Wear characteristics of Fe-25Cr-C-B eutectic cast alloys

• Published in: International journal of cast metals research (Online) 2004-06, Vol.17 (4), p.206-212
• Main Authors: Hartono, W., Goto, S., Aso, S., Komatsu, Y.
• Format: Article
• Language: English
• Subjects: EUTECTIC ALLOY; HIGH CHROMIUM WHITE CAST IRON; MICROSTRUCTURE; WEAR
• ISSN: 1364-0461; 1743-1336
• DOI: 10.1179/136404604225017537

To clarify the characteristics of Fe-25Cr-C-B cast alloys, a pin on disc friction and wear test was conducted on Fe-25Cr-0C-2.2B, Fe-25Cr-2.2C-1.0B and Fe-25Cr-3.5C-0B eutectic alloys, at various sliding velocities ranging from 0.125 to 1.99 m s -1 . The effects of sliding velocity on the wear resistance of these alloys were studied by the pin on disc friction and wear test, SEM and an X-ray diffraction method. The results show that the effects of sliding velocity on the increase in wear loss were different due to the differences in structure among the alloys. The X-ray diffraction method shows the presence of Fe 2 O 3 and Fe 3 O 4 in the alloys after conducting wear tests for almost all of the wear conditions. From the sliding velocity dependence of wear loss, worn surface observation after the wear tests and X-ray diffraction results, the relationships between the type of oxide and wear loss for Fe-25Cr- 0C-2.2B and Fe-25Cr-2.2C-0B alloys are not clear. However, the wear loss of Fe-25Cr-3.5C-0B alloy decreases at a sliding velocity of 0.5 m s -1 or lower, due to the presence of red Fe 2 O 3 oxide on the worn surface. The wear loss peaks at a sliding velocity of 0.95 m s -1 , and decreases again at a sliding velocity of 1.99 m -1 due to the presence of black Fe 3 O 4 oxide.