摘要
将质量分数为为3%的纳米Cu与一定比例的Cr、Mn、Ti粉末与Fe基体粉末通过高能球磨机均匀混合,经过压制成形、烧结和渗碳处理过程,制成粉末冶金块体材料.用扫描电子显微镜和透射电子显微镜进行组织结构分析,并与传统20CrMnTi汽车齿轮制品进行性能的对比分析.结果表明:少量的纳米Cu在Fe基颗粒界面上通过扩散、熔解,促进了Fe基颗粒的有效连接和传质扩散,在Fe基颗粒界面形成Cu相;添加少量纳米Cu可以显著降低粉末冶金加工时的烧结温度,同时制成的20CrMnTi粉末冶金制品在性能上也更具有优势.
3.0 wt% nano-meter Cu powder was added into the mixed powders consisting of Cr,Mn and Ti powders and Fe-based powder and the mixture was milled to blend evenly on a high-energy milling machine and was pressure synthesized to shape and then sintered and carbonized in sequence.The microstructures of the powder metallurgically manufactured gears were observed by a scanning electron microscope and a transmission electron microscope;the properties of it are analyzed in comparison with a conventionally manufactured 20CrMnTi gear.The results show that the nano-meter Cu powder diffuses and melts on the Fe-based powder and a Cu phase formed on the Fe-based powder,that the nano-meter Cu powder lowers the sintering temperature of powder metallurgy,and that the obtained gear with a chemical composition equivalent to 20CrMnTi has better properties than the conventionally manufactured one.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2010年第5期10-13,共4页
Journal of Harbin University of Science and Technology
基金
吉林省科技厅课题(20090530)
关键词
粉末冶金
渗碳
齿轮
组织
性能
powder metallurgy P/M
carbonization
gear
microstructure
property
