目的 减少磨削镍基合金GH4169过程中砂轮磨损和堵塞现象，提高工件表面质量。方法 采用WA和SG砂轮磨削镍基合金GH4169，通过观察磨削前后砂轮表面微观形貌，研究两种砂轮表面材料粘附、堵塞以及磨粒破碎等主要磨损机制。从磨削力、工件表面形貌、磨削比能3个方面评价两种砂轮的磨削性能，并探究磨削参数对砂轮磨削力、工件表面形貌、磨削比能的影响规律。结果 在去除相同体积材料时，SG砂轮的磨削力较小，所消耗的能量较WA砂轮低21.5%，SG砂轮所加工工件表面的粗糙度明显低于WA砂轮所加工工件表面的粗糙度，两者表面粗糙度差值均在1 μm以上。SG砂轮表面材料粘附现象较轻，WA砂轮表面出现了大面积的材料粘附，造成了砂轮堵塞。结论 SG磨粒因内部致密的微小晶粒所决定的微破碎机制，使SG砂轮在磨削镍基合金GH4169过程中保持了锋利的磨削刃，减少了砂轮表面的材料粘附，同时也获得了良好的工件表面质量。另外，SG磨粒较WA磨粒具有更佳的力学性能，使其在去除相同体积材料时所消耗的能量更少。

The study aims to reduce the wear and blockage of grinding wheel in the process of grinding nickel-based alloy GH4169, and to improve the surface quality of workpiece. In this paper, WA and SG grinding wheels are used to grind nickel- based alloy GH4169. The main wear mechanisms of the two SG grinding wheels, such as adhesion, blockage and particle breakage, are studied by observing the surface morphology of the grinding wheel before and after grinding. The grinding performance of the two grinding wheels is evaluated from three aspects:grinding force, workpiece surface morphology and grinding specific energy, and the influence of grinding parameters on grinding force, workpiece surface morphology and grinding specific energy is explored. The grinding force of SG grinding wheel was smaller and the energy consumed is 21.5% lower than that of WA grinding wheel. The surface roughness of the workpiece processed by SG grinding wheel was significantly lower than that of WA grinding wheel, and the difference between the two is 1 μm or more. The material adhesion on the surface of SG grinding wheel is light, and there is a large area of material adhesion on the surface of WA grinding wheel, resulting in the blockage of the grinding wheel. The micro crushing mechanism of SG abrasive particles determined by its dense micro grains makes the SG grinding wheel maintain a sharp grinding edge in the process of grinding nickel base alloy GH4169, reduce the material adhesion on the surface of the grinding wheel, and obtain good workpiece surface quality at the same time. In addition, SG abrasive particles have better mechanical properties than WA abrasive particles, so that they consume less energy under the condition of removing the same volume of materials.