摘要
在生产条件下采用冲入铸造法制备了改性纳米SiC粉体强化灰铸铁材料。研究了不同SiC粉体含量灰铸铁的显微组织和力学性能,以及在油润滑条件下的耐磨性能。研究结果表明,经改性纳米SiC粉体强化处理后的灰铸铁组织明显细化,力学性能和耐磨性能明显提高。当纳米SiC粉体含量为0.1%时,强化材料的组织和性能最优,抗拉强度提高了22.7%,耐磨损性能提高了20%～78%,强化后灰铸铁耐磨损性能的提高是SiC硬质点和石墨润滑协同作用的结果。
The gray cast iron samples reinforced by surface modified SiC nano-powders were prepared under industrial conditions by foundry method. The mechanical properties and microstructure of samples with different content of SiC nano-powders were investigated, as well as the wear resistance under oil lubrication. Compared with the samples without SiC nano-powders, the reinforced gray cast iron was characterized with finer microstructure and markedly improved mechanical properties and wear resistance. With the prime contents of 0.1%, the tensile strength of reinforced material was improved by 22.7%, and the wear resistance was much better than that of original material. The improvement of wear resistance of reinforced materials was the result of SiC nano-powders addition together with self-lubrication effect of graphite.
出处
《铸造》
EI
CAS
CSCD
北大核心
2007年第1期68-70,共3页
Foundry
基金
辽宁省教育厅基金资助项目(项目编号:05L038)
辽宁省科技攻关项目
关键词
改性纳米SIC粉体
灰铸铁
微观组织
耐磨性能
surface modified SiC nano-powders
gray cast iron
microstructure
wear resistance
