Study on Microstructure and Aabrasive Resistance of Laser Cladding TiN Surface Alloyed TC9
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摘要: 通过SEM观察,EDX、XRD分析,以及显微硬度测试和干滑动摩擦磨损试验,研究了TC9表面激光熔覆TiN涂层的显微组织、硬度分布及耐磨性.结果表明:激光熔覆TiN涂层与基材结合紧密,熔覆层的显微组织中弥散分布着大量的大大小小的枝晶TiN和未熔TiN 等硬质点相,TC9表面激光熔覆TiN 涂层具有比基材TC9高得多的耐磨性.Abstract: Laser surface cladding with TiN is utilized to improve the wear resistance of TC9 titanium alloy. Microstructure and phase constitution are studied by using SEM, EDX and XRD. Microhardness measurements and wear experiments without lubrication are performed to test the properties. The experimental results show that there is a strong bonding between the laser surface cladded layer and the substrate. TiN dentrites of different size and unmelted TiN particles exist in the laser surface cladded layer. Unlubricated sliding wear test shows that wear resistance of TC9 alloy laser surface cladded with TiN is improved noticeably compared with that of the substrate.
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Key words:
- titanium alloys /
- micro structure /
- wear resistance /
- laser cladding /
- hard partide phase
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1 .Ayers J D.Wear bchavior of carbide-injected titanium and aluminum alloys.Wear,1984,97:249~266 2. 张志明,车成卫,翟 阳.Ti-6Al-4V激光TiC合金化涂层组织及其磨损行为.焊接学报,1992,13(3):141~145 -
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