钻杆用铝基复合材料中SiC/Al界面润湿性研究进展

Research Progress on Wettability of SiC/Al Interface in Aluminum Matrix Composites for Drill Pipe

SiC增强铝基复合材料可显著提高铝合金耐磨性,可用于制备新型的高强耐磨轻质石油钻杆;但SiC/Al界面润湿性差,致使在真空熔炼时SiC颗粒加入困难,且在铸锭中分布不均,从而无法获得组织、性能均匀的优质钻杆。在概述SiC/Al界面润湿行为及界面反应的基础上,系统介绍了SiC高温氧化、SiC化学镀镍和基体合金化等3种常用的改性方法,及其对SiC/Al界面润湿性的作用机理。综合比较后指出,采用SiC化学镀镍法可有效改善SiC/Al的界面润湿性,且在界面生成的中间化合物稳定,在制备石油钻杆用铝基复合材料时可优先考虑使用。

SiC reinforced aluminum matrix composites can significantly improve the wear resistance of aluminum alloy, which can he used for the preparation of new high strength, wear-resistant, light oil drill pipe. However, the wettability of the SiC/AI interface is poor, resulting in the difficulty of adding SiC particles and uneven distribution in the ingot during vacuum melting, thus failing to obtain a high quality drill pipe with microstructure and performance uniform. Based on the review of the wetting behavior and interface reaction of SiC/A1 interface, SiC high temperature oxidation, metal-coated SiC and matrix alloying these three modification methods and effect of modification process on wettability of SiC/A1 interfaceare are introduced. After the comprehensive comparison, it is pointed out that the electroless nickel plating of SiC can improve the interracial wettability of SiC/A1 effectively, and the interracial product is stable, it can be given priority in the preparation of aluminum matrix composites for drill pipe.