HVOF喷涂WC-10Co4Cr涂层的性能及滑动磨损机理

发布时间：2018-05-03 05:00

  本文选题：超音速火焰喷涂 + WC-CoCr涂层　； 参考：《表面技术》2017年03期

【摘要】：目的研究WC-10Co4Cr涂层的耐滑动磨损性能及机理。方法在0Cr13Ni5Mo不锈钢基体上,采用超音速火焰喷涂(HVOF)制备了WC-10Co4Cr金属陶瓷涂层。分析了WC-10Co4Cr涂层的物相组成、显微组织,并测试了其硬度、结合强度、孔隙率及在560 r/min和1120 r/min转速下的滑动磨损性能。结果涂层的显微硬度为1325HV0.2,结合强度为72 MPa。涂层组织致密,孔隙率为0.76%。在560 r/min下磨损10h,涂层与基体的磨损失重比为1:138.36;在1120 r/min下磨损10 h,涂层与基体的磨损失重比为1:127.44。结论在滑动摩擦磨损的初期,涂层的磨损失效机制主要表现为磨粒磨损。随着滑动速度的增大,涂层的磨损失效机制主要表现为疲劳磨损。
[Abstract]:Objective to study the sliding wear resistance and mechanism of WC-10Co4Cr coating. Methods WC-10Co4Cr cermet coatings were prepared on 0Cr13Ni5Mo stainless steel substrate by supersonic flame spraying (HVOF). The phase composition, microstructure, hardness, bonding strength, porosity and sliding wear properties of WC-10Co4Cr coatings at 560 r/min and 1120 r/min rotational speeds were analyzed. Results the microhardness of the coating was 1325 HV0.2 and the bonding strength was 72 MPA. The microstructure of the coating is compact and the porosity is 0.76. The wear weight loss ratio of coating to substrate was 1: 138.36 at 560 r/min for 10 h and 1: 127.44 at 1120 r/min for 10 h. Conclusion in the initial stage of sliding wear, the wear failure mechanism of the coating is mainly abrasive wear. With the increase of sliding speed, the wear failure mechanism of the coating is mainly fatigue wear.
【作者单位】： 水利部产品质量标准研究所;水利机械及其再制造技术浙江省工程实验室;浙江省水利水电装备表面工程技术研究重点实验室;
【基金】：浙江省科技计划项目(2014C31156) 浙江省科学计划项目(2013C31044)~~
【分类号】：TG174.4
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本文编号：1837057