A novel metal powder welding wire with surfacing shielded by co 2 was developed.The flux core of the wire consists of several alloy powder

and a few mineral powder used for creating slag or making stable arc. As a result

the arc created by this kind of wire is more steady than normal ones during the welding process. Owing to welding process under the gas slag shield

the metal powder is saved in welding process

and its extremely thin slag makes it possible to weld continuously one layer after another without clearing slag. With the development of manufacture technology

this kind of flux cored wire is expected to be used widely in the future.