Hardening rolling rolls by hardfacing with an alloyed strip electrode under a ceramic flux

Abstract

The composition of 20KhN4MFB coldrolled strip for hardfacing rolling rolls was determined and production started. The deposited layer is characterized by high impact toughness, plasticity and resistance to cyclic heat changes. Additional alloying to increase the hardness and wear resistance of the metal is carried out through a ceramic flux. The composition of the new ceramic flux is characterized by improved welding and technological properties and relatively low chemical activity. Hardfacing of the hot rolling rolls increases the volume of rolled material per 1 mm of the reduction of the roll diameter.

Keywords::

• arc hardfacing
• strip electrode
• ceramic flux
• chemical activity
• deposited metal
• alloying
• impact toughness
• ductility
• wear resistance
• roll for hot rolling
• performance

Notes

^1. Patent 62591 (Ukraine).

^2. Taking into account the voltage drop in the current-conducting circuit.