不同环境下激光抛光(FeCoNi)_(86)Al_(7)Ti_(7)高熵合金表面粗糙度分析

Surface Roughness Analysis of Laser Polishing(FeCoNi)_(86)Al_(7)Ti_(7)High Entropy Alloy under Different Environments

为研究不同环境下激光抛光对(Fe Co Ni)_(86)Al_(7)Ti_(7)高熵合金表面粗糙度的影响,通过调整激光功率、扫描速度等参量,分析激光抛光后的三维形貌与表面质量。结果表明,在空气中进行激光抛光,激光扫描速度分别控制为v=500 mm/s,v=750 mm/s,v=1000 mm/s的情况下,当激光功率P=24%时得到的样件表面粗糙度值最低;激光扫描速度分别控制为v=1250 mm/s,v=1500 mm/s的情况下,当激光功率P=40%时得到的样件表面粗糙度值最低;激光功率分别为P=20%,P=24%,P=28%的情况下,当激光扫描速度v=750 mm/s时得到的样件表面粗糙度值最低;激光功率分别为P=32%,P=36%,P=40%的情况下,当激光扫描速度v=1250 mm/s时得到的样件表面粗糙度值最低。激光功率为P=20%,激光扫描速度v=500 mm/s时,对比3种不同实验环境下的抛光效果发现,水下激光抛光表面粗糙度值最低,其次是水下超声波激光抛光,最后是空气中激光抛光。激光扫描速度v=500 mm/s时,随着激光功率的增加,水下激光抛光和水下超声波辅助激光抛光的表面粗糙度值先减小后增大。样件表面粗糙度值与激光功率或激光扫描速度紧密相关。水对激光抛光后材料表面质量的提升效果明显,超声振动也起到了一定的辅助作用。

The objective is to study the effect of laser polishing on the surface roughness of(FeCoNi)_(86)Al_(7)Ti_(7)high-entropy alloy under different environments,and to analyze the surface quality.The method controls other experimental factors unchanged through the single variable method,only changes a single variable,such as laser power,laser scanning speed,and experimental environment,and compares the surface quality of the laser polished sample with the surface roughness value as the evaluation index.Laser confocal microscopy was used to measure roughness,observe three-dimensional morphology,and analyze the surface quality after polishing.Results when the laser scanning speed of laser polishing in air were unchanged at v=500 mm/s,v=750 mm/s and v=1000 mm/s,the surface roughness value obtained by laser power P=24%was the lowest.When the laser scanning speed is controlled at v=1250 mm/s and v=1500 mm/s,the surface roughness value of the sample obtained by laser power P=40%is the lowest.The laser power was unchanged P=20%,P=24%and P=28%,respectively,and the roughness value obtained by the laser scanning speed v=750 mm/s was the lowest.When the laser power is P=32%,P=36%and P=40%,respectively,the laser scanning speed v=1250 mm/s and the surface roughness value is the lowest.When the laser power is P=20%and the laser scanning speed v=500 mm/s,the surface roughness value of underwater laser polishing is the lowest in three different experimental environments,followed by underwater ultrasonic laser polishing,and finally laser polishing in air.When the laser scanning speed is v=500 mm/s,with the increase of laser power,the roughness value of underwater laser polishing and underwater ultrasonic assisted laser throwing first decreases and then increases.The conclusion is that the surface roughness value of the sample is not proportional or linear to the laser power or laser scanning speed,but there is a certain range to achieve the best laser polishing quality.Water has a great influence on the surface quality of the material after laser polishing,and the effect is obvious.Ultrasound also plays a certain auxiliary effect.