Wear-resistant reinforcement of welds formed by H62 filler material
摘要
In many application scenarios, the connection of base materials must use copper-based welds. However, when such welds are required to be used in highly abrasive environments, their strength can rapidly decrease due to quick wear. The current approach to strengthening the welds is to modify the weld’s geometry, but this has shown limited effectiveness. Therefore, in this study, based on the optimization of the welding process for copper-based filler materials, resistance spot welding was employed to clad an amorphous Ni-based alloy on H62 welds to enhance their wear resistance. The results showed that the weld formed using annealed H62 filler material had a denser and more uniform internal microstructure compared to the weld formed with cold-rolled H62 filler material via induction welding. The maximum bending strength of the annealed H62 weld was 65.4 kgf·cm, an increase of 16.6% compared to the cold-rolled material. The hardness of the weld was 91.7 HV1, which was 17.1% higher than that of the cold-rolled material. Wet grinding tests indicated that, after wet grinding for 6 h, the bending strength of the weld formed with annealed H62 filler material and spot-welded with amorphous Ni-based alloy decreased by only 11.90%, indicating a good protective effect.