The Fe-Cr alloy steels containing low/medium carbon were developed for lining plate of ball mill working under wet grinding. Microstructure and mechanical properties have been evaluated. Additionally, the service behavior and mechanism of the alloy steels were analyzed by an impact corrosive-wear tester and scanning electron microscope. The results show that the hardness of alloy steel increased linearly with the increase of carbon content, while the impact toughness deteriorated. The low/medium Fe-Cr alloy steels in simulated copper slurry exhibited higher impact corrosive-wear resistance than high manganese steel. While the content of carbon was too high, poor brittleness and corrosion resistance resulted in the deterioration of comprehensive performance. The damage mechanism of this type of low/medium Fe-Cr alloy steel was the synergistic effect of impact, corrosion and wear.%针对矿山湿磨用球磨机衬板设计了一组中低碳合金钢.表征了其组织和基本力学性能,利用冲击腐蚀磨损试验机及扫描电镜对合金钢的服役行为及机理进行了探究.结果表明,合金钢的硬度随碳含量的增大而线性增大,冲击韧性恶化.在模拟铜矿浆中该类合金钢的耐冲击腐蚀磨损性能比高锰钢更优异.当碳含量过高,脆性及耐蚀性差使其综合服役性能恶化,冲击-腐蚀-磨损的综合作用是其服役损伤的主要原因.
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