论文部分内容阅读
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2mm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。
Aimed at the engineering loss caused by volumetric damage to the parts with distorted thin-walled structures, aiming at the laser remanufacturing of the compressor blade simulation with volumetric damage, the optimization of the process was selected by surface morphology comparison, dilution rate and aspect ratio analysis The parameters of cross-section geometry parameters and laser forming shape parameters are taken as indexes. The pre-forming process of ramps is used to quantitatively control the remanufacturing forming process. The microstructure and microstructure of the formed parts were investigated by means of metallographic observation and measurement. The experimental results show that the formed parts have no defects such as pores and cracks, the metallurgical bond between the cladding and the substrate is dense, The influence area is small, between 2 and 3 mm, the accuracy error of the width direction of the simulation part after forming is within 2mm, the forming accuracy error of the bevel bending part on both sides is within 3 °, and the main shape control parameters have higher precision .