EN
In article two technologies of hardening of metals and alloys are presented: volume hardening of metal preparations in the course of their hardening from a liquid state in firm, superficial hardening of details by means of an obkatyvaniye their rollers. The hypothesis of the mechanism of crushing macro – and metal microstructures is described at electrohydropulse influence – creation of the actual overcooling to 14 To and origin of the additional centers of crystallization, destruction of dendrites on border of firm and liquid phases by means of a compression wave. The technique of a choice of optimum effort of an obkatyvaniye by rollers depending on the geometrical sizes of a detail and a roller and hardness of a processed detail is presented.