Instructions for use of flux cored wire

Flux cored wire shall be used for site equipment and places where gas consumption is inconvenient, and the wind resistance can be adjusted to level IV (< 15m / s), so it is usually not used for important planning.

Gas shielded flux cored wire has the advantages of both gas shielded welding and manual welding, such as perfect metallurgical reaction, good process function and low H. It is rare that the arc is stable and the spatter is less. The deposition speed is higher than that of various welding methods. Moreover, high current can be selected for all-round welding, and the lower level of equipment is required. Therefore, the application speed of this method in foreign countries is fast, and there are all kinds of products for selection.

Why do you think the resistance of flux cored wire is not good? The most important thing is the improper selection of welding materials and unreasonable process, rather than the inherent of this method.

Whether the self protective welding wire can be selected depends on why. If it is an important plan for welding low-alloy high-strength steel, it is necessary to select alkaline or titanium calcium plus Ni welding wire in order to ensure the quality. Its value is 2 ~ 3 times that of the ordinary flux cored welding wire. Its benefit is only windproof and simple, which needs to be determined according to the specific situation.

In China, many oil pipeline systems using self-protection welding wire are constructed in remote areas, and the quality can be guaranteed by this method (most of them use Lincoln 203ni1 of the United States, and its Akv guarantee value is - 30 ℃ up to 39-150j). The method of trekking tolerance of American products is to select titanium calcium slag system plus Ni. Because its melting speed can trek more than 50%, although its value is expensive, its general benefit is not lower than that of manual welding.

At that time, there were many foreign company products, which could be selected according to the abnormal function requirements of abnormal base metal and abnormal welding position.