铸造碳化铬/锰白铜复合材料的研究

【作者】 张梦贤；

【导师】 张长军；

【作者基本信息】 长安大学 ， 材料学， 2005， 硕士

【摘要】 本文研究了铸态Cu-Ni-Mn合金与铸造碳化铬的界面特性,并在此基础上以不同尺寸(42～362μm)的铸造碳化铬颗粒为增强体,采用真空热压液相烧结技术制备了不同颗粒含量(0～45vol.%)的铸造碳化铬颗粒增强锰白铜基复合材料。通过二体磨料磨损实验,测试了在不同磨损条件下复合材料的磨损性能,并在此基础上对一新复合材料磨料磨损模型进行了验证。磨损试验结果表明,铸造碳化铬颗粒增强锰白铜基复合材料具有较高的抗磨料磨损能力,且其耐磨性随着铸造碳化铬颗粒体积分数和尺寸的增大而提高,表现出了强烈的“体积效应”及“尺寸效应”,尤其是在低载荷、细磨料磨损条件下,复合材料表现出更好的耐磨性,即使与高铬铸铁(Cr28)相比也有很大程度的提高。模型预测的磨损数据与试验数据基本吻合。更多还原

【Abstract】 In this dissertation, the interface characteristic between Cu-Ni-Mn alloy and cast chromium carbide were studied, and on the basis of this study, composites of Cu-Ni-Mn alloy reinforced with different volume fraction (0~45%) and different size (42~362μm) of cast chromium carbide particles were made by vacuum hot-pressing liquid sintering technology. Pin on disk two body abrasion tests have been performed under different wear condition, and on the basis of this study, a new wear rate prediction model for composite materials was validated. The results show that the composites were more wear resistant than the matrix, contributing to the "volume effect" and "size effect" , the wear resistance increases with the particle content and size. The composite shows better wear resistance than high chromium cast iron material especially in low load and fine abrasive test condition. The data got from wear rate prediction modal goes well with the data got form the verification tests.更多还原