High-temperature nickel-based alloy, which is a valuable crucial material for fabricating functional components, is commonly used to fabricate turbine blades. However, the concave surface of the turbine blade is much difficult to be polished. In this work, shear-thickening polishing (STP), which employed the shear-thickening mechanism of non-Newtonian power-law fluid, was utilized to achieve high efficiency and high-quality polishing of the concave surface of the high-temperature nickel-based alloy turbine blade. The finite element simulation of the pressure and velocity distribution on the concave surface during STP process was carried out by ANSYS, and the effects of different polishing angles, polishing velocities, pH values of polishing slurry and Fenton's reagent on the surface morphology and roughness of the workpiece were investigated by experiment. The comparison between simulation and experimental results indicated that the suitable polishing angle is 45°. The best surface can be obtained with a pH value of 6.5. With the increase of the polishing speed, polishing efficiency improved gradually. The workpiece surface was improved by adding 0.5% hydrogen peroxide (H₂O₂) and 0.15% FeSO₄ in the polishing slurry. In the final, surface roughness of the turbine blade was reduced rapidly from R_a = 72.3 nm to R_a = 4.2 nm after 9 min polishing under the appropriate conditions. The research results provide reference and basis for high-temperature nickel-based alloy turbine blade polishing.

高温镍基合金是制造功能组件的重要重要材料，通常用于制造涡轮机叶片。但是，涡轮叶片的凹面很难抛光。在这项工作中，利用非牛顿幂律流体的剪切增稠机理的剪切增稠抛光（STP）用于对高温镍合金的凹面进行高效和高质量的抛光。合金涡轮叶片。利用ANSYS软件对STP加工过程中凹面压力和速度分布进行了有限元模拟，得到了不同抛光角度，抛光速度，抛光液pH值和Fenton的影响。实验研究了该试剂对工件表面形貌和粗糙度的影响。仿真和实验结果比较表明，合适的抛光角度为45°。pH值为6.5可获得最佳表面。随着抛光速度的提高，抛光效率逐渐提高。加入0.5％的过氧化氢（H₂ O ₂）和0.15％FeSO ₄在抛光浆料中。最后， 在适当的条件下抛光9分钟后，涡轮叶片的表面粗糙度从R _a  = 72.3 nm快速降低到R _a = 4.2 nm。研究结果为高温镍基合金涡轮叶片的抛光提供了参考和依据。