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针对铜矿湿磨工况下球磨机衬板的失效行为进行了研究。采用光学显微镜(OM)、扫描电镜(SEM)、能谱仪(EDS)及显微硬度仪等分析了服役Cr合金钢衬板的组织形貌,结合电化学测试手段及拉伸、冲击试验,分析了其在该工况下的耐蚀性及力学性能,并讨论了在弱酸工况中的腐蚀磨损机理。结果表明,衬板材料在模拟铜矿浆中具有良好的耐蚀性,而服役工况下的动态冲击磨损会降低材料的耐蚀性能。切削犁沟、腐蚀坑和剥落坑是衬板损伤的主要形式,腐蚀磨损的交互作用是导致衬板失效的主要原因。
Aiming at the failure behavior of the ball mill liner under wet grinding condition of copper mine, The microstructure of service Cr alloy steel liner was analyzed by optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and microhardness tester. Combined with electrochemical test methods and tensile and impact tests, The corrosion resistance and mechanical properties under the conditions were analyzed. The corrosion and wear mechanism in weak acid condition was also discussed. The results show that the lining material has good corrosion resistance in the simulated copper slurry, while the dynamic impact wear under service conditions will reduce the corrosion resistance of the material. Cutting furrows, corrosion pits and peeling pits are the main forms of liner damage. The interaction of corrosion and wear is the main reason for the failure of the liner.