钛合金表面激光熔覆纯铁涂层显微组织的研究  

MICROSTRUCTURE OF Fe POWDER ON LASER-CLADDED Ti6A14V ALLOY

作　　者：黄果[1] 苏钰[1] 段志宇[1] 李军[1] 

机构地区：[1]上海工程技术大学材料学院,上海201620

出　　处：《上海金属》2013年第2期22-26,共5页Shanghai Metals

基　　金：国家自然基金(NO.51002093);上海市教委重点学科项目(NO.J51402)

摘　　要：将纯Fe粉在Ti6Al4V合金表面进行激光熔覆。通过扫描电镜、X射线衍射、热力学计算和显微硬度测定,可以看出熔覆层中含有大量的树枝晶、块状组织和针状组织;TiO、Fe_2C、V_5Al_3C_(0.6),LAVES等相弥散分布在激光熔覆层中,提高了熔覆层的硬度。粗大的树枝晶使熔覆层相应部位的硬度偏低。Pure Fe powder was cladded on the Ti6Al4V alloy surface by laser cladding. The cladded layer containing a large number of dendrites, bulk and acicular structures could be demonstrated by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, thermodynamic calculations and Micro-hardness. The TiO, Fe2C, V5Al3C06 and LAVES phase dispersed in the laser eladded layer which could improve the hardness of the cladded layer. The coarse dendrites decreased the micro-hardness of the corresponding parts of the cladded layer.

关 键 词：TI6AL4V合金 激光熔覆 纯铁 硬度 

分 类 号：TG156.99[金属学及工艺—热处理]