Deformation-induced dissolution of carbides of the Me(V, Mo)-C Type in high-manganese steels upon the friction effect

By the method of Mossbauer spectroscopy, it is shown that the aging at 923 K (for ten hours) of quenched stable austenite steels, FeC0.8Mn20V2Mo2 and FeC0.8Mn2V2, which leads to a depletion of austenite in carbon, causes the enhancement of steel magnetism owing to the development of antiferromagnetic ordering in these steels. A severe plastic deformation under conditions of dry sliding friction reduces the N,el temperature and the mean effective magnetic field of aged steels because of the deformation-induced dissolution of Me-C carbides and the transition of part of carbon atoms to a gamma solid solution. The deformation-induced dissolution of the carbide phase proceeds most vigorously in the FeC0.8Mn2V2 steel, which is characterized by the minimum size of carbide particles. It is concluded that the deformation-induced dissolution of the carbide phase is a factor that has a substantial positive effect on the wear resistance of austenite steels dispersion-hardened by aging.