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材料研究学报  2013, Vol. 27 Issue (3): 279-286    
  研究论文 本期目录 | 过刊浏览 |
定向凝固镍基复合涂层的摩擦磨损性能*
杨贵荣1,赵虎1,宋文明1,2,李健3,马颖1
1. 兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室 甘肃省有色金属合金及
加工教育部重点实验室 兰州 730050
2. 甘肃蓝科高新石化装备股份有限公司 兰州 730070
3. 武汉材料保护研究所 武汉 430030
Wear Behavior of Ni-base Composite Coating With Directional Solidification Structure
YANG Guirong1** ZHAO Hu1 SONG Wenming1,2 LI Jian3 MA Ying1
1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials & Key Lab. of Non-ferrous Metal Alloys and Processing, The Ministry of Education, Lanzhou University of Technology, Lanzhou 730050
2. Lanpec Technologies Limited, Lanzhou 730070
3. Wuhan Research Institute of Materials Protection, Wuhan 430030
引用本文:

杨贵荣, 赵虎, 宋文明,李健, 马颖. 定向凝固镍基复合涂层的摩擦磨损性能*[J]. 材料研究学报, 2013, 27(3): 279-286.
YANG Guirong, ZHAO Hu, SONG Wenming, LI Jian, MA Ying. Wear Behavior of Ni-base Composite Coating With Directional Solidification Structure[J]. Chinese Journal of Materials Research, 2013, 27(3): 279-286.

全文: PDF(6666 KB)  
摘要: 用真空熔覆技术在ZG45表面制备出20%WC+Ni和5%G+20%WC+Ni复合涂层, 研究了涂层的微观组织结构和常温摩擦磨损性能, 揭示了磨损机理。结果表明: 复合涂层由Ni基固溶体和Fe3Ni等硬质相组成, 组织致密, 与基体结合良好, 微观组织具有定向凝固组织特征; 涂层内和涂层与基体的结合界面处没有夹杂孔洞等缺陷; 在摩擦参数相同的情况下5%G+20%WC+Ni涂层的摩擦系数及其波动范围和磨损量均低于20%WC+Ni涂层; 20%WC+Ni涂层的磨损率随着频率的增大而增加, 而5%G+20%WC+Ni复合涂层的磨损率的变化情况则相反; 20%WC+Ni涂层以磨粒磨损与氧化磨损为主, 5%G+20%WC+Ni涂层为微片层脆性断裂与氧化磨损为主。
关键词 复合材料定向凝固真空熔覆镍基自润滑涂层摩擦磨损性能    
Abstract:The composite 20%WC+Ni and 5%G+20%WC+Ni coatings were prepared by vacuum cladding method on the ZG45 substrate. Microstructures, forming mechanism for the coatings and the tribological properties were investigated. The results show that the microstructure of composite coating is dense, and there are not any inclusion and pores at the interface of the coating and substrate. The main composition of coating is Ni- based solid solution and hard intermetalic compounds. The major influential factor of the isomeric microstructure is the directional solidification during metal solidification. The wear results show that the friction coefficient and fluctuation of friction coefficient of 5%G + 20%WC+ Ni coating are lower than that of 20%WC + Ni coating for the same wearing testing parameters. The wear rate of 20%WC + Ni coating increases with the increasing wear frequency, whereas the wear rate of 5%G + 20%WC + Ni coating decreases with the increasing wear frequency. The abrasive wear and oxidation wear dominate the wearing process of 20%WC + Ni coating, and the oxidation wear and micro-crack lamellar for 5%G+20%WC+Ni coating.
Key wordscomposites    directional solidification    vacuum fusion sintering    Ni-base self-lubricating coating    friction-wear property
收稿日期: 2013-03-25     
ZTFLH:  TH117  
基金资助:* 国家自然科学基金51205178和甘肃省自然基金1208RJZA189资助项目。
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