摘要
为了改善纯钛的表面性能,利用等离子表面合金化技术在纯钛表面形成Zr-N改性层。对Zr-N改性层的微结构、成分及硬度进行测试,并对改性层形成及表面硬度提高的机理进行分析。利用球-盘磨损试验对表面改性纯钛的摩擦学性能进行研究。结果表明,在纯钛表面形成了均匀致密的Zr-N改性层,改性层由表面Zr-N化合物层和基体内Zr、N的扩散层构成。Zr-N表面改性层显著提高了纯钛的表面硬度,表层的最高硬度约为HK1040。Zr-N表面改性层没有减摩效果,但明显改善了纯钛的磨损性能。
The Zr?N alloying layers were prepared on the surface of pure titanium substrates by plasma surface alloying technique to improve the surface properties. The microstructure, chemical composition, and hardness of Zr?N surface alloying layers were analyzed to understand the mechanisms of surface alloying and hardness improvement. The tribological performance of Zr?N surface alloying layers was studied by ball-on-disc wear machine. The results show that Zr?N alloying layers formed are homogeneous and compact. The Zr?N surface alloying layer consists of an outer nitride layer and an inner diffusion zone of zirconium and nitrogen. The surface treatment enhances the hardness of the surface layers of pure titanium substrates greatly and a surfaces hardness of HK1870 is obtained. Though Zr?N surface alloying layer does not show friction-reducing effect, it improves the wear resistance of pure titanium obviously.
出处
《中国有色金属学会会刊：英文版》
SCIE
EI
CAS
CSCD
2013年第6期1628-1632,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(51171125)supported by the National Natural Science Foundation of China
Project(2012011021-3)supported by the Natural Science Foundation of Shanxi Province,China
关键词
纯钛
等离子表面合金化
Zr-N表面合金层
硬度
摩擦学性能
pure titanium
plasma surface alloying
Zr-N surface alloying layer
hardness
tribological properties
