飞秒激光加工对熔覆层侧壁粗糙度的影响

发布时间：2018-04-14 07:06

本文选题：飞秒激光微加工 + 激光熔覆成型　；参考：《红外与激光工程》2015年11期

【摘要】：针对熔覆成型件表面粗糙的难题,提出了在成形过程中对熔覆层侧壁进行飞秒激光精密加工的方法,重点研究了精密加工过程中飞秒激光的能量密度、能量分布、光斑重叠率对熔覆层侧壁粗糙度的影响规律,结果表明:当焦平面处飞秒激光的能量为高斯分布,加工得到的熔覆层侧壁表面粗糙度Ra3μm时,激光能量密度介于0.12~0.34 J/cm~2之间;当能量为平顶分布并且加工后熔覆层侧壁表面粗糙度Ra3μm时,最佳能量密度范围为0.13~0.66 J/cm~2;同等参数条件下,平顶能量分布激光加工得到覆层侧壁粗糙度小于能量高斯分布时的粗糙度数值。熔覆层侧壁粗糙度随光斑重叠率的增加先减小后增大,实验获得的最佳重叠率范围为78%~85%。
[Abstract]:In order to solve the problem of rough surface of cladding parts, the method of femtosecond laser precision machining for the side wall of cladding layer is put forward in this paper. The energy density and energy distribution of femtosecond laser in the process of precision machining are studied emphatically.The effect of spot overlap rate on the side wall roughness of the cladding layer is studied. The results show that the laser energy density is between 0.120.34 J/cm~2 and 0.120.34 J/cm~2 when the femtosecond laser energy is Gao Si distributed at focal plane and the surface roughness of the cladding is Ra3 渭 m.When the energy distribution is flat-top and the surface roughness of the cladding is Ra3 渭 m, the optimum energy density is 0.13 ~ 0.66 J / cm ~ (-2).The roughness of the lateral wall of the coating is smaller than that of the energy distribution of Gao Si by laser processing of the flat top energy distribution.The roughness of the side wall of the cladding layer decreases first and then increases with the increase of the overlap rate of light spots, and the optimum overlap rate obtained by the experiment is 78% 85%.
【作者单位】：中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室;中国科学院大学;
【基金】：科技部国家重大科学仪器设备开发专项(2011YQ12007504)
【分类号】：TG665

【相似文献】