Study on the Microstructure of High-Speed Steel and its Friction and Wear Behavior Without Lubrication

A systematic analysis is conducted to assess the impact of critical parameters, including temperature, load, and friction speed, on the friction and wear properties of HSS, particularly under elevated temperature conditions. The findings reveal that HSS predominantly comprises rod-shaped MC-type carbides, lamellar M2C-type carbides. Furthermore, the study identifies partial coherence at the interface between MC-type carbides and the martensite matrix, alongside stacking fault structures within the martensite matrix. Thermodynamic calculation indicates the austenitization temperature is 813°C, and MC-type carbides were not completely dissolved until after 1200°C. Through comprehensive high temperature in-situ X-ray diffraction analysis, it is demonstrated that oxidation of HSS remains negligible below 600°C, with a marked increase in oxidation levels observed at higher temperatures.

Keywords: High-speed steel, dry friction, high-temperature oxidation, friction coefficient

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Wang, Tong and Cao, Ying and Xu, Zhihua and Wang, Xiaorong and Wang, Yu and Qian, Sicheng and Cao, Shuai and Ding, Minyao and Cao, Shengnan and Zheng, Baochao and Cui, Shaogang, Study on the Microstructure of High-Speed Steel and its Friction and Wear Behavior Without Lubrication. Available at SSRN: https://ssrn.com/abstract=5072851 or http://dx.doi.org/10.2139/ssrn.5072851