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宽温域条件下超细晶WC-6Co硬质合金 摩擦磨损性能：钛合金和轴承钢摩擦配副的影响
Tribological Properties of Ultrafine-grained WC-6Co Cemented Carbide over a Wide Temperature Range: Influence of Titanium Alloy and Bearing Steel Counterparts
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- DOI:
- 作者:
- 戴梓扬1，2，于 源1，3，4，刘育林 1，方广凯5，乔竹辉1，3，4
DAIZiyang1,2, YU Yuan1,3,4, LIU Yulin1, FANG Guangkai5, QIAO Zhuhui1,3,4
- 作者单位:
- 1. 烟台先进材料与绿色制造山东省实验室，山东烟台264006；2.太原理工大学材料科学与工程学院，山西太原 030024；3. 烟台中科先进材料与绿色化工产业技术研究院，山东烟台264006；4.中国科学院兰州化学物理研究所润滑 材料全国重点实验室，甘肃兰州730000；5.潍坊港华燃气有限公司，山东潍坊261000
1. Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai 264006, China; 2. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 3. Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 264006, China; 4. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China；5. Weifang Ganghua Gas Co., Ltd., Weifang 261000, China
- 关键词:
- 超细晶WC-6Co硬质合金；宽温域；摩擦磨损；摩擦配副；磨损机制
ultrafine-grained WC-6Co cemented carbide; wide temperature range; tribological behaviors; counterparts; wear mechanisms
- 摘要:
- 利用放电等离子烧结制备出了超细晶WC-6Co硬质合金，研究了摩擦配副(TC4钛合金和GCr15轴承钢) 对宽温域条件下超细晶WC-6Co硬质合金摩擦磨损性能的影响。 结果表明，超细晶WC-Co硬质合金与TC4钛合金对 磨时，在25~300℃，摩擦系数低，几乎未发生磨损，磨损机制为轻微的黏着磨损；在500℃，磨损表面的黏着磨损加剧， 并发生氧化磨损，导致摩擦系数快速增大；在700℃，硬质合金开始发生磨损。 与GCr15轴承钢对磨时，硬质合金 发生明显磨损，摩擦系数和磨损率随着环境温度的增大，呈现逐步增大趋势，室温和700℃磨损率分别为2.17×10-8和 6.81× 10-8 mm3/(N·m)；磨损机制为随着温度提高逐渐加剧的磨粒磨损，在高温环境下同时发生了氧化磨损。An ultrafine-grained WC-6Co cemented carbide was fabricated via spark plasma sintering. The influence of their counterparts on the tribological properties of ultrafine-grained WC-6Co cemented carbides over wide temperature ranges was investigated. When sliding against the TC4 titanium alloy, the ultrafine-grained WC-Co cemented sample exhibits a low friction coefficient and negligible wear from 25 to 300 ℃, which is dominated by mild adhesive wear mechanisms. At 500 ℃, intensified adhesive wear coupled with oxidative wear occurs, leading to a rapid increase in the friction coefficient. Obvious wear loss initiates at 700 ℃ . When sliding against GCr15-bearing steel, the cemented carbide experiences pronounced wear, with both the friction coefficient and wear rate progressively increasing with temperature, with wear rates of 2.17×10-8 and 6.81×10-8 mm3/(N·m) at room temperature and 700 ℃, respectively. The wear mechanism is dominated by abrasive wear. With increasing temperature, the abrasive wear intensifies, and oxidative wear occurs.