Effect of tempering temperature on the wear behaviour of martensitic ductile iron

Abstract

Ductile cast irons (DCIs) with different microstructures have been widely investigated and applied. The present work aims to illustrate the effect of different tempering temperatures (150–600°C) on the wear behaviour of martensitic ductile cast iron. The results indicate that the wear rate increases with tempering temperatures above 300°C. The lowest wear rate is found after tempering at 150–300°C, where the smearing of graphite forms a solid lubricating film and maybe an oxide layer on the wear surfaces during the sliding process. With further increases in the tempering temperature, the main wear mechanism changes from abrasive wear to adhesive wear. It shows that martensitic ductile cast iron can be used as a self-lubricated bearing material in the future.

KEYWORDS:

• Ductile cast iron
• tempering temperature
• wear rate
• wear mechanism

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This research was supported by the Central Iron and Steel Research Institute independently invested in a special research and development fund (No. shi20T61200ZD), the National Natural Science Foundation of China (Nos. 51871062 and 52171105), and the Fundamental Research Funds for the Central Universities of China (No. 2020CDJDPT001). X. Zhang acknowledges the support from the European Research Council (ERC) under the European Union Horizon 2020 research and innovation program (grant agreement No. 788567-M4D) and the support by a research grant (00028216) from VILLUM FONDEN.