Al含量对Ti-C-Al体系激光熔覆过程的影响

Effect of Al Content on Laser Cladding Process of Ti-C-Al System

通过LWY400P激光器,采用激光熔覆法在镁合金表面熔覆Ti-C-Al复合陶瓷涂层。原料中钛碳原子比为1：1,铝含量10wt%~40wt%。通过SEM、XRD分析了Al含量对熔覆过程的影响。结果表明,Ti-C-Al体系中Al含量对自蔓延温度、试样微观组织和性能有很大影响。Al的加入大大降低了体系的反应温度,30%的Al含量可使熔覆界面良好、组织致密。

Ti-C-Al composite ceramic coating was prepared by laser cladding on magnesium alloy surface using LWY400P laser. The ratio of titanium and carbon atom in material is 1：1. The aluminum content ranges from 10wt% to 40wt%. The influences of AI content on the laser cladding process were investigated using SEM and XRD. The results indicate that Al content in Ti-C-Al system has remarkable influences on the self-propagating temperature, microstructure and properties of the sample. The addition of Al greatly reduces the reaction temperature of the system. The addition of 30% Al content can make cladding interface better and structure dense.