为了探究激光清洗工艺对铝合金轮胎模具表面性能的影响, 采用平均功率500 W的全固态激光器作为清洗光源, 在激光峰值功率密度约为5.3 J/cm2时, 研究激光清洗前后铝合金轮胎模具表面宏观形貌、微观形貌、疏水性、表面元素含量及残余应力的变化。结果表明, 激光清洗后表面粗糙度达到Ra0.2相比未清洗表面降低83.3％; 激光清洗后提高模具表面疏水性, 水接触角可达116.6°, 表面能低至12.9 mN/m; 经过激光清洗后表面碳元素含量下降, 由清洗前23.91%降为4.07%; 激光清洗使模具表面应力状态由压应力变为拉应力。此结果为激光清洗在铝合金轮胎模具清洗的实际应用提供了参考。

In order to investigate the effect of laser cleaning process on the surface properties of aluminum alloy tire molds, an all-solid-state laser with an average power of 500 W was used as the cleaning light source. When the laser peak power density was about 5.3 J/cm2, the macroscopic surface, Morphology, micromorphology, hydrophobicity, surface element content and residual stress. of the aluminum alloy tire mold after laser cleaning was studied. The results show that after laser cleaning, the surface roughness reaches Ra0.2, which is 83.3% lower than that of the uncleaned surface. After the laser cleaning, the surface of the mold is hydrophobic, the water contact angle can reach 116.6°, and the surface energy is as low as 12.9 mN/m. After cleaning, the carbon content on the surface decreased from 23.91% to 4.07% before cleaning; the laser cleaning changed the surface stress state of the mold from compressive stress to tensile stress. This result provides a reference for the practical application of laser cleaning in aluminum alloy tire mold cleaning.