P.W.Shum
,
M.Escursell
,
T.H.Wong
,
K.Y.Li
,
Z.F.Zhou
,
Y.G.Shen
金属学报(英文版)
Titanium-aluminium-nitride (Ti1-xAlxN) coatings were deposited by close-field unbalanced magnetron sputtering on M42 steel substrates and WC-6wto inserts at 450℃. The tribological behavior was analyzed by sliding against steel and WC-6wt0o balls, while the turning performance was evaluated by a conventional turning machine at high cutting speeds without using coolants. In the tribological tests, the formation of transfer layer and the variations of hardness of the coatings played an important role for sliding against steel balls. For the coatings sliding against WC-6wto balls, the Ti-Al-N coatings showed a similar friction coefficient, but the TiN coating exhibited a lower value. The difference could be explained by the tri-oxidation wear mechanism. In the turning tests, a superior cutting performance of the coating was found at x=0.45, which endured 38 minutes before the tool flank wear reached the maximum value of 0.3mm, whereas only 20 minutes were endured for the TiN coating. The excellent performance of the coatings in the turning tests could be explained by the enhanced mechanical properties and oxidation/diffusion resistance of the coatings.
关键词:
hardness
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null
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朱军亮
,
王更柱
,
解志文
,
陈添
,
宋晓航
,
高旭
,
于晓光
,
宋华
表面技术
doi:10.16490/j.cnki.issn.1001-3660.2015.04.010
目的：采用多元等离子体注入与沉积( MPIIID)技术制备Ti-Al-N涂层,系统研究涂层的微观组织结构、力学性能与摩擦学特性。方法借助XRD,XPS,SEM和TEM等,观察分析Ti-Al-N涂层的微观组织结构与物相组成,采用纳米压入试验仪、布氏硬度试验仪、摩擦磨损试验仪和激光共聚焦显微镜等测试分析Ti-Al-N涂层的力学性能、膜基结合力和摩擦磨损性能。结果 Ti-Al-N涂层表现出较高的膜-基结合强度。 Al元素掺杂诱发Ti-Al-N涂层发生严重晶格畸变。当Al原子数分数为6.18%时,Ti-Al-N涂层以c-TiAlN相结构为主,表现出超高硬度(达到39.83 GPa )；随着Al 元素含量增加,涂层中的软质h-TiAlN相结构增多,硬度随之下降。摩擦试验结果表明,低Al含量Ti-Al-N涂层的抗磨损能力良好,其主要磨损机制为磨粒磨损；高Al含量Ti-Al-N涂层的抗磨损能力较差,其主要磨损机制倾向粘着磨损。结论 MPIIID技术成功实现了Ti-Al-N涂层的低温制备与成分调控,低Al含量的Ti-Al-N涂层具有优良的力学性能和优异的抗磨损能力。
关键词:
多元等离子体注入与沉积
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Ti-Al-N涂层
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组织结构
,
摩擦磨损
