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INVESTIGATION OF HARDENING AND TEMPERING DEFORMATIONS OF CARBURIZED LOW ALLOY STEEL

The article presents the investigation of plastic properties of carburized steel specimens during low tempering. Carburized articles often deform during quenching. The reasons of curvature are internal stresses produced by heterogeneity of structure, volume mismatch, different M S temperature of carburized and not carburized parts, uneven transformations, effect of transformation plasticity and other factors. The effect of asymmetrical carburization on steel transformation plasticity was examined evaluating the influence of structural compressive and tensile stress, which occurred because of volume mismatch. There was determined that internal stresses of carburized specimen exceed 300 MPa. The results of the experiment could be used for the development of heat treatment technologies of the carburized production – shafts, gears, cams, etc. DOI: http://dx.doi.org/10.5755/j01.mech.19.2.4155