气体爆燃喷涂铁铝涂层结构的变化  

Microstructure of Fe-Al Alloy Coating by Detonation Spraying

作　　者：辛钢[1] 高阳[1] 黑祖昆[1] 颜永根[2] 陆明和[2] 

机构地区：[1]大连海事大学金属材料工艺研究所,116026 [2]上海宝钢研究院

出　　处：《中国表面工程》2001年第1期24-26,30,共4页China Surface Engineering

摘　　要：采用不同的喷涂工艺参数，分别在45钢基体上制备了电弧喷涂铁铝涂层，采用电子 探针(EPMA) 、X射线衍射(XRD)、光学显微镜和显微硬度计等仪器研究了气体爆燃铁铝涂层 的表面形貌、显微硬度、涂层的成分和相结构，结果表明，喷涂工艺的改变明显影响喷涂层 的相组成，随着单位时间内提供给粉末能量的减少，得到黑白相间的片层状结构，黑色相是 Fe4Al13，白色相是FeAl；增加单位时间内提供给粉末的能量，可以得到均匀的微观组织， 成分为FeAl。Microstructure and phases of Fe-Al binary alloy coating sprayed on 1045 steel sheet by the detonation spraying with different process parameters were i nvestigated by metallography,electron probe and x-ray diffraction (XRD) methods. The results of analyses showed that the composition of the coating, which inclu ded Fe-Al,Fe4Al3and a few Al2O3 phases,wasdifferent from the pristine powder of Fe4Al13.The content of FeAl decreased with the rising of the proportion of oxyge n and acetylene and the decreasing of frequency of the gun firing .Micro-hardnes s tests indicated that it changed inhomogeneously with the variation of content of FeAl lamellar structure.

关 键 词：气体爆燃喷涂 铁铝涂层 微观结构 

分 类 号：TG456.6[金属学及工艺—焊接] O484.1[理学—固体物理]