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2222材料工程  2017, Vol. 45 Issue (3): 73-79    DOI: 10.11868/j.issn.1001-4381.2016.000002
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
爆炸喷涂WC-Co/MoS2-Ni多层复合自润滑涂层的摩擦学行为
王铁钢1,*(), 李柏松1, 阎兵1, 范其香1, 刘艳梅1, 宫骏2, 孙超2
1 天津职业技术师范大学 天津市高速切削与精密加工重点实验室, 天津 300222
2 中国科学院 金属研究所, 沈阳 110016
Tribological Behavior of Multi-layered WC-Co/MoS2-Ni Self-lubricating Coating Fabricated by Detonation Gun Spraying
Tie-gang WANG1,*(), Bai-song LI1, Bing YAN1, Qi-xiang FAN1, Yan-mei LIU1, Jun GONG2, Chao SUN2
1 Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin 300222, China
2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
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摘要 

采用爆炸喷涂技术研制WC-Co/MoS2-Ni多层复合自润滑涂层,系统研究涂层的微观结构、元素分布、结合强度和摩擦磨损性能。结果表明:在高温爆炸喷涂过程中,少量MoS2发生氧化分解,生成SO2气体,残留在涂层内的SO2气体可使局部形成微小孔洞。在摩擦测试中,WC-Co涂层在预磨阶段摩擦因数迅速上升,进入稳定阶段后,摩擦因数缓慢增加;而多层复合涂层的摩擦因数在经历预磨阶段迅速上升后,很快进入稳定阶段,直至表层WC-Co涂层被磨穿后,摩擦因数开始逐渐下降。添加自润滑涂层MoS2-Ni后,WC-Co涂层的内聚结合强度略有下降,但减摩效果显著,摩擦因数下降了约40%,耐磨性能略有提升。

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王铁钢
李柏松
阎兵
范其香
刘艳梅
宫骏
孙超
关键词 WC-Co/MoS2-Ni涂层自润滑涂层爆炸喷涂摩擦磨损    
Abstract

The multilayered composite WC-Co/MoS2-Ni self-lubricating coatings were prepared by detonation gun spraying technology. The coating microstructure, element distribution, adhesive strength, and tribological properties were studied systematically. The results show that a little of MoS2 is oxidized and decomposed into gas of SO2 during the high-temperature spraying process. The SO2 left in the coating and can form into the micro porosities. The friction coefficient of the WC-Co coating first increases rapidly in the initial running-in phase, and then gradually increases slightly after entering into the steady-state phase; whereas the friction coefficient of multilayer composite coating steps in the steady-state phase soon and starts to decline gradually when the top WC-Co coating became perforated. By comparison, the coating cohesion declines slightly after adding the self-lubricating layer MoS2-Ni, but the friction coefficient decreases by about 40%, and the wear resistance is also improved slightly.

Key wordsWC-Co/MoS2-Ni coating    self-lubricating coating    detonation gun spraying    friction and wear
收稿日期: 2016-01-04      出版日期: 2017-03-22
中图分类号:  TH117.3  
基金资助:国家自然科学基金(51301181);天津市应用基础与前沿技术研究计划(15JCZDJC39700);天津市科技特派员项目(16JCTPJC49500);天津市高等学校创新团队培养计划项目(TD12-5043);天津职业技术师范大学科研发展基金(KJ14-22)
通讯作者: 王铁钢     E-mail: sytgwang@163.com;tgwang@tute.edu.cn
作者简介: 王铁钢 (1978-), 男, 副教授, 博士后, 研究方向:硬质涂层, 联系地址:天津市高速切削与精密加工重点实验室 (300222), E-mail:sytgwang@163.com; tgwang@tute.edu.cn
引用本文:   
王铁钢, 李柏松, 阎兵, 范其香, 刘艳梅, 宫骏, 孙超. 爆炸喷涂WC-Co/MoS2-Ni多层复合自润滑涂层的摩擦学行为[J]. 材料工程, 2017, 45(3): 73-79.
Tie-gang WANG, Bai-song LI, Bing YAN, Qi-xiang FAN, Yan-mei LIU, Jun GONG, Chao SUN. Tribological Behavior of Multi-layered WC-Co/MoS2-Ni Self-lubricating Coating Fabricated by Detonation Gun Spraying. Journal of Materials Engineering, 2017, 45(3): 73-79.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.000002      或      http://jme.biam.ac.cn/CN/Y2017/V45/I3/73
Parameter Value
Working pressure for O2/MPa 1.15
Working pressure for C2H2/MPa 1.20
Working pressure for N2/MPa 1.15
Volume ratio of O2 to C2H2 0.72-1.52
Spraying distance/mm 60-140
Frequency/(shot·s-1) 4
Powder feed rate/(g·s-1) 1.0-1.4
Coating thickness/μm ~500
Table 1  爆炸喷涂工艺参数
Fig.1  WC-Co/MoS2-Ni多层复合涂层的截面形貌 (a) 全貌;(b) 局部放大
Fig.2  MoS2-Ni涂层的S 2p XPS谱 (a) 和Mo 3d解谱 (b)
Fig.3  WC-Co/MoS2-Ni多层复合涂层截面元素的分布及背散射图像 (a) BSE图像;(b) W;(c) Co;(d) Mo;(e) S;(f) Ni
Fig.4  WC-Co/MoS2-Ni多层复合涂层摩擦磨损实验时的截面示意图
Fig.5  多层复合自润滑涂层经不同滑动时间的摩擦学性能 (a) 摩擦因数;(b) 磨损体积
Fig.6  多层复合涂层在不同时间的磨损形貌 (a)30min;(b)45min;(c)60min;(d)90min;(e)图 6(a)中选区的EDS分析结果
Fig.7  法向载荷为30N时,WC-12%Co涂层与WC-Co/MoS2-Ni多层复合涂层的摩擦因数
Fig.8  法向载荷为30N,与Si3N4球对磨30min后,WC-12% Co涂层和多层复合涂层的磨损体积 (a) 和磨损率 (b)
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