采用铝系合金2A14(LD10)作为母合金,利用原位合成法制备了TiC颗粒弥散强化铝基材料.显微组织观察表明,合金中的TiC颗粒呈等轴状,尺寸约为1～3μm.加入TiC颗粒后,合金铸态组织显著细化,室温抗拉强度和屈服强度得到一定程度提高,但塑性下降.150℃时,合金的拉伸性能变化随TiC加入量增加而变化的规律与室温相似.合金中TiC颗粒的引入大大提高了合金的耐磨性能.在油润滑条件下,TiC/2A14材料的耐磨损体积远远优于其母合金以及其他典型的金属耐磨材料,如耐磨黄铜、ZA30锌基合金和Al-30Si高硅铝合金.
TiC particulate reinforced 2A14 aluminum alloys were prepared, using the technique of in-situ synthesis reaction. Microstructure revealed that TiC particles in the alloys were equiaxed morphology with size of 1～3μm in diameter. Addition of TiC particles to 2A14 aluminum alloy caused significant refinement of as cast microstructure and increase of tensile strength, but decrease of ductility of the alloy. At the elevated temperature of 150℃, the variation of tensile properties with addition of TiC particles were similar with that in ambient temperature. The wear resistance of the alloy was remarkably improved when small amount TiC particles was introduced. Under the condition of oil lubrication, the wear resistance of TiC particulate reinforced 2A14 alloy was much higher than that of some typical wear resistant alloys, such as wear resistant brass, ZA30 zinc alloy and Al-30Si high silicon alloy.
参考文献
| [1] | 李伟,陈美玲,陈玉喜.铸造金属基颗粒增强复合材料的研究现状与展望[J].铸造,2002(04):205-208. |
| [2] | 程羽;郭成;贾玉玺 等.颗粒增强金属基复合材料挤压性能的研究[J].西安交通大学报,1997,31(07):105-109. |
| [3] | TJONG S C;MA Z Y .Microstructural and mechanical characteristics of in situ metal matrix composites[J].Materials Science and Engineering,2000,R29(3-4):49-113. |
| [4] | 严有为;魏伯康;林汉同 .反应铸造工艺及原位颗粒增强金属基复合材料[J].铸造,1997,46(11):1-3. |
| [5] | 马宗义;毕敬;吕毓雄 等.原位生成TiB2增强Al复合材料研究[J].金属学报,1992,28(09):419-422. |
| [6] | KERTI I .Production of TiC reinforced-aluminum composites with the addition of elemental carbon[J].Materials Letters,2005,59(29-30):3795-3800. |
| [7] | YANG Y Y;FANG H S;HUANG W G .A study on the wear resistance of the white layer[J].Triboogy International,1996,29(05):425-428. |
| [8] | Tong XC. .Fabrication of in situ TiC reinforced aluminum matrix composites Part I - Microstructural characterization[J].Journal of Materials Science,1998(22):5365-5374. |
| [9] | 费豪文;卢光熙;赵子伟.物理冶金学[M].上海:上海科学技术出版社,1986 |
| [10] | 哈宽富.金属力学性质的微观理论[M].北京:科学出版社,1983 |
| [11] | 束德林.金属力学性能[M].北京:机械工业出版社,1986 |
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