(1. 南京工业大学 材料科学与工程学院，南京 210009； 2. 南京工业大学 材料化学工程国家重点实验室，南京 210009)
摘 要: 研究Ti-Al和Ti-Al-Ce两种复合改性剂对高硼铁基耐磨合金组织和性能的影响。采用X射线衍射仪(XRD)、金相显微镜(OM)、扫描电子显微镜(SEM)、硬度测试仪和摩擦磨损试验机等分析合金的组织结构和性能，结果表明：Ti-Al和Ti-Al-Ce的添加都能很好地破坏共晶硼化物的连续网状结构，改善硼化物的形貌、尺寸和分布情况，其中Ce添加后改善效果更加明显。热处理后合金硬度出现小幅度的减小，但硬度都在60HRC以上，改性处理显著提高高硼铁基耐磨合金的冲击韧性和耐磨性能，冲击韧性最高可达15.2 J/cm2，并表现出很好的耐磨性能。
关键字: 高硼铁基耐磨合金；Fe-B合金；改性处理；冲击韧性；耐磨性
（1. School of Materials Science and Engineering, Nanjing Technology University, Nanjing 210009, China; 2. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Technology University, Nanjing 210009, China）
Abstract:The effects of Ti-Al and Ti-Al-Ce additions on the microstructures and properties of high boron iron-based wear-resistant alloys were studied. The microstructure and properties of these alloys were analyzed with X-ray diffractometry (XRD), optical microscopy (OM), scanning electron microscopy (SEM), hardness testing machine and friction-abrasion testing machine. The results show that the interconnected boride network is destroyed with Ti-Al and Ti-Al-Ce additions, the morphology and distribution of modified as-cast eutectic borides are refined. With the Ce addition, it shows more effective modification. After heat treatment, the hardness of alloys decreases slightly but over 60HRC. The impact toughness and the wear resistance of high boron iron-based wear-resistant alloys are increased by modification treatment, the impact toughness is up to 15.2 J/cm2 and it shows excellent wear resistance.
Key words: high boron iron-based wear-resistant alloy; Fe-B alloy; modification treatment; impact toughness; wear resistance
