| 含稀土真空熔结镍基合金涂层的界面组织和分布特性 |
| |
| 引用本文： | 宣天鹏,闵丹,霍影. 含稀土真空熔结镍基合金涂层的界面组织和分布特性[J]. 焊接学报, 2005, 26(7): 19-22,26 |
| |
| 作者姓名： | 宣天鹏 闵丹 霍影 |
| |
| 作者单位： | 合肥工业大学,材料科学与工程学院,合肥,230009 |
| |
| 基金项目： | 安微省“十五”科技攻关项目(01012031) |
| |
| 摘 要： | 通过研究了真空熔结镍基合金涂层纵截面的微观组织、相结构、以及合金元素和显微硬度的分布特征，结果表明，稀土(Ce La)改善了Ni60涂层的组织，使针状相改变成了小球状相，加强了界面的冶金结合。Ni60 RE涂层还析出了新的第二相WC、Ni2B、NiB和Cr6，Nk2.5Si。稀土阻碍了涂层中Ni、Cr、Si等原子向母材的扩散和母材中Fe原子向涂层的扩散，提高了涂层中Ni、Cr、Si等元素的含量，降低了Fe的含量，减轻了碳钢母材中的Fe对合金涂层的“稀释”作用。稀土还明显地提高了合金涂层的显微硬度，两种Ni60合金涂层显微硬度的最大值都出现在距涂层表面的0．4mm处。
|
| 关 键 词： | Ni60自熔性合金 稀土元素 组织结构 显微硬度 涂层 |
| 文章编号： | 0253-360X(2005)07-19-05 |
| 收稿时间： | 2004-08-13 |
Interface structure and distribution characteristics of vacuum fusion sintered Ni-based alloy coating containing rare earth element |
| |
| XUAN Tian-peng,MIN Dan and HUO Ying. Interface structure and distribution characteristics of vacuum fusion sintered Ni-based alloy coating containing rare earth element[J]. Transactions of The China Welding Institution, 2005, 26(7): 19-22,26 |
| |
| Authors: | XUAN Tian-peng MIN Dan HUO Ying |
| |
| Affiliation: | Material Science and Engineering Institute, Hefei University of Technology, Hefei 230009, China,Material Science and Engineering Institute, Hefei University of Technology, Hefei 230009, China and Material Science and Engineering Institute, Hefei University of Technology, Hefei 230009, China |
| |
| Abstract: | The microstructure, phase structure, and distributing characteristics of alloy elements and microhardness of vertical section of vacuum fusion sintered Ni-based alloy coatings were studied in this paper. The results showed that rare earth elements (Ce+La) improved structure of Ni60 coating, needle-shaped phase transformed to small globular-shaped phase, and the metallurgical binding of interface between the steel matrix and coating was reinforced. New second phases WC, Ni2B, NiB and Cr6.5Ni2.5Si precipitated in Ni60+RE coating. Rare earth elements held back the diffusion of Ni, Cr and Si atoms from coating to steel matrix and Fe atom from steel matrix to coating, and alleviated dilution function of Fe atom from steel matrix to Ni-based alloy coating. Rare earth elements increased Ni, Cr, and Si contents, and decreased Fe content in the coating too. The microhardness of Ni-based coating could apparently be enhanced by introduction of rare earth elements, and microhardness values of two kinds of coating reached their maximum values at 0.4 mm near by coating surface. |
| |
| Keywords: | Ni60 self-fluxing alloy rare earth element structure microhardness |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《焊接学报》浏览原始摘要信息 |
|
点击此处可从《焊接学报》下载免费的PDF全文 |
|
