Abstract:

The wettability and spreadability of weld beads have significant influences on the forming accu- racy of spare parts of armored equipments by welding rapid forming technology. The wettability and spreadability was characterized by the weld bead reinforcement, weld width and wetting angle. Effects of contents of FeSi45 and FeS in flux-cored components on wettability and spreadability for weld beads were researched by single weld bead. The transition mode of weld droplets was investigated by high velocity camera. The results indicate that the weld beads have better wettability and spreadability when the quality percent contents of FeSi45 and FeS in flux-cored components are 11. 21% and 0. 2% than other condi- tions. Under welding conditions with small current, the transition mode of weld droplets keeps big droplet without converting for the addition of FeSi45 and FeS. The transition process is steady, and there are no visible spatters. The superior enthalpy of droplets is important reason, for the good wettability and spread- ability of weld beads.

Key words: machinofacture technique and equipment, welding rapid forming technology, metal cored