Grinding behaviour and wear mechanism of self-fabricated rail grinding stones (GS) using zirconia alumina (ZA), white fused alumina (WA) and brown fused alumina (A) were investigated in detail. The results illustrated that the grinding efficiency grew from GS-ZA and GS-A to GS-WA, and the GS-ZA gave the best ground rail surface quality. GS-ZA primarily consumed as attrition wear, while abrasive pull-out and fracture were dominant for the GS-WA and GS-A, thus making a better self-sharpness. The splintering mechanism of ZA was intergranular and transgranular fracture, and the macro-fracture and micro-fracture were presented by WA and A, respectively. Based on the experimental results, some suggestions about regulating the grinding performance of different GS, such as improving the grinding load of GS-ZA, reducing grinding heat of GS-WA, and the abrasive/bond interface modification of GS-A, were finally proposed.

详细研究了使用氧化锆氧化铝（ZA），白色熔凝氧化铝（WA）和棕色熔凝氧化铝（A）制成的钢轨磨石（GS）的磨削行为和磨损机理。结果表明，磨削效率从GS-ZA和GS-A增长到GS-WA，并且GS-ZA具有最佳的磨削轨道表面质量。GS-ZA主要消耗为磨损，而GS-WA和GS-A的主要磨损是拉出和断裂，因此具有更好的自锐性。ZA的破裂机制为晶间和跨晶状断裂，WA和A分别代表宏观断裂和微观断裂。根据实验结果，对调节不同GS磨削性能提出了一些建议，如提高GS-ZA磨削负荷，降低GS-WA磨削热，