Introduction to metal powder type flux cored welding wire
First, the characteristics of metal powder type flux cored wire
Metal powder type flux-cored Welding Wires  which both the real strengths of both high deposition rate and low spatter and so the advantages of slag-type flux cored wire, the most notable advantages are:
A: higher deposition rate as the metal powder type flux cored wire is wrapped by the steel powder composition, the current density, melting fast. While the powder metal powder type flux cored wire in a large number of iron, ferroalloy and metal powder, non-metallic mineral content is less, and iron, ferroalloy and metal powder relative to the melting point of low melting point non-metallic mineral powder, making the melting lower energy powder, which the slag than solid wire and flux cored wire with a higher type of deposition rate.

Name diameter deposition rate welding parameters:
TEC-70 when the 1.2 210A/28V 52.3g/Min backing
The filling 1.2 275A/32V 74.6 g / Min
Surface covered when 1.2 335A/34V 94.8 g / Min
TM-56 (the same type of solid wire) 1.2 240A/28V 59.5 g / Min
Table 1, on the metal powder, solid wire deposition rate of the cf
It should be noted that the metal powder type flux cored wire in high voltage high current case, the smoke generated by welding, spatter, and arc column changes, the shape of molten pool does not produce major changes. In contrast, solid wire welding for the use of a large, its bead forming a sharp deterioration in the amount of splash, dust volume will greatly increase the mechanical properties of weld metal will also be affected.

B: higher deposition efficiency

As the metal powder type flux cored wire in the welding process almost no welding slag, spatter, so it is higher than the same type of solid wire, flux cored wire is more common deposition efficiency.
Name deposition efficiency current-voltage wire
TEC-70 1.2 275A/32V 94.1%
TM-56 1.2 250A/28V 93.8% (remove the splash and other attachments)
TWE-711 1.2 250A/28V 85.7%
Even in the most dominant solid wire deposition efficiency, the metal powder type flux cored wire is also a leading position. Compared with the same type of flux cored wire is even more obvious advantages.

C: better welding molding

Because the metal powder type flux-cored arc good characteristics and low amount of dust and small splash, so that the welding process, you can avoid defects such as welding slag, convenient clean-up each seam. And the visibility of the welding operation, easy control of the operator to better pool shape, better welding effect. While also avoiding the reality of cored wire welding, there's the finger-like penetration.
Figure 1, solid wire welds simulation Figure II simulation of metal powder flux cored wire weld
Metal powder flux cored wire welding of the transition type for the spray transfer mode, the tiny metal welding fine-grained with excellent wetting, especially in the lap of the sheet metal welding, metal powder type flux-cored wire weld smooth, forming beautiful, even without groove, lap of the plate in the welding zone, the weld can also be the perfect fusion of base metal.
D: faster welding speed
As the metal powder type flux cored wire with the above three advantages, it can achieve a faster welding speed.
Name of current-voltage wire welding speed can be achieved:

TEC-70 1.2 335A/34V 1300mm/Min
TM-56 1.2 330A/32V 700 mm / Min
TM-70C 1.6 400A/40V 800 mm / Min

In the welding speed, the metal powder type flux cored wire much more than the same type of solid wires. In the course of several experimental tests, the performance of the welding quality indicators.
In addition, the metal powder type flux cored wire also has low content of diffusible hydrogen (H4 below), the welding process noise, low dust, no welding slag, etc. (especially for environment-friendly enterprises).

Second, the metal powder flux cored wire and application of the classification

Metal powder type flux cored wire is currently in the world has been widely used in many developed countries, the classification method is also different, with TEC-70, for example, metal powder type flux cored wire in the United States because of their structural type flux cored wire with slag similar to the standard used to be attributed to AWS A5.20 T-1 type in the wire, but the metal powder type flux cored wire used in the operation and performance have similarities with the solid wire, AWS now be classified as of A5.18-94 standard in the E70C-3x and E70C-6xx. In Europe and Japan and other countries and regions will remain classified in the metal powder type flux cored wire flux cored wire for a class, in the protection of the use of gas, they use CO2 gas in Japan, a few cases by 80 â„… Ar +20 â„… CO2, and In Europe they use a rich mixture of argon gas welding(CO2 Gas Shielded Welding Wire).

At present the company's metal powder type flux cored wire are: TEC-70, TEC-80B2, TEC-90B3, TEC-80G.
Quite the same type of products: TM-56, TIG-1CM and TWE-811B2, TIG-2CM and TWE-911B3, TM-60. One TEC-70, TEC-80B2 and TEC-90B3 has developed mature, excellent performance, and the remaining R & D test products are constantly
TEC-70: instead of solid wire TM-56, because of its good forming and welding characteristics of high-speed welding, etc., especially for machinery and automotive manufacturing, especially for high-speed lines using the welding robot.
TEC-80B2 and TEC-90B3: quite the same type of product TWE-811B2M and TWE-911B3M, which is characterized by broadly consistent with the TEC-70.

Keywrods: aluminum flux core welding wire