Structure of the surface of steel subjected to electric-spark alloying with refractory carbides
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Electron microscopical investigations have established that during “finish” ESA in air with transition metal carbides the surface of type U8 steel acquires a heterogeneous structure whose character depends on the duration of treatment and the physicochemical properties of the alloying carbide. A weakening of the homopolar component of atomic reaction in a carbide decreases the contribution from brittle fracture to its erosion, promoting the formation of a smoother surface microrelief with predominant participation of liquid phase.
KeywordsCarbide Brittle Liquid Phase Physicochemical Property Brittle Fracture
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