低压水射流激光复合切割Al2O3 陶瓷的研究

针对激光切割Al2O3 陶瓷存在热裂纹、大量熔渣等问题，提出了低压水射流激光复合切割陶瓷技术，并将这种工艺与普通激光切割进行了对比，结果表明低压水射流激光复合切割陶瓷可以大大减少陶瓷切缝的熔渣、避免热裂纹。主要研究了辅助气体压力、激光脉冲能量和激光重复频率对水射流激光复合切割Al2O3 陶瓷质量的影响规律，发现水射流存在时，辅助气体压力主要起到吹除切割头处水珠的作用，激光脉冲能量或激光重复频率增大、烧蚀材料增多，当烧蚀材料不能及时被射流冲除就形成了熔渣的累积，影响陶瓷切割质量。

Low-pressure water jet and laser composite cutting on Al2O3 ceramic

As the thermal cracks, a large amount of slag etc. exist with laser cutting on Al2O3 ceramic, a technology called low-pressure water jet and laser composite cutting on ceramics was introduced. Compared with ordinary laser cutting, the results show that low-pressure water jet and laser cutting is better, which can greatly reduce the slag and avoid thermal cracks. The influence rules of low-pressure water jet and laser composite cutting on ceramics the different auxiliary gas pressure, laser pulse energy and repeated frequency on were mainly discussed, and found out that under the water jet, the auxiliary gas pressure mainly played the role in blowing the drops away from the cutting head. When the laser pulse energy or the repeated frequency increased, the ablation of the material increased, but if the material cannot take away by the water jet, that would be accumulated to large amount of slag which will impact the quality of ceramic cutting.