Effect of spheroidal ausferritic cast iron structure on tribocorrosion resistance. (September 2022)

• Record Type: Journal Article
• Authors: Stachowiak, Arkadiusz; Wieczorek, Andrzej N.; Nuckowski, Paweł; Staszuk, Marcin; Kowalski, Marcin
• Is Part Of: Tribology international. Volume 173(2022)
• Publication Date: 2022-09
• Subjects: Tribocorrosion -- Spheroidal cast iron -- Industrial test; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2022.107688
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The purpose of this article was to determine the phase composition of ADI cast irons that would ensure maximum resistance to tribocorrosion. This article presents the results of testing four cast iron variants with different austenite content levels (40–12 %) and, consequently, different hardness levels (284–387HB). In tests the resistance of the materials to abrasive wear and tribocorrosion in 3.5 % NaCl was compared. It has been observed that the resistance to purely mechanical wear increases with an increase in the hardness level. However, the highest hardness does not ensure the highest resistance to tribocorrosion. The best complex of properties, which guarantees the lowest tribocorrosion, is found in the cast iron with an austenite content of about 20 % and hardness of 382HB. Highlights: The tribocorrosion resistance of spheroidal cast irons with different austenite content (different hardness) was investigated. The optimal cast iron structure was searched for in order to obtain the highest tribocorrosion resistance level. The strengthening effect of cast iron due to frictional interactions was also identified during the tribocorrosion process. It has been shown that the highest hardness of the tested material does not provide the highest resistance to tribocorrosion. ADI_1200 spheroidal cast iron with an austenite content of 20 % proved to be the most resistant to the tribocorrosion process.