采用ＭＬＤ－１０型磨损试验机、扫描电镜和透射电镜等研究了冲击磨损条件下团球状共晶体奥－贝钢磨损表面组织的变化．结果表明：奥－贝钢的冲击磨损表层中存在非晶态组织和纳米级晶粒；磨损亚表层中存在大量位错马氏体和形变贝氏体组织；奥－贝钢从亚表层到磨损表面方向的硬度逐渐增加，具有梯度分布特征，能够有效抵抗磨料的冲击和凿削作用，同时磨损亚表层中的位错、形变马氏体和贝氏体组织具有很好的强韧性匹配，可抑制高冲击下微裂纹的形成，因此奥－贝钢的抗磨料磨损性能良好． MLD-10 wear tester, scanning electron microscopy and transmission electron microscopy were used to study the wear and tear microstructure changes of the spherical eutectic Al-bentonite under impact wear conditions. The results show that there are amorphous and nano-scale grains in the impact wear layer of austenitic-bainitic steels; a large amount of dislocation martensite and deformed bainite exist in the as-worn sub-surface layer; The surface direction of the hardness gradually increased, with a gradient distribution, can effectively resist the impact of abrasive and chisel role, while wearing subsurface dislocations, deformation of martensite and bainite tissue has good toughness match, but Inhibit the formation of micro-cracks under high impact, so Austrian - Bei steel anti-abrasive wear good performance.