|
|||||
|
|
| 激光熔覆Ni-Cr-B-Si-C合金涂层显微组织的透射电镜研究 | |
| 引用本文： | 李强,雷廷权,孟庆昌,张大伟,王富耻,周玉.激光熔覆Ni-Cr-B-Si-C合金涂层显微组织的透射电镜研究[J].中国激光,1999,26(4):372-378. |
| 作者姓名： | 李强 雷廷权 孟庆昌 张大伟 王富耻 周玉 |
| 作者单位： | 1. 哈尔滨工业大学材料科学与工程学院,哈尔滨,150001,福州大学材料科学与工程学院,福州,350002 2. 哈尔滨工业大学材料科学与工程学院,哈尔滨,150001 3. 福州大学材料科学与工程学院,福州,350002 |
| 基金项目： | 金属精密热加工国防科技重点实验室资助项目 |
| 摘 要： | 激光熔覆Ni-Cr-B-Si-C合金涂层组织由块状CrB型硼碳化物,树枝状Cr7C3型碳化物,胞枝状γ-Ni固溶体以及共晶产物组成。依局部成份条件,形成γ-Ni M23C6共晶和γ-Ni 镍硼化物共晶。熔覆过程的非平衡性质导致γ-Ni/Ni3B稳定凝固和γ-Ni/Ni2B亚稳定凝固并存。受快速凝固引起的热应力所致在Cr7C3和M23C6中发生高密度孪生。此外,涂层中存在非晶相,由非晶相包围的γ-Ni固溶体形成调制结构。 |
| 关 键 词： | 激光熔覆 Ni-Cr-B-Si-C合金 非晶相 |
| 收稿时间： | 1997/11/25 |
Transmission Electron Microscopy for Microstructural Characterization of the Laser Clad Ni-Cr-B-Si-C Alloy |
|
| Li Qiang,Lei Tingquan,Meng Qingchang,Zhang Dawei,Wang Fuchi,Zhou Yu.Transmission Electron Microscopy for Microstructural Characterization of the Laser Clad Ni-Cr-B-Si-C Alloy[J].Chinese Journal of Lasers,1999,26(4):372-378. | |
| Authors: | Li Qiang Lei Tingquan Meng Qingchang Zhang Dawei Wang Fuchi Zhou Yu |
| Abstract: | The microstructure of laser clad Ni-Cr-B-Si-C alloy is composed of blocky CrB type chromium carbon borides , Cr7C3 type chromium boron carbides, cellular-dendritic γ-Ni solid solution and various eutectic products. Either an eutectic of γ-Ni+M23C6 or an eutectic of γ-Ni+nickle borides forms depending on the local composition. γ-Ni/Ni3B stable solidification and γ-Ni/Ni2B metastable solidification take place at the same time because of the rapid solidification involved in the laser cladding. Both Cr7C3 and M23C6 contain a high density of twins resulted from stress associated with rapid solidification. In addition, an amorphous phase was found, the γ-Ni surrounded by the amorphous phase exhibited a tweed contrast, suggestiv of a modulated structure. |
| Keywords: | laser cladding Ni Cr B Si C alloy amorphouse phase |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |