EFFECT OF SLIDING VELOCITY ON MICROSTRUCTURE OF DIAMOND BURNISHED 41Cr4 STEEL COMPONENTS

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  • TITLE: EFFECT OF SLIDING VELOCITY ON MICROSTRUCTURE OF DIAMOND BURNISHED 41Cr4 STEEL COMPONENTS
  • AUTHOR(S): V. P. Dunchev
  • ABSTRACT: In this article, the effect of the sliding velocity on the microstructures of diamond burnished 41Cr4 steel components was studied. The object of a comparative analysis of the microstructures of the surface and subsurface layers are three specimens. The specimens were diamond burnished with the same process parameters, but with different sliding velocity magnitudes: 50, 200, 300 m/min. The analyses of the microstructures were conducted using an NEOPHOT 2 metallographic microscope at X100, X400, and X800 magnifications. It was found that the generated heat increasing in the contact zone between the diamond tip and the surface been treated due to the increase of the sliding velocity is not sufficient for phase transformations in the surface layers of the studied steel. On the other hand, the higher sliding velocity increases the plasticity in the surface layers, which effect is reflected in changes in the microstructure - there is a tendency to modify the granular perlite to a fibrous structure.
  • PAGES: 5-
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