(北京科技大学新金属材料国家重点实验室，北京 100083)
摘 要: 研究了喷射沉积成形Al-Pb合金的显微组织及耐磨性能，并与铸态Al-Pb合金进行了对比。同时还研究了喷射沉积成形Al-Al(Pb)复合板的组织及回复再结晶行为。研究表明：喷射沉积成形Al-Pb合金，显微组织为均匀细小的等轴α基体上弥散分布着均匀细小的Pb 颗粒。与铸态Al-Pb合金相比，喷射沉积成形Al-Pb合金具有更细的晶粒度和更好的耐磨性能。弥散均匀分布的细小Pb颗粒对提高合金的耐磨性能具有很大的帮助。喷射沉积成形Al-Al(Pb)复合板经20%轧制后其回复再结晶温度明显高于普通的Al合金。
关键字: 喷射成形(SF) Al-Pb合金 显微组织 耐磨性能 回复再结晶
（University of Science and Technology Beijing, Beijing 100083, P. R. China）
Abstract:Microstructures and wear resistance of spray formed Al-Pb alloys were studied and compared with those of conventional cast Al-Pb alloy. The microstructure, recovery and recrystallization behavior of spray formed Al-Al(Pb) composite plates were also studied. The results showed that spray deposited billet exhibited microstructure of fine Pb particles homogeneously distributed on the fine equiaxial α matrix. Compared with conventional cast Al-Pb alloy, spray formed Al-Pb alloys have finer grain sizes and better wear resistance. The homogeneously distributed fine Pb particles have a great contribution to the improvement of the wear resistance of the alloys. The spray deposited Al-Al(Pb) composite plates with a "band" structure have much higher recrystallization temperature compared with those of conventional Al alloys after 20% rolling deformation.
Key words: spray forming (SF); Al-Pb alloy; microstructure; wear resistance; recovery and recrystallization
