Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating
文献类型：期刊论文
| 作者 | Wu XL(武晓雷) ; Chen GN(陈光南)
|
| 刊名 | Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 1999 |
| 卷号 | 270期号:2页码:183-189 |
| ISSN号 | 0921-5093 |
| 通讯作者 | Wu, XL (reprint author), Chinese Acad Sci, Inst Mech, Mat Res Ctr, Lab Nonlinear Mech Continuous Media, Beijing 100080, Peoples R China. |
| 中文摘要 | The laser-solidified microstructural and compositional characterization and phase evolution during tempering at 963 K were investigated using an analytical transmission electron microscope with energy dispersive X-ray analysis. The cladded alloy, a powder mixture of Fe, Cr, W, Ni, and C with a weight ratio of 10:5:1:1:1, was processed with a 3 kW continuous wave CO2 laser. The processing parameters were 16 mm/s beam scanning speed, 3 mm beam diameter. 2 kW laser power, and 0.3 g/s feed rate. The coating was metallurgically bonded to the substrate, with a maximum thickness of 730 mu m, a microhardness of about 860 Hv and a volumetric dilution ratio of about 6%. Microanalyses revealed that the cladded coating possessed the hypoeutectic microstructure comprising the primary dendritic gamma-austenite and interdendritic eutectic consisted of gamma-austenite and M7C3 carbide. The gamma-austenite was a non-equilibrium phase with extended solid solution of alloying elements and a great deal of defect structures, i.e. a high density of dislocations, twins, and stacking faults existed in gamma phase. During high temperature aging, in situ carbide transformation occurred of M7C3 to M23C6 and M6C. The precipitation of M23C6, MC and M2C carbides from austenite was also observed. |
| 学科主题 | 力学 |
| 类目[WOS] | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | WEAR |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000083046500010 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/16104]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Wu XL,Chen GN. Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating[J]. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing,1999,270(2):183-189. |
| APA | 武晓雷,&陈光南.(1999).Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating.Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing,270(2),183-189. |
| MLA | 武晓雷,et al."Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating".Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 270.2(1999):183-189. |
入库方式： OAI收割
来源：力学研究所
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