2017 Volume 58 Issue 6 Pages 945-950
The effects of the addition of small amounts of Ti on the phase constitution, microstructure, and wear resistance of Fe–B–C hypereutectic overlays produced using powder-wire composite arc welding were investigated. The Fe–B–C hypereutectic overlay phase consisted of TiB2 and TiC in addition to Fe and Fe2B with the addition of Ti. The addition of Ti inhibited growth of the Fe2B and Fe3(C,B) phases. When the Ti content reached 0.918 mass%, the daisy-like Fe3(C,B) phases disappeared, and precipitation of dispersed TiB2 and TiC began, which improved the wear resistance. Overlays without macroscopic cracks could be obtained. The wear mode of the Fe–B–C hypereutectic overlay changed from a mixture of microcutting and microfracture wear to microcutting wear.
