Wear and Corrosion Resistance of Hardened Fe-Al-Mn Grinding Ball
Ratna Kartikasari1, *, Adi Subardi1, Anita Susiana1
1 Department of Mechanical Engineering, Institut Teknologi Nasional Yogyakarta, Jl. Babarsari No.1 Caturtunggal, Depok, Sleman, Yogyakarta, Indonesia
This study aimed to determine the effect of hardening temperature on microstructure, wear and corrosion resistance of Fe-Al-Mn alloy grinding ball.
Hardening process was carried out at 900oC, 950oC, 1000oC, 1050oC and 1100oC, held for 60 minutes and cooled using SAE 20 oil. Tests included chemical composition, SEM-EDS, wear and corrosion resistance test.
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 10-7 mm2/kg and 0.00026 mm/yr) of hardened Fe-Al-Mn grinding ball occurred at 900oC. The corrosion rate is extraordinary.
Microstructures of the Fe-Al-Mn alloy grinding ball after the hardening process are austenite, ferrite and kappa.
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* Address correspondence to this author at the Department of Mechanical Engineering, Institut Teknologi Nasional Yogyakarta, Jl. Babarsari No.1 Caturtunggal, Depok, Sleman, Yogyakarta, Indonesia; Tel: +62274 485390; E-mail: email@example.com