Journal
TRIBOLOGY INTERNATIONAL
Volume 154, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2020.106719
Keywords
High-speed steel; M6C carbides; Slippage rate; Wear mechanism
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Funding
- Plan for National Natural Science Foundation of China [51171060]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1234]
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The effect of slippage rate on frictional wear behaviors of high-tungsten high-speed steel (HTHSS) under high-pressure contact was studied. The peak friction coefficient occurs at a slippage rate of 5.5%. An increase in slippage rate changes the wear failure mechanism from fatigue to scratch, resulting in a significant increase in wear weight loss. The roles of different scale M6C carbides in resisting wear were also discussed.
The article studies on the effect of slippage rate on frictional wear behaviors of high-tungsten high-speed steel (HTHSS) under high-pressure contact by using a self-made ring-on-ring wear machine. The microstructure of HTHSS is characterized by dual-scale tungsten carbides, including microscale eutectic M6C carbide [(Fe0.55W0.30Cr0.08Mo0.07)(6)C] and nanoscale secondary M6C carbide. Slippage rate has a significant effect on frictional wear behaviors. The peak value of friction coefficient occurs at the slippage rate of 5.5%. The friction coefficient will reduce whether the slippage rate increases or decreases. However, the increase in slippage rate makes wear failure mechanism change from fatigue to scratch, causing continuously significant increase in wear weight loss. The roles of different scale M6C carbides in resisting wear were also discussed.
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