Analysis of Surface Spalling on a First Intermediate Roll in Sendzirmir Mills
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چکیده
A first intermediate roll of Sendzirmir mills was failure by surface spalling during operation. After analyzing by visual, stereo microscope, optical microscope, scanning electron microscope, glow-discharged spectrometer and hardness test, respectively, the results show that some voids and cracks existed on the contact surface as well as subsurface. Further examination verified inadequate hardness and inclusions were responsible for the failure of surface spalling. Keywords—Sendzirmir mills; surface spalling; fatigue failure; inclusion; contact stress
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