烧结温度对Fe-Al/Al复合材料显微结构和耐磨性的影响  

Effect of Sintering Temperature on Microstructures and Wear-resisting Properties of Fe-Al/Al In-situ Composites

作　　者：姜羡[1] 熊光耀[1] 赵龙志[1] 赵明娟[1] 焦宇[1] 

机构地区：[1]华东交通大学载运工具与装备省部共建教育部重点实验室,江西南昌330013

出　　处：《铸造技术》2014年第12期2942-2944,共3页Foundry Technology

基　　金：江西省科技支撑资助项目(20132BBE50006);江西省教育厅科学技术研究资助项目(GJJ12691);江西省载运工具与装备重点实验室资助项目(10JD05);南昌市科技计划资助项目(洪财企[2012]37)

摘　　要：采用粉末冶金液相烧结法制备了Fe-Al/Al原位复合材料,应用X射线衍射仪、扫描电镜、摩擦磨损试验机研究了烧结温度对Fe-Al/Al原位自生复合材料微观组织及耐磨性能的影响。结果表明:原位自生Fe3Al增强相的颗粒尺寸随着烧结温度的升高先减小后增大,硬度及耐磨性呈先上升后下降的趋势。当烧结温度为440℃时,短棒状Fe3Al增强颗粒数目最多,弥散分布在基体上。硬度达到63.3 HV,约为纯铝的2倍;磨损率达到0.73%,与纯铝相比降低了2.4倍,并且磨损形貌以磨粒磨损为主。The Fe-Al/Al in-suit composite was prepared by the method of powder metallurgy with transient liquid phase sintering, and the effect of sintering temperature on the microstructure and wear-resisting property of Fe-Al/Al in-situ composites was investigated by XRD, SEM and friction wear testing machine. The results show that the grain size of in-situ synthesized Fe3Al has a trend of falling first then rising, and the hardness and wear-resisting property have a trend of rising first then falling with the increase of sintering temperature. When the sintering temperature is 440 ℃, the particles number of the short-rod reinforced phases is maximum, and disperses in the matrix uniformly. The hardness reaches 63.3 HV, which is about two times that of pure aluminium. The wear rate reaches 0.73%, which decreases 2.4 times by comparing with pure aluminium. Moreover, the abrasive wear is believed to be mainly wear mechanism.

关 键 词：烧结温度 原位自生 微观组织 维氏硬度 耐磨性 

分 类 号：TB331[一般工业技术—材料科学与工程]