摘要
利用Cu与Fe具有液相分离特性,以及母材与堆焊材料的冶金反应,采用聚焦光束堆焊制备了Fe3Si弥散分布的铜基合金复合堆焊层。采用X射线衍射、SEM、EDS及显微硬度分析等方法研究了堆焊层的物相组成和微观组织特征。实验结果表明,聚焦光束堆焊过程中,由母材熔化而进入熔池的Fe元素与熔池中的Cu合金呈液相分离状态,进入溶池的Fe由于密度小而上浮,上浮过程中与熔池中的Si反应生成Fe3Si。Fe3Si在堆焊层中弥散分布于α Cu基体中,分布密度由堆焊层表面向下呈减小趋势。
Based on liquid separation characteristic between Cu and Fe, and the reaction within base metal and the surfacing material, the copper matrix composite coating dispersed with Fe_3Si reinforcement was obtained by light beam surfacing. With X-ray diffraction, SEM, EDS and microhardness test, the microstructure and the phase of the surfacing layer were studied. The results show that liquid Fe coming from base metal separates from copper alloy in the molten pool, then floats up because of its lower density, and reacts with Si in the molten pool to form Fe_3Si. Fe_3Si reinforcement disperses in α-Cu matrix, and its content decreases from top to bottom in the surfacing layer.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2004年第3期450-454,共5页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(50275082)
