采用真空铸渗工艺制备了WC/Cr15钢基表面复合材料,研究了在预置层中添加16.7 vol%钨铁粉对复合层的界面组织和基体硬度的影响。运用OM、SEM、XRD和显微硬度计对复合层的界面组织和基体硬度进行了分析。结果表明,添加16.7vol%钨铁粉改善了复合层的界面组织及力学性能的连续性,有利于降低应力集中,改善应力分布状态;反应层中形成过渡均匀分布的Fe3W3C相,使WC颗粒与基体之间形成组织过渡;复合层基体中形成弥散分布的Fe3W3C相,提高了复合层的基体硬度,增强了复合层基体的耐磨性及其对WC颗粒的支撑与固定作用。
WC particles reinforced steel matrix composite coatings on Cr15 steel substrate was fabricated using vacuum infiltration-casting technique.Microstructure and hardness of the composite coatings by adding 16.7 vol% tungsten-iron powder into the preform layer were studied by means of optical microscopy,scanning electron microscopy with energy spectrometer,X-ray diffraction and micro-hardness test.The results show that the microstructure and mechanical properties of the interface of the coatings prepared with the preform layer added 16.7 vol% tungsten-iron powder are improved.Fe3W3C phase is observed in the coatings,which becomes the transition microstructure between the WC particle and the matrix.Uniformly distributed Fe3W3C phase in the matrix increases hardness and wear resistance of the coatings.
参考文献
| [1] | Liu DJ;Li LQ;Li FQ;Chen YB .WCp/Fe metal matrix composites produced by laser melt injection[J].Surface & Coatings Technology,2008(9):1771-1777. |
| [2] | 李祖来,蒋业华,叶小梅,周荣.WC在WC/灰铸铁复合材料基体中的溶解[J].复合材料学报,2007(02):13-17. |
| [3] | 张永忠,高士友,石力开.激光熔覆Ni60A+WC/12Co复合涂层的组织及性能[J].金属热处理,2002(09):10-13. |
| [4] | 蒋业华,李祖来,叶小梅,周荣,羊浩.碳化钨颗粒在WC/Fe基复合材料基体中的断裂和熔解[J].铸造,2007(05):491-494. |
| [5] | 宫文彪,杜辉,孙大千.WC颗粒增强Ni基合金涂层的组织与性能[J].金属热处理,2006(02):26-29. |
| [6] | 李言祥;吴爱萍.材料加工原理[M].北京:清华大学出版社,2005 |
| [7] | 尤显卿,马建国,宋雪峰,任昊,黄曼平.电冶熔铸WC/钢复合材料中WC的溶解行为[J].中国有色金属学报,2005(09):1363-1368. |
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