针对扭曲薄壁结构类部件易发生体积损伤而造成工程损失的实际,以体积损伤压缩机叶片模拟件激光再制造成形为目标,通过表面形貌对比、稀释率及宽高比分析,选择优化工艺参数;以成形部位截面几何参量和激光成形形状参数为指标,采用斜坡预成形工艺,对再制造成形过程进行量化控制,实现异形曲面截面特征的体积损伤部位的激光再制造成形。采用金相显微观察和测量的试验方法,对成形部位缺陷及尺寸精度进行试验分析,试验结果表明: 成形部位无气孔、裂纹等缺陷,熔覆层与基体为致密的冶金结合,再制造成形部位热影响区较小,在2～3 mm之间,成形后模拟件宽度方向尺寸精度误差在2 mm之内,两侧斜面弯曲部分成形精度误差在3°以内,其主要形状控制参数均具有较高精度。

Aiming at the loss of engineering practice caused by the easy volume damage of the screwy thin-walled parts, the laser remanufacture forming of the compressor blade simulator with volume defects was taken for target, through contrasting the surface topography, the dilution and the aspect ratio, the optimized process parameters were chosen. Considering the geometrical parameters of the forming part section and the laser forming parameters as the indicators, the process of pre-forming for the slope was taken, the laser remanufacture forming course was quantitatively analysised, the laser remanufacture forming for the volume damage with the cross section characteristic of special-shaped curved surface was realized. The methods of metallographic structure analysis and micro-measurement were taken to analysis the defects and size precision of the forming part, the result shows, there is no blowhole and crack in the surface of the forming part, a strong metallurgical bonding is found between the cladding layer and the substrate, the heat-affected zone of the forming part is relatively small, which is about 2~3mm, the dimensional precision of the formed simulator in width direction can be controlled within 2mm, the angle precision of the formed bilateral bend slope is controlled within 3°, the main parameters for shape controlling are also in better precision.