부산대학교 도서관

In this study, the abrasion wear behavior of borided AISI 1045 steel under dry and wet conditions was evaluated. The powder-pack boriding process (PPBP) was carried out at 1223 K with 8 and 10 h of exposure using EKabor-II boride powder for dry and wet abrasion tests. A biphasic layer composed of FeB and Fe2B was obtained over the surface of the AISI 1045 steel with a thickness of ~ 265 and ~ 304 μm for 8 and 10 h, respectively. Afterwards, when the PPBP was accomplished, the diffusion annealing process (DAP) was carried out at 1273 K with 8 and 10 h of exposure time in a SiC medium, obtaining a monophasic layer of Fe2B of ~ 212 μm and ~ 250 μm with 8 and 10 h, respectively. Dry and wet abrasion wear tests on PPBP, PPBP + DAP, and reference material of AISI 1018 steel were performed, considering the guidelines of the ASTM G105-16 and ASTM G65-16 standard procedures. Finally, 8 h the PPBP improves the wear rate around ~ 24 and ~ 12 times compared to the reference material, and 8 h the PPBP + DAP under dry conditions, respectively. However, 10 h the PPBP improved the wear rate around ~ 23 and ~ 7 times compared to the reference material, and 10 h the PPBP + DAP under wet conditions, respectively. The main failure mechanisms over the worn tracks in both experimental conditions were smearing and spalling, as evidenced by SEM–EDS techniques.