(1. 南京工業(yè)大學 材料科學與工程學院，南京 210009； 2. 南京工業(yè)大學 材料化學工程國家重點實驗室，南京 210009)
摘 要: 研究Ti-Al和Ti-Al-Ce兩種復(fù)合改性劑對高硼鐵基耐磨合金組織和性能的影響。采用X射線衍射儀(XRD)、金相顯微鏡(OM)、掃描電子顯微鏡(SEM)、硬度測試儀和摩擦磨損試驗機等分析合金的組織結(jié)構(gòu)和性能，結(jié)果表明：Ti-Al和Ti-Al-Ce的添加都能很好地破壞共晶硼化物的連續(xù)網(wǎng)狀結(jié)構(gòu)，改善硼化物的形貌、尺寸和分布情況，其中Ce添加后改善效果更加明顯。熱處理后合金硬度出現(xiàn)小幅度的減小，但硬度都在60HRC以上，改性處理顯著提高高硼鐵基耐磨合金的沖擊韌性和耐磨性能，沖擊韌性最高可達15.2 J/cm2，并表現(xiàn)出很好的耐磨性能。
關(guān)鍵字: 高硼鐵基耐磨合金；Fe-B合金；改性處理；沖擊韌性；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
