Study The Wear Properties of Al-Cr-Mo Grey Cast Iron Alloys Produced For Metal Cutting Tools Application
Journal Title: American journal of Engineering Research - Year 2018, Vol 7, Issue 1
Abstract
This work investigated the microstructures and wear properties of produced Al-Cr-Mo grey cast iron alloys from grey cast iron scraps for metal cutting tools application. Six different alloys of grey cast iron with major compositions of Fe-3%Al-2.5%Cr-2%Mo, Fe-3%Al-2%Cr-2%Mo, Fe-3%Al-2.5%Cr-1.5%Mo, Fe3%Al-2%Cr-1.5%Mo, Fe-3%Al-1.5%Cr-1.5%Mo and Fe-3%Al-1.5%Cr-2%Mo were produced. The produced alloys were aged at ageing different temperatures of 150oC, 200oC, 250oC, 300oC and 350oC for forty-eight hours. Their microstructural analysis after ageing was done using Scanning Electron Microscope (SEM) and Energy Dispersive Spectrometer (EDS). Also chemical analysis and wear analysis were conducted. The results of the chemical analysis showed the reduction in carbon, silicon and phosphorus contents thereby reduced carbon equivalent and changed the alloys from hypereutectic to hypoeutectic. The result of microstructural analysis shows that various microstructural phases such as nitrides, primary carbides and eutectic carbides were precipitated in the pearlitic matrix with eutectic carbide (Cr7C3) having the highest peak intensity in the XRD diffraction pattern. The wear rate decreases with the ageing temperature until 300oC at which the minimum wear rate was obtained for each of the alloys, while wear resistance increases with the ageing temperature until 300oC at which the maximum wear resistance was obtained for each of the alloys.
Authors and Affiliations
Oyetunji, A, Opaluwa, A. I., Seidu, S. O
Keywords
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