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,2018,47(1):20~25.[Zhao Ning,Tao Li,Guo Hui,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.]
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
投稿时间:2016-12-28  修订日期:2017-03-20
中文关键词:  Ce  机械磨损性能  激光  镍基合金  WC
基金项目: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
中文摘要:
      CO2激光器熔覆1wt.%纳米CeO2和20wt.%WC添加的镍基合金涂层的磨损、显微组织与1wt.%纳米CeO2添加镍基合金涂层进行对比。上述两种涂层均熔覆在基体30CrMnSiNi2A上并呈优良冶金结合。超细碳化物WC对WC-CeO2/Ni涂层的显微组织影响由X射线衍射(XRD),扫描电镜(SEM)连同能量色散谱(EDS),电子探针(EPMA)进行分析。添加WC后M23C6增多,而M7C3减少。通过维氏硬度计和磨损测试系统对有WC添加和无添加CeO2镍基合金涂层进行综合机械性能比。得出结论WC-CeO2/Ni涂层明显优于CeO2/Ni涂层。极少数热裂纹出现于WC-CeO2/Ni涂层,萌生并扩展于熔池凝固过程中,对此做了SEM和EDS分析。裂纹机理可归因为铁稀释和WC添加导致的涂层与基体30CrMnSiNi2A间线膨胀系数间差异。
Effect of ultra-fine WC particles on microstructural evolution and wear behaviors of Ni-based nano-CeO2 coatings produced by laser
英文关键词:Ce  tribo-mechanical properties  laser  Ni-based alloy  WC
英文摘要:
      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.
作者单位E-mail
赵宁 西北工业大学机电学院 zhaon@nwpu.edu.cn 
陶礼 西北工业大学机电学院 taoli0401@163.com 
郭辉 西北工业大学机电学院  
张蒙祺 西北工业大学机电学院  
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