impact forand hardness iron ore

Feb 01, 2004 The rather high hardness values exhibited by the medium chromium balls is basically due to the presence of carbides of the type (Cr,Fe) 7 C 3 and (Cr,Fe(C 3), which are harder (1200–1800 HV) than the FeC 3, cementite phase (840–1100 HV) associated with both unalloyed cast iron and the cast semi-steel. Heat-treatment, which in the main ...

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