METHOD for ROLLS STRENGTHENING FOR HOT AND COLD deformation of metals

摘要

The invention relates to metallurgy and can be used for regenerating of lasting quality of working coating of composite rolls. A method comprises the electro-slag melting on the roll of layer of alloyed steels, mainly of ledeburitic type. Hardening of the layer is carried out to the production of grain size of initial -ferrite of 50-200 m by cooling in the range of 1460-1340 °C with a speed of 15-20 °C/min. but pyrrhite transformation is carried out by cooling of pad weld in the range of 1340-1280 °C with the speed of 100-150 °C/min. A method provides the high level of structure dispersion and improvement of strength and wear indexes of the finished forming rolls.