Femtosecond Laser Pulses for Drilling the Shaped Micro-Hole of Turbine Blades
JIA Hai-Ni1**, YANG Xiao-Jun1, ZHAO Wei1, ZHAO Hua-Long1, DU Xu2, YANG Yong1
1Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119 2National Time Service Center, Chinese Academy of Sciences, Xi'an 710600
Abstract:We design a set of processing devices to drill the shaped holes of turbine blades by using a femtosecond laser which outputs 1064 nm 5 W pulses at 100 kHz, investigate the mechanism of the femtosecond laser interaction with metals, and demonstrate that ultrafast laser drilling has distinct strong points against electric spark and longer laser pulse processing. The advantages related to no recast layer, no thermal effect, no micro crack, high precision, and high processing efficiency are carried out.