Izvorni znanstveni članak

https://doi.org/10.21278/TOF.41308

Application of Different Heat Treatment to Spheroidal Graphite Cast Iron and its Effect for Damping and Mode Shapes

Lutfiye Dahil ; Istanbul Aydın University, Faculty of Mechanical, Mechanical Engineering, Istanbul, Turkey
Abdurrahman Karabulut ; Afyon Kocatepe University, Faculty of Technology, Mechanical Engineering, Afyonkarahisar, Turkey

Sažetak

In this study, damping and mode shapes were investigated after boriding and austempering the spheroidal graphite cast iron (SGCI). The samples were boronised and austempered at 900℃ for 2 hours by employing the pack cementation method. The samples were cooled and tempered in a salt bath at 250℃ and 375℃ for 1 hour. Once the boriding and austempering processes were completed, the samples were cooled at room temperature and washed with plenty of water. The modal frequencies, damping ratios and mode shapes of these samples exposed to different heat treatments were acquired by using the experimental modal analysis (MA) method. The same characteristic features were acquired with the finite element method (FEM), and the results were compared. It was found that after the heat treatment the sample austempered at 250oC had a harder surface and a higher frequency than other samples.

Ključne riječi

spheroidal graphite cast iron; mode shapes; damping ratio

Hrčak ID:

187777

URI

https://hrcak.srce.hr/187777

Datum izdavanja:

18.10.2017.

Posjeta: 1.541 *