Study of regularities of structural-phase transformations during thermocyclic treatment of tool steels

Abstract Movement of carbon atoms to dislocations reduces the specific volume martensite phase, which, in turn, affects general level volumetric changes that occur as a result phase transformations during quenching. The measurements carried out on samples steel ShX15 showed minimum increase geometric dimensions is observed. Intermediate tempering and re-quenching do not change this pattern. At same temperature, for grade, degree tetragonality was recorded. This study has shown obtain high final properties tool steel, most optimal substructure with defectiveness crystal structure steel. It found use thermal cycling treatment contributes an structure. also aqueous solutions polymers quenching medium makes it possible cooling rate less than oil quenching, which helps reduce stresses.