Development of gas-shielded flux-cored wire for hardfacing of cold working-roll

The gas-shielded flux-cored wire for hardfacing of cold working-roll was studied. The experimental results showed that the hardness of the hardfacing layer was the highest when the C content of the deposited metal was 0. 69%. The total amount of Cr, Mo, W and V in the deposited metal was 6% ～ 10% and(Cr + V)/(Mo + W) = 1 ～ 1. 4, friction and wear-resistance of the hardfacing layer was better. When the addition of(RE + Ti) was 2%, metallurgical metamorphism was the best, the grain size was greatly reduced, and toughness was better. The developed wire had excellent welding technology. After 580 ℃ heat treatment, it were balanced between precipitation strengthening and matrix softening, and the hardness of the hardfacing metal reached the maximum, which satisfied the site repairing and operation requirement of coldroll.