| 摘要: |
| 采用水热合成法制得纳米WCu复合粉末，并在1 050 ℃经热压烧结制备出W20Cu复合材料。利用扫描电子显微镜(SEM)分析了W20Cu的组织形貌、磨损形貌及磨屑，并在室温下与7075铝合金配副进行磁场干摩擦磨损试验。结果表明： 水热合成热压烧结法制得的W20Cu复合材料的硬度达215 HB，电导率为45% IACS。不加磁场时，W20Cu复合材料销磨损面黏附较厚的高含Al层，磨屑呈螺旋状，磨损机制主要为粘着磨损；随着磁场强度的增加，黏附层变薄，销的磨损程度略微减弱而环的磨损加剧，摩擦副的摩擦因数有减小趋势，磨屑逐渐呈细小的碎片状及粒状，磨损机制主要为粘着磨损和轻微的氧化磨损。 |
| 关键词: W-20Cu复合材料； 磁场； 摩擦 磨损 |
| DOI：10.3969/j.issn.1007-9289.2014.03.013 |
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| 基金项目: |
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| Drysliding Tribological Characteristics of W-20Cu Composite Under Magnetic Field |
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WANG Fengmei, XIE Jingpei, LI Yan, WANG Aiqin, MA Douqin, LIU Shu
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School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan
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| Abstract: |
| W20Cu compacts made from powders by hydrothermal synthesis method were prepared at 1 050 ℃ by hot press sintering. Wear tests between W20Cu compacts and 7075Al in the magnetic field were carried out at room temperature. The microstructure of compacts, wear morphologies and wear debris were analyzed by scanning electron microscopy(SEM). Test results show that the hardness and conductivity of W20Cu composite are 215HB and 45%IACS, respectively. Under nonmagnetic field conditions, the worn surface of W20Cu composite is adhered by thick Al layers, wear debris are spiral, and the main wear mechanism is adhesive wear. With increasing magnetic field intensity, the adhesion layer getting thinner, the magnetic field can slightly reduce the wear loss of W20Cu compacts, however, aggravate the wear loss of 7075Al, and the friction coefficient of the friction pairs is reduced gradually. Wear debris are fragmented and get smaller gradually, and the main wear mechanism is adhesive wear and slightly oxidation wear. |
| Key words: W-20Cu composite magnetic field friction wear |
