Surfacing Welding Wire  in the most commonly encountered problem is cracking, to prevent cracking of the main method is:
1,Aluminium Alloy Welding Wire preheating before welding, control layer temperature, slow cooling after welding.
2, post-weld stress relief heat treatment.
3, to avoid the multi-layer welding cracking, low hydrogen welding electrodes.
4, if necessary, the surfacing layer between the base material and surfacing of transition (carbon equivalent, high toughness electrodes).