等轴晶,晶粒大小为70~140 μm;微锻造处理后,成形件在水平方向的塑性显著提升,各方向的拉伸性能均超过锻件,且各向异性小于10%。

The residual stress, equiaxed crystal grain size and surface roughness of laser cladding deposition TC4 samples after micro forging treatment are tested, and room-temperature tensile properties and anisotropy of samples in deposition state, solution state and micro forging-solution aging state are analyzed. The results show that the columnar crystal grains transform into equiaxed grain with size variation from 70 μm to 140 μm after micro forging treatment. After micro forging treatment, the plasticity of the formed parts in horizontal direction is significantly improved, the tensile properties in all directions are higher than those of the forging parts, and the anisotropy of the formed parts is less than 10%.