Tribological Properties of Ultrafine-grained WC-6Co Cemented Carbide over a Wide Temperature Range: Influence of Titanium Alloy and Bearing Steel Counterparts
Author of the article: DAIZiyang1,2, YU Yuan1,3,4, LIU Yulin1, FANG Guangkai5, QIAO Zhuhui1,3,4
Author's Workplace：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
Key Words： ultrafine-grained WC-6Co cemented carbide; wide temperature range; tribological behaviors; counterparts; wear mechanisms
Abstract：
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.
