A FLUX CORED WELDING WIRE THE METHOD FOR MANUFACTURING THE SAME AND USING OF THE SAME

摘要

The present invention provides a flux cored welding wire comprising a shell having a tubular cavity which accommodates flux. The shell is made of 400 series stainless steels. The deposited metal formed after the welding using the flux cored welding wire of the present invention has more uniform chemical compositions. Because the loss of chromium during the transition to the deposited metal is less than 0.1% recourses is saved and welding cost is reduced. The filling ratio of the flux cored welding wire of the present invention is 5% 25% (preferably 10% 20%). As a result not only the stability of the compositions in the flux is increased but also the disadvantages to the manufacture process caused by high filling ratio are avoided. The flux cored welding wire of the present invention will not be rusty even after it is exposed to the air for a long time. Therefore it has lower requirements for storage condition provides longer storage time and reduces manufacturing cost.