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赵宁,陶礼,郭辉,张蒙祺.超细WC颗粒对纳米CeO2增强激光镍基涂层的显微组织和耐磨性影响[J].稀有金属材料与工程(英文),2018,47(1):20~25.[Zhao Ning,Tao Li,Guo Hui and Zhang Mengqi.Effect of ultra-fine WC particles on microstructural evolution and wear behaviors of Ni-based nano-CeO2 coatings produced by laser[J].Rare Metal Materials and Engineering,2018,47(1):20~25.]
Effect of ultra-fine WC particles on microstructural evolution and wear behaviors of Ni-based nano-CeO2 coatings produced by laser
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Received:December 28, 2016  Revised:March 20, 2017
DOI:
Key words: Ce  tribo-mechanical properties  laser  Ni-based alloy  WC
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目),中国科学院重大资助项目
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Zhao Ning,Tao Li,Guo Hui and Zhang Mengqi  
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Abstract:
      The wear properties and microstructure of CO2 laser cladded Ni-based alloy coatings with 1wt.% nano-CeO2 and 20wt.% WC addition(CeO2/Ni) was compared with Ni-based coatings with 1wt.% nano-CeO2 addition(WC-CeO2/Ni). Both coatings were successfully cladded on 30CrMnSiNi2A steel with good metallurgical bounding to substrate. The influence of ultra-fine carbide WC on the microstructure of WC-CeO2/Ni alloy composite coatings were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) and electron probe micro analysis (EPMA). WC addition increased M23C6 content, the M7C3 decreased. The comparison of comprehensive mechanical properties between coatings with and without fine WC particles were conducted on Vickers hardness and wear-resistance test system. Results indicated that the performance of WC-CeO2/Ni is better than CeO2/Ni MMC. Few hot cracks appeared in Ni-based WC-CeO2 metal matrix composition (MMC) production, which were investigated by SEM and EDS. The crack mechanism can be claimed as Fe dilution and coefficient of thermal expansion for WC-CeO2/Ni MMC differed from that of base material 30CrMnSiNi2A steel.