Femtosecond Laser Pulses for Drilling the Shaped Micro-Hole of Turbine Blades

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（4）
• 页码范围: 77-80
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/4/044202

摘要

The functioning of an aviation engine totally depends on the quality and shape of the film cooling micro-holes on the turbine blade.Film cooling microholes have a significant effect on the index of an aviation engine,which is crucial for the performance of the engine.Because of the distinct cooling effect of the shaped micro-holes of turbine blades on aviation engines,shaped holes are gaining more and more attention from aviation equipment suppliers.Currently,shaped holes are machined by electric spark and longer laser pulses.[1] These methods have caused several unexpected quality problems such as the formation of a recast layer,ripples and irregular hole shapes.In fact,femtosecond laser drilling is true cold ablation working.