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Ultrashort pulsed laser drilling and surface structuring of microholes in stainless steels

机译:超短脉冲激光钻孔和不锈钢微孔的表面结构化

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摘要

Microholes for the production of gasoline direct injection nozzles were obtained by ultrashort pulsed laser machining in martensitic stainless steels. The inner surface analysis was carried out by a specifically conceived Scanning Probe Microscopy instrument and revealed the presence of periodic surface microstructures whose formation was studied as a function of process parameters (pulse energy, repetition rate, rotational speed, drilling strategy). Experiments demonstrated that geometrical features of the microstructures can be varied by a proper parameter selection and open the perspective for an optimized process enabling a reduction of coking accumulation during service life and a more effective atomization of the fuel jet.
机译:通过在马氏体不锈钢中进行超短脉冲激光加工,获得了用于生产汽油直喷喷嘴的微孔。内表面分析是通过专门构思的扫描探针显微镜仪器进行的,揭示了周期性表面微观结构的存在,研究了其形成与工艺参数(脉冲能量,重复频率,转速,钻孔策略)的关系。实验表明,可以通过适当的参数选择来改变微结构的几何特征,并为优化工艺打开视野,从而可以减少使用寿命期间的焦炭积聚,并使燃料喷射更有效地雾化。

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