Universal single-layer solution for the repair of continuous casting rollers

WEARcore 746-O for steel mills requiring a universal single-layer solution for the repair of rollers over the full length of the continuous casting line, the self-shielded cored wire WEARcore 746-O is a compromise for using several product combinations. The innovative aspect of this combination is that the targeted chemical composition is reached in one single layer when overlaying onto commonly applied creep resistant steel roller materials such as 42CrMo4, 25CrMo4, 16CrMo44 and 21CrMoV5. 

This product combination gives a weld metal with a martensitic matrix with 5-10 % Ferrite and a hardness of ~45 HRC after PWHT of 6 hours at 500 °C. Nitro gen is added to enhance resistance to thermal fatigue and intergranular corrosion by reducing the formation of carbides at the grain boundaries.

When needed due to excessive wear, rollers can be re-built with the wire / flux combination WEARcore 20CrMo-S/ RECORD SK prior to hard facing with WEARcore 746-O.