| 金属钛激光气体氮化层组织及表面特征 |
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| 引用本文： | 崔振铎,杨贤金,朱胜利,文效忠.金属钛激光气体氮化层组织及表面特征[J].材料工程,2004(4):3-6,10. |
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| 作者姓名： | 崔振铎 杨贤金 朱胜利 文效忠 |
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| 作者单位： | 1. 天津大学材料学院,天津,300072
2. 香港理工大学工业及系统工程系,香港 |
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| 摘 要： | 采用连续波Nd-YAG激光在氮气环境中对金属钛进行激光气体氮化处理.利用SEM,XRD,XPS研究氮化层的显微组织、表面成分、结构.结果表明:通过激光气体氮化可以在金属钛表面得到表面相对平滑、无裂纹的氮化层;氮化层与基体材料之间为冶金结合.氮化层主要由枝晶状TiN组成,同时有TiNxOy,TiO2及TiC存在,外表面有C,O污染或吸附;TiN枝晶密度由表面沿深度方向下降.
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| 关 键 词： | 金属钛 激光气体氮化 表层 特征 |
| 文章编号： | 1001-4381(2004)04-0003-04 |
Microstructure and Surface Characteristics of the Laser Gas Nitrided Titanium |
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| GUI Zhen-duo,YANG Xian-jin,ZHU Sheng-li,H C Man.Microstructure and Surface Characteristics of the Laser Gas Nitrided Titanium[J].Journal of Materials Engineering,2004(4):3-6,10. |
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| Authors: | GUI Zhen-duo YANG Xian-jin ZHU Sheng-li H C Man |
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| Abstract: | A continuous wave Nd-YAG laser was used to perform laser gas nitriding on titanium. The microstructure, surface composition and structure were investigated by SEM, XRD and XPS. The results show that a relatively smooth and crack-free nitrided layer was obtained on titanium by laser gas nitriding. Metallurgical bonding between the nitrided layer and Ti substrate was observed. The outmost surface of the nitrided layer was found to be comprised of dendritic TiN, TiNxOy , TiO2 and TiC. Carbon and oxygen contamination were detected on the outmost surface of the sample. The intensity of the TiN dendrite in the nitrided layer decreased with increasing depth. |
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| Keywords: | titanium laser gas nitriding surface layer characteristics |
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