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以TiH2为造孔剂的球磨铁基含油材料孔隙表征及其摩擦学性能
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国家自然科学基金项目(51575151;51775158)


Pore Characterization and Friction and Wear Properties of IronBased Oil Impregnated Materials with TiH2 as Poremaking Agent Fabricated by Ball Milling
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    摘要:

    以Fe、C混合粉末为原料,TiH2粉末为造孔剂,通过高能球磨工艺使各粉末混合均匀,以普通粉末冶金工艺方法制备含油铁基轴承材料。用HDM-20端面摩擦磨损试验机在干摩擦工况下考察材料摩擦磨损性能,使用Image J图像分析软件对材料孔隙进行表征,用VK-S105三维轮廓扫描仪观察磨痕3D形貌,利用扫描电镜观察粉末微观形态及样品截面孔隙形态。实验结果表明:随着TiH2粉末含量增加,铁基烧结材料基体孔隙增多;球磨工艺下,基体表面孔隙大小均匀,孔隙连通性改善,材料含油率升高,摩擦学性能优良;当TiH2质量分数为2%时,材料摩擦因数较低,磨损量较少,摩擦因数波动较小,有较长时间的平稳运行过程。

    Abstract:

    Taking Fe and C mixed powders as raw materials and TiH2 powders as poreforming agents, the powders were mixed evenly by highenergy ballmilling process, and the oilbearing iron bearing materials were prepared by powder metallurgy process.HDM-20 end surface friction and wear testing machine was used to investigate the friction and wear performance of the ironbased oil impregnated materials under dry friction conditions. Image J analysis software was used to characterize the pores of the ironbased oil impregnated materials. VK-S105 3D contour scanner was used to observe the 3D morphology of wear marks. The results show that with the increase of TiH2 powder content, the matrix porosity of the iron base sintered materials is increased. Under the ballmilling process, the pore size of the matrix is uniform, the pore connectivity is improved, the oil content of the ironbased oil impregnated materials is increased, and the tribological properties are excellent. When the mass fraction of TiH2 is 2%,the ironbased oil impregnated materials have relatively low friction coefficient and less wear loss,small friction coefficient fluctuation and a long period of smooth operation.

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李蓉蓉,尹延国,张国涛,张开源,陈 奇.以TiH2为造孔剂的球磨铁基含油材料孔隙表征及其摩擦学性能[J].润滑与密封,2020,45(7):75-78.
LI Rongrong, YIN Yanguo, ZHANG Guotao, ZHANG Kaiyuan, CHEN Qi. Pore Characterization and Friction and Wear Properties of IronBased Oil Impregnated Materials with TiH2 as Poremaking Agent Fabricated by Ball Milling[J]. Lubrication Engineering,2020,45(7):75-78.

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  • 在线发布日期: 2020-10-15
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