摘要
在含0.15%～0.45%C, 0.20%～0.50%Si, 0.60%～1.20%Mn和0.50%～1.50%Cu的Fe-C合金中加入硼和钛,原位合成了颗粒增强铁基复合材料.借助光学显微镜、扫描电镜和X衍射分析等手段,分析了颗粒增强相和基体组成;采用冲击试验机、材料试验机和磨损试验机等测试了复合材料的力学性能和耐磨性.研究发现,铁基复合材料的原位合成增强相是TiB2和Fe2B,且以TiB2为主.热处理后,铸态时呈条块状和针状的增强相变成团球状和颗粒状,使复合材料力学性能改善,耐磨性提高,并分析了原位合成颗粒增强相改善材料性能的原因.
By adding titanium and boron in the Fe-C melt whose compositions are 0. 15% -0. 45% C ,0. 2U% -0. 50% Si ,0.60% - 1.20% Mn and 0. 50% - 1.50% Cu,in-situ reinforced particulates/Fe composites were fabricated. The reinforced phase and matrix were studied with optical microscopy（OM） , scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The mechanical properties and abrasion resistance of composites were measured in impact testing machine, materials testing machine and wear testing machine. The results show that the in-situ reinforced particulates of composites are TiB2 and Fe2 B, and TiB2 is the most. After heat treatment in-situ reinforced particulates whose shapes are strip, block and needle at as-cast turn into nodular and granular, which improves the mechanical properties and abrasion resistance of composites. The reason that in-situ reinforced particulates improve the properties of composites was analyzed.
出处
《润滑与密封》
CAS
CSCD
北大核心
2007年第8期81-84,共4页
Lubrication Engineering
基金
中国博士后科学基金项目(2004036058)
关键词
复合材料
原位合成
力学性能
耐磨性
composites
in-situ reaction
mechanical property
wear resistance
