纯钛TA2激光气体氮化涂层的组织与性能

齐勇田; 刘世玺; 张世忠

doi:10.7513/j.issn.1004-7638.2014.06.005

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纯钛TA2激光气体氮化涂层的组织与性能

doi: 10.7513/j.issn.1004-7638.2014.06.005

包头职业技术学院材料工程系, 内蒙古包头 014030

基金项目:

高等学校包头职业技术学院科学研究项目 (Y201301)

详细信息

作者简介:
齐勇田 (1970-) 男, 山东泰安人, 副教授, 主要从事新材料及连接技术的研究

中图分类号: TF823,TG174.44
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- 文章访问数: 251
- HTML全文浏览量: 45
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2014-03-18

Study on Microstructure and Properties of the Coating Layer on Titanium by Laser Gas Nitriding

Baotou Vocational and Technical College, Baotou 014030, Inner Mongolia, China

摘要

摘要: 使用快速横流的CO₂连续激光器在工业纯钛TA2表面进行激光气体氮化改性处理,制备形成致密、无裂纹缺陷的改性层。用扫描电镜和能谱分析仪对激光气体氮化改性层的色泽、宏观形貌和微观组织进行分析;利用显微硬度计对氮化区域的显微硬度进行测试。研究结果表明:经过激光表面氮化处理后,在基体纯钛TA2表面发生了化合反应,生成以TiN为增强相的金黄色耐磨涂层。氮化改性层的组织主要是由细小的、枝晶状的TiN构成。随着激光输出功率的增加,TiN涂层的色泽特征由浅变深,表面形态由平整变为皱状。工业纯钛TA2显微硬度提高,表面强化明显。
- 激光气体氮化 /
- 碳化钛涂层 /
- 工业纯钛 /
- 微观组织
Abstract: The process of laser gas nitriding on the surface of commercial pure titanium TA2 was carried out and the compact coating layer without crack defects was obtained by 5 kW continuous wave CO₂ laser under N₂ environment.The microstructure of nitriding coating layer was analyzed by scanning electron mi-croscopy (SEM) and energy dispersive spectrometer (EDS),and the microhardness of the nitriding layer was measured by microhardness meter.The results show that TiN is formed on the surface of TA2 which serves as a reinforcing phase by laser gas nitriding.The nitriding layer mainly consists of TiN with fine and dendritic structures.The surface color and feature of the TiN coating layer change with the increase of laser power.The microhardness and properties of TA2 are improved obviously.
- laser gas nitriding /
- TiN coating layer /
- commercial pure titanium /
- microstructure