Tribological properties of duplex treated TiN/TiCN coatings on plasma nitrided PH15-5 steel
Tribological properties of duplex treated TiN/TiCN coatings on plasma nitrided PH15-5 steel
复制标题
DOI：
10.1016/j.surfcoat.2006.08.135
复制
发表时间：
2007-03
影响因子：
5.4
通讯作者：
I. Zukerman;A. Raveh;Y. Landau;R. Weiss;R. Shneck;Y. Shneor;H. Kalman;J. E. Klemberg-Saphieha;L. Martinu
中科院分区：
文献类型：
--
作者：
I. Zukerman;A. Raveh;Y. Landau;R. Weiss;R. Shneck;Y. Shneor;H. Kalman;J. E. Klemberg-Saphieha;L. Martinu
采用单频或双频放电模式，在523 K的低温下进行了等离子体渗氮，然后在723 K的PH 15 -5基片温度下沉积了3 μm厚的TiCN或TiN/TiCN涂层。氮化层由化合物层和扩散层两个不同的亚层组成，总厚度约为60 μm。化合物层为γ′-Fe 4 N，扩散层为氮在铁中的固溶体。用单模等离子体制备的复合层厚度为0.55 μm，而用双频等离子体制备的复合层厚度为0.35 μm。结果发现，使用球-盘试验，由双频模式制备的等离子渗氮层提高了近一个数量级的耐磨性和提高了两倍的抗冲蚀性，与未经处理的钢相比。这一改进对于两种渗氮处理和两种类型的硬质涂层是共同的。特别是，较厚的化合物层不会损害双重处理的耐磨性或耐侵蚀性。耐冲蚀性与最上层氮化层或沉积层的硬度呈线性关系。
Nitriding was carried out in low pressure plasma excited by single- or dual-frequency discharge modes, at a substrate temperature of 523 K, followed by the deposition of 3 μm thick TiCN or TiN/TiCN coatings at a PH15-5 substrate temperature of 723 K. The nitrided layer was comprised of two distinct sublayers, namely a compound layer and a diffusion layer, with a total thickness of ∼60 μm. The compound layer was γ′-Fe4N and the diffusion layer was a solid solution of nitrogen in iron. The thickness of the compound layer fabricated by a single mode plasma is ∼5 μm, while that fabricated by dual-frequency mode plasma is ∼35 μm. It was found, using a ball-on-disk test, that the plasma nitrided layer fabricated by dual-frequency mode improved wear resistance by nearly one order of magnitude and improved the erosion resistance by a factor of two, compared with untreated steel. This improvement was common to the two nitriding treatments and both types of hard coatings. In particular, a thicker compound layer did not impair the wear resistance or the erosion resistance of the duplex treatment. The erosion resistance shows a linear dependence on the hardness of the uppermost nitrided or deposited layer.