激光熔覆镍基合金涂层组织结构研究  

Study on the Microstructure of Nickel Base Superalloy Coating Produced bv Laser-cladding

作　　者：高阳[1] 梁勇[2] 佟百运[2] 黄建宇[2] 师昌诸 

机构地区：[1]中国科学院国际材料物理中心 [2]中国科学院金属研究所

出　　处：《表面技术》1996年第1期6-8,12,共4页Surface Technology

摘　　要：采用扫描电镜、X射线衍射仪及高分辨透射电镜,研究了激光熔覆Ni、Cr、B、Si高温合金涂层的组织结构。结果表明,得到的熔覆层为细化的树枝晶,由γ基体相和γ′相与硼化物等的多元共晶组成。X射线分析测得平均点阵常数为3.572。界面与基材形成稀释度很低的冶金结合。同时分别给出γ基体相[013]晶带和硼化物[010]晶带的电子衍射谱,以及界面高分辨象。The microstructure of NiCrBSi superaslloy coating by laser cladding were studied by SEM, XRD and HREM method. The results shown that the cladding coating is being fined dendrites,which are composed of 7 matrix phas es and eutectic phases including γ' phase and bonded compound (NiB). X-ray diffraction analysis shows the aver age lattice parameter to be 3. 572(?). The cladding coating metallurgically connected to substrate with only a little dilution. Electron diffraction patterns are given respectively, which are grain zone [013] of γ matrix precipitates and grain zone [010] of borided compound, and HREM image of interface is showed.

关 键 词：激光熔覆 界面 合金 涂层 组织结构 镍合金 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG174.446[金属学及工艺—金属材料]