Wear and Corrosion Resistance of Hardened Fe-Al-Mn Grinding Ball

Abstract

Chemical composition test results show that this alloy is high alloy steel because it contains 3.6% aluminum (Al), 13.6% manganese (Mn) and 1.1% carbon (C). Microstructures found are austenite, ferrite and kappa. EDS test results show that in the austenite phase, C decreased when hardening temperature increased. Ferrite phase contains Mn which increased when hardening temperature increased while C was the other way around. Mn is relatively stable in the kappa phase. The best wear and corrosion resistance (4.3 x 10 mm/kg and 0.00026 mm/yr) of hardened FeAl-Mn grinding ball occurred at 900C. The corrosion rate is extraordinary.