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180211丨超音速等离子喷涂MoWCu 合金涂层的性能

   日期:2018-02-06     作者:闫涛,刘贵民等    浏览:1399    评论:0    
核心提示:中文核心期刊,中国科技核心期刊! DOI: 10.19289/j.1004-227x.2018.02.011超音速等离子喷涂MoWCu 合金涂层的性能闫涛1, 2, *,

中文核心期刊,中国科技核心期刊!


 

DOI: 10.19289/j.1004-227x.2018.02.011

超音速等离子喷涂MoWCu 合金涂层的性能

 

 

闫涛1, 2, *,刘贵民2,朱硕2,邱刚3,杜林飞2,惠阳2

(1.陆军装甲兵学院装备再制造技术国防科技重点实验室,北京 100072;

2.陆军装甲兵学院装备保障与再制造系,北京 100072;

3.陆军装甲兵学院教保处,北京 100072)

摘要:采用超音速等离子喷涂技术在45CrNiMoVA 钢表面制备了MoWCu 合金涂层。利用场发射扫描电镜、能谱仪、X 射线衍射仪、维氏显微硬度计和球−盘式摩擦磨损试验机考察了涂层的形貌、成分、显微硬度和耐磨性,采用四探针法测量其导电性。

MoWCu 涂层的显微硬度平均值为486.2 HV0.1,比基体硬度提高1 倍,与纯Mo 涂层的显微硬度相当,但比MoW 涂层的显微硬

度略低。MoWCu 涂层与基体的结合强度为45.3 MPa,表现为机械结合。MoWCu 涂层的导电率为8.83%IACS,比纯Mo 涂层高2/5 左右。与纯Mo 涂层和MoW 涂层相比,在相同摩擦条件下,MoWCu 涂层的磨损体积最小,摩擦因数最低,主要以粘着磨损为主,同时伴有轻微的氧化磨损。

关键词:超高强钢;钼钨铜合金涂层;超音速等离子喷涂;显微硬度;导电性;摩擦学

中图分类号:TG174.442; TG115.58         

文献标志码:A                 

文章编号:1004 – 227X (2018) 02 – 0093 – 06

 

Properties of MoWCu alloy coating prepared by supersonic plasma spraying//YAN Tao*, LIU Gui-min, ZHU Shuo,QIU Gang, DU Lin-fei, HUI Yang

 

Abstract:

A MoWCu coating was prepared on 45CrNiMoVA steel by supersonic plasma spraying. The micromorphology, elemental composition, microhardness, and wear resistance of the coating were examined by scanning electron microscope,

energy-dispersive spectrometer, X-ray diffractometer, Vickers microhardness tester, and ball-on-disc tribometer, and its

conductivity was tested by four-point probe method. The average microhardness of MoWCu coating is 486.2 HV0.1, which

doubles that of the substrate and is close to that of a pure Mo coating, but slightly lower than that of a MoW coating. The MoWCu coating is mechanically bonded to the substrate with a bonding strength of 45.3 MPa, and has a conductivity of 8.83%IACS, which is about 2/5 higher than that of the pure Mo coating. As compared with pure Mo coating and MoW coating, the MoWCu coating has a smallest wear volume and lowest friction coefficient under the same friction conditions. The wear of MoWCu coating is mainly ascribed to adhesive wear accompanied by slight oxidation wear.

Keywords: ultrahigh-strength steel; molybdenum–tungsten–copper alloy coating; supersonic plasma spraying; microhardness;conductivity; tribology

First-author’s address:

 

Key Laboratory on Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072,China

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