Three-body abrasive wear behavior of CC/high-Cr WCI composite and its interfacial characteristics
Three-body abrasive wear behavior of CC/high-Cr WCI composite and its interfacial characteristics
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CC/高Cr WCI复合材料的三体磨粒磨损行为及其界面特性
DOI：
10.1016/j.wear.2009.09.001
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发表时间：
2010-02-04
期刊：
影响因子：
5
通讯作者：
Gao, Yimin
中科院分区：
文献类型：
--
作者：
Li, Yefei;Gao, Yimin
采用真空浸渗铸造工艺制备了硬质合金颗粒增强高铬白色铸铁。采用光学显微镜、X射线能谱仪（EDS）和X射线衍射仪（XRD）分析了CC颗粒与铁基体之间的界面结构。由于CC颗粒的部分溶解和W、C、Cr和Fe等元素的扩散，形成了Fe（3）W（3）C和Co（3）W（3）C等化合物，保证了界面处的冶金结合。用三体磨料磨损试验机研究了复合材料的磨损行为。磨损试验分为4个周期（每个周期30 min），随着周期的增加，复合材料的磨损体积损失先减小，到第3周期时达到最小值，然后又增大。随着磨料粒度的增大，磨损量逐渐增大。CC/高Cr WCI复合材料的磨损体积损失远小于热处理后的高Cr WCI，但CC/高Cr WCI复合材料与WC/高Cr WCI复合材料的磨损体积损失无显著差异。(C)2009 Elsevier B. V.保留所有权利。
The high-Cr white cast iron (WCI) reinforced with cemented carbide (CC) particles was prepared by using the vacuum infiltration casting process. The interfacial structure between CC particle and the iron matrix was analyzed with optical microscope, energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Owing to partial dissolution of the CC particles and diffusion of elements such as W, C, Cr and Fe, compounds such as Fe(3)W(3)C and Co(3)W(3)C were formed, which ensured metallurgical bonding at the interface. The wear behavior of the composite was studied by three-body abrasive wear tester. The wear tests included four periods (each period of 30 min duration); with the increase of the periods, the wear volume loss of the composite decreased firstly until reached the minimum at the third period, and then it increased. Meanwhile, it increased gradually with increasing abrasive particle size in the tests. The wear volume loss of the CC/high-Cr WCI composite was much less than the heat-treated high-Cr WCI, but there was no significant difference in the wear volume loss between CC/high-Cr WCI composite and WC/high-Cr WCI composite. (C) 2009 Elsevier B.V. All rights reserved.